$134+ 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 5/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
May 18 — May 251
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
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 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 18, 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 18, 2026.
This Priceline deal was found by Cheapflights users on 4/14. 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.
Sat 6/2011:16 pm
ONT
- SJU
1 stop11h 56m
Multiple Airlines
Wed 6/246:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$358
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Wed 5/138:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Sat 5/238:32 am
SJU
- ONT
2 stops25h 36m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 4/15. 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.
Tue 8/114:45 pm
ONT
- SJU
2 stops15h 15m
Southwest
Wed 8/195:15 am
SJU
- ONT
2 stops11h 50m
Southwest
Deal found 4/15![Southwest logo]()
$374
This American Airlines deal was found by Cheapflights users on 4/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/168:02 pm
ONT
- SJU
2 stops14h 33m
American Airlines
Mon 9/217:05 pm
SJU
- ONT
2 stops17h 24m
American Airlines
Deal found 4/13![American Airlines logo]()
$379
This American Airlines deal was found by Cheapflights users on 4/14. 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 8/2911:59 pm
ONT
- SJU
1 stop11h 55m
American Airlines
Tue 9/87:14 pm
SJU
- ONT
2 stops17h 15m
American Airlines
Deal found 4/14![American Airlines logo]()
$399
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Wed 5/1310:50 am
ONT
- SJU
2 stops34h 07m
Frontier
Fri 5/226:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/13![Frontier logo]()
$400
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/148:06 pm
ONT
- SJU
2 stops25h 15m
Multiple Airlines
Thu 5/212:37 pm
SJU
- ONT
1 stop31h 34m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Sat 5/1610:50 am
ONT
- SJU
2 stops34h 31m
Frontier
Fri 5/226:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/13![Frontier logo]()
$402
This Delta deal was found by Cheapflights users on 4/13. 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.
Fri 5/1510:00 pm
ONT
- SJU
1 stop11h 01m
Delta
Fri 5/222:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 4/13![Delta logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Thu 5/1410:50 am
ONT
- SJU
2 stops27h 36m
Frontier
Fri 5/226:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/13![Frontier logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Thu 5/1410:50 am
ONT
- SJU
2 stops27h 36m
Frontier
Sat 5/236:25 am
SJU
- ONT
1 stop13h 39m
Frontier
Deal found 4/13![Frontier logo]()
$408
This Delta deal was found by Cheapflights users on 4/16. 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 8/2710:59 pm
ONT
- SJU
1 stop9h 57m
Delta
Tue 9/11:06 pm
SJU
- ONT
2 stops13h 38m
Delta
Deal found 4/16![Delta logo]()
$418
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 18, 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 18, 2026.
This Southwest deal was found by Cheapflights users on 4/15. 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.
Tue 8/114:45 pm
ONT
- SJU
2 stops15h 15m
Southwest
Wed 8/195:15 am
SJU
- ONT
2 stops11h 50m
Southwest
Deal found 4/15![Southwest logo]()
$374
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/610:41 pm
ONT
- SJU
1 stop11h 35m
Multiple Airlines
Wed 6/106:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 4/17![Multiple Airlines logo]()
$423
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Thu 5/71:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 4/17![United Airlines logo]()
$447
This Delta deal was found by Cheapflights users on 4/12. 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 4/287:05 am
ONT
- SJU
1 stop13h 08m
Delta
Sat 5/212:55 pm
SJU
- ONT
1 stop11h 05m
Delta
Deal found 4/12![Delta logo]()
$490
This Southwest deal was found by Cheapflights users on 4/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:15 am
ONT
- SJU
2 stops11h 50m
Southwest
Sat 5/211:15 am
SJU
- ONT
2 stops13h 05m
Southwest
Deal found 4/12![Southwest logo]()
$490
This United Airlines deal was found by Cheapflights users on 4/15. 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 5/95:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Thu 5/142:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 4/15![United Airlines logo]()
$524
This Delta deal was found by Cheapflights users on 4/13. 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.
