$168+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Mar 23 — Mar 301
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 February 21, 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 February 21, 2026.
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Wed 5/137:20 am
SJU
- ONT
2 stops17h 38m
United Airlines
Deal found 2/18![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 5/81:00 am
SJU
- ONT
2 stops14h 38m
United Airlines
Deal found 2/21![United Airlines logo]()
$316
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Tue 4/141:00 am
SJU
- ONT
2 stops14h 20m
United Airlines
Deal found 2/19![United Airlines logo]()
$335
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/277:00 am
ONT
- SJU
1 stop11h 59m
Delta
Thu 10/2912:46 pm
SJU
- ONT
1 stop12h 28m
Delta
Deal found 2/21![Delta logo]()
$336
This Delta deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/157:00 am
ONT
- SJU
1 stop12h 00m
Delta
Tue 9/227:30 am
SJU
- ONT
1 stop13h 31m
Delta
Deal found 2/19![Delta logo]()
$356
This Delta deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/911:04 pm
ONT
- SJU
1 stop9h 42m
Delta
Wed 5/1312:50 pm
SJU
- ONT
1 stop12h 04m
Delta
Deal found 2/18![Delta logo]()
$372
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/247:00 am
ONT
- SJU
1 stop11h 59m
Delta
Wed 10/287:30 am
SJU
- ONT
1 stop13h 48m
Delta
Deal found 2/21![Delta logo]()
$373
This American Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/226:38 am
ONT
- SJU
2 stops27h 02m
American Airlines
Wed 10/285:50 pm
SJU
- ONT
2 stops17h 40m
American Airlines
Deal found 2/21![American Airlines logo]()
$376
This Southwest deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/19:55 pm
ONT
- SJU
1 stop12h 50m
Southwest
Tue 5/55:35 am
SJU
- ONT
2 stops13h 45m
Southwest
Deal found 2/19![Southwest logo]()
$379
This Priceline deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/1711:59 pm
ONT
- SJU
1 stop10h 48m
Multiple Airlines
Sat 8/226:15 am
SJU
- ONT
1 stop12h 10m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$380
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1211:59 pm
ONT
- SJU
2 stops15h 11m
American Airlines
Sat 5/167:25 am
SJU
- ONT
1 stop16h 42m
American Airlines
Deal found 2/18![American Airlines logo]()
$381
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1810:26 pm
ONT
- SJU
1 stop19h 25m
American Airlines
Sat 4/257:25 am
SJU
- ONT
1 stop16h 42m
American Airlines
Deal found 2/20![American Airlines logo]()
$382
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 February 21, 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 February 21, 2026.
This Delta deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/911:04 pm
ONT
- SJU
1 stop9h 42m
Delta
Wed 5/1312:50 pm
SJU
- ONT
1 stop12h 04m
Delta
Deal found 2/18![Delta logo]()
$372
This Southwest deal was found by Cheapflights users on 2/17. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/138:45 pm
ONT
- SJU
2 stops10h 50m
Southwest
Thu 5/145:35 am
SJU
- ONT
1 stop12h 40m
Southwest
Deal found 2/17![Southwest logo]()
$390
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/195:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Sat 5/2312:15 am
BQN
- ONT
2 stops15h 32m
United Airlines
Deal found 2/18![United Airlines logo]()
$495
This Southwest deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:05 pm
ONT
- SJU
1 stop8h 40m
Southwest
Tue 7/215:00 am
SJU
- ONT
1 stop10h 05m
Southwest
Deal found 2/18![Southwest logo]()
$419
This Delta deal was found by Cheapflights users on 2/17. 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.
