$262+ 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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Oct 2 — Oct 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 September 2, 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 September 2, 2026.
This American Airlines deal was found by Cheapflights users on 9/1. 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 10/2410:10 pm -
1 stop13h 51m
Wed 10/283:51 pm -
1 stop10h 08m
Deal found 9/1![American Airlines logo]()
$342
This American Airlines deal was found by Cheapflights users on 8/28. 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 9/182:22 pm -
2 stops20h 35m
Mon 9/216:00 am -
2 stops19h 37m
Deal found 8/28![American Airlines logo]()
$425
This American Airlines deal was found by Cheapflights users on 8/31. 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.
Thu 10/226:00 am -
1 stop14h 20m
Sat 10/316:30 am -
2 stops17h 41m
Deal found 8/31![American Airlines logo]()
$428
This United Airlines deal was found by Cheapflights users on 8/27. 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.
Wed 12/95:00 am -
1 stop9h 25m
Wed 12/162:21 pm -
1 stop9h 59m
Deal found 8/27![United Airlines logo]()
$432
This American Airlines deal was found by Cheapflights users on 8/31. 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.
Mon 10/1911:59 pm -
2 stops12h 39m
Sat 10/246:00 am -
1 stop15h 44m
Deal found 8/31![American Airlines logo]()
$434
This American Airlines deal was found by Cheapflights users on 8/28. 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.
Wed 10/284:29 pm -
2 stops15h 51m
Mon 11/24:59 pm -
1 stop20h 41m
Deal found 8/28![American Airlines logo]()
$448
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Thu 10/15:00 am -
1 stop9h 38m
Sun 10/41:00 am -
2 stops14h 46m
Deal found 8/31![United Airlines logo]()
$452
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/256:32 pm -
2 stops15h 02m
Wed 9/302:00 pm -
1 stop9h 58m
Deal found 8/27![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 8/27. 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.
Tue 12/85:00 am -
1 stop9h 25m
Wed 12/162:21 pm -
1 stop9h 59m
Deal found 8/27![United Airlines logo]()
$472
This United Airlines deal was found by Cheapflights users on 8/29. 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.
Wed 11/185:00 am -
2 stops14h 57m
Tue 11/241:09 am -
2 stops21h 38m
Deal found 8/29![United Airlines logo]()
$674
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/286:00 am -
2 stops13h 57m
Sat 10/311:09 am -
2 stops15h 24m
Deal found 9/1![United Airlines logo]()
$703
This United Airlines deal was found by Cheapflights users on 8/30. 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.
Mon 10/195:00 am -
2 stops15h 09m
Wed 10/2112:15 am -
2 stops15h 31m
Deal found 8/30![United Airlines logo]()
$743
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 September 2, 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 September 2, 2026.
This Southwest deal was found by Cheapflights users on 8/30. 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.
Thu 10/112:05 pm -
2 stops10h 15m
Mon 10/55:00 am -
2 stops12h 25m
Deal found 8/30![Southwest logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/30. 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 10/15:00 am -
1 stop9h 38m
Mon 10/52:00 pm -
1 stop9h 58m
Deal found 8/30![United Airlines logo]()
$467
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/256:32 pm -
2 stops15h 02m
Wed 9/302:00 pm -
1 stop9h 58m
Deal found 8/27![United Airlines logo]()
$470
This Southwest deal was found by Cheapflights users on 8/28. 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.
Wed 9/237:00 am -
2 stops12h 05m
Sun 9/276:35 am -
2 stops10h 25m
Deal found 8/28![Southwest logo]()
$481
This Southwest deal was found by Cheapflights users on 8/30. 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.
Fri 11/2711:55 pm -
1 stop11h 40m
Sun 12/65:35 am -
2 stops12h 30m
Deal found 8/30![Southwest logo]()
$520
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Fri 10/305:00 am -
1 stop9h 25m
Sun 11/12:21 pm -
1 stop10h 30m
Deal found 8/31![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 8/28. 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 9/296:00 am -
1 stop11h 38m
Sat 10/32:00 pm -
1 stop9h 58m
Deal found 8/28![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 9/1. 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 11/77:00 am -
1 stop10h 00m
Wed 11/117:40 am -
2 stops14h 21m
Deal found 9/1![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Mon 10/195:00 am -
1 stop9h 38m
Wed 10/212:00 pm -
1 stop9h 58m
Deal found 8/28![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/15:00 am -
1 stop9h 38m
Wed 10/72:55 pm -
1 stop10h 04m
Deal found 9/1![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 8/29. 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.
