$147+ 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 2 — Apr 91
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 3, 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 3, 2026.
This Frontier deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 3/3![Frontier logo]()
$276
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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
1 stop10h 34m
United Airlines
Wed 4/297:20 am
SJU
- ONT
2 stops16h 16m
United Airlines
Deal found 3/1![United Airlines logo]()
$294
This Frontier deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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.
Thu 8/64:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 8/196:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/3![Frontier logo]()
$316
This United Airlines deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” 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 4/266:49 pm
ONT
- SJU
2 stops14h 45m
United Airlines
Wed 5/67:00 am
SJU
- ONT
2 stops13h 52m
United Airlines
Deal found 2/26![United Airlines logo]()
$318
This Delta deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 5/37:05 am
ONT
- SJU
1 stop13h 08m
Delta
Fri 5/87:30 am
SJU
- ONT
1 stop14h 06m
Delta
Deal found 3/1![Delta logo]()
$336
This Frontier deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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
Fri 8/146:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 3/3![Frontier logo]()
$351
This Kiwi.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 4/158:15 am
ONT
- SJU
1 stop11h 55m
Multiple Airlines
Thu 4/237:17 pm
SJU
- ONT
2 stops55h 38m
Multiple Airlines
Deal found 3/3![Multiple Airlines logo]()
$353
This Frontier deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” 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 7/154:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Wed 7/226:15 am
SJU
- ONT
1 stop12h 10m
Frontier
Deal found 2/26![Frontier logo]()
$356
This Delta deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 11/37:00 am
ONT
- SJU
1 stop11h 59m
Delta
Wed 11/111:55 pm
SJU
- ONT
1 stop12h 19m
Delta
Deal found 3/1![Delta logo]()
$367
This Priceline deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:15 pm
ONT
- SJU
1 stop10h 38m
Multiple Airlines
Thu 6/410:00 am
SJU
- ONT
1 stop13h 45m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$368
This American Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 5/212:19 pm
ONT
- SJU
2 stops17h 54m
American Airlines
Thu 5/711:59 pm
SJU
- ONT
2 stops25h 00m
American Airlines
Deal found 3/1![American Airlines logo]()
$376
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 9/127:00 am
ONT
- BQN
2 stops13h 09m
United Airlines
Tue 9/1512:15 am
BQN
- ONT
2 stops15h 23m
United Airlines
Deal found 3/1![United Airlines logo]()
$384
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 3, 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 3, 2026.
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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
Sat 5/307:20 am
SJU
- ONT
2 stops16h 22m
United Airlines
Deal found 3/1![United Airlines logo]()
$401
This Southwest deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 4/157:55 am
ONT
- SJU
2 stops10h 10m
Southwest
Thu 4/235:05 am
SJU
- ONT
2 stops13h 10m
Southwest
Deal found 3/3![Southwest logo]()
$457
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 5/297:05 am
ONT
- SJU
1 stop12h 12m
Delta
Fri 6/52:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 3/3![Delta logo]()
$507
This Southwest deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/99:20 am
ONT
- SJU
2 stops11h 35m
Southwest
Tue 4/145:35 am
SJU
- ONT
2 stops13h 45m
Southwest
Deal found 2/27![Southwest logo]()
$475
This United Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 7/41:18 pm
ONT
- SJU
2 stops13h 11m
United Airlines
Tue 7/142:55 pm
SJU
- ONT
1 stop10h 00m
United Airlines
Deal found 3/2![United Airlines logo]()
$495
This Southwest deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 6/249:55 am
ONT
- SJU
2 stops11h 20m
Southwest
Mon 6/2910:20 am
SJU
- ONT
1 stop15h 05m
Southwest
Deal found 3/1![Southwest logo]()
$483
This United Airlines deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” 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
- BQN
2 stops14h 04m
United Airlines
Fri 5/112:15 am
BQN
- ONT
3 stops20h 37m
United Airlines
Deal found 2/27![United Airlines logo]()
$495
This Southwest deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 5/299:20 am
ONT
- SJU
2 stops11h 35m
Southwest
Mon 6/15:05 am
SJU
- ONT
2 stops13h 10m
Southwest
Deal found 3/1![Southwest logo]()
$536
This United Airlines deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” 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 7/285:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Mon 8/32:55 pm
SJU
- ONT
1 stop10h 00m
United Airlines
Deal found 2/26![United Airlines logo]()
$560
This Southwest deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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.
