$123+ Cheap flights from Ontario (ONT) to Puerto Rico
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 5/12. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
May 23 — May 301
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Puerto Rico 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
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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 Puerto Rico
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Cheapest flights from Ontario to Puerto RicoExplore the most affordable flight options available from Ontario to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
Explore the most affordable flight options available from Ontario to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.
This Delta deal was found by Cheapflights users on 4/21. 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.
Thu 8/610:00 pm
ONT
- SJU
1 stop10h 46m
Delta
Thu 8/131:06 pm
SJU
- ONT
1 stop11h 50m
Delta
Deal found 4/21![Delta logo]()
$355
This American Airlines deal was found by Cheapflights users on 4/21. 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 8/1111:59 pm
ONT
- SJU
2 stops15h 25m
American Airlines
Mon 8/177:14 pm
SJU
- ONT
2 stops17h 20m
American Airlines
Deal found 4/21![American Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 4/21. 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.
Sun 10/2510:59 pm
ONT
- SJU
1 stop9h 37m
Delta
Fri 10/302:31 pm
SJU
- ONT
1 stop10h 43m
Delta
Deal found 4/21![Delta logo]()
$374
This Delta deal was found by Cheapflights users on 4/22. 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 8/47:05 am
ONT
- SJU
1 stop10h 40m
Delta
Thu 8/131:06 pm
SJU
- ONT
1 stop11h 50m
Delta
Deal found 4/22![Delta logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/178:06 pm
ONT
- SJU
2 stops27h 02m
Frontier
Sat 5/236:25 am
SJU
- ONT
1 stop13h 39m
Frontier
Deal found 4/20![Frontier logo]()
$390
This Delta deal was found by Cheapflights users on 4/22. 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 8/610:00 pm
ONT
- SJU
1 stop12h 32m
Delta
Tue 8/117:30 am
SJU
- ONT
1 stop13h 31m
Delta
Deal found 4/22![Delta logo]()
$398
This Delta deal was found by Cheapflights users on 4/22. 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.
Fri 8/1410:59 pm
ONT
- SJU
1 stop9h 57m
Delta
Wed 8/191:06 pm
SJU
- ONT
1 stop11h 50m
Delta
Deal found 4/22![Delta logo]()
$399
This Southwest deal was found by Cheapflights users on 4/22. 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.
Thu 8/66:20 am
ONT
- SJU
2 stops10h 45m
Southwest
Thu 8/135:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 4/22![Southwest logo]()
$404
This Delta deal was found by Cheapflights users on 4/22. 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 8/2310:59 pm
ONT
- SJU
1 stop9h 57m
Delta
Fri 8/282:40 pm
SJU
- ONT
1 stop10h 16m
Delta
Deal found 4/22![Delta logo]()
$413
This American Airlines deal was found by Cheapflights users on 4/21. 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 8/68:01 pm
ONT
- SJU
2 stops14h 42m
American Airlines
Fri 8/147:14 pm
SJU
- ONT
2 stops17h 20m
American Airlines
Deal found 4/21![American Airlines logo]()
$414
This Delta deal was found by Cheapflights users on 4/21. 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.
Wed 10/217:00 am
ONT
- SJU
1 stop11h 59m
Delta
Wed 10/287:30 am
SJU
- ONT
1 stop13h 48m
Delta
Deal found 4/21![Delta logo]()
$418
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 8/45:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Tue 8/117:20 am
SJU
- ONT
2 stops13h 59m
United Airlines
Deal found 4/21![United Airlines logo]()
$419
Best flights from Ontario to Puerto RicoDiscover carefully curated flight deals from Ontario to Puerto Rico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
Discover carefully curated flight deals from Ontario to Puerto Rico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 23, 2026.
This United Airlines deal was found by Cheapflights users on 4/22. 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 9/265:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Tue 9/292:00 pm
SJU
- ONT
1 stop9h 52m
United Airlines
Deal found 4/22![United Airlines logo]()
$489
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:16 pm
ONT
- SJU
2 stops16h 39m
Delta
Fri 8/72:42 pm
SJU
- ONT
2 stops12h 02m
Delta
Deal found 4/20![Delta logo]()
$497
This American Airlines deal was found by Cheapflights users on 4/22. 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 6/227:12 pm
ONT
- SJU
2 stops11h 27m
American Airlines
Fri 7/107:25 am
SJU
- ONT
1 stop18h 09m
American Airlines
Deal found 4/22![American Airlines logo]()
$604
This Trip.com deal was found by Cheapflights users on 4/19. 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.
