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CHI - SOF

$247 Find cheap flights from Chicago to Sofia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Chicago to Sofia departing on 8/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Thu 7/11
Thu 7/18

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sofia.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Chicago to Sofia.
In the last 7 days travelers have searched 44,212,782 times on KAYAK, and here is why:

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Cheap flight deals from Chicago to Sofia (CHI-SOF)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Chicago to Sofia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:00 am - 2:10 pmORD-SOF
21h 10m1 stop
6:05 pm - 12:50 pmSOF-ORD
26h 45m1 stop
Tue, Nov 5 - Tue, Nov 12
11:33 am - 2:10 pmORD-SOF
18h 37m2 stops
6:05 pm - 1:55 pmSOF-ORD
27h 50m1 stop
$506British Airways
Find Deal
Tue, Nov 5 - Tue, Nov 12
8:30 pm - 8:30 amORD-SOF
28h 00m1 stop
9:20 am - 9:40 amSOF-ORD
32h 20m1 stop
$538Turkish Airlines
Find Deal
Mon, Sep 23 - Mon, Oct 21
9:55 pm - 1:50 pmORD-SOF
31h 55m2 stops
2:35 pm - 8:00 pmSOF-ORD
13h 25m1 stop
$564LOT
Find Deal
Sun, Nov 10 - Sun, Nov 24
11:25 am - 2:55 pmORD-SOF
19h 30m1 stop
9:20 am - 9:40 amSOF-ORD
32h 20m1 stop
$568Turkish Airlines
Find Deal
Wed, Aug 28 - Fri, Oct 11
9:55 pm - 5:45 pmORD-SOF
11h 50m1 stop
2:35 pm - 8:00 pmSOF-ORD
13h 25m1 stop
$574LOT
Find Deal
Fri, Nov 8 - Fri, Nov 22
5:50 pm - 6:10 pmORD-SOF
16h 20m2 stops
2:10 pm - 8:05 pmSOF-ORD
13h 55m1 stop
$600United Airlines
Find Deal
Thu, Nov 7 - Thu, Nov 21
6:00 pm - 10:45 pmORD-SOF
20h 45m1 stop
6:00 am - 11:12 pmSOF-ORD
25h 12m2 stops
$612United Airlines
Find Deal
Sun, Dec 8 - Sun, Dec 22
9:25 pm - 11:00 pmORD-SOF
17h 35m1 stop
6:55 pm - 6:25 pmSOF-ORD
31h 30m1 stop
$661Lufthansa
Find Deal
Wed, Jul 24 - Thu, Jan 23
9:25 pm - 6:45 pmORD-SOF
13h 20m1 stop
2:20 pm - 8:05 pmSOF-ORD
13h 45m1 stop
$662Lufthansa
Find Deal
Tue, Jul 23 - Mon, Jan 20

Flights from Chicago to Sofia - Travel Insights & Trends

Get data-powered insights and trends into flights from Chicago to Sofia to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Chicago to Sofia?

The average price of all flights from Chicago to Sofia clicked on KAYAK for each day over the last 12 months.
For Chicago to Sofia, Thursday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Sofia back to Chicago, the best deals are generally found on Friday, with Sunday being the most expensive.

What is the cheapest month to fly from Chicago to Sofia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Chicago to Sofia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Chicago to Sofia is November, where tickets cost $579 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,273 and $1,198 respectively.

How far in advance should I book a flight from Chicago to Sofia?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Chicago to Sofia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Chicago to Sofia, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 1 day before departure.

Which airlines provide the cheapest flights from Chicago to Sofia?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Sofia from Chicago were found on SWISS ($488) and Lufthansa ($514), and the lowest round-trip tickets were found on British Airways ($506) and Turkish Airlines ($538).

Good to know

Low season

January

High season

July

Cheapest flight

$247
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 43% increase in price.
Flight from Chicago O'Hare Airport to Sofia

When to book flights from Chicago to Sofia

Are your dates flexible? Find out the best times to travel from Chicago to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Chicago to Sofia

  • Does SOF have an on-site hotel?

    If you intend to stay at a hotel within SOF grounds, you're in luck, as the airport boasts the Ibis Sofia Airport. A 10min walk from Terminal A, this hotel boasts elite rooms. Thus, it's safe to say that your comfort is guaranteed at this hotel.

  • How can I move from Terminal 1 to 2 at SOF?

    In case you'd like to move from Terminal 1 to 2, or vice versa, you can board the free shuttle bus that connects these terminals. Daily, this bus operates from 5 am to 11 pm. It covers the route every 15min.

  • Are there nursing rooms at ORD?

