Find flights
Deals
When to book
FAQs & Tips
Airlines

Find cheap flights from Ontario to Florida Keys from $73

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Florida Keys departing on 6/24. 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

Search hundreds of travel sites at once for deals on flights to Florida Keys

In the last 7 days travelers have searched 42,898,604 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Best Florida Keys Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Miami
Miami1 stop$156
Key West
Key West2 stops$283

Good to know

Low season

January

High season

July

Cheapest flight

$73
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 1% increase in price.
Flight from Ontario to Miami

FAQs - booking Florida Keys flights

  • How does KAYAK find such low prices on flights from Ontario to Florida Keys?

    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 Ontario to Florida Keys.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Florida Keys from Ontario 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 Ontario to Florida Keys?

    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 Florida Keys with an airline and back to Ontario with another airline.

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

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

See more FAQs

Top 5 airlines serving from Ontario to Florida Keys

Need help choosing which airline to fly with from Ontario to Florida Keys? 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.
8.0
DeltaOverall score based on 10295 reviews
7.4Food
8.6Crew
8.2Boarding
7.9Comfort
8.0Entertainment
Airline reviews

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

2.0 MediocreNairan, May 2024JFK - FLL
Read more about Delta reviews

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

5-hour delay due to storms in Tanoa and airspace restricted by Miami traffic controllers.

I would fly again the whole experience was great. The only feed back I can give that they don't do that American Airlines does is the crew there is more humorous with boarding and thank their passengers. It makes it more fun to fly with them. I would however fly Delta again.

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

They did a fine job. Can't wait to use Delta in the future.

Seat back monitors and outlets were dead and not working.

The experience was good and the flight departed on time and landed early

The flight was delayed but we got to our final destination.

public website still broken for years randomly blocking browsers with privacy options active after loading a page maybe once. check-in on laptop was almost impossible but eventually randomly worked. had to print pass at airport since couldn't get back in to load digital pass on mobile firefox or chrome. red eye flight so smooth onboarding, plenty of room to spread out, easy offboarding. onboard wifi instructions mention vpn can cause problems connecting but fails to also mention private dns. no printed or built in menu list, seems weird to require personal device to point at qr code link for menu which does not even allow direct ordering. people with health condition risk related dietary restrictions trying to avoid for example cholesterol and sugar are left guessing what they can order either way without nutritional info highlights (cranberry juice was minute maid cocktail with as much suger as typical can of soda). tap to pay wasn't working and always seems sketchy to manually enter card info. good movie variety, so limited tv was okay.

Boarding super slow with people allowed to linger in aisles

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

I had a great flight. Everything went smoothly and the flight arrived early.

On time take off…US cabins look tired and need of refresh!

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

Do not like the feeling of being in the basic economy. Everyone should feel good no matter what.

Terrible! The plane was old and you are required to connect your own device to their Wi-Fi rather than have entertainment options in the back of the seat in front of you. The Wi-Fi went out during the flight and there was only one plug for the devices every two seats. Three out of five surrounding my family did not work. The seats and spaces under them were so small I could not fit my backpack, which I’ve always brought on flights and fit before no problem. The crew were unpleasant and patronizing.

There was a group of school age passengers that were very loud and unruly with their chaperones were no where to be found.

Due to one crew member not showing up to work, our flight was significantly delayed causing us to miss our connecting flight in Houston to Mississippi causing us to be delayed by more than 6 hours and missing our event all together. Very disappointing. All because ONE crew member called in sick. United did grant us a $15 meal voucher, which was a small but appreciated concession that I wasn’t able to use because I ordered my lunch and paid for it before applying the concession, and the staff said it was too late to use it. Ugh! We also had a TWO delay coming back from Mississippi, but that was on American Airlines and it was due to weather, so not their fault. Anyway, not at all impressed with United’s handling of our flight and the HUGE disappointment of missing our important family event for our 90 year old mother. All that money and all that stress and emotions for nothing. Having to wait the hour to bring an employee from LAX seemed like something that should not have happened. Why don’t you have a local back-up? Santa Ana is not a little airport in a rural area.

Everything was fine once we actually got on our flight. It was more then annoying they canceled (delayed) our flight. We lost out on a day of our trip along with money on our stay. Plus we had to book another hotel. So expensive.

This flight was canceled and delayed several times without explanation. The plane was freezing cold and no wifi for messaging. Getting off the plane was terribly unorganized and felt like it took forever….