Fri 5/87:05 am
ONT
- SJU
1 stop12h 12m
Delta
Sat 5/167:30 am
SJU
- ONT
1 stop14h 06m
Delta
Deal found 2/17![Delta logo]()
$421
This Delta deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:04 pm
ONT
- SJU
1 stop9h 42m
Delta
Wed 5/207:30 am
SJU
- ONT
1 stop14h 06m
Delta
Deal found 2/19![Delta logo]()
$446
This Southwest deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:55 pm
ONT
- SJU
2 stops12h 15m
Southwest
Fri 5/225:35 am
SJU
- ONT
1 stop12h 40m
Southwest
Deal found 2/18![Southwest logo]()
$499
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/35:00 pm
ONT
- SJU
2 stops17h 32m
Delta
Tue 3/101:00 pm
SJU
- ONT
1 stop11h 00m
Delta
Deal found 2/20![Delta logo]()
$460
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/196:00 am
ONT
- BQN
2 stops14h 09m
United Airlines
Wed 6/312:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 2/18![United Airlines logo]()
$606
This Expedia deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1811:59 pm
ONT
- BQN
1 stop11h 23m
JetBlue
Thu 6/258:37 am
BQN
- ONT
2 stops17h 03m
JetBlue
Deal found 2/19![JetBlue logo]()
$1,300
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/410:20 pm
ONT
- SJU
1 stop10h 41m
Delta
Thu 3/121:00 pm
SJU
- ONT
1 stop11h 00m
Delta
Deal found 2/20![Delta logo]()
$495
This Delta deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/610:20 pm
ONT
- SJU
1 stop12h 12m
Delta
Tue 3/101:00 pm
SJU
- ONT
1 stop11h 00m
Delta
Deal found 2/18![Delta logo]()
$495
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/15:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Mon 6/812:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 2/19![United Airlines logo]()
$687
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/185:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Wed 6/2412:15 am
BQN
- ONT
2 stops15h 05m
United Airlines
Deal found 2/19![United Airlines logo]()
$793
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:30 am
ONT
- BQN
2 stops13h 39m
United Airlines
Thu 5/2812:15 am
BQN
- ONT
2 stops15h 32m
United Airlines
Deal found 2/19![United Airlines logo]()
$845
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/811:59 pm
ONT
- BQN
3 stops19h 58m
United Airlines
Wed 3/1112:09 am
BQN
- ONT
2 stops15h 39m
United Airlines
Deal found 2/21![United Airlines logo]()
$940
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated February 21, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated February 21, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/275:00 am
ONT
- BQN
2 stops14h 57m
United Airlines
Sun 3/11:09 am
BQN
- ONT
2 stops20h 32m
United Airlines
Deal found 2/19![United Airlines logo]()
$745
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/288:21 am
ONT
- SJU
1 stop23h 16m
Multiple Airlines
Wed 3/44:06 pm
SJU
- ONT
2 stops25h 05m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$417
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/287:00 am
ONT
- SJU
1 stop12h 31m
American Airlines
Sat 3/77:00 am
SJU
- ONT
2 stops15h 42m
American Airlines
Deal found 2/18![American Airlines logo]()
$440
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Mon 3/25:00 am
ONT
- BQN
2 stops14h 57m
United Airlines
Tue 3/31:09 am
BQN
- ONT
2 stops15h 39m
United Airlines
Deal found 2/17![United Airlines logo]()
$753
This Delta deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/510:20 pm
ONT
- SJU
1 stop10h 41m
Delta
Tue 3/101:00 pm
SJU
- ONT
1 stop11h 00m
Delta
Deal found 2/18![Delta logo]()
$459
This Delta deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/910:25 pm
ONT
- SJU
1 stop12h 02m
Delta
Thu 3/121:00 pm
SJU
- ONT
1 stop11h 00m
Delta
Deal found 2/20![Delta logo]()
$430
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:59 pm
ONT
- SJU
1 stop16h 40m
American Airlines
Thu 3/127:40 am
SJU
- ONT
1 stop16h 44m
American Airlines
Deal found 2/18![American Airlines logo]()
$439
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/185:10 pm
ONT
- SJU
2 stops28h 38m
Multiple Airlines
Wed 3/256:55 pm
SJU
- ONT
1 stop24h 20m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$457
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/235:20 pm
ONT
- SJU
1 stop14h 47m
Multiple Airlines
Wed 3/2512:05 pm
SJU
- ONT
2 stops31h 10m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$450
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/244:00 pm
ONT
- SJU
1 stop16h 07m
Multiple Airlines
Tue 3/317:54 pm
SJU
- ONT
2 stops23h 29m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$406
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:15 am
ONT
- SJU
2 stops25h 55m
Multiple Airlines
Wed 3/256:55 pm
SJU
- ONT
1 stop24h 20m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$420
This Kiwi.com deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/244:00 pm
ONT
- SJU
1 stop16h 07m
Multiple Airlines
Thu 4/26:07 pm
SJU
- ONT
2 stops32h 49m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$455
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 February 21, 2026.
