$167+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Apr 14 — Apr 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
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 March 15, 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 15, 2026.
This Frontier deal was found by Cheapflights users on 3/13. 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 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 3/13![Frontier logo]()
$296
This Expedia deal was found by Cheapflights users on 3/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/144:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 8/196:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/14![Frontier logo]()
$331
This American Airlines deal was found by Cheapflights users on 3/13. 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.
Sat 10/318:00 pm
ONT
- SJU
2 stops14h 04m
American Airlines
Wed 11/42:41 pm
SJU
- ONT
2 stops13h 16m
American Airlines
Deal found 3/13![American Airlines logo]()
$334
This Frontier deal was found by Cheapflights users on 3/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/154:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 8/196:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/13![Frontier logo]()
$336
This Frontier deal was found by Cheapflights users on 3/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/174:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Sat 8/226:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/14![Frontier logo]()
$351
This American Airlines deal was found by Cheapflights users on 3/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1511:59 pm
ONT
- SJU
1 stop11h 04m
American Airlines
Tue 9/292:05 pm
SJU
- ONT
2 stops13h 12m
American Airlines
Deal found 3/14![American Airlines logo]()
$354
This Delta deal was found by Cheapflights users on 3/10. 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.
Tue 9/157:00 am
ONT
- SJU
1 stop12h 00m
Delta
Tue 9/297:30 am
SJU
- ONT
1 stop13h 31m
Delta
Deal found 3/10![Delta logo]()
$356
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
ONT
- SJU
2 stops12h 24m
United Airlines
Wed 5/61:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/10![United Airlines logo]()
$359
This Frontier deal was found by Cheapflights users on 3/14. 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 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
Thu 8/206:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/14![Frontier logo]()
$361
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/155:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Tue 9/292:55 pm
SJU
- ONT
1 stop9h 26m
United Airlines
Deal found 3/10![United Airlines logo]()
$364
This Frontier deal was found by Cheapflights users on 3/13. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/154:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Thu 8/206:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/13![Frontier logo]()
$376
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/309:49 pm
ONT
- BQN
2 stops24h 53m
Frontier
Sat 4/46:28 pm
BQN
- ONT
2 stops52h 39m
Frontier
Deal found 3/11![Frontier logo]()
$580
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 15, 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 15, 2026.
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
ONT
- SJU
2 stops12h 24m
United Airlines
Wed 5/61:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/10![United Airlines logo]()
$359
This Southwest deal was found by Cheapflights users on 3/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/228:45 pm
ONT
- SJU
2 stops10h 40m
Southwest
Fri 7/1010:20 am
SJU
- ONT
1 stop15h 05m
Southwest
Deal found 3/14![Southwest logo]()
$563
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Mon 4/205:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Tue 4/282:55 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 3/10![United Airlines logo]()
$424
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/276:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Wed 4/291:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/12![United Airlines logo]()
$464
This Southwest deal was found by Cheapflights users on 3/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/89:45 am
ONT
- SJU
2 stops11h 20m
Southwest
Sun 6/145:45 am
SJU
- ONT
1 stop13h 30m
Southwest
Deal found 3/12![Southwest logo]()
$607
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/126:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Sat 4/182:55 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 3/10![United Airlines logo]()
$519
This United Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/265:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Tue 5/52:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 3/15![United Airlines logo]()
$529
