$122+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
May 14 — May 211
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 14, 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 14, 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 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.
Fri 8/2811:59 pm
ONT
- SJU
2 stops11h 39m
American Airlines
Tue 9/16:00 am
SJU
- ONT
2 stops15h 47m
American Airlines
Deal found 4/13![American Airlines logo]()
$374
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Sun 5/175:47 pm
SJU
- ONT
2 stops40h 48m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$378
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 Kiwi.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Sat 5/166:41 pm
SJU
- ONT
2 stops42h 24m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$386
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.
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 American Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:35 pm
ONT
- SJU
2 stops12h 13m
American Airlines
Wed 5/1311:38 am
SJU
- ONT
1 stop12h 29m
American Airlines
Deal found 4/10![American Airlines logo]()
$408
This Kiwi.com deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:06 pm
ONT
- SJU
2 stops19h 53m
Multiple Airlines
Sat 6/136:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$412
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 14, 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 14, 2026.
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:59 pm
ONT
- SJU
1 stop11h 31m
Delta
Mon 8/312:40 pm
SJU
- ONT
1 stop10h 16m
Delta
Deal found 4/10![Delta logo]()
$432
This Southwest deal was found by Cheapflights users on 4/11. 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.
Fri 7/248:45 pm
ONT
- SJU
2 stops10h 45m
Southwest
Thu 7/3010:20 am
SJU
- ONT
1 stop15h 05m
Southwest
Deal found 4/11![Southwest logo]()
$523
This United Airlines deal was found by Cheapflights users on 4/9. 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 4/275:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Fri 5/12:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 4/9![United Airlines logo]()
$556
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/2610:59 pm
ONT
- SJU
1 stop11h 31m
Delta
Mon 8/312:40 pm
SJU
- ONT
1 stop10h 16m
Delta
Deal found 4/10![Delta logo]()
$490
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Sat 5/27:40 am
SJU
- ONT
1 stop13h 21m
United Airlines
Deal found 4/12![United Airlines logo]()
$580
This Southwest deal was found by Cheapflights users on 4/9. 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.
Fri 6/199:40 am
ONT
- SJU
1 stop11h 45m
Southwest
Fri 6/2610:20 am
SJU
- ONT
1 stop15h 05m
Southwest
Deal found 4/9![Southwest logo]()
$633
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.
Tue 5/195:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Tue 5/261:00 am
SJU
- ONT
2 stops14h 47m
United Airlines
Deal found 4/13![United Airlines logo]()
$605
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.
Mon 6/85:24 pm
ONT
- SJU
2 stops16h 30m
Delta
Sat 6/137:30 am
SJU
- ONT
2 stops17h 54m
Delta
Deal found 4/12![Delta logo]()
$621
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
- SJU
1 stop11h 38m
United Airlines
Wed 5/131:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 4/14![United Airlines logo]()
$605
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Thu 7/166:30 am
ONT
- SJU
1 stop11h 04m
United Airlines
Tue 8/42:05 am
SJU
- ONT
2 stops13h 07m
United Airlines
Deal found 4/9![United Airlines logo]()
$615
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/95:00 am
ONT
- BQN
3 stops15h 09m
United Airlines
Mon 6/1512:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 4/12![United Airlines logo]()
$700
This United Airlines deal was found by Cheapflights users on 4/9. 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 5/256:30 am
ONT
- BQN
2 stops37h 39m
United Airlines
Tue 6/212:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 4/9![United Airlines logo]()
$703
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 4/10. 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.
Wed 5/135:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Tue 5/1912:15 am
BQN
- ONT
2 stops15h 23m
United Airlines
Deal found 4/10![United Airlines logo]()
$832
This United Airlines deal was found by Cheapflights users on 4/11. 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 5/66:00 am
ONT
- BQN
2 stops14h 09m
United Airlines
Sat 5/912:15 am
BQN
- ONT
2 stops25h 20m
United Airlines
Deal found 4/11![United Airlines logo]()
$1,000
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/275:10 am
ONT
- BQN
3 stops14h 59m
United Airlines
Thu 4/3012:15 am
BQN
- ONT
3 stops15h 23m
United Airlines
Deal found 4/12![United Airlines logo]()
$1,441
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 14, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 14, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:05 am
ONT
- SJU
1 stop12h 12m
Delta
Wed 5/132:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 4/10![Delta logo]()
$374
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Sun 5/175:47 pm
SJU
- ONT
2 stops40h 48m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$378
This Kiwi.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/108:30 am
ONT
- SJU
1 stop26h 02m
Multiple Airlines
Sat 5/166:41 pm
SJU
- ONT
2 stops42h 24m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$386
This American Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:35 pm
ONT
- SJU
2 stops12h 13m
American Airlines
Wed 5/1311:38 am
SJU
- ONT
1 stop12h 29m
American Airlines
Deal found 4/10![American Airlines logo]()
$408
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 5/1310:50 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 4/13. 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 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.
