$61+ 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 3/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — EYW
Mar 15 — Mar 221
1 adult, Economy
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Find cheap flights from Ontario to Florida Keys with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Florida Keys
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Cheapest flights from Ontario to Florida KeysExplore 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 13, 2026.
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 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Wed 4/297:50 am
MIA
- ONT
1 stop19h 05m
Frontier
Deal found 2/11![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Tue 4/287:50 am
MIA
- ONT
1 stop19h 05m
Frontier
Deal found 2/10![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Sat 4/256:30 am
MIA
- ONT
1 stop20h 25m
Frontier
Deal found 2/10![Frontier logo]()
$155
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/227:29 pm
ONT
- MIA
1 stop9h 03m
Frontier
Tue 4/287:50 am
MIA
- ONT
1 stop19h 05m
Frontier
Deal found 2/11![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:18 pm
ONT
- MIA
1 stop9h 14m
Frontier
Tue 4/287:50 am
MIA
- ONT
1 stop19h 05m
Frontier
Deal found 2/11![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Mon 4/207:04 pm
MIA
- ONT
2 stops31h 51m
Frontier
Deal found 2/10![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:29 pm
ONT
- MIA
1 stop9h 03m
Frontier
Thu 4/308:42 am
MIA
- ONT
1 stop14h 22m
Frontier
Deal found 2/10![Frontier logo]()
$174
This Trip.com deal was found by Cheapflights users on 2/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:33 pm
ONT
- MIA
1 stop8h 32m
Frontier
Tue 4/287:50 am
MIA
- ONT
1 stop19h 05m
Frontier
Deal found 2/11![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/2311:44 am
ONT
- MIA
1 stop16h 48m
Frontier
Mon 4/278:42 am
MIA
- ONT
1 stop14h 22m
Frontier
Deal found 2/10![Frontier logo]()
$176
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2812:59 am
ONT
- MIA
2 stops20h 50m
Frontier
Mon 5/48:42 am
MIA
- ONT
1 stop14h 22m
Frontier
Deal found 2/10![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2012:59 am
ONT
- MIA
2 stops16h 51m
Multiple Airlines
Tue 4/288:42 am
MIA
- ONT
1 stop12h 52m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$178
This Delta deal was found by Cheapflights users on 2/10. 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.
Thu 11/267:00 am
ONT
- EYW
1 stop9h 43m
Delta
Tue 12/12:35 pm
EYW
- ONT
1 stop10h 39m
Delta
Deal found 2/10![Delta logo]()
$459
Best flights from Ontario to Florida KeysDiscover carefully curated flight deals from Ontario to Florida Keys that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from Ontario to Florida Keys that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This Frontier deal was found by Cheapflights users on 2/12. 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.
Thu 5/78:26 am
ONT
- MIA
1 stop6h 42m
Frontier
Mon 5/1111:34 am
MIA
- ONT
1 stop8h 04m
Frontier
Deal found 2/12![Frontier logo]()
$200
This United Airlines deal was found by Cheapflights users on 2/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/166:37 pm
ONT
- MIA
1 stop9h 50m
United Airlines
Mon 3/234:10 pm
MIA
- ONT
1 stop9h 08m
United Airlines
Deal found 2/9![United Airlines logo]()
$327
This Delta deal was found by Cheapflights users on 2/11. 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 4/812:57 pm
ONT
- MIA
1 stop8h 55m
Delta
Sat 4/186:00 am
MIA
- ONT
1 stop8h 36m
Delta
Deal found 2/11![Delta logo]()
$331
This Mytrip deal was found by Cheapflights users on 2/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:20 am
ONT
- MIA
1 stop20h 29m
Frontier
Wed 4/158:42 am
MIA
- ONT
1 stop7h 58m
Frontier
Deal found 2/9![Frontier logo]()
$206
This Trip.com deal was found by Cheapflights users on 2/13. 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 3/96:15 am
ONT
- MIA
1 stop8h 05m
Frontier
Wed 5/67:50 am
MIA
- ONT
1 stop19h 05m
Frontier
Deal found 2/13![Frontier logo]()
$208
This American Airlines deal was found by Cheapflights users on 2/12. 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 3/110:37 pm
ONT
- EYW
1 stop9h 34m
American Airlines
Mon 3/92:06 pm
EYW
- ONT
1 stop10h 18m
American Airlines
Deal found 2/12![American Airlines logo]()
$493
This Delta deal was found by Cheapflights users on 2/10. 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 4/1412:49 pm
ONT
- MIA
1 stop9h 05m
Delta
Wed 4/156:00 am
MIA
- ONT
1 stop8h 36m
Delta
Deal found 2/10![Delta logo]()
$337
This Mytrip deal was found by Cheapflights users on 2/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/52:08 pm
ONT
- MIA
1 stop24h 12m
Frontier
Mon 3/98:55 am
MIA
- ONT
1 stop10h 20m
Frontier
Deal found 2/9![Frontier logo]()
$290
This Delta deal was found by Cheapflights users on 2/11. 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.
