$190+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Aug 12 — Aug 191
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 July 13, 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 July 13, 2026.
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:56 pm
ONT
- SJU
3 stops19h 58m
United Airlines
Sat 8/292:00 pm
SJU
- ONT
1 stop9h 53m
United Airlines
Deal found 7/7![United Airlines logo]()
$384
This Southwest deal was found by Cheapflights users on 7/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:35 am
ONT
- SJU
2 stops10h 25m
Southwest
Sat 8/295:05 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 7/10![Southwest logo]()
$394
This American Airlines deal was found by Cheapflights users on 7/11. 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 10/227:34 pm
ONT
- SJU
2 stops12h 46m
American Airlines
Tue 10/277:30 am
SJU
- ONT
2 stops14h 13m
American Airlines
Deal found 7/11![American Airlines logo]()
$436
This Southwest deal was found by Cheapflights users on 7/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1411:00 am
ONT
- SJU
2 stops9h 50m
Southwest
Fri 9/185:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 7/9![Southwest logo]()
$437
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Tue 8/255:00 am
ONT
- SJU
2 stops15h 50m
United Airlines
Sat 8/292:00 pm
SJU
- ONT
1 stop9h 53m
United Airlines
Deal found 7/10![United Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:00 am
ONT
- SJU
2 stops15h 50m
United Airlines
Mon 10/267:25 am
SJU
- ONT
2 stops16h 31m
United Airlines
Deal found 7/7![United Airlines logo]()
$440
This United Airlines deal was found by Cheapflights users on 7/9. 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 9/146:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Fri 9/187:00 am
SJU
- ONT
2 stops14h 11m
United Airlines
Deal found 7/9![United Airlines logo]()
$441
This Delta deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/15:52 pm
ONT
- SJU
2 stops14h 44m
Delta
Fri 11/132:05 pm
SJU
- ONT
2 stops13h 43m
Delta
Deal found 7/8![Delta logo]()
$442
This Faresmojo deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1611:15 pm
ONT
- SJU
1 stop11h 06m
JetBlue
Mon 10/192:31 pm
SJU
- ONT
1 stop10h 30m
JetBlue
Deal found 7/8![JetBlue logo]()
$454
This Southwest deal was found by Cheapflights users on 7/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:35 am
ONT
- SJU
2 stops10h 25m
Southwest
Mon 8/315:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 7/11![Southwest logo]()
$460
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:00 am
ONT
- BQN
2 stops14h 09m
United Airlines
Wed 8/2612:15 am
BQN
- ONT
2 stops15h 35m
United Airlines
Deal found 7/8![United Airlines logo]()
$622
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Wed 8/195:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Mon 8/2412:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 7/9![United Airlines logo]()
$736
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 July 13, 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 July 13, 2026.
This Delta deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:52 pm
ONT
- SJU
2 stops15h 04m
Delta
Tue 11/37:00 am
SJU
- ONT
2 stops19h 43m
Delta
Deal found 7/7![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/215:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Sun 10/251:21 pm
SJU
- ONT
1 stop10h 35m
United Airlines
Deal found 7/8![United Airlines logo]()
$474
This American Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3010:10 pm
ONT
- SJU
1 stop10h 10m
American Airlines
Tue 11/33:59 pm
SJU
- ONT
1 stop11h 58m
American Airlines
Deal found 7/7![American Airlines logo]()
$500
This JetBlue deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:59 pm
ONT
- SJU
1 stop11h 15m
JetBlue
Fri 9/411:50 am
SJU
- ONT
1 stop13h 48m
JetBlue
Deal found 7/7![JetBlue logo]()
$571
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Tue 9/226:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Wed 9/302:00 pm
SJU
- ONT
1 stop9h 58m
United Airlines
Deal found 7/9![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Wed 9/97:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 7/7![United Airlines logo]()
$479
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Sat 1/95:00 am
ONT
- BQN
2 stops14h 57m
United Airlines
Fri 1/151:09 am
BQN
- ONT
2 stops15h 11m
United Airlines
Deal found 7/9![United Airlines logo]()
$484
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Sat 9/262:00 pm
