$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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Jun 2 — Jun 91
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Puerto Rico with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Puerto Rico
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Cheapest flights from Ontario to Puerto RicoExplore the most affordable flight options available from Ontario to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 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 May 3, 2026.
This United Airlines deal was found by Cheapflights users on 4/30. 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 9/267:00 am
ONT
- SJU
2 stops13h 50m
United Airlines
Sat 10/32:00 pm
SJU
- ONT
1 stop9h 52m
United Airlines
Deal found 4/30![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 4/29. 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.
Fri 8/1410:59 pm
ONT
- SJU
1 stop9h 57m
Delta
Tue 8/252:40 pm
SJU
- ONT
1 stop10h 16m
Delta
Deal found 4/29![Delta logo]()
$398
This American Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 8/1011:59 pm
ONT
- SJU
2 stops13h 04m
American Airlines
Wed 8/193:44 pm
SJU
- ONT
1 stop10h 14m
American Airlines
Deal found 4/30![American Airlines logo]()
$414
This Priceline deal was found by Cheapflights users on 5/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:50 pm
ONT
- SJU
1 stop11h 08m
Multiple Airlines
Sat 8/296:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$418
This Delta deal was found by Cheapflights users on 4/29. 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.
Sun 8/1610:59 pm
ONT
- SJU
1 stop9h 57m
Delta
Wed 8/261:06 pm
SJU
- ONT
1 stop11h 50m
Delta
Deal found 4/29![Delta logo]()
$422
This Priceline deal was found by Cheapflights users on 5/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 pm
ONT
- SJU
1 stop11h 08m
Multiple Airlines
Sat 8/296:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$423
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Fri 7/315:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Tue 8/41:40 pm
SJU
- ONT
1 stop10h 02m
United Airlines
Deal found 4/28![United Airlines logo]()
$427
This Delta deal was found by Cheapflights users on 5/1. 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 7/305:10 pm
ONT
- SJU
2 stops17h 01m
Delta
Wed 8/52:05 pm
SJU
- ONT
2 stops12h 39m
Delta
Deal found 5/1![Delta logo]()
$430
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/3110:00 pm
ONT
- SJU
1 stop10h 46m
Delta
Tue 8/42:05 pm
SJU
- ONT
2 stops12h 39m
Delta
Deal found 4/28![Delta logo]()
$432
This Southwest deal was found by Cheapflights users on 5/1. 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.
Thu 9/1711:00 am
ONT
- SJU
2 stops9h 50m
Southwest
Sun 9/205:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 5/1![Southwest logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 8/1110:49 am
ONT
- SJU
2 stops27h 47m
Frontier
Wed 8/196:25 am
SJU
- ONT
1 stop13h 23m
Frontier
Deal found 4/30![Frontier logo]()
$444
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Sat 8/227:00 am
ONT
- BQN
2 stops13h 09m
United Airlines
Mon 8/2412:15 am
BQN
- ONT
2 stops15h 23m
United Airlines
Deal found 4/29![United Airlines logo]()
$585
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 May 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 May 3, 2026.
This Delta deal was found by Cheapflights users on 4/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/315:10 pm
ONT
- SJU
2 stops17h 01m
Delta
Tue 8/42:05 pm
SJU
- ONT
2 stops12h 39m
Delta
Deal found 4/28![Delta logo]()
$432
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Thu 9/246:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Tue 10/67:00 am
SJU
- ONT
2 stops16h 16m
United Airlines
Deal found 5/2![United Airlines logo]()
$464
This Southwest deal was found by Cheapflights users on 5/1. 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.
Sun 6/218:40 pm
ONT
- SJU
2 stops11h 05m
Southwest
Sat 6/276:00 am
SJU
- ONT
2 stops13h 20m
Southwest
Deal found 5/1![Southwest logo]()
$600
This JetBlue deal was found by Cheapflights users on 4/30. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2011:50 pm
ONT
- SJU
1 stop13h 08m
JetBlue
Fri 7/241:30 pm
SJU
- ONT
1 stop12h 05m
JetBlue
Deal found 4/30![JetBlue logo]()
$705
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Thu 8/137:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Tue 8/187:00 am
SJU
- ONT
2 stops16h 04m
United Airlines
Deal found 5/1![United Airlines logo]()
$494
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Tue 8/45:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Tue 8/187:00 am
SJU
- ONT
2 stops14h 11m
United Airlines
Deal found 5/2![United Airlines logo]()
$534
This Southwest deal was found by Cheapflights users on 4/28. 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.
