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Florida Keys

$71+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — EYW
Jan 14 — Jan 211
Tue 1/14
Tue 1/21
1 adult, Economy
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Cheap flight deals from Ontario to Florida Keys

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Florida Keys (zzEOA). 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 9, 2025.

Round-trip from

$130
(Frontier)

One-way from

$71
(Frontier)
From Ontario to Florida Keys
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One-way flight from Ontario to Florida Keys
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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 January 9, 2025.

This Frontier deal was found by Cheapflights users on 1/7. 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.
Sat 2/228:09 pmONT - MIA
1 stop11h 44mFrontier
Thu 2/271:29 pmMIA - ONT
1 stop8h 29mFrontier
Deal found 1/7$130
This eDestinos deal was found by Cheapflights users on 1/8. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/39:36 pmONT - MIA
1 stop21h 11mMultiple Airlines
Thu 2/66:14 pmMIA - ONT
1 stop26h 14mMultiple Airlines
Deal found 1/8$157
This Alaska Airlines deal was found by Cheapflights users on 1/8. 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.
Mon 2/37:00 amONT - MIA
1 stop32h 15mAlaska Airlines
Thu 2/67:15 pmMIA - ONT
2 stops25h 58mAlaska Airlines
Deal found 1/8$328
This Delta deal was found by Cheapflights users on 1/8. 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 2/185:10 pmONT - MIA
1 stop10h 13mDelta
Thu 2/276:00 amMIA - ONT
1 stop8h 55mDelta
Deal found 1/8$331
This American Airlines deal was found by Cheapflights users on 1/9. 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 2/810:00 amONT - MIA
2 stops8h 32mAmerican Airlines
Sat 2/155:18 amMIA - ONT
1 stop7h 43mAmerican Airlines
Deal found 1/9$336
This Trip.com deal was found by Cheapflights users on 1/8. 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.
Mon 3/3112:59 amONT - EYW
2 stops29h 16mMultiple Airlines
Sun 4/66:00 pmEYW - ONT
2 stops27h 58mMultiple Airlines
Deal found 1/8$345
This United Airlines deal was found by Cheapflights users on 1/8. 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 1/316:00 amONT - EYW
1 stop7h 01mUnited Airlines
Thu 2/64:50 pmEYW - ONT
1 stop8h 07mUnited Airlines
Deal found 1/8$410
This American Airlines deal was found by Cheapflights users on 1/8. 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 2/116:00 amONT - EYW
1 stop7h 25mAmerican Airlines
Fri 3/213:07 pmEYW - ONT
1 stop8h 46mAmerican Airlines
Deal found 1/8$444
This Delta deal was found by Cheapflights users on 1/8. 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 1/297:05 amONT - EYW
1 stop7h 16mDelta
Mon 2/33:03 pmEYW - ONT
1 stop10h 49mDelta
Deal found 1/8$699

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 January 9, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 2/22

8:09 pm-10:53 am

1 stop11h 44m

Miami

Thu 2/27

1:29 pm-6:58 pm

1 stop8h 29m

$130

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 2/3

9:36 pm-9:47 pm

1 stop21h 11m

Miami

Thu 2/6

6:14 pm-5:28 pm

1 stop26h 14m

$157

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Mon 2/3

7:00 am-6:15 pm

1 stop32h 15m

Miami

Thu 2/6

7:15 pm-6:13 pm

2 stops25h 58m

$328

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/18

5:10 pm-6:23 am

1 stop10h 13m

Miami

Thu 2/27

6:00 am-11:55 am

1 stop8h 55m

$331

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Sat 2/8

12:48 pm-12:46 am

2 stops8h 58m

Miami

Thu 2/13

6:40 pm-11:53 pm

1 stop8h 13m

$336

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Mon 3/31

12:59 am-9:15 am

2 stops29h 16m

Key West

Sun 4/6

6:00 pm-6:58 pm

2 stops27h 58m

$345

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Tue 2/18

11:30 am-9:35 pm

1 stop7h 05m

Miami

Tue 2/25

7:05 am-3:05 pm

2 stops11h 00m

$364

OntarioMiami

ONT - MIA

ONTMIA

Ontario

Thu 2/6

5:10 am-10:15 pm

2 stops14h 05m

Miami

Thu 2/13

4:52 pm-9:59 pm

1 stop8h 07m

$365

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Fri 1/31

6:00 am-4:01 pm

1 stop7h 01m

Key West

Thu 2/6

4:50 pm-9:57 pm

1 stop8h 07m

$410

OntarioKey West

ONT - EYW

ONTEYW

Ontario

Tue 2/11

6:00 am-4:25 pm

1 stop7h 25m

Key West

Fri 3/21

3:07 pm-8:53 pm

1 stop8h 46m

$444

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/8

Showing 1-10 of 19 results
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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 $534). 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 January 9, 2025.
Read reviews from past customers who have flown Frontier, 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
4,650 reviews

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

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
4,650 reviews
Southwest
8.1
Very good
4,650 reviews

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

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
9,635 reviews
Southwest
8.1
Very good
4,650 reviews

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

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
8,501 reviews
Southwest
8.1
Very good
4,650 reviews

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

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
8,942 reviews
Southwest
8.1
Very good
4,650 reviews

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

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

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,650 reviews

Crew

8.7

Overall

8.1

Comfort

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

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 ($71), Alaska Airlines ($161), and Delta ($166).

  • 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 $534). 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 January 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$308Average$468FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$382Average$530FlexibilityNo cancel feeOn-time71%
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