SJU
- ONT
1 stop9h 58m
United Airlines
Deal found 7/11![United Airlines logo]()
$537
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Sun 9/136:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Sat 9/192:55 pm
SJU
- ONT
1 stop10h 04m
United Airlines
Deal found 7/10![United Airlines logo]()
$537
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Tue 8/257:00 am
SJU
- ONT
2 stops14h 11m
United Airlines
Deal found 7/11![United Airlines logo]()
$565
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:00 am
ONT
- BQN
2 stops14h 09m
United Airlines
Wed 8/2612:15 am
BQN
- ONT
2 stops15h 35m
United Airlines
Deal found 7/8![United Airlines logo]()
$622
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/95:00 am
ONT
- SJU
2 stops15h 36m
United Airlines
Fri 11/202:05 am
SJU
- ONT
2 stops22h 51m
United Airlines
Deal found 7/8![United Airlines logo]()
$629
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Wed 8/195:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Mon 8/2412:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 7/9![United Airlines logo]()
$736
This United Airlines deal was found by Cheapflights users on 7/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/115:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Mon 8/1712:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 7/12![United Airlines logo]()
$810
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Tue 10/612:15 am
BQN
- ONT
2 stops15h 31m
United Airlines
Deal found 7/11![United Airlines logo]()
$890
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated July 13, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated July 13, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:34 am
ONT
- SJU
1 stop15h 16m
American Airlines
Fri 8/73:44 pm
SJU
- ONT
1 stop10h 15m
American Airlines
Deal found 7/9![American Airlines logo]()
$500
This American Airlines deal was found by Cheapflights users on 7/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:34 am
ONT
- SJU
1 stop15h 16m
American Airlines
Tue 8/45:45 am
SJU
- ONT
1 stop19h 47m
American Airlines
Deal found 7/9![American Airlines logo]()
$495
This Southwest deal was found by Cheapflights users on 7/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/711:00 am
ONT
- SJU
2 stops9h 50m
Southwest
Fri 8/146:30 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 7/10![Southwest logo]()
$490
This Kiwi.com deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/138:17 am
ONT
- SJU
1 stop17h 45m
Frontier
Mon 8/1710:48 pm
SJU
- ONT
2 stops20h 06m
Frontier
Deal found 7/8![Frontier logo]()
$491
This United Airlines deal was found by Cheapflights users on 7/9. 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.
Wed 8/195:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Mon 8/2412:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 7/9![United Airlines logo]()
$736
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Thu 8/272:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 7/8![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:00 am
ONT
- BQN
2 stops14h 09m
United Airlines
Wed 8/2612:15 am
BQN
- ONT
2 stops15h 35m
United Airlines
Deal found 7/8![United Airlines logo]()
$622
This Southwest deal was found by Cheapflights users on 7/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:35 am
ONT
- SJU
2 stops10h 25m
Southwest
Sat 8/295:05 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 7/10![Southwest logo]()
$394
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Tue 8/255:00 am
ONT
- SJU
2 stops15h 50m
United Airlines
Sat 8/292:00 pm
SJU
- ONT
1 stop9h 53m
United Airlines
Deal found 7/10![United Airlines logo]()
$439
This Southwest deal was found by Cheapflights users on 7/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/258:35 am
ONT
- SJU
2 stops10h 25m
Southwest
Mon 8/315:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 7/11![Southwest logo]()
$460
This United Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/261:56 pm
ONT
- SJU
3 stops19h 58m
United Airlines
Sat 8/292:00 pm
SJU
- ONT
1 stop9h 53m
United Airlines
Deal found 7/7![United Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 7/10. 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.
Thu 8/277:13 pm
ONT
- SJU
2 stops16h 31m
United Airlines
Sun 8/307:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 7/10![United Airlines logo]()
$462
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 July 13, 2026.
