$174+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Apr 21 — Apr 281
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 March 22, 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 March 22, 2026.
This Frontier deal was found by Cheapflights users on 3/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 8/196:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/18![Frontier logo]()
$276
This Delta deal was found by Cheapflights users on 3/18. 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 5/210:15 pm
ONT
- SJU
1 stop10h 30m
Delta
Wed 5/612:55 pm
SJU
- ONT
1 stop11h 05m
Delta
Deal found 3/18![Delta logo]()
$354
This Frontier deal was found by Cheapflights users on 3/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/104:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 8/196:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/18![Frontier logo]()
$361
This Frontier deal was found by Cheapflights users on 3/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/54:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 8/126:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/17![Frontier logo]()
$366
This Priceline deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/24:15 pm
ONT
- SJU
1 stop10h 38m
Multiple Airlines
Wed 9/161:25 pm
SJU
- ONT
1 stop11h 04m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$368
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:59 pm
ONT
- SJU
1 stop9h 37m
Delta
Fri 11/61:46 pm
SJU
- ONT
1 stop12h 28m
Delta
Deal found 3/18![Delta logo]()
$388
This American Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 5/110:26 pm
ONT
- SJU
1 stop19h 25m
American Airlines
Wed 5/67:25 am
SJU
- ONT
1 stop16h 42m
American Airlines
Deal found 3/20![American Airlines logo]()
$402
This Frontier deal was found by Cheapflights users on 3/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/44:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 8/126:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/18![Frontier logo]()
$406
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:00 am
ONT
- SJU
2 stops13h 50m
United Airlines
Thu 4/301:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/22![United Airlines logo]()
$411
This Delta deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2510:59 pm
ONT
- SJU
1 stop9h 37m
Delta
Wed 11/43:31 pm
SJU
- ONT
1 stop10h 43m
Delta
Deal found 3/18![Delta logo]()
$412
This United Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Thu 4/161:00 am
SJU
- ONT
2 stops14h 20m
United Airlines
Deal found 3/21![United Airlines logo]()
$415
This Frontier deal was found by Cheapflights users on 3/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Tue 8/186:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/18![Frontier logo]()
$418
Best flights from Ontario to Puerto RicoDiscover carefully curated flight deals from Ontario to Puerto Rico that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 22, 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 March 22, 2026.
This Southwest deal was found by Cheapflights users on 3/18. 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.
Fri 5/19:55 pm
ONT
- SJU
1 stop9h 30m
Southwest
Fri 5/85:05 am
SJU
- ONT
2 stops12h 15m
Southwest
Deal found 3/18![Southwest logo]()
$428
This Delta deal was found by Cheapflights users on 3/17. 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 5/810:00 pm
ONT
- SJU
1 stop12h 38m
Delta
Sat 5/162:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 3/17![Delta logo]()
$477
This Trip.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/56:43 pm
ONT
- BQN
2 stops28h 10m
Frontier
Tue 4/72:43 am
BQN
- ONT
2 stops41h 32m
Frontier
Deal found 3/22![Frontier logo]()
$532
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Wed 7/295:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Tue 8/117:20 am
SJU
- ONT
2 stops13h 59m
United Airlines
Deal found 3/18![United Airlines logo]()
$558
This Southwest deal was found by Cheapflights users on 3/18. 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.
Mon 6/88:45 pm
ONT
- SJU
2 stops10h 40m
Southwest
Sun 6/145:20 am
SJU
- ONT
1 stop13h 35m
Southwest
Deal found 3/18![Southwest logo]()
$523
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Fri 8/147:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Mon 8/172:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 3/18![United Airlines logo]()
$560
This Delta deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/1710:15 pm
ONT
- SJU
1 stop10h 30m
Delta
Fri 4/2412:55 pm
SJU
- ONT
1 stop11h 05m
Delta
Deal found 3/20![Delta logo]()
$604
This Southwest deal was found by Cheapflights users on 3/17. 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.
Wed 7/81:05 pm
ONT
- SJU
1 stop8h 40m
Southwest
Mon 7/136:30 am
SJU
- ONT
2 stops12h 30m
Southwest
Deal found 3/17![Southwest logo]()
$567
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 4/175:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Wed 4/222:55 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 3/20![United Airlines logo]()
$604
This Delta deal was found by Cheapflights users on 3/17. 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.