Sat 8/112:00 pm
ONT
- MIA
1 stop9h 56m
Delta
Sat 8/84:40 pm
MIA
- ONT
1 stop8h 29m
Delta
Deal found 2/11![Delta logo]()
$337
This Delta deal was found by Cheapflights users on 2/11. 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.
Sun 3/110:20 pm
ONT
- MIA
1 stop8h 06m
Delta
Wed 3/186:55 am
MIA
- ONT
1 stop8h 28m
Delta
Deal found 2/11![Delta logo]()
$342
This Delta deal was found by Cheapflights users on 2/11. 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.
Sat 5/1612:10 pm
ONT
- MIA
1 stop9h 23m
Delta
Thu 5/217:00 am
MIA
- ONT
1 stop8h 19m
Delta
Deal found 2/11![Delta logo]()
$346
This Delta deal was found by Cheapflights users on 2/11. 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.
Sat 2/2810:20 pm
ONT
- MIA
1 stop8h 06m
Delta
Tue 3/36:43 am
MIA
- ONT
1 stop8h 24m
Delta
Deal found 2/11![Delta logo]()
$347
This United Airlines deal was found by Cheapflights users on 2/10. 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 5/96:00 am
ONT
- EYW
1 stop7h 02m
United Airlines
Sat 5/164:47 pm
EYW
- ONT
1 stop8h 11m
United Airlines
Deal found 2/10![United Airlines logo]()
$519
This American Airlines deal was found by Cheapflights users on 2/10. 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 3/36:15 am
ONT
- EYW
2 stops13h 07m
American Airlines
Fri 3/62:06 pm
EYW
- ONT
1 stop10h 18m
American Airlines
Deal found 2/10![American Airlines logo]()
$529
This Delta deal was found by Cheapflights users on 2/11. 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.
Sun 3/110:20 pm
ONT
- MIA
1 stop8h 06m
Delta
Tue 3/33:20 pm
MIA
- ONT
1 stop8h 45m
Delta
Deal found 2/11![Delta logo]()
$347
This American Airlines deal was found by Cheapflights users on 2/11. 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.
Thu 5/711:59 pm
ONT
- EYW
2 stops13h 31m
American Airlines
Thu 5/143:58 pm
EYW
- ONT
2 stops9h 01m
American Airlines
Deal found 2/11![American Airlines logo]()
$533
This American Airlines deal was found by Cheapflights users on 2/12. 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 3/110:37 pm
ONT
- EYW
1 stop9h 34m
American Airlines
Sun 3/87:42 pm
EYW
- ONT
2 stops16h 09m
American Airlines
Deal found 2/12![American Airlines logo]()
$567
This Delta deal was found by Cheapflights users on 2/13. 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 3/110:20 pm
ONT
- EYW
1 stop9h 39m
Delta
Mon 3/92:40 pm
EYW
- ONT
1 stop9h 20m
Delta
Deal found 2/13![Delta logo]()
$494
This Delta deal was found by Cheapflights users on 2/12. 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.