Mon 6/83:30 pm
ONT
- BQN
2 stops31h 35m
Frontier
Sun 6/143:00 am
BQN
- ONT
2 stops15h 08m
Frontier
Deal found 4/19![Frontier logo]()
$709
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 8/41:18 pm
ONT
- SJU
2 stops13h 11m
United Airlines
Sat 8/81:40 pm
SJU
- ONT
1 stop10h 02m
United Airlines
Deal found 4/21![United Airlines logo]()
$551
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:15 pm
ONT
- SJU
1 stop12h 10m
Delta
Sat 5/91:14 pm
SJU
- ONT
1 stop11h 34m
Delta
Deal found 4/20![Delta logo]()
$555
This United Airlines deal was found by Cheapflights users on 4/20. 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 5/45:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Tue 5/51:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 4/20![United Airlines logo]()
$580
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Tue 5/55:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Wed 5/61:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 4/20![United Airlines logo]()
$580
This United Airlines deal was found by Cheapflights users on 4/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/55:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Sat 5/97:00 am
SJU
- ONT
2 stops13h 52m
United Airlines
Deal found 4/19![United Airlines logo]()
$602
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Sun 5/36:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Thu 5/71:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 4/22![United Airlines logo]()
$610
This United Airlines deal was found by Cheapflights users on 4/22. 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 5/25:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Sat 5/97:00 am
SJU
- ONT
2 stops13h 52m
United Airlines
Deal found 4/22![United Airlines logo]()
$632
This United Airlines deal was found by Cheapflights users on 4/18. 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 5/45:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 5/81:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 4/18![United Airlines logo]()
$663
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Sat 8/297:00 am
ONT
- BQN
2 stops13h 09m
United Airlines
Tue 9/112:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 4/20![United Airlines logo]()
$850
This United Airlines deal was found by Cheapflights users on 4/18. 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 5/96:59 pm
ONT
- BQN
3 stops25h 10m
United Airlines
Tue 5/1212:15 am
BQN
- ONT
2 stops23h 21m
United Airlines
Deal found 4/18![United Airlines logo]()
$921
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Tue 5/266:30 am
ONT
- BQN
2 stops13h 39m
United Airlines
Sun 5/3112:15 am
BQN
- ONT
2 stops24h 40m
United Airlines
Deal found 4/22![United Airlines logo]()
$1,109
This United Airlines deal was found by Cheapflights users on 4/21. 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.
Wed 6/176:00 am
ONT
- BQN
2 stops14h 09m
United Airlines
Sat 6/2012:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 4/21![United Airlines logo]()
$1,136
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Wed 5/275:45 am
ONT
- BQN
2 stops14h 24m
United Airlines
Sun 5/3112:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 4/22![United Airlines logo]()
$1,298
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 23, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 23, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 4/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:35 pm
ONT
- SJU
2 stops13h 54m
American Airlines
Mon 5/1111:59 pm
SJU
- ONT
1 stop13h 10m
American Airlines
Deal found 4/20![American Airlines logo]()
$472
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Sun 5/1012:24 pm
ONT
- SJU
2 stops13h 08m
American Airlines
Tue 5/125:45 am
SJU
- ONT
2 stops15h 39m
American Airlines
Deal found 4/21![American Airlines logo]()
$432
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/1210:50 am
ONT
- SJU
2 stops27h 36m
Multiple Airlines
Fri 5/222:37 pm
SJU
- ONT
1 stop29h 27m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$426
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/1210:50 am
ONT
- SJU
2 stops27h 36m
Multiple Airlines
Sat 5/232:37 pm
SJU
- ONT
1 stop31h 34m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$447
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/1210:50 am
ONT
- SJU
2 stops27h 36m
Multiple Airlines
Mon 5/182:37 pm
SJU
- ONT
1 stop31h 34m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$461
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/1310:50 am
ONT
- SJU
2 stops34h 07m
Multiple Airlines
Fri 5/222:37 pm
SJU
- ONT
1 stop29h 27m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$421
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/138:06 pm
ONT
- SJU
2 stops27h 02m
Multiple Airlines
Sat 5/232:37 pm
SJU
- ONT
1 stop31h 34m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$466
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/1310:50 am
ONT
- SJU
2 stops34h 07m
Frontier
Sun 5/246:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/22![Frontier logo]()
$469
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 5/146:00 am
ONT
- SJU
2 stops38h 57m
Multiple Airlines
Fri 5/222:37 pm
SJU
- ONT
1 stop29h 27m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$465
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/178:06 pm
ONT
- SJU
2 stops27h 02m
Frontier
Sat 5/236:25 am
SJU
- ONT
1 stop13h 39m
Frontier
Deal found 4/20![Frontier logo]()
$390
This Priceline deal was found by Cheapflights users on 4/21. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:41 pm
ONT
- SJU
1 stop23h 57m
Multiple Airlines
Thu 6/46:25 am
SJU
- ONT
1 stop15h 46m
Multiple Airlines
Deal found 4/21![Multiple Airlines logo]()
$463
This Priceline deal was found by Cheapflights users on 4/20. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/3110:41 pm
ONT
- SJU
1 stop16h 19m
Multiple Airlines
Thu 6/46:25 am
SJU
- ONT
1 stop15h 46m
Multiple Airlines
Deal found 4/20![Multiple Airlines logo]()
$450
One-way flights from Ontario to Puerto RicoSearch for one-way flight options from Ontario to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
Search for one-way flight options from Ontario to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated April 23, 2026.