    If you'd like to breastfeed your infant while waiting for your flight to Sofia at ORD, you need not worry about struggling to find a private space to feed your baby, as ORD features several nursing rooms. The said nursing rooms are near Gate B10 in Terminal 1, on the walkway between Gates E5 and F9 in Terminal 2, near the Urban Garden in Terminal 3's rotunda, and a short distance from Gate M14 in Terminal 5.

  • Where can I get assistance at MDW?

    If you need assistance at MDW, you should visit the airport's information desk, situated at the Main Entrance of the airport's terminal. At this desk, you'll get all the help you need, as it is manned by informed airport staff.

  • What is the cheapest flight from Chicago to Sofia?

    In the last 3 days, the lowest price for a flight from Chicago to Sofia was $247 for a one-way ticket and $501 for a round-trip.

  • Do I need a passport to fly between Chicago and Sofia?

    Yes, you’ll need a passport to travel to Sofia from Chicago.

  • Which airports will I be using when flying from Chicago to Sofia?

    When flying out of Chicago you will be using one of these airports: Chicago Midway or Chicago O'Hare Intl. You will be landing at Sofia.

  • Which aircraft models fly most regularly from Chicago to Sofia?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Chicago to Sofia?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Chicago and Sofia, with Star Alliance being the most commonly used for this route.

  • What is the most popular layover when flying to Sofia from Chicago?

    Munich is the most popular layover city among KAYAK users traveling from Chicago to Sofia.

  • Which is the best airline for flights from Chicago to Sofia, SWISS or Austrian Airlines?

    The two airlines most popular with KAYAK users for flights from Chicago to Sofia are SWISS and Austrian Airlines. With an average price for the route of $1,064 and an overall rating of 7.7, SWISS is the most popular choice. Austrian Airlines is also a great choice for the route, with an average price of $913 and an overall rating of 7.6.

  • How does KAYAK find such low prices on flights from Chicago to Sofia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Chicago to Sofia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Chicago to Sofia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Chicago is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Chicago to Sofia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sofia with an airline and back to Chicago with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Chicago to Sofia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sofia from Chicago up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Chicago to Sofia

  • In Chicago, you can board your flight to Sofia at Chicago Midway International Airport (MDW) or O'Hare International Airport (ORD). If you'd like to fly cheaply to Sofia, ORD is the airport for you, as it serves the cheapest flights from Chicago to the Bulgarian capital. On the other, if you'd like to board your flight at an airport where you'll encounter the least traffic, MDW is the airport for you.
  • On the day you're set to fly to Sofia from ORD or MDW, you should get to your Chicago airport of choice at least 2h ahead of your flight. This will give you adequate time to go through the airport's security checkpoints in time for your flight. It will also give you enough time to check out the airport's points of interest.
  • All airlines traveling from ORD and MDW to Sofia Airport (SOF) offer elite-assisted travel services to passengers with disabilities, provided that the said passengers contact them at least 72h before their flight. Therefore, if you have special needs and require special in-flight services, you should contact the airline you plan on traveling with from your preferred Chicago airport to Sofia at least 72 before your flight.
  • To be able to purchase items and pay for services easily while in Sofia, you should convert some of your cash to Bulgaria's local currency at one of SOF's currency exchange sites run by ICE Exchange. Two are located in 2, while one is found in Terminal 1.
  • SOF features locations for car rentals like Avis, Budget, SIXT, Thrifty, Europcar, and Enterprise in Terminal 2. This being the case, if you'd like to hire a car once you land at SOF, you'll have a variety of car rental agencies to choose from.
See more tips

Top 5 airlines serving from Chicago to Sofia

 
See real verified KAYAK customer reviews for airlines flying from Chicago to Sofia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Chicago to Sofia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
Austrian AirlinesOverall score based on 990 reviews
6.9Entertainment
6.9Food
7.5Comfort
8.2Crew
7.6Boarding
Airline reviews

No delays, helpful staff, well organised. The check in and boarding procedures ran smoothly. The only thing that put me off is that the meal had spicy peppers in. I would have appreciated at least a warning (if i couldn't have a choice) so as to simply not eat them because they were too spicy.

8.0 ExcellentAnonymous, May 2024ORD - VIE
Read more about Austrian Airlines reviews

No delays, helpful staff, well organised. The check in and boarding procedures ran smoothly. The only thing that put me off is that the meal had spicy peppers in. I would have appreciated at least a warning (if i couldn't have a choice) so as to simply not eat them because they were too spicy.

Schedule and on time departure and arrival were great. The crew was good, but a change in aircraft bumped many of us from our expected seats. It was a crowded flight, but the cabin crew did their best to keep things under control.