Thu 5/711:04 pm
ONT
- EYW
1 stop8h 49m
Delta
Thu 5/1411:48 am
EYW
- ONT
1 stop9h 48m
Delta
Deal found 2/12![Delta logo]()
$559
This Delta deal was found by Cheapflights users on 2/12. 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 3/315:09 pm
ONT
- EYW
2 stops14h 39m
Delta
Tue 4/72:40 pm
EYW
- ONT
1 stop9h 20m
Delta
Deal found 2/12![Delta logo]()
$564
Last-minute flights from Ontario to Florida KeysDiscover last-minute flight deals from Ontario to Florida Keys. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Florida Keys. Data last updated February 13, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/231:18 pm
ONT
- MIA
1 stop28h 33m
Multiple Airlines
Wed 3/46:25 am
MIA
- ONT
1 stop18h 09m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/243:22 pm
ONT
- MIA
2 stops17h 18m
Multiple Airlines
Wed 3/46:25 am
MIA
- ONT
1 stop18h 09m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:35 am
ONT
- MIA
1 stop18h 13m
Frontier
Wed 3/46:25 am
MIA
- ONT
1 stop18h 09m
Frontier
Deal found 2/10![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/243:22 pm
ONT
- MIA
2 stops17h 18m
Multiple Airlines
Sat 3/75:50 am
MIA
- ONT
1 stop21h 09m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$194
This CheapOair deal was found by Cheapflights users on 2/9. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/248:35 am
ONT
- MIA
1 stop18h 13m
Frontier
Fri 2/2710:17 pm
MIA
- ONT
1 stop12h 09m
Frontier
Deal found 2/9![Frontier logo]()
$200
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:40 am
ONT
- MIA
2 stops22h 48m
Frontier
Wed 3/46:25 am
MIA
- ONT
1 stop18h 09m
Frontier
Deal found 2/10![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/267:22 pm
ONT
- MIA
2 stops22h 47m
Frontier
Wed 3/46:25 am
MIA
- ONT
1 stop18h 09m
Frontier
Deal found 2/10![Frontier logo]()
$190
This CheapOair deal was found by Cheapflights users on 2/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/16:10 am
ONT
- MIA
1 stop20h 04m
Frontier
Tue 3/36:25 am
MIA
- ONT
1 stop18h 09m
Frontier
Deal found 2/10![Frontier logo]()
$195
This CheapOair deal was found by Cheapflights users on 2/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:40 am
ONT
- MIA
1 stop17h 34m
Frontier
Fri 3/65:50 am
MIA
- ONT
1 stop21h 09m
Frontier
Deal found 2/10![Frontier logo]()
$199
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:15 am
ONT
- MIA
1 stop20h 23m
Frontier
Tue 3/175:50 am
MIA
- ONT
1 stop21h 09m
Frontier
Deal found 2/9![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/106:15 am
ONT
- MIA
1 stop20h 23m
Multiple Airlines
Tue 3/178:35 pm
MIA
- ONT
2 stops30h 24m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:15 am
ONT
- MIA
1 stop20h 23m
Frontier
Wed 3/185:50 am
MIA
- ONT
1 stop21h 09m
Frontier
Deal found 2/11![Frontier logo]()
$183
One-way flights from Ontario to Florida KeysSearch for one-way flight options from Ontario to Florida Keys. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
Search for one-way flight options from Ontario to Florida Keys. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
This Trip.com deal was found by Cheapflights users on 2/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:40 am
ONT
- MIA
1 stop17h 34m
Frontier
Deal found 2/11![Frontier logo]()
$61
This Trip.com deal was found by Cheapflights users on 2/10. 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 4/1312:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Deal found 2/10![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/512:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Deal found 2/10![Frontier logo]()
$78
This Trip.com deal was found by Cheapflights users on 2/13. 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 4/2712:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Deal found 2/13![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/812:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Deal found 2/9![Frontier logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:20 am
ONT
- MIA
2 stops24h 57m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$87
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1712:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Deal found 2/13![Frontier logo]()
$89
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
- MIA
2 stops20h 50m
Frontier
Deal found 2/9![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 2/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/278:59 pm
ONT
- MIA
1 stop7h 33m
Frontier
Deal found 2/10![Frontier logo]()
$92
This Kiwi.com deal was found by Cheapflights users on 2/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:15 am
ONT
- MIA
2 stops25h 02m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$93
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:29 pm
ONT
- MIA
1 stop9h 03m
Frontier
Deal found 2/13![Frontier logo]()
$95
This Trip.com deal was found by Cheapflights users on 2/10. 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.
