ONT - EYW

$309 Find Cheap Flights from Ontario to Key West

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Key West departing on 8/23. 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 Key West

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

Cheap Flights from Ontario to Key West (ONT-EYW)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Key West 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 Key West

Sat, Aug 23 - Tue, Aug 26
Delta Logo
7:05 am - 5:12 pmONT-EYW
7h 07m1 stop
Delta Logo
2:00 pm - 7:11 pmEYW-ONT
8h 11m1 stop
$309Delta
Find Deal
Sat, Aug 23 - Tue, Aug 26
Delta Logo
7:05 am - 8:12 pmONT-EYW
10h 07m1 stop
Delta Logo
7:00 am - 5:11 pmEYW-ONT
13h 11m2 stops
$314Delta
Find Deal
Sat, Aug 23 - Tue, Aug 26
Delta Logo
6:05 am - 8:12 pmONT-EYW
11h 07m2 stops
Delta Logo
7:00 am - 5:11 pmEYW-ONT
13h 11m2 stops
$319Delta
Find Deal
Sat, Aug 23 - Tue, Aug 26
American Airlines Logo
11:59 pm - 12:58 pmONT-EYW
9h 59m2 stops
American Airlines Logo
1:13 pm - 10:48 pmEYW-ONT
12h 35m2 stops
$419American Airlines
Find Deal
Mon, Sep 15 - Fri, Sep 19
American Airlines Logo
10:35 pm - 11:13 amONT-EYW
9h 38m1 stop
American Airlines Logo
7:31 pm - 11:55 amEYW-ONT
19h 24m2 stops
$497American Airlines
Find Deal
Mon, Sep 15 - Fri, Sep 19
American Airlines Logo
10:35 pm - 10:54 amONT-EYW
9h 19m2 stops
American Airlines Logo
7:31 pm - 11:56 amEYW-ONT
19h 25m2 stops
$502American Airlines
Find Deal
Mon, Aug 11 - Fri, Aug 15
United Airlines Logo
1:19 pm - 1:26 pmONT-EYW
21h 07m2 stops
United Airlines Logo
2:12 pm - 5:25 pmEYW-ONT
30h 13m2 stops
$608United Airlines
Find Deal
Sun, Sep 21 - Fri, Sep 26
United Airlines Logo
6:00 am - 2:55 pmONT-EYW
29h 55m2 stops
United Airlines Logo
3:11 pm - 12:51 pmEYW-ONT
24h 40m2 stops
$693United Airlines
Find Deal
Fri, Sep 5 - Sat, Sep 13
United Airlines Logo
1:42 pm - 2:11 pmONT-EYW
21h 29m2 stops
United Airlines Logo
3:05 pm - 12:13 pmEYW-ONT
24h 08m2 stops
$717United Airlines
Find Deal
Wed, Jul 16 - Sun, Jul 20
American Airlines Logo
6:10 am - 7:21 pmONT-EYW
10h 11m2 stops
American Airlines Logo
2:44 pm - 9:38 pmEYW-ONT
9h 54m1 stop
$879American Airlines
Find Deal
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KAYAK's insights & trends for Ontario to Key West flights

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

Which airlines provide the cheapest flights from Ontario to Key West?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Ontario to Key West were found on Delta ($309) and American Airlines ($419).

Good to know

Cheapest flight$309
Flight from Ontario to Key West

When to book flights from Ontario to Key West

Are your dates flexible? Find out the best times to travel from Ontario to Key West 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 Ontario to Key West

  • What is the cheapest flight from Ontario to Key West?

    In the last 3 days, the lowest price for a flight from Ontario to Key West was $382 for a one-way ticket and $309 for a round-trip.

  • Do I need a passport to fly between Ontario and Key West?

    No

  • Which aircraft models fly most regularly from Ontario to Key West?

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

  • Which airline alliances offer flights from Ontario to Key West?

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

  • Which is the best airline for flights from Ontario to Key West, Delta or American Airlines?

    The two airlines most popular with KAYAK users for flights from Ontario to Key West are Delta and American Airlines. With an average price for the route of $398 and an overall rating of 8.0, Delta is the most popular choice. American Airlines is also a great choice for the route, with an average price of $423 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from Ontario to Key West?

    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 Key West.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Key West 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 Key West?

    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 Key West with an airline and back to Ontario with another airline. Booking your flights between Ontario and EYW 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 Ontario to Key West?

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

Reviews of the top airlines flying from Ontario to Key West

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Key West. 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 Key West? 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 7973 reviews
7.9Entertainment
7.3Food
8.5Crew
7.9Comfort
8.2Boarding
Airline reviews

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

10.0 ExcellentMary, Jun 2025SAN - ATL
Read more Delta reviews

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.

Most aspects were good however if they assign boarding zones they ought to enforce them or why bother? My luggage from SAN-JFK-MAD was lost in NY so I without my main bag for two days upon arrival in Spain. They were helpful in tracking it and eventually delivered it to my hotel. The flub was because of a delay upon arrival in NYC. I had booked 2 1/2 hours between flights but we had to hold on the taxiway for an hour after landing while waiting for a clear gate which likely caused the baggage error.

Excellent flight, the planes were newer, they did a nice job with boarding, great service overall.

It would be nice if was given wires ear buds. Overall was a good experience was able to sleep on the plane

I am very bothered by the events today. I can't believe the flight attendants allowed someone to take my seat and made me move. It was embarrassing. I was in the right. The lady just didn't want move. I can't believe delta would allow this to stand and disrespect my rights as a passenger. The lady complained about her leg and that she couldn't move. Firstly somehow she was able to make it to row 24. Not sure how much her leg could have hurt. Secondly, I'm in plenty of pain myself. I just finished chemotherapy a several weeks ago. My body is constantly sore. Yet deltas flight attendants didn't appropriately protect my rights. In the end they found me a seat on the plane but I want to understand how delta can operate this way. They in essence allowed a bully to get their way.

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

Crew was friendly Love the entertainment in the seat head rest.

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.

The boarding was pretty easy. However, the first class seats are not lay flat as other airlines (like JetBlue) has and therefore sleeping was a challenge.

Everything about the flight was lovely…We left early, arrived early, cabin crew were efficient and helpful. Flight was easy and most pleasant.

Would have thought that they would gas up plane before everyone got on board

Fine. On time, cabin service was fine, bag arrived. All good. Flying into DCA so did not collide with any helicopters, which is also good. Horrid incident that could have and should have been prevented.

Standard. No different than a discount carrier on a short trip.

The flights were terribly delayed and then cancelled which forced us booking another night at the hotel. Very poor management from American Airlines

Everything you need to know for your flight from Ontario to Key West

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