Thu 10/296:00 am -
1 stop11h 24m
Mon 11/22:21 pm -
1 stop10h 30m
Deal found 8/29![United Airlines logo]()
$524
This United Airlines deal was found by Cheapflights users on 8/29. 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.
Wed 11/185:00 am -
2 stops14h 57m
Tue 11/241:09 am -
2 stops21h 38m
Deal found 8/29![United Airlines logo]()
$674
This United Airlines deal was found by Cheapflights users on 8/30. 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.
Mon 10/195:00 am -
2 stops15h 09m
Wed 10/2112:15 am -
2 stops15h 31m
Deal found 8/30![United Airlines logo]()
$743
This United Airlines deal was found by Cheapflights users on 8/30. 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.
Fri 11/65:00 am -
2 stops14h 57m
Sat 11/141:09 am -
2 stops15h 24m
Deal found 8/30![United Airlines logo]()
$744
This United Airlines deal was found by Cheapflights users on 8/30. 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 10/75:00 am -
2 stops15h 09m
Wed 10/1412:15 am -
2 stops15h 31m
Deal found 8/30![United Airlines logo]()
$744
This United Airlines deal was found by Cheapflights users on 8/30. 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 11/247:00 am -
2 stops12h 57m
Sat 11/281:09 am -
3 stops15h 24m
Deal found 8/30![United Airlines logo]()
$1,431
Last-minute flights from Ontario to Puerto RicoDiscover last-minute flight deals from Ontario to Puerto Rico. Data last updated September 2, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Puerto Rico. Data last updated September 2, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/28. 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 9/182:22 pm -
2 stops20h 35m
Mon 9/216:00 am -
2 stops19h 37m
Deal found 8/28![American Airlines logo]()
$425
This United Airlines deal was found by Cheapflights users on 8/27. 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.
Mon 9/216:00 am -
1 stop11h 38m
Tue 9/221:00 am -
2 stops14h 12m
Deal found 8/27![United Airlines logo]()
$472
This United Airlines deal was found by Cheapflights users on 8/27. 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 9/256:32 pm -
2 stops15h 02m
Wed 9/302:00 pm -
1 stop9h 58m
Deal found 8/27![United Airlines logo]()
$470
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Thu 10/15:00 am -
1 stop9h 38m
Sun 10/41:00 am -
2 stops14h 46m
Deal found 8/31![United Airlines logo]()
$452
This United Airlines deal was found by Cheapflights users on 8/27. 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.
Mon 10/195:00 am -
1 stop9h 38m
Fri 10/301:21 pm -
1 stop10h 30m
Deal found 8/27![United Airlines logo]()
$432
This American Airlines deal was found by Cheapflights users on 8/31. 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.
Mon 10/1911:59 pm -
2 stops12h 39m
Sat 10/246:00 am -
1 stop15h 44m
Deal found 8/31![American Airlines logo]()
$434
This United Airlines deal was found by Cheapflights users on 8/30. 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.
Mon 10/195:00 am -
2 stops15h 09m
Wed 10/2112:15 am -
2 stops15h 31m
Deal found 8/30![United Airlines logo]()
$743
This American Airlines deal was found by Cheapflights users on 8/31. 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.
Thu 10/226:00 am -
1 stop14h 20m
Sat 10/316:30 am -
2 stops17h 41m
Deal found 8/31![American Airlines logo]()
$428
This American Airlines deal was found by Cheapflights users on 9/1. 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.
Thu 10/226:00 am -
1 stop14h 20m
Tue 11/31:53 pm -
1 stop12h 19m
Deal found 9/1![American Airlines logo]()
$474
This American Airlines deal was found by Cheapflights users on 9/1. 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 10/2410:10 pm -
1 stop13h 51m
Wed 10/283:51 pm -
1 stop10h 08m
Deal found 9/1![American Airlines logo]()
$342
This American Airlines deal was found by Cheapflights users on 8/28. 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.
Wed 10/284:29 pm -
2 stops15h 51m
Mon 11/24:59 pm -
1 stop20h 41m
Deal found 8/28![American Airlines logo]()
$448
This United Airlines deal was found by Cheapflights users on 9/1. 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 10/286:00 am -
2 stops13h 57m
Sat 10/311:09 am -
2 stops15h 24m
Deal found 9/1![United Airlines logo]()
$703
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 September 2, 2026.
Search for one-way flight options from Ontario to Puerto Rico. Find affordable one-way fares based on user searches. Data last updated September 2, 2026.
This United Airlines deal was found by Cheapflights users on 8/31. 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 11/144:17 pm -
2 stops18h 23m
Deal found 8/31![United Airlines logo]()
$262
This United Airlines deal was found by Cheapflights users on 8/28. 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.
