$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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Mar 18 — Mar 251
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 16, 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 16, 2026.
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Wed 5/137:20 am
SJU
- ONT
2 stops18h 10m
United Airlines
Deal found 2/13![United Airlines logo]()
$294
This United Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 5/151:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 2/14![United Airlines logo]()
$319
This United Airlines deal was found by Cheapflights users on 2/12. 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 5/56:00 am
ONT
- SJU
2 stops12h 24m
United Airlines
Tue 5/127:20 am
SJU
- ONT
2 stops16h 16m
United Airlines
Deal found 2/12![United Airlines logo]()
$320
This United Airlines deal was found by Cheapflights users on 2/15. 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 5/55:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 5/81:00 am
SJU
- ONT
2 stops14h 22m
United Airlines
Deal found 2/15![United Airlines logo]()
$334
This Delta deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/911:04 pm
ONT
- SJU
1 stop9h 42m
Delta
Thu 5/1412:50 pm
SJU
- ONT
1 stop12h 04m
Delta
Deal found 2/13![Delta logo]()
$336
This Southwest deal was found by Cheapflights users on 2/12. 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.
Tue 5/59:55 pm
ONT
- SJU
1 stop12h 15m
Southwest
Tue 5/125:05 am
SJU
- ONT
1 stop14h 15m
Southwest
Deal found 2/12![Southwest logo]()
$346
This United Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Sat 5/167:40 am
SJU
- ONT
1 stop13h 21m
United Airlines
Deal found 2/14![United Airlines logo]()
$371
This Delta deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/911:04 pm
ONT
- SJU
1 stop9h 42m
Delta
Wed 5/132:20 pm
SJU
- ONT
1 stop10h 34m
Delta
Deal found 2/13![Delta logo]()
$372
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/231:18 pm
ONT
- SJU
2 stops13h 11m
United Airlines
Fri 5/291:00 am
SJU
- ONT
2 stops14h 12m
United Airlines
Deal found 2/13![United Airlines logo]()
$373
This American Airlines deal was found by Cheapflights users on 2/13. 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 5/910:26 pm
ONT
- SJU
1 stop9h 22m
American Airlines
Fri 5/155:45 am
SJU
- ONT
2 stops19h 51m
American Airlines
Deal found 2/13![American Airlines logo]()
$376
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:00 am
ONT
- BQN
2 stops14h 57m
United Airlines
Tue 3/31:09 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 2/13![United Airlines logo]()
$557
This United Airlines deal was found by Cheapflights users on 2/12. 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 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 2/12![United Airlines logo]()
$740
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 16, 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 16, 2026.
This United Airlines deal was found by Cheapflights users on 2/12. 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 5/57:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Mon 5/111:00 am
SJU
- ONT
2 stops14h 38m
United Airlines
Deal found 2/12![United Airlines logo]()
$294
This Delta deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:05 am
ONT
- SJU
1 stop12h 12m
Delta
Thu 5/1412:50 pm
SJU
- ONT
1 stop12h 04m
Delta
Deal found 2/13![Delta logo]()
$336
This United Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 5/151:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 2/14![United Airlines logo]()
$319
This Delta deal was found by Cheapflights users on 2/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/57:05 am
ONT
- SJU
1 stop13h 08m
Delta
Sat 5/97:30 am
SJU
- ONT
1 stop14h 06m
Delta
Deal found 2/15![Delta logo]()
$336
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Tue 5/197:20 am
SJU
- ONT
2 stops18h 10m
United Airlines
Deal found 2/13![United Airlines logo]()
$320
This Delta deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:05 am
ONT
- SJU
1 stop12h 12m
Delta
Thu 5/1412:50 pm
SJU
- ONT
1 stop12h 04m
Delta
Deal found 2/13![Delta logo]()
$336
This Delta deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:05 am
ONT
- SJU
1 stop12h 12m
Delta
Fri 5/1512:50 pm
SJU
- ONT
1 stop12h 04m
Delta
Deal found 2/13![Delta logo]()
$336
This Delta deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/107:05 am
ONT
- SJU
1 stop12h 12m
Delta
Fri 5/1512:50 pm
SJU
- ONT
1 stop12h 04m
Delta
Deal found 2/13![Delta logo]()
$336
This United Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Sat 5/167:40 am
SJU
- ONT
1 stop13h 21m
United Airlines
Deal found 2/14![United Airlines logo]()
$371
