$151+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
May 3 — May 101
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 April 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 April 3, 2026.
This Delta deal was found by Cheapflights users on 4/3. 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.
Wed 8/1910:59 pm
ONT
- SJU
1 stop9h 57m
Delta
Thu 9/31:06 pm
SJU
- ONT
1 stop11h 50m
Delta
Deal found 4/3![Delta logo]()
$353
This American Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 9/1811:59 pm
ONT
- SJU
1 stop12h 03m
American Airlines
Mon 9/217:05 pm
SJU
- ONT
2 stops19h 43m
American Airlines
Deal found 3/31![American Airlines logo]()
$354
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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
Sat 4/181:59 am
SJU
- ONT
2 stops32h 32m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:15 am
ONT
- SJU
1 stop11h 55m
Multiple Airlines
Mon 4/2711:30 am
SJU
- ONT
2 stops39h 25m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$359
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/27:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Mon 5/111:00 am
SJU
- ONT
2 stops14h 38m
United Airlines
Deal found 3/30![United Airlines logo]()
$376
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Sat 4/258:00 am
ONT
- SJU
1 stop12h 10m
Multiple Airlines
Sun 5/33:31 pm
SJU
- ONT
2 stops45h 34m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$378
This Delta deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 8/17:05 am
ONT
- SJU
1 stop12h 24m
Delta
Thu 8/271:06 pm
SJU
- ONT
1 stop11h 50m
Delta
Deal found 3/29![Delta logo]()
$394
This Trip.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:44 pm
ONT
- BQN
2 stops26h 59m
Frontier
Tue 4/282:38 am
BQN
- ONT
2 stops24h 17m
Frontier
Deal found 3/30![Frontier logo]()
$395
This CheapOair deal was found by Cheapflights users on 4/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:41 pm
ONT
- SJU
1 stop21h 12m
Multiple Airlines
Sat 5/306:25 am
SJU
- ONT
1 stop13h 39m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/146:15 am
ONT
- SJU
2 stops13h 47m
American Airlines
Tue 4/215:45 am
SJU
- ONT
2 stops15h 39m
American Airlines
Deal found 3/30![American Airlines logo]()
$412
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/288:15 am
ONT
- SJU
1 stop11h 55m
Multiple Airlines
Sun 5/35:45 am
SJU
- ONT
1 stop12h 49m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$419
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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
- BQN
2 stops14h 59m
United Airlines
Fri 4/1712:15 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 3/30![United Airlines logo]()
$470
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 April 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 April 3, 2026.
This Delta deal was found by Cheapflights users on 4/3. 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.
Wed 8/1910:59 pm
ONT
- SJU
1 stop9h 57m
Delta
Thu 9/31:06 pm
SJU
- ONT
1 stop11h 50m
Delta
Deal found 4/3![Delta logo]()
$353
This United Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Tue 5/51:00 am
SJU
- ONT
2 stops14h 38m
United Airlines
Deal found 3/29![United Airlines logo]()
$444
This Southwest deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 8/216:20 am
ONT
- SJU
2 stops10h 45m
Southwest
Mon 8/245:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 3/29![Southwest logo]()
$452
This Trip.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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.
Thu 4/235:33 pm
ONT
- BQN
2 stops29h 10m
Frontier
Sat 4/252:48 am
BQN
- ONT
2 stops32h 36m
Frontier
Deal found 3/31![Frontier logo]()
$516
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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
- BQN
2 stops14h 59m
United Airlines
Fri 4/1712:15 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 3/30![United Airlines logo]()
$470
This Southwest deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 7/1810:30 am
ONT
- SJU
2 stops11h 15m
Southwest
Wed 7/225:00 am
SJU
- ONT
1 stop10h 05m
Southwest
Deal found 3/30![Southwest logo]()
$545
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/296:05 am
ONT
- BQN
2 stops14h 04m
United Airlines
Tue 5/512:15 am
BQN
- ONT
2 stops15h 23m
United Airlines
Deal found 3/30![United Airlines logo]()
$504
This Southwest deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” 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 4/286:55 am
ONT
- SJU
2 stops11h 10m
Southwest
Sun 5/39:55 am
SJU
- ONT
2 stops13h 45m
Southwest
Deal found 3/29![Southwest logo]()
$566
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/155:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Sat 4/181:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 3/30![United Airlines logo]()
$560
This United Airlines deal was found by Cheapflights users on 4/1. 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.
