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Key West

$353+ Cheap flights from Ontario to Key West (ONT - EYW)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — EYW
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Ontario to Key West

Cheapest flights from Ontario to Key West
Explore the most affordable flight options available from Ontario to Key West. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/226:00 am
ONT
-
EYW
1 stop7h 24m
American Airlines
Tue 3/312:55 pm
EYW
-
ONT
1 stop9h 50m
American Airlines
Deal found 1/27$461
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/711:59 pm
ONT
-
EYW
2 stops12h 41m
American Airlines
Thu 5/142:01 pm
EYW
-
ONT
1 stop10h 05m
American Airlines
Deal found 1/27$488
This Delta deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/2210:20 pm
ONT
-
EYW
1 stop9h 39m
Delta
Tue 3/32:46 pm
EYW
-
ONT
1 stop9h 19m
Delta
Deal found 1/27$597
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/216:00 am
ONT
-
EYW
1 stop6h 53m
United Airlines
Wed 2/253:56 pm
EYW
-
ONT
2 stops31h 54m
United Airlines
Deal found 1/28$630
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:59 pm
ONT
-
EYW
1 stop9h 02m
American Airlines
Thu 3/122:06 pm
EYW
-
ONT
1 stop10h 18m
American Airlines
Deal found 1/27$705
This United Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/146:00 am
ONT
-
EYW
1 stop7h 02m
United Airlines
Mon 5/184:47 pm
EYW
-
ONT
1 stop8h 11m
United Airlines
Deal found 1/27$787

Find flight deals from Ontario to Key West

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Key West (EYW). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$461
(American Airlines)

One-way from

$353
(Delta)

Popular in

November

Cheapest in

August

Average price

$368
Provider with most accurate pricing for Ontario-Key West flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Key West flights.
Search Deals
From Ontario to Key West
Search Deals
One-way flight from Ontario to Key West
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($111 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($32 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Key West that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Ontario to Key West that are best for you.

Fly from

Ontario

Fly to

Key West

Route

Depart

Return

Price

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sun 2/22

6:00 am-4:24 pm

1 stop7h 24m

Key West

Tue 3/3

12:55 pm-7:45 pm

1 stop9h 50m

$461

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Thu 5/7

11:59 pm-3:40 pm

2 stops12h 41m

Key West

Thu 5/14

2:01 pm-9:06 pm

1 stop10h 05m

$488

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sun 2/22

10:20 pm-10:59 am

1 stop9h 39m

Key West

Tue 3/3

2:46 pm-9:05 pm

1 stop9h 19m

$597

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 2/21

6:00 am-3:53 pm

1 stop6h 53m

Key West

Wed 2/25

3:56 pm-8:50 pm

2 stops31h 54m

$630

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 3/9

11:59 pm-12:01 pm

1 stop9h 02m

Key West

Thu 3/12

2:06 pm-9:24 pm

1 stop10h 18m

$705

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 2/28

10:20 pm-10:59 am

1 stop9h 39m

$353

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Fri 2/27

10:20 pm-10:59 am

1 stop9h 39m

$408

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Compare providers for flights from Ontario to Key West

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Key West in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Key West flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Key West flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Key West flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Key West flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Key West flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Key West

Have a flexible travel schedule? Discover the best time to fly to Key West from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

What is the cheapest month to book a flight from Ontario to Key West?

Currently, September is the cheapest month in which you can book a flight from Ontario to Key West (average of $250). Flying from Ontario to Key West in June is currently the most expensive (average of $436). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Key West

Get insights into the airlines that provide service to Key West. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Key West. Reviews last updated January 29, 2026.
Read through reviews of airlines operating flights from Ontario to Key West, such as American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,205 reviews

Food

6.4

Boarding

7.5

Comfort

7.2

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,205 reviews
American Airlines
7.2
Good
11,205 reviews

Food

6.4

Boarding

7.5

Comfort

7.2

Overall

7.2

Crew

8.0

Entertainment

6.9

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Key West. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Key West?

    For as low as $461, American Airlines can have you in Key West from Ontario in 7h 24m. Airlines will cover a distance of 2242 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Ontario to Key West round-trip?

    American Airlines, at $314, was found to be the cheapest airline from Ontario to Key West.. American Airlines is priced at 46% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Ontario to Key West that include hotel bookings?

    Yes. In addition to deals on Ontario to Key West flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Key West?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Key West.

  • Can I find deals for business class flights from Ontario to Key West?

    Yes. Cheapflights offers flight deals from Ontario to Key West by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, September is the cheapest month in which you can book a flight from Ontario to Key West (average of $250). Flying from Ontario to Key West in June is currently the most expensive (average of $436). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top airline flying from Ontario to Key West

Discover the top airline that operate flights from Ontario to Key West. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$314Average$689FlexibilityNo cancel feeOn-time71%

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