Wed 6/310:00 pm
ONT
- SJU
1 stop12h 38m
Delta
Mon 6/152:35 pm
SJU
- ONT
2 stops12h 09m
Delta
Deal found 3/17![Delta logo]()
$718
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Fri 5/15:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Wed 5/612:15 am
BQN
- ONT
2 stops15h 07m
United Airlines
Deal found 3/18![United Airlines logo]()
$672
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 4/105:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Tue 4/142:55 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 3/20![United Airlines logo]()
$675
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Fri 5/295:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Tue 6/22:05 am
SJU
- ONT
2 stops13h 07m
United Airlines
Deal found 3/17![United Airlines logo]()
$705
This United Airlines deal was found by Cheapflights users on 3/18. 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 8/15:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Fri 8/77:20 am
SJU
- ONT
2 stops18h 31m
United Airlines
Deal found 3/18![United Airlines logo]()
$708
This United Airlines deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:45 am
ONT
- BQN
2 stops14h 24m
United Airlines
Thu 6/1812:15 am
BQN
- ONT
2 stops24h 40m
United Airlines
Deal found 3/17![United Airlines logo]()
$772
This United Airlines deal was found by Cheapflights users on 3/18. 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.
Fri 4/245:10 am
ONT
- BQN
2 stops14h 59m
United Airlines
Tue 4/2812:15 am
BQN
- ONT
2 stops15h 05m
United Airlines
Deal found 3/18![United Airlines logo]()
$801
This United Airlines deal was found by Cheapflights users on 3/17. 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 4/205:10 am
ONT
- BQN
2 stops14h 59m
United Airlines
Wed 4/2212:15 am
BQN
- ONT
2 stops25h 30m
United Airlines
Deal found 3/17![United Airlines logo]()
$827
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Tue 5/266:30 am
ONT
- BQN
2 stops13h 39m
United Airlines
Sun 5/3112:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 3/17![United Airlines logo]()
$868
This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/116:59 pm
ONT
- BQN
3 stops25h 10m
United Airlines
Thu 5/1412:15 am
BQN
- ONT
2 stops25h 20m
United Airlines
Deal found 3/20![United Airlines logo]()
$871
This United Airlines deal was found by Cheapflights users on 3/20. 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 4/45:10 am
ONT
- BQN
3 stops14h 59m
United Airlines
Tue 4/712:15 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 3/20![United Airlines logo]()
$993
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Fri 4/176:45 pm
ONT
- BQN
2 stops25h 24m
United Airlines
Fri 4/2412:15 am
BQN
- ONT
2 stops15h 05m
United Airlines
Deal found 3/20![United Airlines logo]()
$997
This United Airlines deal was found by Cheapflights users on 3/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/185:10 am
ONT
- BQN
3 stops14h 59m
United Airlines
Fri 4/2412:15 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 3/18![United Airlines logo]()
$1,010
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated March 22, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated March 22, 2026 and is based on user searches.
This Trip.com deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/56:43 pm
ONT
- BQN
2 stops28h 10m
Frontier
Tue 4/72:43 am
BQN
- ONT
2 stops41h 32m
Frontier
Deal found 3/22![Frontier logo]()
$532
This American Airlines deal was found by Cheapflights users on 3/18. 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.
Fri 4/1010:26 pm
ONT
- SJU
1 stop19h 25m
American Airlines
Thu 4/1611:59 pm
SJU
- ONT
1 stop13h 10m
American Airlines
Deal found 3/18![American Airlines logo]()
$484
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Tue 4/146:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Tue 4/211:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 3/17![United Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/156:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Thu 4/161:00 am
SJU
- ONT
2 stops14h 20m
United Airlines
Deal found 3/21![United Airlines logo]()
$415
This Delta deal was found by Cheapflights users on 3/20. 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.
Sat 4/1810:15 pm
ONT
- SJU
1 stop10h 30m
Delta
Fri 4/2412:55 pm
SJU
- ONT
1 stop11h 05m
Delta
Deal found 3/20![Delta logo]()
$388
This Delta deal was found by Cheapflights users on 3/20. 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.
Sun 4/1910:15 pm
ONT
- SJU
1 stop12h 10m
Delta
Fri 4/2412:55 pm
SJU
- ONT
1 stop11h 05m
Delta
Deal found 3/20![Delta logo]()
$446
This Kiwi.com deal was found by Cheapflights users on 3/21. 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 4/218:15 am
ONT
- SJU
1 stop11h 55m
Multiple Airlines
Sun 4/261:59 am
SJU
- ONT
2 stops48h 56m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$475
This American Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/256:00 am
ONT
- SJU
1 stop14h 02m
American Airlines
Fri 5/17:25 am
SJU
- ONT
1 stop16h 42m
American Airlines
Deal found 3/22![American Airlines logo]()
$354
This United Airlines deal was found by Cheapflights users on 3/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:00 am
ONT
- SJU
2 stops13h 50m
United Airlines
Thu 4/301:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/22![United Airlines logo]()
$411
This American Airlines deal was found by Cheapflights users on 3/18. 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 4/277:35 pm
ONT
- SJU
2 stops13h 28m
American Airlines
Mon 5/411:59 pm
SJU
- ONT
1 stop13h 10m
American Airlines
Deal found 3/18![American Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:49 pm
ONT
- SJU
2 stops15h 56m
United Airlines
Wed 4/291:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/20![United Airlines logo]()
$478
This Kiwi.com deal was found by Cheapflights users on 3/21. 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.