Fri 4/175:10 am
ONT
- SJU
1 stop9h 28m
United Airlines
Tue 4/212:55 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 4/1![United Airlines logo]()
$560
This United Airlines deal was found by Cheapflights users on 4/3. 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 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 4/3![United Airlines logo]()
$560
This United Airlines deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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
- BQN
2 stops13h 09m
United Airlines
Mon 4/2712:15 am
BQN
- ONT
2 stops15h 05m
United Airlines
Deal found 3/31![United Airlines logo]()
$565
This United Airlines deal was found by Cheapflights users on 4/2. 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.
Fri 5/295:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Fri 6/512:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 4/2![United Airlines logo]()
$692
This United Airlines deal was found by Cheapflights users on 4/3. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/85:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Sun 6/1412:15 am
BQN
- ONT
2 stops15h 32m
United Airlines
Deal found 4/3![United Airlines logo]()
$791
This United Airlines deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/116:59 pm
ONT
- BQN
2 stops25h 10m
United Airlines
Thu 5/1412:15 am
BQN
- ONT
2 stops24h 43m
United Airlines
Deal found 3/29![United Airlines logo]()
$907
This United Airlines deal was found by Cheapflights users on 4/1. 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 4/136:00 am
ONT
- BQN
2 stops38h 09m
United Airlines
Wed 4/1512:15 am
BQN
- ONT
2 stops15h 05m
United Airlines
Deal found 4/1![United Airlines logo]()
$912
This United Airlines deal was found by Cheapflights users on 4/1. 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 4/216:05 am
ONT
- BQN
2 stops14h 04m
United Airlines
Mon 5/1812:15 am
BQN
- ONT
2 stops15h 23m
United Airlines
Deal found 4/1![United Airlines logo]()
$924
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated April 3, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/146:15 am
ONT
- SJU
2 stops13h 47m
American Airlines
Tue 4/215:45 am
SJU
- ONT
2 stops15h 39m
American Airlines
Deal found 3/30![American Airlines logo]()
$412
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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
- BQN
2 stops14h 59m
United Airlines
Fri 4/1712:15 am
BQN
- ONT
3 stops20h 32m
United Airlines
Deal found 3/30![United Airlines logo]()
$470
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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
Sat 4/181:59 am
SJU
- ONT
2 stops32h 32m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/218:15 am
ONT
- SJU
1 stop11h 55m
Multiple Airlines
Mon 4/2711:30 am
SJU
- ONT
2 stops39h 25m
Multiple Airlines
Deal found 3/30![Multiple Airlines logo]()
$359
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:26 pm
ONT
- SJU
1 stop9h 22m
American Airlines
Tue 4/285:45 am
SJU
- ONT
2 stops15h 39m
American Airlines
Deal found 4/2![American Airlines logo]()
$354
This Delta deal was found by Cheapflights users on 4/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/2410:15 pm
ONT
- SJU
1 stop10h 30m
Delta
Tue 4/287:30 am
SJU
- ONT
1 stop14h 03m
Delta
Deal found 4/2![Delta logo]()
$425
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Sat 4/258:00 am
ONT
- SJU
1 stop12h 10m
Multiple Airlines
Sun 5/33:31 pm
SJU
- ONT
2 stops45h 34m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$378
This Trip.com deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:44 pm
ONT
- BQN
2 stops26h 59m
Frontier
Tue 4/282:38 am
BQN
- ONT
2 stops24h 17m
Frontier
Deal found 3/30![Frontier logo]()
$395
This Kiwi.com deal was found by Cheapflights users on 3/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/288:15 am
ONT
- SJU
1 stop11h 55m
Multiple Airlines
Sun 5/33:31 pm
SJU
- ONT
2 stops45h 34m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$353
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 5/27:00 am
ONT
- SJU
1 stop10h 34m
United Airlines
Mon 5/111:00 am
SJU
- ONT
2 stops14h 38m
United Airlines
Deal found 3/30![United Airlines logo]()
$376
This American Airlines deal was found by Cheapflights users on 4/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/245:44 am
ONT
- SJU
1 stop14h 55m
American Airlines
Thu 5/2812:44 am
SJU
- ONT
2 stops14h 21m
American Airlines
Deal found 4/2![American Airlines logo]()
$402
This CheapOair deal was found by Cheapflights users on 4/2. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2810:41 pm
ONT
- SJU
1 stop21h 12m
Multiple Airlines
Sat 5/306:25 am
SJU
- ONT
1 stop13h 39m
Multiple Airlines
Deal found 4/2![Multiple Airlines logo]()
$399
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 April 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 April 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/3. 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.
