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Florida Keys

$65+ Cheap flights from Ontario (ONT) to Florida Keys

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 4/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — EYW
Feb 27 — Mar 61
Thu 2/27
Thu 3/6
1 adult, Economy
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Cheap flight deals from Ontario to Florida Keys

Keep the following information in mind while searching for Ontario to Florida Keys flight deals. Data was last updated February 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$299
(Booking.com)

One-way from

$65
(Cheapflightsfares)

Popular in

December

Cheapest in

August

Average price

$395
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From Ontario to Florida Keys
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One-way flight from Ontario to Florida Keys
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Highest demand for flights based on searches. 17% potential increase in price ($82 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Ontario to Florida Keys

Cheapest flights from Ontario to Florida Keys
Explore the most affordable flight options available from Ontario to Florida Keys. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2025.

This Frontier deal was found by Cheapflights users on 2/21. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1112:16 pmONT - MIA
1 stop14h 06mFrontier
Sun 5/187:22 amMIA - ONT
1 stop9h 23mFrontier
Deal found 2/21$302
This Delta deal was found by Cheapflights users on 2/21. 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 3/2512:46 pmONT - MIA
1 stop8h 59mDelta
Wed 3/267:10 amMIA - ONT
1 stop7h 26mDelta
Deal found 2/21$337
This Trip.com deal was found by Cheapflights users on 2/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/272:43 pmONT - EYW
2 stops22h 02mMultiple Airlines
Mon 3/317:40 pmEYW - ONT
2 stops46h 24mMultiple Airlines
Deal found 2/19$353
This Alaska Airlines deal was found by Cheapflights users on 2/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/156:00 amONT - MIA
2 stops33h 47mAlaska Airlines
Wed 3/196:02 pmMIA - ONT
1 stop32h 57mAlaska Airlines
Deal found 2/21$368
This American Airlines deal was found by Cheapflights users on 2/21. 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 3/2012:49 pmONT - MIA
1 stop6h 49mAmerican Airlines
Wed 3/267:19 amMIA - ONT
1 stop7h 40mAmerican Airlines
Deal found 2/21$369
This American Airlines deal was found by Cheapflights users on 2/21. 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 4/86:00 amONT - EYW
1 stop7h 16mAmerican Airlines
Sat 4/128:00 amEYW - ONT
2 stops13h 29mAmerican Airlines
Deal found 2/21$379
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Fri 3/216:45 pmONT - MIA
1 stop9h 21mUnited Airlines
Fri 3/281:05 pmMIA - ONT
2 stops12h 40mUnited Airlines
Deal found 2/21$392
This Delta deal was found by Cheapflights users on 2/21. 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 3/47:05 amONT - EYW
1 stop7h 14mDelta
Sat 3/87:00 amEYW - ONT
1 stop8h 00mDelta
Deal found 2/21$414
This Southwest deal was found by Cheapflights users on 2/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/315:40 amONT - MIA
2 stops9h 00mSouthwest
Thu 4/36:45 amMIA - ONT
1 stop10h 10mSouthwest
Deal found 2/20$467
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Mon 3/246:00 amONT - EYW
1 stop7h 08mUnited Airlines
Thu 3/274:55 pmEYW - ONT
1 stop8h 04mUnited Airlines
Deal found 2/20$540
This Alaska Airlines deal was found by Cheapflights users on 2/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/87:00 amONT - EYW
3 stops25h 41mAlaska Airlines
Sat 4/1212:16 pmEYW - ONT
3 stops24h 12mAlaska Airlines
Deal found 2/21$1,093

Find flights from Ontario to Florida Keys within your budget

Customize your flight search to find flights from Ontario to Florida Keys 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 February 22, 2025.