Wed 12/95:00 am -
2 stops14h 57m
Deal found 8/28![United Airlines logo]()
$262
This United Airlines deal was found by Cheapflights users on 9/1. 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 9/156:00 am -
1 stop11h 38m
Deal found 9/1![United Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 8/31. 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.
Sat 9/57:56 pm -
2 stops31h 48m
Deal found 8/31![Frontier logo]()
$295
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Wed 11/185:00 am -
1 stop9h 25m
Deal found 8/31![United Airlines logo]()
$302
This United Airlines deal was found by Cheapflights users on 8/31. 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 9/55:00 am -
1 stop9h 38m
Deal found 8/31![United Airlines logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 8/31. 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.
Thu 9/179:36 pm -
3 stops22h 37m
Deal found 8/31![Multiple Airlines logo]()
$351
This United Airlines deal was found by Cheapflights users on 8/31. 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 10/106:00 am -
1 stop11h 38m
Deal found 8/31![United Airlines logo]()
$372
This United Airlines deal was found by Cheapflights users on 8/30. 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.
Mon 10/55:00 am -
2 stops15h 09m
Deal found 8/30![United Airlines logo]()
$372
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Mon 9/76:00 am -
1 stop11h 38m
Deal found 8/31![United Airlines logo]()
$441
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Tue 9/86:00 am -
2 stops14h 09m
Deal found 8/31![United Airlines logo]()
$441
This United Airlines deal was found by Cheapflights users on 8/31. 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.
Mon 9/216:00 am -
2 stops38h 09m
Deal found 8/31![United Airlines logo]()
$446
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 September 2, 2026.
Round-trip from | $342 (American Airlines) |
|---|---|
One-way from | $262 (United Airlines) |
Popular in | June |
Cheapest in | October |
Average price | $420 |
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 7,457,451 searches. Data last updated September 2, 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 Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Thu 10/1
12:05 pm-1:20 am
2 stops10h 15m
San Juan Luis Munoz Marin Intl
Mon 10/5
5:00 am-2:25 pm
2 stops12h 25m
$434
Quickest round-trip
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Thu 10/1
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Mon 10/5
2:00 pm-8:58 pm
1 stop9h 58m
$467
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Fri 9/25
6:32 pm-12:34 pm
2 stops15h 02m
San Juan Luis Munoz Marin Intl
Wed 9/30
2:00 pm-8:58 pm
1 stop9h 58m
$470
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Wed 9/23
7:00 am-10:05 pm
2 stops12h 05m
San Juan Luis Munoz Marin Intl
Sun 9/27
6:35 am-2:00 pm
2 stops10h 25m
$481
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Fri 11/27
11:55 pm-3:35 pm
1 stop11h 40m
San Juan Luis Munoz Marin Intl
Sun 12/6
5:35 am-2:05 pm
2 stops12h 30m
$520
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Fri 10/30
5:00 am-5:25 pm
1 stop9h 25m
San Juan Luis Munoz Marin Intl
Sun 11/1
2:21 pm-8:51 pm
1 stop10h 30m
$524
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Tue 9/29
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Sat 10/3
2:00 pm-8:58 pm
1 stop9h 58m
$524
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Sat 11/7
7:00 am-9:00 pm
1 stop10h 00m
San Juan Luis Munoz Marin Intl
Wed 11/11
7:40 am-6:01 pm
2 stops14h 21m
$524
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Mon 10/19
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Wed 10/21
2:00 pm-8:58 pm
1 stop9h 58m
$524
OntarioSan Juan
ONT Ontario - SJU San Juan Luis Munoz Marin Intl
ONTSJU
Ontario
Thu 10/1
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Wed 10/7
2:55 pm-9:59 pm
1 stop10h 04m
$524
Showing 1-10 of 30 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, October is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $404). Flying from Ontario to Puerto Rico in November is currently the most expensive (average of $824). 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.
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 56 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
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 September 2, 2026.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Comfort
8.0
Crew
8.6
Boarding
8.1
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Ontario to Puerto Rico. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Ontario to Puerto Rico
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Puerto Rico by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Ontario to Puerto Rico by cabin class
Find flights from Ontario to Puerto Rico, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and Puerto Rico flights
Browse other Ontario and Puerto Rico flight options. Last updated on September 2, 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 7,457,451 searches. Data last updated September 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$168 | Average$530 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$528 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$376 | Average$577 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$419 | Average$562 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$460 | Average$561 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$473 | Average$551 | FlexibilityNo cancel fee | On-time62% |