Tue 5/1212:59 am
ONT
- MIA
1 stop25h 06m
Frontier
Deal found 2/10![Frontier logo]()
$96
Find 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 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $149 (Kiwi.com) |
One-way from | $61 (Trip.com) |
Popular in | December |
Cheapest in | September |
Average price | $452 |
Cheapflights Fare Finder
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 13, 2026.
Use the filters below to find and compare flights from Ontario to Florida Keys that are best for you.
Fly from
Ontario
Fly to
Florida Keys
Route
Depart
Return
Price
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Thu 5/7
8:26 am-6:08 pm
1 stop6h 42m
Miami
Mon 5/11
11:34 am-4:38 pm
1 stop8h 04m
$200
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Tue 4/7
6:20 am-5:49 am
1 stop20h 29m
Miami
Wed 4/15
8:42 am-1:40 pm
1 stop7h 58m
$206
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Mon 3/9
6:15 am-5:20 pm
1 stop8h 05m
Miami
Wed 5/6
7:50 am-11:55 pm
1 stop19h 05m
$208
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Thu 3/5
2:08 pm-5:20 pm
1 stop24h 12m
Miami
Mon 3/9
8:55 am-4:15 pm
1 stop10h 20m
$290
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Mon 3/16
6:37 pm-7:27 am
1 stop9h 50m
Miami
Mon 3/23
4:10 pm-10:18 pm
1 stop9h 08m
$327
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Wed 4/8
12:57 pm-12:52 am
1 stop8h 55m
Miami
Sat 4/18
6:00 am-11:36 am
1 stop8h 36m
$331
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Tue 4/14
12:49 pm-12:54 am
1 stop9h 05m
Miami
Wed 4/15
6:00 am-11:36 am
1 stop8h 36m
$337
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Sat 8/1
12:00 pm-12:56 am
1 stop9h 56m
Miami
Sat 8/8
4:40 pm-10:09 pm
1 stop8h 29m
$337
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Sun 3/1
10:20 pm-9:26 am
1 stop8h 06m
Miami
Wed 3/18
6:55 am-12:23 pm
1 stop8h 28m
$342
OntarioMiami
ONT - MIA
ONTMIA
Ontario
Sat 5/16
12:10 pm-12:33 am
1 stop9h 23m
Miami
Thu 5/21
7:00 am-12:19 pm
1 stop8h 19m
$346
Showing 1-10 of 36 results
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.
ONT-MIA
ONT-EYW
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 Florida Keys
ONT-zzEOA
ONT-MIA
ONT-EYW
What is the cheapest month to book a flight from Ontario to Florida Keys?
Currently, January is the cheapest month in which you can book a flight from Ontario to Florida Keys (average of $250). Flying from Ontario to Florida Keys 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 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 13, 2026.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Ontario to Florida Keys by reading reviews from past customers. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
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.
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Alternative routes for Ontario to Florida Keys
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Complete your trip
Complete your trip to Florida Keys by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Ontario to Florida Keys, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Florida Keys flights
Browse other Ontario and Florida Keys flight options. Last updated on February 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to Florida Keys flights
Consider these flights traveling from Ontario to Florida Keys.
Top airline flying from Ontario to Florida Keys
Discover the top airline 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 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$314 | Average$689 | FlexibilityNo cancel fee | On-time71% |