The crew was attentive but not intrusive, and was always kind in every interaction.

the flight was canceled, and I had to stay more than six days at hotel . waiting . then I had to buy new ticket. really it was very bad experience, and I lost a lot of money and time , and your airline said sorry

Management and staff att viena wasn’t professional,and they are not good by how to communicate and solve the problem, I was shocked , as I know Austrian airlines was amusing Thank you

I bought the ticket a month before my flight but checked in couple hours before my flight and had to wait seat assignment just before take off. On top of that there was not enough room in the overhead bin for my luggage.

The baggage arrived damaged and i spent EUR 300 on the baggage a month ago. No responsibility from airline or the handles.

The flight was late. We accommodated other missed flights, and the plane was full of people, without space to store carry-on luggage. They lost our checked luggage for the entire flight and delivered it after two days.

There were a number of passengers scheduled to transfer to the flight from Vienna to Warsaw. None of them made it because the crew failed to assist them in getting to the gate for the Warsaw bound flight in time. It could have been done very easily with proper assistance.

It becomes like Wizz air, no good, bad comfort and you should pay for 20kg bag.

Overnight flight in the old style Business class, but still very good.

I was in business class, without the business class amenities. Large seat with lots of legroom, but no TV or bed. Food was okay, but I did enjoy the Turkish red wine.

Excellent service and comfort from the moment you check in. Flight crew is hyper focused on making passengers comfortable and at ease. It’s like a flying hotel!

Only chicken as a meat dish through out the flight

Nothing really was great as such. Seen other no name airlines perform better.

Quality of service on board was very inconsistent. FA service primarily seemed robotic and they barely engaged with passengers

I’m unclear why I had to pay extra for assigned seats as Turkish airlines did not honor the seating. We were placed across the aisle from each other on TK 34, and were seated behind one another on TK 694. Because my name was misspelled on e-ticket (Klawiter, instead of Klawitter) I could not log onto website to get the connection gate number in Istanbul. The monitors in the airport were a jumbled mess 1/2 Arabic and 1/2 English.

On line check in needs a lot of improvement. I tried and gave up.

Food not good, flight attendants not the best, not accommodating very ruff

the female flight attendant was racist towards me. I could tell she treated the two other passengers next to me with more softness.

Flighty delayed on boarding - then group 1 had to check their carry on bags but groups 3 and beyond could carry bags on - very inconvenient for weekend business trip with no checked baggage. Then delayed on the runway - before take off. No communication from pilot on why or how long. Wifi/Entertainment didn't work for 4+ flight. Upon arrival, attendants announced wrong carousel for baggage claim - everyone was waiting at the wrong place for their checked bags. This was a mess united!

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

Standard flight experience, but there is only power at the seat to row 20 on the aircraft, on my initial check in it did not say that was the case

Energetic crew - flight full of swiftied going to Taylor's opening show in Paris! Long lines for bathroom made out kind of suck though

I’ve had a couple flights this week on United that were delayed by an hour or more

Great! The plane was decently sized and comfortable. The staff was nice and there was great in flight entertainment

Last minute gate change nearly caused us to miss our flight. Change was not announced or displayed in the main board at the old gate. Terrible communication. When we landed we had to wait 20 minutes because there was another plane at the assigned gate. Not the crew’s fault, but adding 20 minutes to a 45 minute flight sucked.

Nothing beats ANA customer service on my opinion. Maybe because of their Japanese culture (and food). Arigatō

delay several times and wait extra long to board. no entertainment service because there are problem for some rows. always encounter some delays for the last flight of the day.

Flight delayed for 2 hours due to a part. The plane sat waiting for boarding for a long time and during final preflight inspection the issue was found. Why not do the preflight inspection sooner if you know the plane is being used?

All good! But sandwiches for breakfast need to be warm!!!!! Not cold!!! You do not want anything cold in your stomach in the morning!… think about it!

LOT airlines wasn't the best. They had trouble with boarding and they didn't have my information on file the right way. They change last minute details without us knowing and everything was a HOT MESS. Lot airlines also lost my baggae which was the carseat and haven't responded to any of my emails.

Garbage airline at a premium price. Both ways was unable to purchase seats before checking. Called, messaged on Facebook, and emailed. All three times staff said I could, and gave me form responses on how to, despite providing screenshots/explaining beforehand showing I couldn't. At check-in both times they sat me and my wife separately, despite booking together. Both legs the USB port in my entertainment system was broken. Food is atrocious. Seats are old and uncomfortable, and struggle to adjust. Toilets were like portapotties at a concert.