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Fri 5/155:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 5/291:00 am
SJU
- ONT
2 stops14h 20m
United Airlines
Deal found 2/12![United Airlines logo]()
$380
This United Airlines deal was found by Cheapflights users on 2/12. 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 5/197:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Fri 5/221:00 am
SJU
- ONT
2 stops14h 32m
United Airlines
Deal found 2/12![United Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:00 am
ONT
- BQN
2 stops14h 57m
United Airlines
Tue 3/31:09 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 2/13![United Airlines logo]()
$557
This United Airlines deal was found by Cheapflights users on 2/12. 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 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 2/12![United Airlines logo]()
$740
This United Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” 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 3/35:00 am
ONT
- BQN
2 stops14h 57m
United Airlines
Fri 3/61:09 am
BQN
- ONT
2 stops25h 42m
United Airlines
Deal found 2/16![United Airlines logo]()
$780
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:09 am
ONT
- BQN
2 stops13h 48m
United Airlines
Sun 3/11:09 am
BQN
- ONT
2 stops20h 32m
United Airlines
Deal found 2/13![United Airlines logo]()
$958
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated February 16, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated February 16, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/175:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Sat 2/2110:15 am
SJU
- ONT
2 stops14h 35m
United Airlines
Deal found 2/14![United Airlines logo]()
$505
This American Airlines deal was found by Cheapflights users on 2/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/2310:56 am
ONT
- SJU
1 stop8h 35m
American Airlines
Sat 2/288:40 am
SJU
- ONT
2 stops14h 29m
American Airlines
Deal found 2/15![American Airlines logo]()
$470
This Kiwi.com deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/272:21 pm
ONT
- SJU
1 stop17h 16m
Multiple Airlines
Tue 3/34:11 pm
SJU
- ONT
2 stops33h 23m
Multiple Airlines
Deal found 2/12![Multiple Airlines logo]()
$448
This American Airlines deal was found by Cheapflights users on 2/12. 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.
Fri 2/2711:58 pm
ONT
- SJU
1 stop11h 15m
American Airlines
Tue 3/38:40 am
SJU
- ONT
1 stop15h 05m
American Airlines
Deal found 2/12![American Airlines logo]()
$475
This United Airlines deal was found by Cheapflights users on 2/12. 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.
Sat 2/286:00 am
ONT
- SJU
1 stop11h 26m
United Airlines
Thu 3/53:46 pm
SJU
- ONT
1 stop10h 50m
United Airlines
Deal found 2/12![United Airlines logo]()
$507
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:00 am
ONT
- BQN
2 stops14h 57m
United Airlines
Tue 3/31:09 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 2/13![United Airlines logo]()
$557
This Southwest deal was found by Cheapflights users on 2/12. 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.
Sun 3/19:50 am
ONT
- SJU
2 stops11h 45m
Southwest
Fri 3/66:00 am
SJU
- ONT
1 stop12h 05m
Southwest
Deal found 2/12![Southwest logo]()
$439
This United Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/15:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Thu 3/53:46 pm
SJU
- ONT
1 stop10h 50m
United Airlines
Deal found 2/13![United Airlines logo]()
$500
This Southwest deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” 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 3/28:30 am
ONT
- SJU
2 stops12h 10m
Southwest
Thu 3/56:00 am
SJU
- ONT
1 stop12h 05m
Southwest
Deal found 2/16![Southwest logo]()
$410
This American Airlines deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” 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 3/256:00 am
ONT
- SJU
1 stop13h 31m
American Airlines
Wed 4/16:33 am
SJU
- ONT
1 stop18h 57m
American Airlines
Deal found 2/16![American Airlines logo]()
$504
This Southwest deal was found by Cheapflights users on 2/14. 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.
Wed 3/256:00 am
ONT
- SJU
2 stops10h 30m
Southwest
Wed 4/110:10 am
SJU
- ONT
2 stops15h 10m
Southwest
Deal found 2/14![Southwest logo]()
$513
This Kiwi.com deal was found by Cheapflights users on 2/13. 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 3/255:10 pm
ONT
- SJU
1 stop14h 57m
Multiple Airlines
Mon 3/304:19 pm
SJU
- ONT
2 stops34h 40m
Multiple Airlines
Deal found 2/13![Multiple Airlines logo]()
$514
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 16, 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 16, 2026.