Fly from

Ontario

Fly to

Florida Keys

Route

Depart

Return

Price

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sun 5/11

12:16 pm-5:22 am

1 stop14h 06m

Miami

Sun 5/18

7:22 am-1:45 pm

1 stop9h 23m

$302

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 3/25

12:46 pm-12:45 am

1 stop8h 59m

Miami

Fri 3/28

6:10 pm-10:43 pm

1 stop7h 33m

$337

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Thu 3/27

2:43 pm-3:45 pm

2 stops22h 02m

Key West

Mon 3/31

7:40 pm-3:04 pm

2 stops46h 24m

$353

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 3/15

6:00 am-6:47 pm

2 stops33h 47m

Miami

Wed 3/19

6:02 pm-11:59 pm

1 stop32h 57m

$368

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Thu 3/20

12:49 pm-10:38 pm

1 stop6h 49m

Miami

Wed 3/26

7:19 am-11:59 am

1 stop7h 40m

$369

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Tue 4/8

6:00 am-4:16 pm

1 stop7h 16m

Key West

Sat 4/12

8:00 am-6:29 pm

2 stops13h 29m

$379

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Fri 3/21

6:45 pm-7:06 am

1 stop9h 21m

Miami

Fri 3/28

1:05 pm-10:45 pm

2 stops12h 40m

$392

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Tue 3/4

7:05 am-5:19 pm

1 stop7h 14m

Key West

Sat 3/8

7:00 am-12:00 pm

1 stop8h 00m

$414

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 3/31

5:40 am-5:40 pm

2 stops9h 00m

Miami

Thu 4/3

6:45 am-1:55 pm

1 stop10h 10m

$467

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 5/27

10:40 pm-1:06 pm

1 stop11h 26m

Miami

Thu 5/29

2:01 pm-9:22 pm

1 stop10h 21m

$536

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/21

Showing 1-10 of 23 results
1
2
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Best time to book a flight from Ontario to Florida Keys

Have a flexible travel schedule? Discover the best time to fly to Florida Keys 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.

Travel insights for flights from Ontario to Florida Keys

Get recent, data-driven insights about flights from Ontario to Florida Keys including ideal travel times, pricing trends, and more.

What is the cheapest month to book a flight from Ontario to Florida Keys?

Currently, August is the cheapest month in which you can book a flight from Ontario to Florida Keys (average of $328). Flying from Ontario to Florida Keys in March is currently the most expensive (average of $510). 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.

Rainfall in Florida Keys by month

Plan your trip to Florida Keys by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Florida Keys ranges from 1.6 - 9.9 inches per month. September is typically the wettest month, when rainfall can reach 9.9 in. January is typically the driest time to visit Florida Keys when rainfall is around 1.6 in.

Temperature in Florida Keys by month

Plan your trip to Florida Keys by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Florida Keys, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 68.0 F).

Reviews of airlines servicing Florida Keys

Get insights into the airlines that provide service to Florida Keys. 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 Florida Keys. Reviews last updated February 22, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from Ontario to Florida Keys. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,401 reviews

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,401 reviews
Southwest
8.1
Very good
4,401 reviews

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,700 reviews
Southwest
8.1
Very good
4,401 reviews

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,212 reviews
Southwest
8.1
Very good
4,401 reviews

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

JetBlue
7.4
Good
3,069 reviews
Southwest
8.1
Very good
4,401 reviews

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
8,759 reviews
Southwest
8.1
Very good
4,401 reviews

Entertainment

7.6

Crew

8.7

Comfort

8.1

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

10.0
Excellent

Arlene,May 2024

SAN - OAK

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Related info for your journey

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

  • What airport do you fly from for flights from Ontario to Florida Keys?

    Located just 3.1 mi from the city center, Ontario (ONT) is the airport most travelers will use when flying to Florida Keys from Ontario.

  • What are the cheapest airlines to fly from Ontario to Florida Keys one-way?

    The cheapest airlines for a one-way flight from Ontario to Florida Keys are Frontier ($65), JetBlue ($136), and Alaska Airlines ($137).

  • Can I find deals for flights from Ontario to Florida Keys that include hotel bookings?

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

  • How can I find direct flights from Ontario to Florida Keys?

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

  • Can I find deals for business class flights from Ontario to Florida Keys?

    Yes. Cheapflights offers flight deals from Ontario to Florida Keys 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 Florida Keys?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Florida Keys (average of $328). Flying from Ontario to Florida Keys in March is currently the most expensive (average of $510). 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.

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Top 2 airlines flying from Ontario to Florida Keys

Discover the top 2 airlines that operate flights from Ontario to Florida Keys. 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 February 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$468FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$393Average$533FlexibilityNo cancel feeOn-time71%
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