Sat 7/1110:30 am
ONT
- SJU
2 stops11h 15m
Southwest
Sat 7/185:00 am
SJU
- ONT
1 stop17h 15m
Southwest
Deal found 3/3![Southwest logo]()
$540
This United Airlines deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” 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 4/217:00 am
SJU
- ONT
2 stops14h 02m
United Airlines
Deal found 2/28![United Airlines logo]()
$560
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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
Wed 4/291:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 3/1![United Airlines logo]()
$562
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 4/157:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Tue 5/52:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 3/1![United Airlines logo]()
$594
This United Airlines deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” 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 8/235:45 am
ONT
- BQN
2 stops14h 24m
United Airlines
Sun 8/3012:15 am
BQN
- ONT
2 stops23h 37m
United Airlines
Deal found 2/27![United Airlines logo]()
$890
This United Airlines deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” 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 3/145:15 am
ONT
- BQN
2 stops14h 42m
United Airlines
Mon 3/1612:09 am
BQN
- ONT
2 stops15h 09m
United Airlines
Deal found 2/26![United Airlines logo]()
$918
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated March 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated March 3, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” 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 3/56:15 am
ONT
- BQN
2 stops13h 42m
United Airlines
Wed 3/1112:09 am
BQN
- ONT
2 stops20h 32m
United Airlines
Deal found 2/27![United Airlines logo]()
$835
This Kiwi.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 4/158:15 am
ONT
- SJU
1 stop11h 55m
Multiple Airlines
Thu 4/237:17 pm
SJU
- ONT
2 stops55h 38m
Multiple Airlines
Deal found 3/3![Multiple Airlines logo]()
$353
This Kiwi.com deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:26 am
ONT
- SJU
2 stops35h 58m
Multiple Airlines
Thu 4/235:45 am
SJU
- ONT
1 stop21h 10m
Multiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$426
This Southwest deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 4/179:55 pm
ONT
- SJU
1 stop9h 30m
Southwest
Thu 4/235:35 am
SJU
- ONT
1 stop12h 40m
Southwest
Deal found 3/2![Southwest logo]()
$432
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 4/196:05 am
ONT
- SJU
1 stop11h 33m
United Airlines
Thu 4/237:00 am
SJU
- ONT
2 stops18h 45m
United Airlines
Deal found 3/1![United Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” 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
- BQN
2 stops14h 04m
United Airlines
Fri 5/112:15 am
BQN
- ONT
3 stops20h 37m
United Airlines
Deal found 2/27![United Airlines logo]()
$495
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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
1 stop10h 34m
United Airlines
Wed 4/297:20 am
SJU
- ONT
2 stops16h 16m
United Airlines
Deal found 3/1![United Airlines logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” 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 4/258:00 am
ONT
- SJU
1 stop12h 10m
Multiple Airlines
Sat 5/23:21 am
SJU
- ONT
2 stops15h 56m
Multiple Airlines
Deal found 2/28![Multiple Airlines logo]()
$392
This Southwest deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” 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.
Sat 4/259:55 pm
ONT
- SJU
1 stop15h 35m
Southwest
Sun 5/35:00 am
SJU
- ONT
1 stop13h 10m
Southwest
Deal found 2/28![Southwest logo]()
$402
This United Airlines deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” 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 4/266:49 pm
ONT
- SJU
2 stops14h 45m
United Airlines
Wed 5/67:00 am
SJU
- ONT
2 stops13h 52m
United Airlines
Deal found 2/26![United Airlines logo]()
$318
This American Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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 4/296:00 am
ONT
- SJU
2 stops24h 13m
American Airlines
Wed 5/611:59 pm
SJU
- ONT
2 stops14h 35m
American Airlines
Deal found 3/1![American Airlines logo]()
$376
This Delta deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/307:05 am
ONT
- SJU
1 stop10h 19m
Delta
Fri 5/87:30 am
SJU
- ONT
1 stop14h 06m
Delta
Deal found 3/1![Delta logo]()
$438
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 3, 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 3, 2026.
This United Airlines deal was found by Cheapflights users on 3/1. Clicking the “Pick Dates” 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
2 stops13h 50m
United Airlines
Deal found 3/1![United Airlines logo]()
$147
This Trip.com deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” 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.
