$202+ Cheap flights from Ontario (ONT) to Luis Munoz Marin Intl (SJU)
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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Aug 16 — Aug 231
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Luis Munoz Marin Intl 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 Luis Munoz Marin Intl
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Cheapest flights from Ontario to Luis Munoz Marin IntlExplore the most affordable flight options available from Ontario to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 17, 2026.
Explore the most affordable flight options available from Ontario to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 17, 2026.
This United Airlines deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/225:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Sat 10/317:25 am
SJU
- ONT
2 stops16h 31m
United Airlines
Deal found 7/12![United Airlines logo]()
$384
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Sun 9/67:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 7/17![United Airlines logo]()
$404
This Southwest deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:05 pm
ONT
- SJU
2 stops10h 15m
Southwest
Fri 10/305:00 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 7/14![Southwest logo]()
$414
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:55 am
ONT
- SJU
2 stops12h 00m
Southwest
Mon 11/165:45 am
SJU
- ONT
2 stops12h 55m
Southwest
Deal found 7/16![Southwest logo]()
$435
This American Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/110:34 pm
ONT
- SJU
1 stop10h 30m
American Airlines
Fri 11/136:44 am
SJU
- ONT
1 stop19h 39m
American Airlines
Deal found 7/13![American Airlines logo]()
$436
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/295:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Mon 11/98:05 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 7/16![United Airlines logo]()
$437
This Southwest deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:55 am
ONT
- SJU
2 stops12h 00m
Southwest
Sat 11/145:40 am
SJU
- ONT
2 stops13h 20m
Southwest
Deal found 7/14![Southwest logo]()
$462
This Southwest deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:30 pm
ONT
- SJU
2 stops11h 25m
Southwest
Sat 8/225:05 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 7/13![Southwest logo]()
$463
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/126:55 am
ONT
- SJU
2 stops12h 00m
Southwest
Sun 11/155:35 am
SJU
- ONT
2 stops12h 30m
Southwest
Deal found 7/16![Southwest logo]()
$471
Best flights from Ontario to Luis Munoz Marin IntlDiscover carefully curated flight deals from Ontario to Luis Munoz Marin Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 17, 2026.
Discover carefully curated flight deals from Ontario to Luis Munoz Marin Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 17, 2026.
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:53 pm
ONT
- SJU
2 stops12h 57m
United Airlines
Thu 12/172:21 pm
SJU
- ONT
1 stop10h 48m
United Airlines
Deal found 7/14![United Airlines logo]()
$404
This JetBlue deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:13 pm
ONT
- SJU
1 stop10h 12m
JetBlue
Fri 9/1110:30 am
SJU
- ONT
1 stop12h 43m
JetBlue
Deal found 7/15![JetBlue logo]()
$546
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:00 am
ONT
- SJU
2 stops13h 50m
United Airlines
Tue 9/157:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 7/15![United Airlines logo]()
$494
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/245:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Sun 9/272:00 pm
SJU
- ONT
1 stop9h 58m
United Airlines
Deal found 7/14![United Airlines logo]()
$557
This JetBlue deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2911:13 pm
ONT
- SJU
1 stop12h 01m
JetBlue
Wed 9/21:13 pm
SJU
- ONT
1 stop12h 24m
JetBlue
Deal found 7/12![JetBlue logo]()
$626
This United Airlines deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Mon 10/192:00 pm
SJU
- ONT
1 stop9h 58m
United Airlines
Deal found 7/14![United Airlines logo]()
$557
This JetBlue deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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.
