$87 Find Cheap Flights from Ontario to Florida Keys

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 10/30. 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
1 adult, Economy

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Florida Keys, 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 Ontario to Florida Keys, as well as popular online travel agencies
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Cheap Flights from Ontario to Florida Keys

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Miami
Miami1 stop$162
Key West
Key West1 stop$339
Miami
Miami1 stop$162
Key West
Key West1 stop$339

Book Cheap Ontario to Florida Keys Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Florida Keys 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 for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Florida Keys

Thu, Nov 13 - Sat, Nov 15
Frontier Logo
11:59 am - 10:02 pmONT-MIA
7h 03m1 stop
Frontier Logo
6:00 am - 11:10 amMIA-ONT
8h 10m1 stop
$162Frontier
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Thu, Oct 30 - Fri, Nov 7
Frontier Logo
1:46 pm - 2:23 pmONT-MIA
21h 37m1 stop
Frontier Logo
8:00 am - 6:49 pmMIA-ONT
13h 49m1 stop
$168Frontier
Find Deal
Thu, Oct 16 - Thu, Oct 23
Multiple Airlines Logo
12:32 pm - 8:48 amONT-MIA
41h 16m2 stops
Multiple Airlines Logo
7:23 pm - 4:28 pmMIA-ONT
24h 05m1 stop
$250Multiple Airlines
Find Deal
Fri, Oct 24 - Sun, Oct 26
Multiple Airlines Logo
8:34 am - 12:50 pmONT-MIA
25h 16m1 stop
Multiple Airlines Logo
10:51 am - 7:47 amMIA-ONT
23h 56m2 stops
$256Multiple Airlines
Find Deal
Tue, Feb 3 - Tue, Feb 10
Delta Logo
10:30 pm - 11:03 amONT-EYW
9h 33m1 stop
Delta Logo
2:35 pm - 9:14 pmEYW-ONT
9h 39m1 stop
$339Delta
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Tue, Oct 28 - Sat, Nov 1
Delta Logo
7:05 am - 8:06 pmONT-EYW
10h 01m1 stop
Delta Logo
12:22 pm - 9:20 pmEYW-ONT
11h 58m2 stops
$409Delta
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Wed, Jan 7 - Sat, Jan 10
American Airlines Logo
6:41 am - 6:35 pmONT-EYW
8h 54m2 stops
American Airlines Logo
8:10 am - 5:53 pmEYW-ONT
12h 43m2 stops
$464American Airlines
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Mon, Dec 8 - Mon, Dec 15
American Airlines Logo
6:00 am - 4:07 pmONT-EYW
7h 07m1 stop
American Airlines Logo
7:10 am - 6:19 pmEYW-ONT
14h 09m2 stops
$509American Airlines
Find Deal
Sun, Jan 25 - Mon, Feb 2
United Airlines Logo
6:39 pm - 1:03 pmONT-EYW
15h 24m2 stops
United Airlines Logo
6:05 pm - 12:47 pmEYW-ONT
21h 42m2 stops
$743United Airlines
Find Deal
Thu, Nov 13 - Mon, Nov 17
United Airlines Logo
5:05 am - 3:19 pmONT-EYW
31h 14m2 stops
United Airlines Logo
4:00 pm - 8:44 pmEYW-ONT
31h 44m2 stops
$912United Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for Ontario to Florida Keys flights

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

Can I save money by flying with a layover from Ontario to Florida Keys?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $294, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Ontario to Florida Keys?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Florida Keys, 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 Ontario to Florida Keys is September, when tickets cost $348 (return) on average. On the other hand, the most expensive months are December and February, when the average cost of round-trip tickets is $583 and $497 respectively.

What’s the cheapest day of the week to fly from Ontario to Florida Keys?

The average price of all round-trip flights from Ontario to Florida Keys clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Florida Keys on a Wednesday and more expensive on a Friday. On your return trip to Ontario, you should consider flying back on a Thursday, and avoid Sundays for better deals.