Wed 9/167:00 am
ONT
- SJU
1 stop12h 00m
Delta
Sun 9/207:30 am
SJU
- ONT
1 stop13h 31m
Delta
Deal found 4/13![Delta logo]()
$580
This Southwest deal was found by Cheapflights users on 4/15. 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.
Fri 5/1510:10 am
ONT
- SJU
2 stops10h 45m
Southwest
Fri 5/225:05 am
SJU
- ONT
2 stops13h 10m
Southwest
Deal found 4/15![Southwest logo]()
$555
This United Airlines deal was found by Cheapflights users on 4/16. 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 5/27:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Wed 5/67:00 am
SJU
- ONT
2 stops13h 52m
United Airlines
Deal found 4/16![United Airlines logo]()
$580
This United Airlines deal was found by Cheapflights users on 4/15. 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 9/165:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Wed 9/232:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 4/15![United Airlines logo]()
$605
This United Airlines deal was found by Cheapflights users on 4/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Wed 5/201:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 4/13![United Airlines logo]()
$605
This United Airlines deal was found by Cheapflights users on 4/14. 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 5/17:03 pm
ONT
- BQN
2 stops25h 06m
United Airlines
Fri 5/812:15 am
BQN
- ONT
3 stops20h 37m
United Airlines
Deal found 4/14![United Airlines logo]()
$793
This United Airlines deal was found by Cheapflights users on 4/14. 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 5/66:00 am
ONT
- BQN
2 stops14h 09m
United Airlines
Sat 5/912:15 am
BQN
- ONT
3 stops20h 37m
United Airlines
Deal found 4/14![United Airlines logo]()
$850
This United Airlines deal was found by Cheapflights users on 4/16. 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 5/15:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Mon 5/412:15 am
BQN
- ONT
2 stops15h 23m
United Airlines
Deal found 4/16![United Airlines logo]()
$906
This United Airlines 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 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 4/17![United Airlines logo]()
$921
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 18, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 18, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Wed 5/138:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Sat 5/238:32 am
SJU
- ONT
2 stops25h 36m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Wed 5/138:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Sun 5/246:00 am
SJU
- ONT
2 stops28h 08m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Wed 5/1310:50 am
ONT
- SJU
2 stops34h 07m
Frontier
Fri 5/226:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/13![Frontier logo]()
$400
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Wed 5/138:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Thu 5/212:37 pm
SJU
- ONT
2 stops20h 27m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/148:06 pm
ONT
- SJU
2 stops25h 15m
Multiple Airlines
Thu 5/212:37 pm
SJU
- ONT
1 stop31h 34m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$401
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Thu 5/1410:50 am
ONT
- SJU
2 stops27h 36m
Frontier
Fri 5/226:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/13![Frontier logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Thu 5/1410:50 am
ONT
- SJU
2 stops27h 36m
Frontier
Sat 5/236:25 am
SJU
- ONT
1 stop13h 39m
Frontier
Deal found 4/13![Frontier logo]()
$408
This Delta deal was found by Cheapflights users on 4/13. 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.
Fri 5/1510:00 pm
ONT
- SJU
1 stop11h 01m
Delta
Fri 5/222:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 4/13![Delta logo]()
$404
This Kiwi.com deal was found by Cheapflights users on 4/15. 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 5/158:06 pm
ONT
- SJU
2 stops32h 58m
Multiple Airlines
Fri 5/222:37 pm
SJU
- ONT
1 stop29h 27m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$425
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Sat 5/1610:50 am
ONT
- SJU
2 stops34h 31m
Frontier
Fri 5/226:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/13![Frontier logo]()
$402
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Mon 5/186:00 am
ONT
- SJU
2 stops29h 01m
Frontier
Fri 5/226:25 am
SJU
- ONT
1 stop15h 46m
Frontier
Deal found 4/13![Frontier logo]()
$422
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Mon 5/186:00 am
ONT
- SJU
2 stops29h 01m
Frontier
Sat 5/236:25 am
SJU
- ONT
1 stop13h 39m
Frontier
Deal found 4/13![Frontier logo]()
$423
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 18, 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 18, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/76:00 am
ONT
- SJU
2 stops38h 57m
Frontier
Deal found 4/14![Frontier logo]()
$134
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.