Search for one-way flight options from Ontario to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated February 21, 2026.
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:05 am
ONT
- SJU
1 stop10h 01m
Delta
Deal found 2/21![Delta logo]()
$168
This United Airlines deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/1611:59 pm
ONT
- SJU
1 stop11h 41m
United Airlines
Deal found 2/21![United Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 2/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/15:18 pm
ONT
- SJU
2 stops28h 59m
Frontier
Deal found 2/19![Frontier logo]()
$176
This Delta deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2510:15 pm
ONT
- SJU
1 stop12h 10m
Delta
Deal found 2/18![Delta logo]()
$178
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/216:00 am
ONT
- SJU
1 stop14h 02m
American Airlines
Deal found 2/18![American Airlines logo]()
$188
This United Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 2/20![United Airlines logo]()
$192
This American Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/237:35 pm
ONT
- SJU
2 stops24h 27m
American Airlines
Deal found 2/18![American Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/165:20 pm
ONT
- SJU
2 stops23h 30m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$195
This United Airlines deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Deal found 2/18![United Airlines logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 2/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/265:13 pm
ONT
- SJU
2 stops29h 08m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$203
This Delta deal was found by Cheapflights users on 2/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/1710:25 pm
ONT
- SJU
1 stop10h 21m
Delta
Deal found 2/21![Delta logo]()
$205
This American Airlines deal was found by Cheapflights users on 2/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:19 pm
ONT
- SJU
2 stops19h 34m
American Airlines
Deal found 2/20![American Airlines logo]()
$208
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 February 21, 2026.
Round-trip from | $314 (United Airlines) |
|---|---|
One-way from | $168 (Delta) |
Popular in | December |
Cheapest in | October |
Average price | $443 |
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 February 21, 2026.
Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.
Fly from
Ontario
Fly to
Puerto Rico
Route
Depart
Return
Price
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 5/9
11:04 pm-11:46 am
1 stop9h 42m
San Juan Luis Munoz Marin Intl
Wed 5/13
12:50 pm-9:54 pm
1 stop12h 04m
$372
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 4/13
8:45 pm-10:35 am
2 stops10h 50m
San Juan Luis Munoz Marin Intl
Thu 5/14
5:35 am-3:15 pm
1 stop12h 40m
$390
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 7/14
1:05 pm-12:45 am
1 stop8h 40m
San Juan Luis Munoz Marin Intl
Tue 7/21
5:00 am-12:05 pm
1 stop10h 05m
$419
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 5/8
7:05 am-10:17 pm
1 stop12h 12m
San Juan Luis Munoz Marin Intl
Sat 5/16
7:30 am-6:36 pm
1 stop14h 06m
$421
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 5/16
11:04 pm-11:46 am
1 stop9h 42m
San Juan Luis Munoz Marin Intl
Wed 5/20
7:30 am-6:36 pm
1 stop14h 06m
$446
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 3/3
5:00 pm-2:32 pm
2 stops17h 32m
San Juan Luis Munoz Marin Intl
Tue 3/10
1:00 pm-9:00 pm
1 stop11h 00m
$460
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Tue 5/19
5:00 am-11:09 pm
2 stops15h 09m
Aguadilla Borinquen
Sat 5/23
12:15 am-12:47 pm
2 stops15h 32m
$495
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 3/4
10:20 pm-1:01 pm
1 stop10h 41m
San Juan Luis Munoz Marin Intl
Thu 3/12
1:00 pm-9:00 pm
1 stop11h 00m
$495
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 3/6
10:20 pm-2:32 pm
1 stop12h 12m
San Juan Luis Munoz Marin Intl
Tue 3/10
1:00 pm-9:00 pm
1 stop11h 00m
$495
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 4/30
9:55 pm-1:10 pm
2 stops12h 15m
San Juan Luis Munoz Marin Intl
Fri 5/22
5:35 am-3:15 pm
1 stop12h 40m
$499
Showing 1-10 of 28 results
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, April is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $145). 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 February 21, 2026.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Comfort
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 February 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Ontario to Puerto Rico flights
Consider these flights traveling from Ontario to Puerto Rico.
Top 5 airlines flying from Ontario to Puerto Rico
Discover the top 5 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 February 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$509 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$530 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$321 | Average$533 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$365 | Average$621 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$480 | Average$595 | FlexibilityNo cancel fee | On-time63% |