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 4/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/235:59 pm
ONT
- SJU
2 stops44h 15m
Multiple Airlines
Fri 6/52:37 pm
SJU
- ONT
1 stop29h 27m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$415
This Kiwi.com deal was found by Cheapflights users on 4/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:06 pm
ONT
- SJU
2 stops19h 53m
Multiple Airlines
Sat 6/136:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 4/11![Multiple Airlines logo]()
$412
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 14, 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 14, 2026.
This Trip.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/312:59 am
ONT
- SJU
2 stops34h 02m
Frontier
Deal found 4/10![Frontier logo]()
$122
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 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/158:06 pm
ONT
- SJU
2 stops32h 58m
Frontier
Deal found 4/10![Frontier logo]()
$161
This Delta deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:00 pm
ONT
- SJU
1 stop11h 01m
Delta
Deal found 4/10![Delta logo]()
$187
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 American Airlines deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/297:12 pm
ONT
- SJU
2 stops11h 27m
American Airlines
Deal found 4/10![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 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:50 am
ONT
- SJU
3 stops29h 09m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$225
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
- SJU
1 stop11h 38m
United Airlines
Deal found 4/14![United Airlines logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 4/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/175:33 pm
ONT
- SJU
3 stops28h 25m
Multiple Airlines
Deal found 4/10![Multiple Airlines logo]()
$240
This United Airlines deal was found by Cheapflights users on 4/9. 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.
Fri 5/156:59 pm
ONT
- BQN
3 stops25h 10m
United Airlines
Deal found 4/9![United Airlines logo]()
$373
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 14, 2026.
Round-trip from | $363 (Kiwi.com) |
|---|---|
One-way from | $122 (Trip.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 14, 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
Mon 8/24
10:59 pm-1:30 pm
1 stop11h 31m
San Juan Luis Munoz Marin Intl
Mon 8/31
2:40 pm-9:56 pm
1 stop10h 16m
$432
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 8/26
10:59 pm-1:30 pm
1 stop11h 31m
San Juan Luis Munoz Marin Intl
Mon 8/31
2:40 pm-9:56 pm
1 stop10h 16m
$490
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 7/24
8:45 pm-10:30 am
2 stops10h 45m
San Juan Luis Munoz Marin Intl
Thu 7/30
10:20 am-10:25 pm
1 stop15h 05m
$523
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 4/27
5:10 am-5:38 pm
1 stop9h 28m
San Juan Luis Munoz Marin Intl
Fri 5/1
2:55 pm-9:58 pm
1 stop10h 03m
$556
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 4/28
6:05 am-8:38 pm
1 stop11h 33m
San Juan Luis Munoz Marin Intl
Sat 5/2
7:40 am-6:01 pm
1 stop13h 21m
$580
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 5/19
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Tue 5/26
1:00 am-12:47 pm
2 stops14h 47m
$605
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 5/6
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Wed 5/13
1:40 pm-8:36 pm
1 stop9h 56m
$605
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 7/16
6:30 am-8:34 pm
1 stop11h 04m
San Juan Luis Munoz Marin Intl
Tue 8/4
2:05 am-12:12 pm
2 stops13h 07m
$615
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 6/8
5:24 pm-12:54 pm
2 stops16h 30m
San Juan Luis Munoz Marin Intl
Sat 6/13
7:30 am-10:24 pm
2 stops17h 54m
$621
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 6/19
9:40 am-12:25 am
1 stop11h 45m
San Juan Luis Munoz Marin Intl
Fri 6/26
10:20 am-10:25 pm
1 stop15h 05m
$633
Showing 1-10 of 28 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, October is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $181). Flying from Ontario to Puerto Rico in February is currently the most expensive (average of $295). 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 14, 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
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Overall
8.0
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
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 14, 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 14, 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% |