Thu 7/169:40 am
ONT
- SJU
1 stop11h 45m
Southwest
Tue 7/215:00 am
SJU
- ONT
1 stop10h 05m
Southwest
Deal found 4/28![Southwest logo]()
$656
This United Airlines deal was found by Cheapflights users on 4/28. 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 9/125:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Sat 9/262:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 4/28![United Airlines logo]()
$564
This United Airlines deal was found by Cheapflights users on 5/2. 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 8/227:00 am
ONT
- BQN
2 stops13h 09m
United Airlines
Mon 8/2412:15 am
BQN
- ONT
2 stops14h 57m
United Airlines
Deal found 5/2![United Airlines logo]()
$585
This Southwest deal was found by Cheapflights users on 4/28. 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.
Thu 6/185:15 am
ONT
- SJU
2 stops11h 10m
Southwest
Fri 6/269:50 am
SJU
- ONT
2 stops12h 05m
Southwest
Deal found 4/28![Southwest logo]()
$716
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 8/75:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 8/142:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 4/29![United Airlines logo]()
$605
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Sun 9/275:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Wed 9/307:00 am
SJU
- ONT
2 stops13h 51m
United Airlines
Deal found 5/2![United Airlines logo]()
$605
This United Airlines deal was found by Cheapflights users on 4/28. 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 8/227:00 am
ONT
- BQN
2 stops13h 09m
United Airlines
Tue 8/2512:15 am
BQN
- ONT
2 stops15h 23m
United Airlines
Deal found 4/28![United Airlines logo]()
$662
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/305:45 am
ONT
- BQN
2 stops38h 24m
United Airlines
Fri 6/512:15 am
BQN
- ONT
2 stops25h 31m
United Airlines
Deal found 4/30![United Airlines logo]()
$812
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Mon 6/16:30 pm
ONT
- BQN
2 stops25h 39m
United Airlines
Sun 6/712:15 am
BQN
- ONT
2 stops23h 31m
United Airlines
Deal found 5/2![United Airlines logo]()
$1,128
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated May 3, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated May 3, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/1. 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.
Mon 5/46:00 am
ONT
- SJU
1 stop19h 32m
American Airlines
Mon 6/112:44 am
SJU
- ONT
1 stop11h 47m
American Airlines
Deal found 5/1![American Airlines logo]()
$587
This American Airlines deal was found by Cheapflights users on 4/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/87:35 pm
ONT
- SJU
2 stops12h 13m
American Airlines
Mon 5/1111:59 pm
SJU
- ONT
2 stops14h 35m
American Airlines
Deal found 4/28![American Airlines logo]()
$550
This United Airlines deal was found by Cheapflights users on 5/1. 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 5/85:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Wed 5/132:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 5/1![United Airlines logo]()
$570
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Sat 5/1610:26 pm
ONT
- SJU
1 stop19h 25m
American Airlines
Sat 6/137:00 am
SJU
- ONT
1 stop18h 36m
American Airlines
Deal found 5/2![American Airlines logo]()
$547
This Southwest deal was found by Cheapflights users on 5/2. 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.
Sun 5/173:50 pm
ONT
- SJU
2 stops14h 20m
Southwest
Thu 5/215:05 am
SJU
- ONT
2 stops12h 20m
Southwest
Deal found 5/2![Southwest logo]()
$490
This American Airlines deal was found by Cheapflights users on 5/2. 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 5/177:35 pm
ONT
- SJU
2 stops10h 38m
American Airlines
Thu 5/217:00 am
SJU
- ONT
1 stop18h 36m
American Airlines
Deal found 5/2![American Airlines logo]()
$552
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Mon 5/1811:29 pm
ONT
- SJU
1 stop9h 34m
American Airlines
Fri 5/2212:44 am
SJU
- ONT
2 stops14h 21m
American Airlines
Deal found 5/2![American Airlines logo]()
$592
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/194:52 pm
ONT
- SJU
2 stops13h 21m
American Airlines
Thu 5/2812:44 am
SJU
- ONT
2 stops14h 21m
American Airlines
Deal found 4/29![American Airlines logo]()
$432
This Delta deal was found by Cheapflights users on 5/2. 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.
Thu 5/287:05 am
ONT
- SJU
1 stop12h 12m
Delta
Fri 6/52:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 5/2![Delta logo]()
$580
This Delta deal was found by Cheapflights users on 5/2. 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 5/2910:00 pm
ONT
- SJU
1 stop11h 01m
Delta
Fri 6/52:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 5/2![Delta logo]()
$472
This Priceline deal was found by Cheapflights users on 4/29. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:41 pm
ONT
- BQN
1 stop25h 16m
JetBlue
Fri 6/56:30 am
BQN
- ONT
1 stop17h 17m
JetBlue
Deal found 4/29![JetBlue logo]()
$636
This JetBlue deal was found by Cheapflights users on 5/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/3010:41 pm
ONT
- SJU
1 stop11h 35m
JetBlue
Fri 6/59:52 am
SJU
- ONT
1 stop13h 55m
JetBlue
Deal found 5/2![JetBlue logo]()
$574
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 May 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 May 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Fri 5/228:06 pm
ONT
- SJU
2 stops28h 55m
Frontier
Deal found 5/1![Frontier logo]()
$147
This Trip.com deal was found by Cheapflights users on 5/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
ONT
- SJU
2 stops39h 37m
Frontier
Deal found 5/1![Frontier logo]()
$173
This Delta deal was found by Cheapflights users on 4/30. 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.