This Delta deal was found by Cheapflights users on 2/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/2410:25 pm
ONT
- SJU
1 stop10h 21m
Delta
Deal found 2/15![Delta logo]()
$168
This American Airlines deal was found by Cheapflights users on 2/13. 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.
Mon 3/911:59 pm
ONT
- SJU
1 stop16h 40m
American Airlines
Deal found 2/13![American Airlines logo]()
$188
This United Airlines deal was found by Cheapflights users on 2/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/217:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Deal found 2/12![United Airlines logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 2/13. 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.
Fri 2/274:46 pm
ONT
- SJU
2 stops37h 31m
Multiple Airlines
Deal found 2/13![Multiple Airlines logo]()
$228
This American Airlines deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2710:37 pm
ONT
- SJU
1 stop19h 12m
American Airlines
Deal found 2/13![American Airlines logo]()
$234
This American Airlines deal was found by Cheapflights users on 2/13. 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.
Thu 2/266:00 am
ONT
- SJU
1 stop13h 31m
American Airlines
Deal found 2/13![American Airlines logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 2/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/262:08 pm
ONT
- SJU
3 stops24h 50m
Multiple Airlines
Deal found 2/13![Multiple Airlines logo]()
$244
This Kiwi.com deal was found by Cheapflights users on 2/13. 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.
Fri 3/279:49 pm
ONT
- SJU
3 stops20h 45m
Multiple Airlines
Deal found 2/13![Multiple Airlines logo]()
$247
This United Airlines deal was found by Cheapflights users on 2/15. 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 3/35:00 am
ONT
- SJU
2 stops15h 36m
United Airlines
Deal found 2/15![United Airlines logo]()
$250
This Trip.com deal was found by Cheapflights users on 2/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/66:15 am
ONT
- SJU
2 stops15h 18m
Frontier
Deal found 2/13![Frontier logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 2/13. 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.
Fri 3/274:22 pm
ONT
- SJU
2 stops26h 12m
Frontier
Deal found 2/13![Frontier logo]()
$254
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 16, 2026.
Round-trip from | $294 (United Airlines) |
|---|---|
One-way from | $168 (Delta) |
Popular in | December |
Cheapest in | October |
Average price | $436 |
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 16, 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
Tue 5/5
7:00 am-8:34 pm
1 stop10h 34m
San Juan Luis Munoz Marin Intl
Mon 5/11
1:00 am-12:38 pm
2 stops14h 38m
$294
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 5/11
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Fri 5/15
1:40 pm-8:36 pm
1 stop9h 56m
$319
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 5/9
7:00 am-8:34 pm
1 stop10h 34m
San Juan Luis Munoz Marin Intl
Tue 5/19
7:20 am-10:30 pm
2 stops18h 10m
$320
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 5/12
7:05 am-10:17 pm
1 stop12h 12m
San Juan Luis Munoz Marin Intl
Thu 5/14
12:50 pm-9:54 pm
1 stop12h 04m
$336
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 5/5
7:05 am-11:13 pm
1 stop13h 08m
San Juan Luis Munoz Marin Intl
Sat 5/9
7:30 am-6:36 pm
1 stop14h 06m
$336
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 5/10
7:05 am-10:17 pm
1 stop12h 12m
San Juan Luis Munoz Marin Intl
Thu 5/14
12:50 pm-9:54 pm
1 stop12h 04m
$336
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 5/12
7:05 am-10:17 pm
1 stop12h 12m
San Juan Luis Munoz Marin Intl
Fri 5/15
12:50 pm-9:54 pm
1 stop12h 04m
$336
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 5/10
7:05 am-10:17 pm
1 stop12h 12m
San Juan Luis Munoz Marin Intl
Fri 5/15
12:50 pm-9:54 pm
1 stop12h 04m
$336
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 5/11
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Sat 5/16
7:40 am-6:01 pm
1 stop13h 21m
$371
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 5/15
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Fri 5/29
1:00 am-12:20 pm
2 stops14h 20m
$380
Showing 1-10 of 25 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 $137). 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 16, 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.
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Crew
8.6
Boarding
8.1
Comfort
8.0
Overall
8.0
Entertainment
7.5
Food
7.0
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 16, 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 16, 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$615 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$465 | Average$595 | FlexibilityNo cancel fee | On-time63% |