How far in advance should I book a flight from Ontario to Florida Keys?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Ontario to Florida Keys, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Ontario to Florida Keys, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 4 weeks before departure.

Good to know

Low seasonSeptember
Cheapest flight$87
Best time to beat the crowds with an average 29% drop in price.
Most popular time to fly with an average 10% 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 from Ontario to Florida Keys 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 from Ontario to Florida Keys with an airline and back 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 from Ontario to Florida Keys up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Florida Keys?

    The cheapest time of day to fly to Florida Keys is generally in the evening, when round-trip flights cost $326 on average. Morning departures are around 20% more expensive than evening flights, on average. The most expensive time of day to fly to Florida Keys is generally in the morning, which is peak travel time and where the average cost of a ticket is $396.

Reviews of the top 5 airlines serving from Ontario to Florida Keys

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Florida Keys. 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 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
SouthwestOverall score based on 4246 reviews
8.0Comfort
8.6Crew
8.1Boarding
7.5Entertainment
7.0Food
Airline reviews

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

10.0 ExcellentRobert, Sep 2025SFO - LAS
Read more Southwest reviews

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

No trays in our seats, we sat in first row, purchased a business class fare. Had to hold our drinks and snack in our hands. No plugs for our cell phones. Had to pay for it a drink cocktail each. Seats so uncomfortable.

Flight wasn’t even full, but too many carry-ons caused us to run out of bin space. New bag fee has folks who would usually check their bags carrying on. Watching Southwest morph into Spirit/Frontier is so sad to watch

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

I'm not a fan of Southwest's model. I don't like the herding style of boarding.

It is southwest seat was ok. Not the most comfortable seat

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

this crew didn't care much. bumping carts into seats more times than i care to remember

Everything was fine except the entertainment was not working for half of the flight.

Easy boarding with an extremely kind attendant. Seats were spacious and we had 3 seats for 2 people so we could stretch out. Comfortable air flow and very attentive and hospital attendants. Bathrooms and food were the only negative. Bathrooms were so small you could hardly get in and close the door. I don’t think an obese person would fit or a person with a movement disability. Food was the trending food for flights, nonexistent. We spent $40 getting sandwich and snack at airport for our 6 hour flught.

My husband upgraded our seats and I don't know if it was due to the type of planet was or if they didn't upgrade our seats. We were supposed to be in I believe comfort seats and they were just as tight as any other seat- no leg room and we are very tall people but at least it wasn't extremely cold. My husband did put in a complaint about our seating because he paid extra and if we would have known that the space and the tightness would have been the same, we just would have gotten the emergency row emergency row seats that we normally get. We love Delta but both our flights coming home we're not good. Oh I forgot to mention that on our flight to Hawaii our luggage wheels got broke and we had to purse new luggage on vacation then we never had this problem so we didn't know protocol and reported it after we got home only for them to tell is we only had 24hrs to report the damage. Not sure what was going on with Delta this vacation trip.

Crew was excellent. Comfort seats not as nice as other kinds of planes.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

There are 4 flights in consecutive gates with about the same departure time. Two flights were boarding at the same time. One was delayed or boarding would be happening at the same time. I am not sure what Delta and LAX need to do to have a better layout at the end of Terminal 2

There was a security issue at the airport and we were unable to land. We circled endlessly and then landed at another airfield for fuel. We then circled the airport again, almost landed but didn’t fully touch down before circling again. I am thankful to the crew for keeping us safe- the issue was the airline and staff at the airport getting us seats on our connecting flights. That part was hours of searching for someone and getting in double my steps.

I was in first class. The outlets at my seat did not work. The plane was shabby and run down. I had prepurchsed a day subscription for internet that was not redeemable. I had to repurchase the internet for my flight and then it didn’t work anyway. Quite disappointed in what was supposed to be the launch of a great vacation.

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

Stuck on tarmac for two hours plus a 5.5 hour flight. Rude flight attendant. And no meals, not even for purchase!