Sun 7/1210:00 pm
ONT
- SJU
1 stop10h 46m
Delta
Deal found 4/30![Delta logo]()
$187
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Mon 6/297:13 pm
ONT
- SJU
2 stops12h 49m
American Airlines
Deal found 5/2![American Airlines logo]()
$212
This United Airlines deal was found by Cheapflights users on 4/28. 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 8/81:18 pm
ONT
- SJU
2 stops13h 11m
United Airlines
Deal found 4/28![United Airlines logo]()
$232
This Delta deal was found by Cheapflights users on 4/29. 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.
Fri 5/1510:00 pm
ONT
- SJU
1 stop11h 01m
Delta
Deal found 4/29![Delta logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 4/29. 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.
Sat 6/206:47 pm
ONT
- SJU
2 stops18h 56m
Multiple Airlines
Deal found 4/29![Multiple Airlines logo]()
$260
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Thu 7/305:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 4/30![United Airlines logo]()
$262
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/28:06 pm
ONT
- SJU
2 stops24h 53m
Frontier
Deal found 5/3![Frontier logo]()
$266
This United Airlines deal was found by Cheapflights users on 5/3. 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 5/105:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Deal found 5/3![United Airlines logo]()
$285
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Wed 5/65:00 am
ONT
- BQN
2 stops15h 09m
United Airlines
Deal found 5/3![United Airlines logo]()
$320
This Priceline deal was found by Cheapflights users on 5/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/510:41 pm
ONT
- BQN
1 stop25h 16m
JetBlue
Deal found 5/2![JetBlue logo]()
$343
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 May 3, 2026.
Round-trip from | $374 (United Airlines) |
|---|---|
One-way from | $147 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $452 |
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 May 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
Fri 7/31
5:10 pm-1:11 pm
2 stops17h 01m
San Juan Luis Munoz Marin Intl
Tue 8/4
2:05 pm-11:44 pm
2 stops12h 39m
$432
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 9/24
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Tue 10/6
7:00 am-8:16 pm
2 stops16h 16m
$464
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 8/13
7:13 pm-3:42 pm
2 stops17h 29m
San Juan Luis Munoz Marin Intl
Tue 8/18
7:00 am-8:04 pm
2 stops16h 04m
$494
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 8/4
5:45 am-8:38 pm
1 stop11h 53m
San Juan Luis Munoz Marin Intl
Tue 8/18
7:00 am-6:11 pm
2 stops14h 11m
$534
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 9/12
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Sat 9/26
2:55 pm-9:58 pm
1 stop10h 03m
$564
OntarioAguadilla
ONT - BQN
ONTBQN
Ontario
Sat 8/22
7:00 am-11:09 pm
2 stops13h 09m
Aguadilla Borinquen
Mon 8/24
12:15 am-12:12 pm
2 stops14h 57m
$585
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 6/21
8:40 pm-10:45 am
2 stops11h 05m
San Juan Luis Munoz Marin Intl
Sat 6/27
6:00 am-4:20 pm
2 stops13h 20m
$600
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 8/7
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Fri 8/14
2:20 pm-9:59 pm
1 stop10h 39m
$605
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 9/27
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Wed 9/30
7:00 am-5:51 pm
2 stops13h 51m
$605
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 7/16
9:40 am-12:25 am
1 stop11h 45m
San Juan Luis Munoz Marin Intl
Tue 7/21
5:00 am-12:05 pm
1 stop10h 05m
$656
Showing 1-10 of 36 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
How far ahead should I book a flight from Ontario to Puerto Rico?
The price you pay for your flight from Ontario to Puerto Rico may vary depending on when you book. For the best chance of a lower fare, look to book 14 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Ontario to Puerto Rico?
Currently, November is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $120). Flying from Ontario to Puerto Rico in July is currently the most expensive (average of $427). 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 May 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.
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Comfort
8.0
Crew
8.6
Overall
8.0
Food
7.0
Boarding
8.1
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.
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Alternative routes for Ontario to Puerto Rico
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Complete your trip
Complete your trip to Puerto Rico by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Puerto Rico by cabin class
Find flights from Ontario to Puerto Rico, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Puerto Rico flights
Browse other Ontario and Puerto Rico flight options. Last updated on May 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 May 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$509 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$552 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$321 | Average$553 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$360 | Average$577 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$419 | Average$555 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$561 | FlexibilityNo cancel fee | On-time62% |