Wed 3/252:23 pm
ONT
- SJU
2 stops40h 16m
Frontier
Deal found 2/27![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 2/27. Clicking the “Pick Dates” 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 5/78:26 am
ONT
- SJU
2 stops35h 36m
Frontier
Deal found 2/27![Frontier logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” 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 5/88:26 am
ONT
- SJU
2 stops38h 35m
Frontier
Deal found 2/28![Frontier logo]()
$170
This Trip.com deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” 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 3/233:30 pm
ONT
- SJU
2 stops31h 33m
Frontier
Deal found 3/2![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1912:59 am
ONT
- SJU
2 stops29h 55m
Frontier
Deal found 3/2![Frontier logo]()
$175
This Super.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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.
Wed 5/274:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Deal found 3/3![Frontier logo]()
$176
This Expedia deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” 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.
Tue 6/24:15 pm
ONT
- SJU
1 stop10h 38m
Frontier
Deal found 2/28![Frontier logo]()
$178
This Kiwi.com deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1912:59 am
ONT
- SJU
3 stops20h 59m
Multiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” 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 4/235:33 pm
ONT
- SJU
3 stops52h 25m
Multiple Airlines
Deal found 3/3![Multiple Airlines logo]()
$186
This American Airlines deal was found by Cheapflights users on 2/26. Clicking the “Pick Dates” 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 3/239:53 am
ONT
- SJU
2 stops20h 07m
American Airlines
Deal found 2/26![American Airlines logo]()
$188
This United Airlines deal was found by Cheapflights users on 2/28. Clicking the “Pick Dates” 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 5/26:59 pm
ONT
- SJU
2 stops14h 35m
United Airlines
Deal found 2/28![United Airlines logo]()
$192
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 3, 2026.
Round-trip from | $276 (Frontier) |
|---|---|
One-way from | $147 (United Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $471 |
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 3, 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
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 5/19
7:00 am-8:34 pm
1 stop10h 34m
San Juan Luis Munoz Marin Intl
Sat 5/30
7:20 am-8:42 pm
2 stops16h 22m
$401
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 4/15
7:55 am-9:05 pm
2 stops10h 10m
San Juan Luis Munoz Marin Intl
Thu 4/23
5:05 am-3:15 pm
2 stops13h 10m
$457
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 4/9
9:20 am-11:55 pm
2 stops11h 35m
San Juan Luis Munoz Marin Intl
Tue 4/14
5:35 am-4:20 pm
2 stops13h 45m
$475
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 6/24
9:55 am-12:15 am
2 stops11h 20m
San Juan Luis Munoz Marin Intl
Mon 6/29
10:20 am-10:25 pm
1 stop15h 05m
$483
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 7/4
1:18 pm-5:29 am
2 stops13h 11m
San Juan Luis Munoz Marin Intl
Tue 7/14
2:55 pm-9:55 pm
1 stop10h 00m
$495
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Fri 4/24
6:05 am-11:09 pm
2 stops14h 04m
Aguadilla Borinquen
Fri 5/1
12:15 am-5:52 pm
3 stops20h 37m
$495
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 5/29
7:05 am-10:17 pm
1 stop12h 12m
San Juan Luis Munoz Marin Intl
Fri 6/5
2:48 pm-9:48 pm
1 stop10h 00m
$507
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 5/29
9:20 am-11:55 pm
2 stops11h 35m
San Juan Luis Munoz Marin Intl
Mon 6/1
5:05 am-3:15 pm
2 stops13h 10m
$536
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 7/11
10:30 am-12:45 am
2 stops11h 15m
San Juan Luis Munoz Marin Intl
Sat 7/18
5:00 am-7:15 pm
1 stop17h 15m
$540
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 7/28
5:45 am-8:38 pm
1 stop11h 53m
San Juan Luis Munoz Marin Intl
Mon 8/3
2:55 pm-9:55 pm
1 stop10h 00m
$560
Showing 1-10 of 31 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 $159). 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 3, 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.
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Comfort
8.0
Food
7.0
Entertainment
7.5
Overall
8.0
Crew
8.6
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
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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 3, 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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$73 | Average$509 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$574 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$321 | Average$550 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$365 | Average$615 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$445 | Average$570 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$467 | FlexibilityNo cancel fee | On-time62% |