Wed 4/298:05 am
ONT
- SJU
1 stop12h 05m
Multiple Airlines
Mon 5/46:30 am
SJU
- ONT
2 stops44h 19m
Multiple Airlines
Deal found 3/21![Multiple Airlines logo]()
$448
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 March 22, 2026.
Search for one-way flight options from Ontario to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated March 22, 2026.
This Trip.com deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/1811:44 am
ONT
- SJU
2 stops27h 23m
Frontier
Deal found 3/19![Frontier logo]()
$174
This Delta deal was found by Cheapflights users on 3/19. 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 4/1810:15 pm
ONT
- SJU
1 stop10h 30m
Delta
Deal found 3/19![Delta logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1412:59 am
ONT
- SJU
2 stops43h 30m
Frontier
Deal found 3/17![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1511:44 am
ONT
- SJU
3 stops32h 45m
Multiple Airlines
Deal found 3/17![Multiple Airlines logo]()
$204
This Delta deal was found by Cheapflights users on 3/19. 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 4/2110:15 pm
ONT
- SJU
1 stop10h 30m
Delta
Deal found 3/19![Delta logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 3/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/26:00 am
ONT
- SJU
2 stops32h 14m
Frontier
Deal found 3/17![Frontier logo]()
$212
This Southwest deal was found by Cheapflights users on 3/18. 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.
Wed 6/248:25 pm
ONT
- SJU
2 stops11h 20m
Southwest
Deal found 3/18![Southwest logo]()
$217
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 4/2212:59 am
ONT
- SJU
3 stops20h 59m
Multiple Airlines
Deal found 3/19![Multiple Airlines logo]()
$218
This United Airlines deal was found by Cheapflights users on 3/20. 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 4/187:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Deal found 3/20![United Airlines logo]()
$222
This United Airlines deal was found by Cheapflights users on 3/21. 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.
Sat 4/256:05 am
ONT
- BQN
2 stops14h 04m
United Airlines
Deal found 3/21![United Airlines logo]()
$222
This Frontier deal was found by Cheapflights users on 3/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/174:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Deal found 3/18![Frontier logo]()
$223
This American Airlines deal was found by Cheapflights users on 3/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:17 am
ONT
- SJU
2 stops13h 39m
American Airlines
Deal found 3/19![American Airlines logo]()
$225
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 March 22, 2026.
Round-trip from | $276 (Frontier) |
|---|---|
One-way from | $174 (Trip.com) |
Popular in | December |
Cheapest in | October |
Average price | $495 |
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 March 22, 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 5/1
9:55 pm-10:25 am
1 stop9h 30m
San Juan Luis Munoz Marin Intl
Fri 5/8
5:05 am-2:20 pm
2 stops12h 15m
$428
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 5/8
10:00 pm-1:38 pm
1 stop12h 38m
San Juan Luis Munoz Marin Intl
Sat 5/16
2:48 pm-9:48 pm
1 stop10h 00m
$477
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 6/8
8:45 pm-10:25 am
2 stops10h 40m
San Juan Luis Munoz Marin Intl
Sun 6/14
5:20 am-3:55 pm
1 stop13h 35m
$523
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Sun 4/5
6:43 pm-1:53 am
2 stops28h 10m
Aguadilla Borinquen
Tue 4/7
2:43 am-5:15 pm
2 stops41h 32m
$532
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 7/29
5:45 am-8:38 pm
1 stop11h 53m
San Juan Luis Munoz Marin Intl
Tue 8/11
7:20 am-6:19 pm
2 stops13h 59m
$558
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 8/14
7:13 pm-3:42 pm
2 stops17h 29m
San Juan Luis Munoz Marin Intl
Mon 8/17
2:20 pm-9:59 pm
1 stop10h 39m
$560
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 7/8
1:05 pm-12:45 am
1 stop8h 40m
San Juan Luis Munoz Marin Intl
Mon 7/13
6:30 am-4:00 pm
2 stops12h 30m
$567
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 4/17
10:15 pm-11:45 am
1 stop10h 30m
San Juan Luis Munoz Marin Intl
Fri 4/24
12:55 pm-9:00 pm
1 stop11h 05m
$604
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 4/17
5:10 am-5:38 pm
1 stop9h 28m
San Juan Luis Munoz Marin Intl
Wed 4/22
2:55 pm-9:50 pm
1 stop9h 55m
$604
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Fri 5/1
5:00 am-11:09 pm
2 stops15h 09m
Aguadilla Borinquen
Wed 5/6
12:15 am-12:22 pm
2 stops15h 07m
$672
Showing 1-10 of 42 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, April is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $141). 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 March 22, 2026.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Comfort
8.0
Boarding
8.1
Entertainment
7.5
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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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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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 March 22, 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 March 22, 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$551 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$365 | Average$577 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$445 | Average$560 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$492 | FlexibilityNo cancel fee | On-time62% |