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Mon 5/42:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 3/10![United Airlines logo]()
$587
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Tue 5/52:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 3/11![United Airlines logo]()
$614
This United Airlines deal was found by Cheapflights users on 3/11. 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 5/135:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Sat 5/1612:15 am
BQN
- ONT
2 stops25h 20m
United Airlines
Deal found 3/11![United Airlines logo]()
$735
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/205:10 am
ONT
- BQN
2 stops14h 59m
United Airlines
Wed 4/2212:15 am
BQN
- ONT
2 stops25h 30m
United Airlines
Deal found 3/12![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/116:30 am
ONT
- BQN
2 stops37h 39m
United Airlines
Sun 6/2112:15 am
BQN
- ONT
2 stops24h 40m
United Airlines
Deal found 3/15![United Airlines logo]()
$956
This United Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/1411:05 am
ONT
- BQN
2 stops33h 04m
United Airlines
Fri 4/2412:15 am
BQN
- ONT
2 stops20h 32m
United Airlines
Deal found 3/15![United Airlines logo]()
$1,035
This United Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/305:10 am
ONT
- BQN
3 stops14h 59m
United Airlines
Wed 4/112:15 am
BQN
- ONT
2 stops15h 05m
United Airlines
Deal found 3/11![United Airlines logo]()
$1,127
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated March 15, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated March 15, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 3/12. 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 3/175:15 am
ONT
- BQN
2 stops14h 42m
United Airlines
Mon 3/2312:09 am
BQN
- ONT
2 stops15h 09m
United Airlines
Deal found 3/12![United Airlines logo]()
$780
This United Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:00 am
ONT
- BQN
2 stops13h 57m
United Airlines
Thu 3/1912:09 am
BQN
- ONT
2 stops25h 48m
United Airlines
Deal found 3/15![United Airlines logo]()
$968
This Trip.com deal was found by Cheapflights users on 3/11. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/309:49 pm
ONT
- BQN
2 stops24h 53m
Frontier
Sat 4/46:28 pm
BQN
- ONT
2 stops52h 39m
Frontier
Deal found 3/11![Frontier logo]()
$580
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/86:20 am
ONT
- SJU
2 stops39h 57m
Multiple Airlines
Fri 4/106:55 pm
SJU
- ONT
1 stop26h 50m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$462
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
Sat 4/116:20 am
ONT
- SJU
2 stops27h 01m
Multiple Airlines
Sat 4/185:45 am
SJU
- ONT
1 stop19h 52m
Multiple Airlines
Deal found 3/14![Multiple Airlines logo]()
$448
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 4/117:40 pm
ONT
- SJU
1 stop12h 27m
Multiple Airlines
Tue 4/1412:55 pm
SJU
- ONT
2 stops45h 36m
Multiple Airlines
Deal found 3/13![Multiple Airlines logo]()
$467
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/205:10 am
ONT
- BQN
2 stops14h 59m
United Airlines
Wed 4/2212:15 am
BQN
- ONT
2 stops25h 30m
United Airlines
Deal found 3/12![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 3/10. 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.
Fri 4/246:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Sat 5/27:40 am
SJU
- ONT
1 stop13h 21m
United Airlines
Deal found 3/10![United Airlines logo]()
$402
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/276:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Wed 4/291:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/12![United Airlines logo]()
$464
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Tue 4/284:52 pm
ONT
- SJU
2 stops13h 21m
American Airlines
Thu 5/711:59 pm
SJU
- ONT
1 stop13h 10m
American Airlines
Deal found 3/10![American Airlines logo]()
$334
This United Airlines deal was found by Cheapflights users on 3/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
ONT
- SJU
2 stops12h 24m
United Airlines
Wed 5/61:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 3/10![United Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Wed 4/292:08 pm
ONT
- SJU
1 stop11h 24m
American Airlines
Thu 5/711:59 pm
SJU
- ONT
1 stop13h 10m
American Airlines
Deal found 3/10![American Airlines logo]()
$450
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 15, 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 15, 2026.
This American Airlines deal was found by Cheapflights users on 3/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/2711:29 pm
ONT
- SJU
1 stop9h 34m
American Airlines
Deal found 3/12![American Airlines logo]()
$167
This Trip.com deal was found by Cheapflights users on 3/10. 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.
Tue 3/316:15 am
ONT
- SJU
2 stops16h 48m
Frontier
Deal found 3/10![Frontier logo]()
$170
This Kiwi.com deal was found by Cheapflights users on 3/14. 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.