Fri 8/2111:59 pm
ONT
- SJU
1 stop13h 58m
JetBlue
Thu 8/271:13 pm
SJU
- ONT
1 stop12h 25m
JetBlue
Deal found 7/17![JetBlue logo]()
$629
This United Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/175:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Sat 10/242:00 pm
SJU
- ONT
1 stop9h 58m
United Airlines
Deal found 7/13![United Airlines logo]()
$600
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/25:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Wed 12/93:46 pm
SJU
- ONT
1 stop9h 35m
United Airlines
Deal found 7/16![United Airlines logo]()
$630
This United Airlines deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/165:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Sun 9/202:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 7/12![United Airlines logo]()
$673
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 8/265:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Sun 8/302:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 7/17![United Airlines logo]()
$695
Last-minute flights from Ontario to Luis Munoz Marin IntlDiscover last-minute flight deals from Ontario to Luis Munoz Marin Intl. Data last updated July 17, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Luis Munoz Marin Intl. Data last updated July 17, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 7/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/15:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Fri 8/287:00 am
SJU
- ONT
2 stops14h 11m
United Airlines
Deal found 7/15![United Airlines logo]()
$552
This American Airlines deal was found by Cheapflights users on 7/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/35:34 am
ONT
- SJU
2 stops13h 25m
American Airlines
Mon 8/312:58 am
SJU
- ONT
1 stop11h 31m
American Airlines
Deal found 7/12![American Airlines logo]()
$495
This American Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/512:59 pm
ONT
- SJU
2 stops20h 41m
American Airlines
Wed 8/127:03 am
SJU
- ONT
2 stops14h 12m
American Airlines
Deal found 7/13![American Airlines logo]()
$501
This Kiwi.com deal was found by Cheapflights users on 7/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/58:17 am
ONT
- SJU
1 stop17h 45m
Frontier
Wed 8/126:00 am
SJU
- ONT
2 stops28h 32m
Frontier
Deal found 7/14![Frontier logo]()
$549
This American Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:15 am
ONT
- SJU
2 stops14h 44m
American Airlines
Thu 8/1312:55 am
SJU
- ONT
2 stops14h 08m
American Airlines
Deal found 7/16![American Airlines logo]()
$496
This Southwest deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/108:40 pm
ONT
- SJU
2 stops11h 20m
Southwest
Thu 8/136:30 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 7/16![Southwest logo]()
$481
This Southwest deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:30 pm
ONT
- SJU
2 stops11h 25m
Southwest
Sat 8/225:05 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 7/13![Southwest logo]()
$463
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/237:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Sat 8/297:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 7/17![United Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 8/2512:33 pm
ONT
- SJU
2 stops18h 10m
American Airlines
Mon 8/317:24 pm
SJU
- ONT
2 stops17h 10m
American Airlines
Deal found 7/17![American Airlines logo]()
$520
This United Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/265:00 am
ONT
- SJU
2 stops12h 38m
United Airlines
Wed 9/27:00 am
SJU
- ONT
2 stops14h 16m
United Airlines
Deal found 7/13![United Airlines logo]()
$540
This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Sun 9/67:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 7/17![United Airlines logo]()
$404
One-way flights from Ontario to Luis Munoz Marin IntlSearch for one-way flight options from Ontario to Luis Munoz Marin Intl. Find affordable one-way fares based on user searches. Data last updated July 17, 2026.
Search for one-way flight options from Ontario to Luis Munoz Marin Intl. Find affordable one-way fares based on user searches. Data last updated July 17, 2026.
This Delta deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/157:05 am
ONT
- SJU
1 stop12h 24m
Delta
Deal found 7/16![Delta logo]()
$202
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/159:36 am
ONT
- SJU
2 stops35h 52m
Frontier
Deal found 7/16![Frontier logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 8/55:08 pm
ONT
- SJU
2 stops23h 24m
Frontier
Deal found 7/17![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 8/43:40 pm
ONT
- SJU
2 stops37h 17m
Frontier
Deal found 7/17![Frontier logo]()
$231
This American Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/66:15 am
ONT
- SJU
2 stops14h 44m
American Airlines
Deal found 7/16![American Airlines logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/64:09 pm
ONT
- SJU
2 stops36h 48m
Frontier
Deal found 7/16![Frontier logo]()
$236
This United Airlines deal was found by Cheapflights users on 7/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/307:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Deal found 7/13![United Airlines logo]()
$237
This Kiwi.com deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” 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 8/33:40 pm
ONT
- SJU
2 stops25h 02m
Frontier
Deal found 7/17![Frontier logo]()
$240
Find flight deals from Ontario to Luis Munoz Marin Intl
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Luis Munoz Marin Intl (SJU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $384 (United Airlines) |
One-way from | $202 (Delta) |
Popular in | December |
Cheapest in | October |
Average price | $594 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Luis Munoz Marin Intl 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 July 17, 2026.