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Boarded plane and then delayed 1.5 hours while on the plane

We didn't take off until an hour after we boarded.

Wish they had the seat-back video screens for watching movies or playing games.

Very good but wish they had the seat-back video screens for movies & games

Flight was delayed not sure why no explanation given and no apologies either. Otherwise the flight was fine

While waiting to claim my checked luggage, I discovered the airline had lost it. After a long wait and inquiries, I discovered it was on another flight. Fortunately, the airline finally sent my luggage home.

Flight delays numerous times. Everytime we would get close to boarding it would be delayed again. Strung along the entire time.

This flight never occurred because AA couldn’t get their act together.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

During service there was a garbage/beverage spill near our seats that never was cleaned up. On a relatively short flight when we’re fortunate enough to actually have in flight movies available, the flight attendants pitching the AADVANTAGE credit card shouldn’t talk for the last 10 minutes of the flight so that we miss the end of the movie.

Waited on the runway for takeoff for 2.5 hours. Air traffic rerouted us. The plane didn't have enough fuel, so had to go back to the gate. Had to wait for a new pilot. Should have landed at 5:22. Didn't land until 9:10. Trash flight.

Frontier is the Walmart of airlines. Frontier has removed adjustability and comfort from their seats to make the flight lighter and save gas. This makes it impossible to sleep on their flights. Their customer service is abysmal. Once, I bought a drink on the plane, and they swiped my credit card on the plane to pay for it. Then I got three weeks of daily notices from my bank telling me they tried to charge the wrong card number over and over again. I tried to call them, but they removed the ability to actually talk to someone that can resolve such a problem from their company to cut corners. The only way to talk to someone in person is to go to the check-in counter at the airport (40 minutes drive from my house). Eventually their system gave up on trying to charge the card, after 21 days of repeated tries. They don't pad their prices even a little to handle customer service issues like missed flights. They also have a blanket policy preventing helping you reschedule a missed flight if their system says you "cancelled" your own flight online. This is a major problem because their website is broken on mobile devices, the only web browser you have at the airport when their gate staff tell you that you have to reschedule your own missed flight online because they can't help you. I tried to reschedule my flight on my android device and instead, their website crashed and "cancelled" my missed flight. When I got to the counter, the agent argued with me for 5 minutes insisting that I intentionally cancelled my own flight (implying I had to buy another flight). She missed the point: the problem was that I could not buy another flight because their website is broken. I left to avoid more conflict with the "customer service" agent. I tried to redress my issue with their only other "customer service" chanel available: the contact form on their website. The response I got was more of the same: you cancelled your own flight, according to our website / computer records, therefore we won't help you. I was trying to explain the problem with their broken website that cost me hundreds of dollars by crashing / malfunctioning and resulting in a cancelled flight, but they only had deaf ears for this problem. Worst customer service I have ever experienced. I will never buy another Frontier flight again, because it is a risky, painful move that I will likely regret often.

I was 2 hr arrive in the airport and 45 min in the line . After take to my turn . The agent tell me I’m later . I can not board . So my vacation was going to the floor . Just for their bad customer service agent in the airline

2 hour delay due to late plane, wrong size plane causing overbooking, and people getting off and on the plane after boarding was completed.

Since you have to pay for overhead bags then they shouldn't be running out of space and asking individuals who paid to remove stuff from the overhead

Book with frontier airlines with the mentality that they'll cancel your flight, kick you off and lose your luggage. Anything besides that is a win. Compare prices with other airlines (to include luggage) and if frontier is still worth it, book it but know all of their policies.

You get what you pay for nothing essentially but a hard uncomfortable seat that doesn’t recline and kids screaming all around you and chaotic boarding and limited check bag weight allowance when compared to other airlines

Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.

I chose the seats when booked the flight and paid for them. However after checking in I found we were assigned different seats!

It was a no frills flight. Would have liked to be able to charge my device

Seats were extremely uncomfortable and it was very hot on the plane.

Everything you need to know for your flight to Florida Keys

Information on your arrival and departure airports

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