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BOS - KGS

$977 Find cheap flights from Boston to Kos

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Boston to Kos departing on 10/2. 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
Wed 7/10
Wed 7/17

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Kos, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to Kos, as well as popular online travel agencies
In the last 7 days travelers have searched 42,898,604 times on KAYAK, and here is why:

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Cheap flight deals from Boston to Kos (BOS-KGS)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to Kos 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.
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7:00 am - 9:15 pmBOS-KGS
31h 15m3 stops
12:40 pm - 8:06 pmKGS-BOS
38h 26m3 stops
Wed, Oct 2 - Sat, Oct 12
4:10 pm - 6:25 pmBOS-KGS
19h 15m1 stop
4:35 pm - 1:20 pmKGS-BOS
27h 45m1 stop
$1,005Condor
Find Deal
Mon, Sep 2 - Fri, Sep 6
7:15 pm - 9:15 pmBOS-KGS
19h 00m2 stops
12:40 pm - 8:06 pmKGS-BOS
38h 26m3 stops
$1,009
Find Deal
Wed, Oct 2 - Sat, Oct 12
9:25 pm - 9:35 pmBOS-KGS
17h 10m1 stop
10:25 pm - 6:50 pmKGS-BOS
27h 25m1 stop
$1,018Aer Lingus
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Mon, Sep 2 - Tue, Sep 10
8:05 pm - 5:20 pmBOS-KGS
14h 15m2 stops
9:35 am - 5:50 pmKGS-BOS
39h 15m2 stops
$1,072Lufthansa
Find Deal
Wed, Oct 2 - Sat, Oct 12
10:00 pm - 5:20 pmBOS-KGS
12h 20m1 stop
9:35 am - 5:50 pmKGS-BOS
39h 15m2 stops
$1,079Lufthansa
Find Deal
Wed, Oct 2 - Sat, Oct 12
10:00 pm - 8:25 pmBOS-KGS
15h 25m1 stop
1:10 pm - 7:50 pmKGS-BOS
13h 40m1 stop
$1,096British Airways
Find Deal
Wed, Oct 2 - Sat, Oct 12
5:50 pm - 8:25 pmBOS-KGS
19h 35m2 stops
1:10 pm - 10:45 pmKGS-BOS
16h 35m1 stop
$1,100British Airways
Find Deal
Wed, Oct 2 - Sat, Oct 12
5:10 pm - 3:10 pmBOS-KGS
15h 00m1 stop
8:50 pm - 3:20 pmKGS-BOS
25h 30m1 stop
$1,184SWISS
Find Deal
Thu, Sep 5 - Sat, Sep 14
5:30 pm - 9:35 pmBOS-KGS
21h 05m1 stop
11:00 pm - 1:50 pmKGS-BOS
21h 50m1 stop
$1,892Aer Lingus
Find Deal
Mon, Jul 1 - Sat, Jul 6

Good to know

Cheapest flight

$977
Flight from Boston to Kos

When to book flights from Boston to Kos

Are your dates flexible? Find out the best times to travel from Boston to Kos 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 Boston to Kos

  • What is the cheapest flight from Boston to Kos?

    In the last 3 days, the lowest price for a flight from Boston to Kos was $977 for a round-trip ticket.

  • Do I need a passport to fly between Boston and Kos?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Boston and on arrival in Kos.

  • Which aircraft models fly most regularly from Boston to Kos?

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

  • Which airline alliances offer flights from Boston to Kos?

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

  • Which is the best airline for flights from Boston to Kos, SWISS or Lufthansa?

    The two airlines most popular with KAYAK users for flights from Boston to Kos are SWISS and Lufthansa. With an average price for the route of $1,366 and an overall rating of 7.7, SWISS is the most popular choice. Lufthansa is also a great choice for the route, with an average price of $1,184 and an overall rating of 6.9.

  • How does KAYAK find such low prices on flights from Boston to Kos?

    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 Boston to Kos.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kos from Boston 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 Boston to Kos?