Search for one-way flight options from Ontario to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated July 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 8/48:17 am
ONT
- SJU
2 stops37h 24m
Frontier
Deal found 7/11![Frontier logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 7/11. 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 8/88:17 am
ONT
- SJU
2 stops37h 24m
Frontier
Deal found 7/11![Frontier logo]()
$192
This American Airlines deal was found by Cheapflights users on 7/11. 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.
Wed 8/510:29 am
ONT
- SJU
2 stops20h 14m
American Airlines
Deal found 7/11![American Airlines logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Fri 8/78:17 am
ONT
- SJU
2 stops37h 24m
Frontier
Deal found 7/11![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 7/11. 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.
Thu 8/68:17 am
ONT
- SJU
2 stops37h 24m
Frontier
Deal found 7/11![Frontier logo]()
$232
This United Airlines deal was found by Cheapflights users on 7/10. 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 11/145:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Deal found 7/10![United Airlines logo]()
$237
This JetBlue deal was found by Cheapflights users on 7/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:59 pm
ONT
- SJU
1 stop11h 15m
JetBlue
Deal found 7/8![JetBlue logo]()
$246
This American Airlines deal was found by Cheapflights users on 7/11. 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.
Sun 8/25:34 am
ONT
- SJU
1 stop15h 16m
American Airlines
Deal found 7/11![American Airlines logo]()
$250
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/55:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 7/11![United Airlines logo]()
$258
This United Airlines deal was found by Cheapflights users on 7/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/285:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 7/11![United Airlines logo]()
$295
This American Airlines deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/232:15 pm
ONT
- SJU
1 stop11h 24m
American Airlines
Deal found 7/7![American Airlines logo]()
$310
This Priceline deal was found by Cheapflights users on 7/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/511:59 pm
ONT
- SJU
1 stop21h 14m
JetBlue
Deal found 7/7![JetBlue logo]()
$320
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 July 13, 2026.
Round-trip from | $384 (United Airlines) |
|---|---|
One-way from | $190 (Kiwi.com) |
Popular in | June |
Cheapest in | October |
Average price | $538 |
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 July 13, 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
Fri 10/30
5:52 pm-11:56 am
2 stops15h 04m
San Juan Luis Munoz Marin Intl
Tue 11/3
7:00 am-10:43 pm
2 stops19h 43m
$384
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 10/21
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Sun 10/25
1:21 pm-8:56 pm
1 stop10h 35m
$474
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 9/22
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Wed 9/30
2:00 pm-8:58 pm
1 stop9h 58m
$474
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 9/4
7:13 pm-3:42 pm
2 stops17h 29m
San Juan Luis Munoz Marin Intl
Wed 9/9
7:00 am-8:01 pm
2 stops16h 01m
$479
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Sat 1/9
5:00 am-11:57 pm
2 stops14h 57m
Aguadilla Borinquen
Fri 1/15
1:09 am-12:20 pm
2 stops15h 11m
$484
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 10/30
10:10 pm-11:20 am
1 stop10h 10m
San Juan Luis Munoz Marin Intl
Tue 11/3
3:59 pm-11:57 pm
1 stop11h 58m
$500
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 9/18
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Sat 9/26
2:00 pm-8:58 pm
1 stop9h 58m
$537
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 9/13
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Sat 9/19
2:55 pm-9:59 pm
1 stop10h 04m
$537
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 8/21
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Tue 8/25
7:00 am-6:11 pm
2 stops14h 11m
$565
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 8/31
11:59 pm-2:14 pm
1 stop11h 15m
San Juan Luis Munoz Marin Intl
Fri 9/4
11:50 am-10:38 pm
1 stop13h 48m
$571
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 June is currently the most expensive (average of $419). 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.
How far ahead should I book a flight from Ontario to Puerto Rico?
The price you pay for your flight from Ontario to Puerto Rico may vary depending on when you book. For the best chance of a lower fare, look to book 64 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 July 13, 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.
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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 July 13, 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 July 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$176 | Average$532 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$552 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$526 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$360 | Average$577 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$419 | Average$562 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$561 | FlexibilityNo cancel fee | On-time62% |