$160 Cheap Flights from Ontario (ONT) to Key West (EYW)

View $160 flight on Sat, Jan 17, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW)

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

Prices were available within the past 7 days and start at $160 for one-way flights and $309 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Apr 25 - Thu, Apr 30
ONT
Ontario
EYW
Key West
$309 Roundtrip, found 1 day ago
$309
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Apr 25 from Ontario to Key West, returning Thu, Apr 30, priced at $309 found 1 day ago
American Airlines
Sat, Feb 7 - Wed, Feb 11
ONT
Ontario
EYW
Key West
$314 Roundtrip, found 3 days ago
$314
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Feb 7 from Ontario to Key West, returning Wed, Feb 11, priced at $314 found 3 days ago
American Airlines
Sat, Feb 7 - Wed, Feb 11
ONT
Ontario
EYW
Key West
$319 Roundtrip, found 3 days ago
$319
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Feb 7 from Ontario to Key West, returning Wed, Feb 11, priced at $319 found 3 days ago
Delta
Sat, Feb 7 - Sun, Feb 8
ONT
Ontario
EYW
Key West
$333 Roundtrip, found 2 days ago
$333
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Feb 7 from Ontario to Key West, returning Sun, Feb 8, priced at $333 found 2 days ago
Delta
Sun, Apr 5 - Wed, Apr 15
ONT
Ontario
EYW
Key West
$339 Roundtrip, found 1 day ago
$339
Roundtrip
found 1 day ago
Select Delta flight, departing Sun, Apr 5 from Ontario to Key West, returning Wed, Apr 15, priced at $339 found 1 day ago
Delta
Wed, Feb 4 - Thu, Feb 19
ONT
Ontario
EYW
Key West
$344 Roundtrip, found 2 days ago
$344
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Feb 4 from Ontario to Key West, returning Thu, Feb 19, priced at $344 found 2 days ago
American Airlines
Sat, Dec 13 - Wed, Dec 17
ONT
Ontario
EYW
Key West
$356 Roundtrip, found 1 day ago
$356
Roundtrip
found 1 day ago
Select American Airlines flight, departing Sat, Dec 13 from Ontario to Key West, returning Wed, Dec 17, priced at $356 found 1 day ago
American Airlines
Sat, Feb 7 - Wed, Feb 11
ONT
Ontario
EYW
Key West
$358 Roundtrip, found 3 days ago
$358
Roundtrip
found 3 days ago
Select American Airlines flight, departing Sat, Feb 7 from Ontario to Key West, returning Wed, Feb 11, priced at $358 found 3 days ago
United
Sat, Feb 28 - Mon, Mar 9
ONT
Ontario
EYW
Key West
$409 Roundtrip, found 4 days ago
$409
Roundtrip
found 4 days ago
Select United flight, departing Sat, Feb 28 from Ontario to Key West, returning Mon, Mar 9, priced at $409 found 4 days ago
Alaska Airlines
Thu, Apr 30 - Tue, May 5
ONT
Ontario
EYW
Key West
$828 Roundtrip, found 7 hours ago
$828
Roundtrip
found 7 hours ago
Select Alaska Airlines flight, departing Thu, Apr 30 from Ontario to Key West, returning Tue, May 5, priced at $828 found 7 hours ago

Find the cheapest month to fly from Ontario (ONT) to Key West (EYW)

September is typically the cheapest month to fly

From $308 - $667 per traveler.

Alternative airports near Key West

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Key West Intl. EYW. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $893
EYW
Key West Intl.
CheapestClosest
Average driving time to city center8 min
Flights from $893
Flights from Ontario (ONT) to Key West (EYW)
Origin airport
Los Angeles - Ontario Intl.
Destination airport
Key West Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
$308
Distance
2243 mi

Ontario to Key West Flights

The cheapest times to fly from Ontario to Key West

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Ontario to Key West are during the month of April. You can find some of the cheapest flights from Ontario to Key West with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Ontario to Key West

Sunday is one of the best days to book for cheap flights from Ontario to Key West: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Ontario to Key West

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Ontario to Key West in 2025. You can also book with separate airlines for your outbound and return journeys, from $160 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Ontario to Key West flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Ontario to Key West airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW) cost?
Get a cheap one-way flight from $160 or cheap return flight from $309 from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW)?
The cheapest month to fly from ONT to EYW is April, when demand is low. Off-peak season is usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW)?
To find the cheapest airline flying from ONT to EYW, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW)?
You'll need to take a flight with a layover if you're traveling from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from ONT to EYW?
You'll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW)?
Select a flight from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW) last-minute?
Booking your flight from ONT to EYW right before your trip is typically more expensive. However, if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an ONT to EYW flight and hotel package?
Opting for an ONT to EYW flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our extensive range of accommodations and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Los Angeles - Ontario Intl. Airport (ONT) to Key West Intl. Airport (EYW)?
Usually, it's possible to reschedule or cancel your ONT to EYW flight. However, if the booking was made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.