Use planes with TVs on flights over 4 hours. The free entertainment was a cheap in between solution for a very long flight that you don't even bother providing meals or decent snacks.

Flight was cancelled had to move to another gate late again no internet paid for the month and never can use it waste of money

Flight delayed over an over all day until it cancelled at 1:30am. Would not repeatedly delay that late. Offer hotel rooms and rebook early. Very difficult for families with small children

It was a good flight. Of course it was full, but it went well.

We sat on the plane for 1 hour because the airline was short handed could not be unloading.

We are gluten free, there were not any available complimentary gluten free options.

Flight delayed 3 times. We were directed to go to a gate across from our gate. The plane wasn't there yet so we had to wait for it to arrive, then deplane everyone and then wait again for the plane to be cleaned. After 45 minuites we were allowed on the plane. The first plane had mechanical issues. The 2nd plane must have had bathroom issues because we did not have any food service whatsoever. No snack or beverage. That made for a long time not to have anything considering that we had just made it to the original gate and we had no time to stop to get food or a drink. Then we didn't want to leave the gate to get food because we wouldn't know how much longer the delay would be. Then the next gate change. Had we been told that the total time would have been aprox 45 min later we would have left to get food and a beverage. We had to wait again for the okay to the pilot to take off so we were on the runway for another 20 min. Overall, we were delayed over 2 hours which felt like 4 hours.

Lots of weather delays that were poorly communicated and managed. I get there are weather delays but they didn’t make it clear what was happening or comfortable on the plane

Not enough help at airport during boarding process. Flight was delayed. Overall WORST flying experience I’ve ever had. Will NEVER FLT SPIRIT AGAIN

The non stop flight and able to go into Atlantic City airport. They could lower the prices. It starts out low but then if you want to bring luggage and pick your seat the price goes up quite a bit.

Flight expected to leave at 6:40 pm ended leaving at 8:00 am the following day. I slept in a cold airport. Never again Spirit for me…

My flight was cancelled!!! I had to spend 200.00 on another flight!!

Horrible. Delays, no customer support and fake promises and everything. i am suffering to help as due to connecting flight getting missed no support on ground and customer support window is closed and we are sitting o ground without anything

Terrible… missed our flight due to ridiculously long time to go thru baggage check-in!

Everything was really good but the seats are not very comfortable.

Spirit canceled the flight in March and never notified me!

Pretty good. Would’ve been excellent if we would have left on time and the crew wasn’t late.

Spirit airline tries to screw you at every opportunity. Spirit wanted 65$ for an extra pound in the suitcase Made me open the suitcase at the counter to remove 1 pound. Staff very cold and rude Will never fly spirit again and will recommend same to family and friends

I appreciated the upgrade to free cary-on bag and seat selection at no charge

It was delayed 9 hours for operational reasons, despite the plane arriving to the airport on time.

I am very disappointed with Frontier Airlines. They cancelled our flight because they couldn't find a crew member, and then didn't get us to our connecting flight. We had to cancel our whole vacation. We were promised flight and hotel vouchers, but they never sent them.

I fly Frontier because it’s affordable. I understand that the seats are tight and not the most comfortable…but that’s part of it. The problem with this flight was that there was a group of travelers directly behind me at the back of the plane who were ridiculously loud and obnoxious the entire flight. I’m pretty sure they were drunk and I could periodically smell an odd odor that I believe was one of them using a smokeless vape pen. The stewards had to remind them to keep quiet during the pre-flight instruction, but that was it. They never said another thing to them for the rest of the flight. It was a miserable.

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

I purchased a carry on bag online…was supposed to cost $72 but after a whole slew of bs charges, the total was over $175.00. Because of these hidden charges, I will not even consider flying Frontier ever again. It’s just not worth the hassle. I’m scratching this company off my list forever.

Flight delayed 3 times, resulting in late arrival, rental car place gave car away resulting in increased BS charges because I was late. Frontier blows.

It was impossible to change a carry-on for a checked bag after the initial selection. The flight was delayed 14 hours "to allow for a late arriving aircraft." The seats were shockingly uncomfortable. This was only the second time I've seen seats that didn't recline in an airline. The first was in an East Bloc airline before the fall if the Iron Curtain.

First time flying Frontier, I am not sure the Ala Carte menu of options is for me.

