ONT - EYW

$275 Find Cheap Flights from Ontario to Key West

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 Key West departing on 11/28. 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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Flight 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

Sun, Feb 1 - 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
$369Delta
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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
$374Delta
Find Deal
Tue, Oct 28 - Sat, Nov 1
Delta Logo
6:00 am - 8:06 pmONT-EYW
11h 06m2 stops
Delta Logo
12:22 pm - 9:20 pmEYW-ONT
11h 58m2 stops
$379Delta
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Thu, Oct 30 - Mon, Nov 3
American Airlines Logo
6:10 am - 4:13 pmONT-EYW
7h 03m1 stop
American Airlines Logo
1:23 pm - 7:41 pmEYW-ONT
9h 18m1 stop
$399American Airlines
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Mon, Dec 8 - Mon, Dec 15
American Airlines Logo
10:34 pm - 1:00 pmONT-EYW
11h 26m2 stops
American Airlines Logo
7:00 am - 1:55 pmEYW-ONT
9h 55m2 stops
$464American Airlines
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Thu, Oct 30 - Mon, Nov 3
American Airlines Logo
7:27 pm - 12:55 pmONT-EYW
14h 28m2 stops
American Airlines Logo
2:39 pm - 9:59 pmEYW-ONT
10h 20m2 stops
$477American Airlines
Find Deal
Mon, Dec 8 - Mon, Dec 15
American Airlines Logo
10:34 pm - 11:02 amONT-EYW
9h 28m2 stops
American Airlines Logo
1:45 pm - 7:39 pmEYW-ONT
8h 54m1 stop
$483American Airlines
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Mon, Nov 10 - Wed, Nov 19
United Airlines Logo
5:05 am - 3:19 pmONT-EYW
31h 14m2 stops
United Airlines Logo
4:00 pm - 10:31 pmEYW-ONT
9h 31m1 stop
$522United Airlines
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Thu, Mar 5 - Mon, Mar 9
United Airlines Logo
6:02 am - 4:08 pmONT-EYW
7h 06m1 stop
United Airlines Logo
4:53 pm - 9:46 pmEYW-ONT
7h 53m1 stop
$544United Airlines
Find Deal
Mon, Mar 16 - Fri, Mar 20
United Airlines Logo
6:02 am - 4:08 pmONT-EYW
7h 06m1 stop
United Airlines Logo
4:53 pm - 12:17 pmEYW-ONT
22h 24m2 stops
$588United Airlines
Find Deal

Everything you should know

Top airlines
Delta
Cheapest • from $369 (round-trip)
American Airlines
Best reviews • 7.2 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$369
Delta
Sun 2/1Tue 2/10
ONT - EYW • 1 stop
Cheapest one-way
$275
Multiple Airlines
Fri 11/28
ONT - EYW • 2 stops
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Key West!
Booking Insights

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 ($369) and American Airlines ($399).

Which airlines fly non-stop between Ontario and Key West?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Ontario to Key West.

There is just one airline that flies from Ontario to Key West direct and that is American Airlines. The best round-trip deal found from American Airlines for the route is $314.

Find deals

Good to know

Low seasonAugust
Cheapest flight$275
Best time to beat the crowds with an average 49% drop in price.
Most popular time to fly and prices are also 18% lower on average.
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 $275 for a one-way ticket and $369 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?

    oneworld is the only airline alliance operating flights between Ontario and Key West.

  • 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 airline 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.
7.2
American AirlinesOverall score based on 11043 reviews
7.2Comfort
6.9Entertainment
7.5Boarding
6.4Food
8.0Crew
Airline reviews

Delays to take off and to leave the plane after landing added a lot of time to this flight.

6.0 GoodMiguel, Oct 2025PHL - MIA
Read more American Airlines reviews

Delays to take off and to leave the plane after landing added a lot of time to this flight.

It was a red eye flight, so no meals were provided, but it was fine with snacks. The seats felt cramped and almost too narrow.

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!

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

Information on your arrival and departure airports

Ontario (ONT)
Key West (EYW)

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