This Trip.com deal was found by Cheapflights users on 4/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/124:39 pm
ONT
- SJU
2 stops18h 22m
Frontier
Deal found 4/21![Frontier logo]()
$123
This Trip.com deal was found by Cheapflights users on 4/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:33 pm
ONT
- SJU
2 stops27h 26m
Frontier
Deal found 4/20![Frontier logo]()
$169
This Trip.com deal was found by Cheapflights users on 4/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/35:12 pm
ONT
- SJU
2 stops18h 15m
Frontier
Deal found 4/20![Frontier logo]()
$196
This Kiwi.com deal was found by Cheapflights users on 4/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:00 am
ONT
- SJU
2 stops39h 15m
Frontier
Deal found 4/20![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 4/17. 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 6/66:00 am
ONT
- SJU
2 stops31h 52m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$207
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:43 pm
ONT
- SJU
2 stops20h 50m
Frontier
Deal found 4/21![Frontier logo]()
$213
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 6/96:43 pm
ONT
- SJU
2 stops26h 32m
Multiple Airlines
Deal found 4/22![Multiple Airlines logo]()
$221
This Trip.com deal was found by Cheapflights users on 4/19. 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.
Wed 4/2912:59 am
ONT
- SJU
2 stops38h 08m
Frontier
Deal found 4/19![Frontier logo]()
$225
This Delta deal was found by Cheapflights users on 4/18. 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 7/125:16 pm
ONT
- SJU
2 stops16h 39m
Delta
Deal found 4/18![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Tue 5/126:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Deal found 4/20![United Airlines logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 4/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/258:00 am
ONT
- SJU
2 stops32h 22m
Multiple Airlines
Deal found 4/19![Multiple Airlines logo]()
$233
This United Airlines deal was found by Cheapflights users on 4/18. 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 4/256:05 am
ONT
- BQN
2 stops14h 04m
United Airlines
Deal found 4/18![United Airlines logo]()
$325
Find flight deals from Ontario to Puerto Rico
Keep the following information in mind while searching for Ontario to Puerto Rico flight deals. Data was last updated April 23, 2026.
Round-trip from | $355 (Delta) |
|---|---|
One-way from | $123 (Trip.com) |
Popular in | December |
Cheapest in | October |
Average price | $430 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Puerto Rico 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 April 23, 2026.
Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 9/26
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Tue 9/29
2:00 pm-8:52 pm
1 stop9h 52m
$489
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 7/31
5:16 pm-12:55 pm
2 stops16h 39m
San Juan Luis Munoz Marin Intl
Fri 8/7
2:42 pm-11:44 pm
2 stops12h 02m
$497
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 8/4
1:18 pm-5:29 am
2 stops13h 11m
San Juan Luis Munoz Marin Intl
Sat 8/8
1:40 pm-8:42 pm
1 stop10h 02m
$551
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 5/4
10:15 pm-1:25 pm
1 stop12h 10m
San Juan Luis Munoz Marin Intl
Sat 5/9
1:14 pm-9:48 pm
1 stop11h 34m
$555
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 5/4
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Tue 5/5
1:40 pm-8:36 pm
1 stop9h 56m
$580
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 5/5
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Wed 5/6
1:40 pm-8:36 pm
1 stop9h 56m
$580
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 5/5
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Sat 5/9
7:00 am-5:52 pm
2 stops13h 52m
$602
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 6/22
7:12 pm-9:39 am
2 stops11h 27m
San Juan Luis Munoz Marin Intl
Fri 7/10
7:25 am-10:34 pm
1 stop18h 09m
$604
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 5/3
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Thu 5/7
1:40 pm-8:36 pm
1 stop9h 56m
$610
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 5/2
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Sat 5/9
7:00 am-5:52 pm
2 stops13h 52m
$632
Showing 1-10 of 29 resultsSorted by cheapest first
Best time to book a flight from Ontario to Puerto Rico
Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from Ontario with our price prediction graph.
ONT-SJU
ONT-BQN
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 Puerto Rico
ONT-PR0
ONT-SJU
ONT-BQN
What is the cheapest month to book a flight from Ontario to Puerto Rico?
Currently, November is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $120). Flying from Ontario to Puerto Rico in July is currently the most expensive (average of $427). 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 Puerto Rico
Get insights into the airlines that provide service to Puerto Rico. 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 Puerto Rico. Reviews last updated April 23, 2026.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Overall
8.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Entertainment
7.5
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 Puerto Rico. 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 Puerto Rico
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Puerto Rico by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Puerto Rico by cabin class
Find flights from Ontario to Puerto Rico, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Puerto Rico flights
Browse other Ontario and Puerto Rico flight options. Last updated on April 23, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Ontario to Puerto Rico
Discover the top 6 airlines that operate flights from Ontario to Puerto Rico. 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 April 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$509 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$552 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$321 | Average$557 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$360 | Average$577 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$445 | Average$555 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$467 | FlexibilityNo cancel fee | On-time62% |