Wed 6/310:50 am
ONT
- SJU
2 stops26h 00m
Frontier
Deal found 3/14![Frontier logo]()
$185
This Super.com deal was found by Cheapflights users on 3/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/64:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Deal found 3/10![Frontier logo]()
$186
This Frontier deal was found by Cheapflights users on 3/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/94:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Deal found 3/10![Frontier logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/76:00 am
ONT
- SJU
2 stops43h 01m
Frontier
Deal found 3/11![Frontier logo]()
$195
This Kiwi.com deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/88:06 pm
ONT
- SJU
2 stops23h 37m
Frontier
Deal found 3/11![Frontier logo]()
$203
This United Airlines deal was found by Cheapflights users on 3/11. 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.
Sun 4/55:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Deal found 3/11![United Airlines logo]()
$212
This American Airlines deal was found by Cheapflights users on 3/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/811:59 pm
ONT
- SJU
1 stop11h 43m
American Airlines
Deal found 3/11![American Airlines logo]()
$219
This United Airlines deal was found by Cheapflights users on 3/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/145:10 am
ONT
- SJU
2 stops13h 14m
United Airlines
Deal found 3/15![United Airlines logo]()
$222
This Frontier deal was found by Cheapflights users on 3/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/84:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Deal found 3/10![Frontier logo]()
$223
This Delta deal was found by Cheapflights users on 3/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:05 am
ONT
- SJU
1 stop12h 12m
Delta
Deal found 3/14![Delta logo]()
$229
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 15, 2026.
Round-trip from | $296 (Frontier) |
|---|---|
One-way from | $167 (American Airlines) |
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 15, 2026.
Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 4/28
6:00 am-9:24 pm
2 stops12h 24m
San Juan Luis Munoz Marin Intl
Wed 5/6
1:00 am-12:22 pm
2 stops14h 22m
$359
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 4/20
5:10 am-5:38 pm
1 stop9h 28m
San Juan Luis Munoz Marin Intl
Tue 4/28
2:55 pm-9:50 pm
1 stop9h 55m
$424
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 4/27
6:05 am-8:38 pm
1 stop11h 33m
San Juan Luis Munoz Marin Intl
Wed 4/29
1:00 am-12:22 pm
2 stops14h 22m
$464
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 4/12
6:05 am-8:38 pm
1 stop11h 33m
San Juan Luis Munoz Marin Intl
Sat 4/18
2:55 pm-9:50 pm
1 stop9h 55m
$519
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 4/26
5:10 am-5:38 pm
1 stop9h 28m
San Juan Luis Munoz Marin Intl
Tue 5/5
2:55 pm-9:58 pm
1 stop10h 03m
$529
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 6/22
8:45 pm-10:25 am
2 stops10h 40m
San Juan Luis Munoz Marin Intl
Fri 7/10
10:20 am-10:25 pm
1 stop15h 05m
$563
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 4/28
7:00 am-8:34 pm
1 stop10h 34m
San Juan Luis Munoz Marin Intl
Mon 5/4
2:55 pm-9:58 pm
1 stop10h 03m
$587
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 6/8
9:45 am-12:05 am
2 stops11h 20m
San Juan Luis Munoz Marin Intl
Sun 6/14
5:45 am-4:15 pm
1 stop13h 30m
$607
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 5/1
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Tue 5/5
2:55 pm-9:58 pm
1 stop10h 03m
$614
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Wed 5/13
5:00 am-11:09 pm
2 stops15h 09m
Aguadilla Borinquen
Sat 5/16
12:15 am-10:35 pm
2 stops25h 20m
$735
Showing 1-10 of 24 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 15, 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.
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
Comfort
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Entertainment
7.5
Overall
8.0
Crew
8.6
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
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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 15, 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 15, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$509 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$597 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$321 | Average$549 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$365 | Average$602 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$445 | Average$570 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$467 | FlexibilityNo cancel fee | On-time62% |