Flight was delayed on the runway for 40 minutes the crew did not even offer even water to passengers to compensate for the flight delayed. The flight was delayed due to aircraft mechanical issues. Worst customer service ever

Book cheap flights from Ontario to Florida Keys

Recent round-trip flight deals

7/9Tue
1 stopFrontier
21h 04mONT-MIA
7/16Tue
1 stopFrontier
14h 24mMIA-ONT
$156
7/10Wed
1 stopFrontier
13h 46mONT-MIA
7/17Wed
1 stopFrontier
11h 12mMIA-ONT
$158
7/8Mon
1 stopFrontier
26h 06mONT-MIA
7/16Tue
1 stopFrontier
26h 52mMIA-ONT
$159
7/10Wed
1 stopFrontier
13h 46mONT-MIA
7/17Wed
2 stopsFrontier
12h 35mMIA-ONT
$163
8/5Mon
1 stopDelta
8h 06mONT-MIA
8/13Tue
1 stopDelta
7h 13mMIA-ONT
$256
8/2Fri
1 stopAmerican Airlines
9h 16mONT-MIA
8/5Mon
1 stopAmerican Airlines
8h 40mMIA-ONT
$282
7/23Tue
2 stopsAmerican Airlines
12h 17mONT-EYW
8/6Tue
1 stopAmerican Airlines
8h 37mEYW-ONT
$283
7/29Mon
1 stopDelta
9h 45mONT-MIA
8/7Wed
1 stopDelta
7h 13mMIA-ONT
$307
10/30Wed
1 stopUnited Airlines
7h 23mONT-MIA
11/1Fri
1 stopUnited Airlines
7h 40mMIA-ONT
$327
8/14Wed
1 stopUnited Airlines
6h 53mONT-MIA
8/22Thu
1 stopUnited Airlines
7h 26mMIA-ONT
$338

Search by stops

Search by airline

Search by price

Recent one-way flight deals

6/24Mon
1 stopFrontier
21h 11mONT-MIA
$73
6/17Mon
1 stopFrontier
24h 24mONT-MIA
$74
7/27Sat
1 stopAmerican Airlines
6h 59mONT-MIA
$104
9/8Sun
1 stopJetBlue
12h 29mONT-MIA
$127
11/20Wed
1 stopAmerican Airlines
6h 27mONT-MIA
$128
8/21Wed
1 stopDelta
8h 06mONT-MIA
$147
9/22Sun
1 stopJetBlue
12h 29mONT-MIA
$164
9/25Wed
1 stopUnited Airlines
7h 35mONT-MIA
$168
9/2Mon
1 stopUnited Airlines
6h 53mONT-MIA
$169
8/29Thu
1 stopDelta
8h 06mONT-MIA
$256

Search by stops

Search by airline

Search by price

Last minute flights from Ontario to Florida Keys

Last minute flight, train and bus deals

6/14Fri
multi-stopFrontier
28h 30mONT-MIA
6/18Tue
multi-stopFrontier
11h 42mMIA-ONT
$240
6/13Thu
multi-stopAmerican Airlines
7h 35mONT-MIA
6/20Thu
multi-stopAmerican Airlines
7h 45mMIA-ONT
$251
6/14Fri
multi-stopFrontier
28h 30mONT-MIA
6/19Wed
multi-stopFrontier
22h 42mMIA-ONT
$261
6/14Fri
multi-stopFrontier
28h 30mONT-MIA
6/21Fri
multi-stopFrontier
16h 58mMIA-ONT
$275
6/11Tue
multi-stopSouthwest
10h 25mONT-MIA
6/15Sat
multi-stopSouthwest
10h 55mMIA-ONT
$461
6/12Wed
multi-stopUnited Airlines
7h 17mONT-MIA
6/17Mon
multi-stopUnited Airlines
8h 19mMIA-ONT
$478
6/11Tue
multi-stopUnited Airlines
7h 17mONT-MIA
6/18Tue
multi-stopUnited Airlines
13h 19mMIA-ONT
$483
6/14Fri
multi-stopAmerican Airlines
7h 24mONT-EYW
6/21Fri
multi-stopAmerican Airlines
9h 44mEYW-ONT
$498
6/13Thu
multi-stopDelta
8h 19mONT-MIA
6/21Fri
multi-stopDelta
7h 48mMIA-ONT
$508
6/11Tue
multi-stopDelta
12h 25mONT-MIA
6/15Sat
multi-stopDelta
7h 48mMIA-ONT
$527

Search by stops

Search by airline

Search by price

Ontario - Florida Keys Flights

Departure:

Ontario (ONT)United States

Cabin classes:

$356
$153
$296
$37