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Key West

$149+ 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 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — EYW
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$309
(American Airlines)

One-way from

$149
(Delta)

Popular in

August

Cheapest in

January

Average price

$412
From Ontario to Key West
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One-way flight from Ontario to Key West
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Highest demand for flights based on searches. 0% potential increase in price ($0 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/11. 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.
Tue 10/286:10 amONT - EYW
1 stop7h 08mAmerican Airlines
Wed 11/51:23 pmEYW - ONT
1 stop9h 18mAmerican Airlines
Deal found 9/11$309
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Fri 9/2610:35 pmONT - EYW
1 stop9h 38mAmerican Airlines
Tue 9/303:45 pmEYW - ONT
1 stop8h 39mAmerican Airlines
Deal found 9/11$369
This Delta deal was found by Cheapflights users on 9/9. 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.
Tue 9/237:05 amONT - EYW
1 stop7h 07mDelta
Tue 9/306:10 pmEYW - ONT
1 stop7h 13mDelta
Deal found 9/9$399
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 9/2710:35 pmONT - EYW
1 stop10h 30mAmerican Airlines
Wed 10/13:45 pmEYW - ONT
1 stop8h 39mAmerican Airlines
Deal found 9/9$439
This Delta deal was found by Cheapflights users on 9/11. 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.
Tue 10/147:05 amONT - EYW
1 stop10h 01mDelta
Thu 10/236:00 pmEYW - ONT
1 stop7h 22mDelta
Deal found 9/11$458
This Delta deal was found by Cheapflights users on 9/11. 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.
Wed 10/157:05 amONT - EYW
1 stop10h 01mDelta
Wed 10/221:57 pmEYW - ONT
1 stop8h 22mDelta
Deal found 9/11$488
This American Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 9/176:10 amONT - EYW
2 stops9h 49mAmerican Airlines
Wed 9/243:45 pmEYW - ONT
1 stop8h 39mAmerican Airlines
Deal found 9/9$513

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 September 11, 2025.
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

Tue 10/28

6:10 am-4:18 pm

1 stop7h 08m

Key West

Wed 11/5

1:23 pm-7:41 pm

1 stop9h 18m

$309

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Fri 9/26

10:35 pm-11:13 am

1 stop9h 38m

Key West

Tue 9/30

3:45 pm-9:24 pm

1 stop8h 39m

$369

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 9/24

7:05 am-5:12 pm

1 stop7h 07m

Key West

Tue 9/30

6:10 pm-10:23 pm

1 stop7h 13m

$399

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Tue 9/23

7:05 am-5:12 pm

1 stop7h 07m

Key West

Tue 9/30

6:10 pm-10:23 pm

1 stop7h 13m

$399

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Sat 9/27

10:35 pm-12:05 pm

1 stop10h 30m

Key West

Wed 10/1

3:45 pm-9:24 pm

1 stop8h 39m

$439

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Tue 10/14

7:05 am-8:06 pm

1 stop10h 01m

Key West

Thu 10/23

6:00 pm-10:22 pm

1 stop7h 22m

$458

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Fri 10/31

7:05 am-8:06 pm

1 stop10h 01m

$149

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 10/29

7:05 am-5:12 pm

1 stop7h 07m

$299

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Wed 10/29

6:10 am-7:22 pm

2 stops10h 12m

$354

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Thu 10/30

7:05 am-8:06 pm

1 stop10h 01m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/8

Showing 1-10 of 13 results
1
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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, August is the cheapest month in which you can book a flight from Ontario to Key West (average of $328). Flying from Ontario to Key West in March is currently the most expensive (average of $491). 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 September 11, 2025.
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
10,000 reviews

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Andrew,May 2025

LAX - MIA

2 hour delay. Discovered an engine problem late, we boarded the plane and they asked us to come off. To add insult to injury nothing was given to passengers to make amends. No free drink. No extra food or snacks. No free WiFi. Gimme a break
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Food

6.4

Boarding

7.5

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Andrew,May 2025

LAX - MIA

2 hour delay. Discovered an engine problem late, we boarded the plane and they asked us to come off. To add insult to injury nothing was given to passengers to make amends. No free drink. No extra food or snacks. No free WiFi. Gimme a break

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 $399, American Airlines can have you in Key West from Ontario in 7h 07m. 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 $318, was found to be the cheapest airline from Ontario to Key West..

  • 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, August is the cheapest month in which you can book a flight from Ontario to Key West (average of $328). Flying from Ontario to Key West in March is currently the most expensive (average of $491). 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$318Average$423FlexibilityNo cancel feeOn-time71%

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