Would have liked to have Wi-Fi on the longer flight (nyc-Warsaw)

My flight was cancelled and I went through hell to get it fixed, with no help from the website I booked it on. My reservation was cancelled AGAIN by the site I booked on without my knowledge a week later. The flight itself that I finally got on was awful. Drunk man belligerent the entire flight, I don't understand how he was allowed on the flight.

Lot still has not refunded me after they cancelled my flight to India!! Kayak had been awful at getting me this refund too. Will NEVER be using kayak or LOT again.

Tv screen not working. Food in business class was cold & not available

The customer service and the flight experience were very good!

My bag was lost despite an almost 8 hour layover in Warsaw. Nearly 12 hours after my arrival, I have not heard anything about it.

The plane was very comfortable, the seats were great for overnight flight. The bathrooms were spotless the entire flight

United delayed the flight to assist customers to make the connection. The Ohara customs area was overwhelm which created an issue for customers trying to make the Little Rock connection. The delayed allow several customers to make the final flight into Little Rock.

Missed our flight to London and we were put on coach seats to Munich.

Terrible. Missed our flight to Newark as well as our flight to London. Complete disaster

They canceled our flight last minute and we had to get another flight with twice the cost

Dinner was excellent - beef stew, the eggs for breakfast were only ok. It was soooo nice that there were so many options for movies and games.

Captain waited 45 minutes for late passengers boarding from Washington DC to Munich which was nice for them but caused our luggage to miss boarding our connection on to Bucharest. We then did not receive our luggage for about 48 hours after landing which was very inconvenient for our travel.

Poor, we had 1 hour to grab our checked luggage, go through customs, recheck bags and run across terminals to make our United flight. Poorly planned connections.

Check in in Albuquerque was awful. The people were great but they were over loaded. The procedures were terrible. We got through fine but it took 90+ minutes.

Will try to not fly with them again. Delays because of weather but got redirected to an airport where I could not make connection.

Staff didn’t care in business class. Closed the door on my mom while she was on the jetbridge and flight attendant told me she would make it from the connecting flight. They lied. My luggage was damaged on arrival. No success in filing damage claim.

Book cheap flights from Chicago to Sofia

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Chicago to Sofia found on KAYAK in the last 72 hours.
8/21Wed
3 stops
21h 04mORD-SOF
$247
9/23Mon
2 stops
27h 32mORD-SOF
$249
8/13Tue
2 stops
42h 20mORD-SOF
$263
8/5Mon
1 stopSWISS
33h 55mORD-SOF
$488
8/6Tue
1 stopLufthansa
30h 45mORD-SOF
$514
8/4Sun
1 stopLufthansa
22h 35mORD-SOF
$525
8/4Sun
1 stopTurkish Airlines
34h 25mORD-SOF
$551
9/13Fri
1 stopLOT
12h 15mORD-SOF
$599
8/4Sun
2 stopsLOT
36h 45mORD-SOF
$627
6/17Mon
1 stopTurkish Airlines
13h 05mORD-SOF
$832

Search by stops

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Last minute flights from Chicago to Sofia

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from Chicago to Sofia that are departing in the next 10 days.
6/16Sun
multi-stopLOT
36h 45mORD-SOF
6/29Sat
multi-stopLOT
28h 30mSOF-ORD
$1,315
6/16Sun
multi-stopTurkish Airlines
34h 25mORD-SOF
8/11Sun
multi-stopTurkish Airlines
25h 55mSOF-ORD
$1,362
6/16Sun
multi-stopTurkish Airlines
28h 00mORD-SOF
6/29Sat
multi-stopTurkish Airlines
25h 55mSOF-ORD
$1,385
6/15Sat
multi-stopLOT
12h 15mORD-SOF
6/29Sat
multi-stopLOT
13h 00mSOF-ORD
$1,407
6/16Sun
multi-stop
37h 10mORD-SOF
8/11Sun
multi-stop
29h 00mSOF-ORD
$1,455
6/16Sun
multi-stopLOT
36h 45mORD-SOF
8/11Sun
multi-stopLOT
13h 00mSOF-ORD
$1,476
6/16Sun
multi-stop
36h 15mORD-SOF
8/11Sun
multi-stop
29h 00mSOF-ORD
$1,480
6/15Sat
multi-stopLOT
12h 15mORD-SOF
6/29Sat
multi-stopLOT
56h 30mSOF-ORD
$1,482
6/16Sun
multi-stopLOT
36h 45mORD-SOF
6/29Sat
multi-stopLOT
52h 30mSOF-ORD
$1,496
6/16Sun
multi-stop
37h 10mORD-SOF
8/11Sun
multi-stop
25h 00mSOF-ORD
$1,701

Search by stops

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Flights to Sofia

Destination:

Sofia (SOF)Bulgaria

Return flight deals:

Sofia - Chicago

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