Use the filters below to find and compare flights from Ontario to San Juan Luis Munoz Marin Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 12/5
6:53 pm-11:50 am
2 stops12h 57m
San Juan Luis Munoz Marin Intl
Thu 12/17
2:21 pm-9:09 pm
1 stop10h 48m
$404
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 9/12
7:00 am-11:50 pm
2 stops13h 50m
San Juan Luis Munoz Marin Intl
Tue 9/15
7:00 am-8:01 pm
2 stops16h 01m
$494
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 9/5
11:13 pm-12:25 pm
1 stop10h 12m
San Juan Luis Munoz Marin Intl
Fri 9/11
10:30 am-8:13 pm
1 stop12h 43m
$546
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 9/24
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Sun 9/27
2:00 pm-8:58 pm
1 stop9h 58m
$557
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 10/16
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Mon 10/19
2:00 pm-8:58 pm
1 stop9h 58m
$557
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 10/17
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Sat 10/24
2:00 pm-8:58 pm
1 stop9h 58m
$600
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 8/29
11:13 pm-2:14 pm
1 stop12h 01m
San Juan Luis Munoz Marin Intl
Wed 9/2
1:13 pm-10:37 pm
1 stop12h 24m
$626
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 8/21
11:59 pm-4:57 pm
1 stop13h 58m
San Juan Luis Munoz Marin Intl
Thu 8/27
1:13 pm-10:38 pm
1 stop12h 25m
$629
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 12/2
5:00 am-6:25 pm
1 stop9h 25m
San Juan Luis Munoz Marin Intl
Wed 12/9
3:46 pm-9:21 pm
1 stop9h 35m
$630
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 9/16
5:00 am-8:38 pm
2 stops12h 38m
San Juan Luis Munoz Marin Intl
Sun 9/20
2:20 pm-9:59 pm
1 stop10h 39m
$673
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Ontario to Luis Munoz Marin Intl
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Luis Munoz Marin Intl in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-San Juan Luis Munoz Marin Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-San Juan Luis Munoz Marin Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-San Juan Luis Munoz Marin Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-San Juan Luis Munoz Marin Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-San Juan Luis Munoz Marin Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Luis Munoz Marin Intl
Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Ontario with our price prediction graph.
ONT-SJU
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 San Juan Luis Munoz Marin Intl Airport
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How far ahead should I book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport?
The best time to book flights from Ontario to San Juan Luis Munoz Marin Intl Airport is 88 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport?
Currently, October is the cheapest month in which you can book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport (average of $391). Flying from Ontario to San Juan Luis Munoz Marin Intl Airport in December is currently the most expensive (average of $652). 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 much does it cost to fly round-trip from Ontario to San Juan Luis Munoz Marin Intl Airport?
What’s the top layover airport for flights from Ontario to San Juan Luis Munoz Marin Intl Airport?
Share of 1-stop round-trip flights from Ontario to San Juan Luis Munoz Marin Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Atlanta (ATL) – chosen by Cheapflights users on 50% of 1-stop itineraries from Ontario to San Juan Luis Munoz Marin Intl Airport on Cheapflights.
What’s the cheapest layover airport for flights from Ontario to San Juan Luis Munoz Marin Intl Airport?
Average round-trip fare for 1-stop flights from Ontario to San Juan Luis Munoz Marin Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Atlanta (ATL) is the most affordable 1-stop option, with an average round-trip price of $584.
What’s the fastest layover option from Ontario to San Juan Luis Munoz Marin Intl Airport?
Shortest average travel time for 1-stop one-way flights from Ontario to San Juan Luis Munoz Marin Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Denver (DEN) have the shortest average one-way travel time for 1-stop routes: 9h 28m.
Which airport typically offers the quickest layover for flights from Ontario to San Juan Luis Munoz Marin Intl Airport?
Average layover duration for 1-stop one-way flights from Ontario to San Juan Luis Munoz Marin Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Denver (DEN) offer the fastest connection on this route, with an average layover time of 1h 03m.
Reviews of airlines servicing Luis Munoz Marin Intl
Get insights into the airlines that provide service to Luis Munoz Marin Intl. 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 Luis Munoz Marin Intl. Reviews last updated July 17, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Ontario to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Boarding
8.1
Crew
8.6
Overall
8.0
Entertainment
7.5
Comfort
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 Luis Munoz Marin Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Juan Luis Munoz Marin Intl Airport?
Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locationsFajardo
Luquillo
Rio Grande
Dorado
Humacao
Bayamón
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Other flights to Luis Munoz Marin Intl
Explore flights to Luis Munoz Marin Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 17, 2026.
Ontario and Luis Munoz Marin Intl flights
Browse other Ontario and Luis Munoz Marin Intl flight options. Last updated on July 17, 2026.
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Top 6 airlines flying from Ontario to Luis Munoz Marin Intl
Discover the top 6 airlines that operate flights from Ontario to Luis Munoz Marin Intl. 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 July 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$168 | Average$530 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$176 | Average$513 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$318 | Average$526 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$360 | Average$577 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$419 | Average$562 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$561 | FlexibilityNo cancel fee | On-time62% |