Fri 5/158:06 pm
ONT
- SJU
2 stops23h 37m
Frontier
Deal found 4/17![Frontier logo]()
$158
This American Airlines deal was found by Cheapflights users on 4/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:59 pm
ONT
- SJU
1 stop11h 55m
American Airlines
Deal found 4/13![American Airlines logo]()
$187
This American Airlines deal was found by Cheapflights users on 4/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:59 pm
ONT
- SJU
2 stops11h 39m
American Airlines
Deal found 4/13![American Airlines logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 6/86:00 am
ONT
- SJU
2 stops19h 49m
Frontier
Deal found 4/14![Frontier logo]()
$200
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 American Airlines deal was found by Cheapflights users on 4/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/297:12 pm
ONT
- SJU
2 stops12h 51m
American Airlines
Deal found 4/13![American Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 4/14. 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 5/711:36 am
ONT
- SJU
3 stops22h 56m
Multiple Airlines
Deal found 4/14![Multiple Airlines logo]()
$214
This Delta deal was found by Cheapflights users on 4/13. 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 6/2110:00 pm
ONT
- SJU
1 stop10h 44m
Delta
Deal found 4/13![Delta logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 4/16. 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 5/15:33 pm
ONT
- SJU
3 stops26h 51m
Multiple Airlines
Deal found 4/16![Multiple Airlines logo]()
$226
This Delta 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 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 4/17![Delta logo]()
$231
This United Airlines deal was found by Cheapflights users on 4/14. 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 9/286:30 pm
ONT
- SJU
2 stops14h 27m
United Airlines
Deal found 4/14![United Airlines logo]()
$232
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 18, 2026.
Round-trip from | $358 (Priceline) |
|---|---|
One-way from | $134 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $429 |
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 18, 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
Tue 8/11
4:45 pm-11:00 am
2 stops15h 15m
San Juan Luis Munoz Marin Intl
Wed 8/19
5:15 am-2:05 pm
2 stops11h 50m
$374
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 6/6
10:41 pm-1:16 pm
1 stop11h 35m
San Juan Luis Munoz Marin Intl
Wed 6/10
6:25 am-4:48 pm
1 stop13h 23m
$423
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 5/6
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Thu 5/7
1:00 am-12:22 pm
2 stops14h 22m
$447
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 4/28
7:05 am-11:13 pm
1 stop13h 08m
San Juan Luis Munoz Marin Intl
Sat 5/2
12:55 pm-9:00 pm
1 stop11h 05m
$490
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 4/28
6:15 am-9:05 pm
2 stops11h 50m
San Juan Luis Munoz Marin Intl
Sat 5/2
11:15 am-9:20 pm
2 stops13h 05m
$490
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 5/9
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Thu 5/14
2:55 pm-9:58 pm
1 stop10h 03m
$524
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 5/15
10:10 am-11:55 pm
2 stops10h 45m
San Juan Luis Munoz Marin Intl
Fri 5/22
5:05 am-3:15 pm
2 stops13h 10m
$555
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 9/16
7:00 am-10:00 pm
1 stop12h 00m
San Juan Luis Munoz Marin Intl
Sun 9/20
7:30 am-6:01 pm
1 stop13h 31m
$580
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 5/2
7:00 am-8:34 pm
1 stop10h 34m
San Juan Luis Munoz Marin Intl
Wed 5/6
7:00 am-5:52 pm
2 stops13h 52m
$580
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 9/16
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Wed 9/23
2:20 pm-9:59 pm
1 stop10h 39m
$605
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 18, 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.
Crew
8.6
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
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
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Complete your trip
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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 18, 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 18, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$509 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$597 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$321 | Average$553 | 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$492 | FlexibilityNo cancel fee | On-time62% |