    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 Kos with an airline and back to Boston with another airline. Booking your flights between Boston and KGS can sometimes prove cheaper using this method.

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

    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 Kos from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top airlines flying from Boston to Kos

 
See real verified KAYAK customer reviews for airlines flying from Boston to Kos. 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 Boston to Kos? 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.
7.7
SWISSOverall score based on 1912 reviews
7.3Food
7.5Comfort
7.8Boarding
7.1Entertainment
8.4Crew
Airline reviews

I arrived 59 minutes before the flight in Tampa due to Massive traffic jam and the flight was closed and I was told that I’d simply have to “book a new ticket on line myself and the gate agents couldn’t help me”. Even though the flight was delayed over 30 minutes, (leaving one hour and 29 minutes before departure, they refused to assist in any way explaining that it’s automatic and there can be no exceptions. Horrible experience due to poor management at gate. I fly this option 2-3 times a year and have a good experience with the cabin crew etc. But, Tampa agents are not trained or allowed customer service. I once was a gate agent for USAir, I know times have changed, but forcing me to purchase a new ticket and complete indifference and inconvenience. No thanks

2.0 MediocreRob, May 2024TPA - ZRH
Read more about SWISS reviews

I arrived 59 minutes before the flight in Tampa due to Massive traffic jam and the flight was closed and I was told that I’d simply have to “book a new ticket on line myself and the gate agents couldn’t help me”. Even though the flight was delayed over 30 minutes, (leaving one hour and 29 minutes before departure, they refused to assist in any way explaining that it’s automatic and there can be no exceptions. Horrible experience due to poor management at gate. I fly this option 2-3 times a year and have a good experience with the cabin crew etc. But, Tampa agents are not trained or allowed customer service. I once was a gate agent for USAir, I know times have changed, but forcing me to purchase a new ticket and complete indifference and inconvenience. No thanks

Crew members were good. Seats were packed and too tight .

Carry on luggage size for economy passengers significantly smaller than other airlines, so nearly all ecomy passengers had their bags taken and checked.

Had a short layover in Zurich, luggage marked expedite and short layover but still didn’t get luggage when arrived in Split until 3 days later even though husband got his.

On time flight, I requested wheelchair in Zurich , when I arrived they were no where to be found, I had one hour between flights I had to walk with great difficulty.

Far above average. The level of quality and service has really improved and passed most US carriers on this route. Go Edelweiss!

We had issues with upgrading our seats. The flight itself was fine.

Horrible experience. They "GAME" with seats they decided to play where you can`t select or get seat during check-in without paying and then forcing you to stay long line at the Customer Service at the gate to get a boarding ticket with seat assigned is pathetic. Will never fly with United again!

So terrible. They would not rebook me for a flight until 2 days. I had to spend so much money to get my own flight. They were rude and not helpful.

Overall a good experience, the flight was on time, the crew very attentive and friendly. However the seats are too cramped, there is no space, and as soon as the person in front reclines the seat, it's literally in your face.

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.

Boston Logan is a crummy airport - signage is terrible or lacking in areas. Boarding seemed to be a free for all and with all the different airlines speaking, you couldn't tell who was supposed to be where and when. Plain and simple, airlines should board from the back of the plane to the front. Also someone was sitting in my seat. By the time that was figured out, I had to place my overhead behind me which made de-planing more difficult. Logan is not Lufthansa's fault so that is not on them, Boarding is on them! Still, overall it was a Good Experience flying with Lufthansa. This is not my first flight with them...

Overall, the flight was comfortable without any serious issues. Transit through Frankfurt airport was a little confusing, but not too difficult if you follow the signs

There was a screaming child behind our seats. This prevented us from getting any sleep during the night.

Book cheap flights from Boston to Kos

One-way flight deals

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4924 miBOS-KGS

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Boston - Kos Flights

Departure:

Boston (BOS)United States

Destination:

Kos (KGS)Greece

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