Tue 4/2112:59 am
ONT
- SJU
2 stops44h 55m
Multiple Airlines
Deal found 4/3![Multiple Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/305:43 pm
ONT
- SJU
2 stops26h 46m
Frontier
Deal found 4/1![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/38:21 am
ONT
- SJU
2 stops14h 40m
Frontier
Deal found 3/31![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/710:50 am
ONT
- SJU
2 stops34h 07m
Frontier
Deal found 4/1![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/208:26 am
ONT
- SJU
2 stops30h 33m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$176
This Delta deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/210:15 pm
ONT
- SJU
1 stop10h 30m
Delta
Deal found 3/30![Delta logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/96:00 am
ONT
- SJU
2 stops32h 36m
Frontier
Deal found 4/1![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:00 am
ONT
- SJU
2 stops43h 01m
Frontier
Deal found 4/1![Frontier logo]()
$187
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2912:59 am
ONT
- SJU
3 stops22h 07m
Multiple Airlines
Deal found 4/1![Multiple Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/218:06 pm
ONT
- SJU
2 stops45h 34m
Frontier
Deal found 4/1![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 3/31. Clicking the “Pick Dates” 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 5/39:19 am
ONT
- SJU
3 stops30h 40m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$207
This United Airlines deal was found by Cheapflights users on 3/30. Clicking the “Pick Dates” 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 4/216:05 am
ONT
- BQN
2 stops14h 04m
United Airlines
Deal found 3/30![United Airlines logo]()
$227
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 April 3, 2026.
Round-trip from | $353 (Delta) |
|---|---|
One-way from | $151 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $412 |
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 April 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
Cheapest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 8/19
10:59 pm-11:56 am
1 stop9h 57m
San Juan Luis Munoz Marin Intl
Thu 9/3
1:06 pm-9:56 pm
1 stop11h 50m
$353
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 5/4
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Tue 5/5
1:00 am-12:38 pm
2 stops14h 38m
$444
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 8/21
6:20 am-8:05 pm
2 stops10h 45m
San Juan Luis Munoz Marin Intl
Mon 8/24
5:00 am-2:00 pm
2 stops12h 00m
$452
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Tue 4/14
5:10 am-11:09 pm
2 stops14h 59m
Aguadilla Borinquen
Fri 4/17
12:15 am-5:47 pm
3 stops20h 32m
$470
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Wed 4/29
6:05 am-11:09 pm
2 stops14h 04m
Aguadilla Borinquen
Tue 5/5
12:15 am-12:38 pm
2 stops15h 23m
$504
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Thu 4/23
5:33 pm-1:43 am
2 stops29h 10m
Aguadilla Borinquen
Sat 4/25
2:48 am-8:24 am
2 stops32h 36m
$516
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 7/18
10:30 am-12:45 am
2 stops11h 15m
San Juan Luis Munoz Marin Intl
Wed 7/22
5:00 am-12:05 pm
1 stop10h 05m
$545
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 4/15
5:10 am-5:38 pm
1 stop9h 28m
San Juan Luis Munoz Marin Intl
Sat 4/18
1:40 pm-8:36 pm
1 stop9h 56m
$560
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 4/17
5:10 am-5:38 pm
1 stop9h 28m
San Juan Luis Munoz Marin Intl
Tue 4/21
2:55 pm-9:50 pm
1 stop9h 55m
$560
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 4/19
6:05 am-8:38 pm
1 stop11h 33m
San Juan Luis Munoz Marin Intl
Thu 4/23
7:00 am-10:45 pm
2 stops18h 45m
$560
Showing 1-10 of 35 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 $158). 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 April 3, 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.
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Entertainment
7.5
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
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 April 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 April 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$509 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$597 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$321 | Average$543 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$360 | Average$578 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$445 | Average$560 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$492 | FlexibilityNo cancel fee | On-time62% |