$192+ Cheap flights from San Juan to Ontario (ONT)
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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Jul 24 — Jul 311
Round-trip
1 adult, Economy
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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
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Cheapest flights from San Juan to OntarioExplore the most affordable flight options available from San Juan to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 24, 2026.
Explore the most affordable flight options available from San Juan to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 24, 2026.
This Delta deal was found by Cheapflights users on 6/24. 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 9/252:59 pm
SJU
- ONT
1 stop10h 27m
Delta
Wed 9/306:00 pm
ONT
- SJU
2 stops15h 03m
Delta
Deal found 6/24![Delta logo]()
$384
This American Airlines deal was found by Cheapflights users on 6/19. 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 10/288:35 am
SJU
- ONT
1 stop14h 29m
American Airlines
Sat 10/317:20 am
ONT
- SJU
1 stop13h 13m
American Airlines
Deal found 6/19![American Airlines logo]()
$393
This American Airlines deal was found by Cheapflights users on 6/24. 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 9/256:27 am
SJU
- ONT
2 stops19h 10m
American Airlines
Wed 9/3012:37 pm
ONT
- SJU
2 stops17h 47m
American Airlines
Deal found 6/24![American Airlines logo]()
$396
This American Airlines deal was found by Cheapflights users on 6/23. 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 8/217:30 am
SJU
- ONT
2 stops13h 45m
American Airlines
Mon 8/314:07 pm
ONT
- SJU
2 stops17h 33m
American Airlines
Deal found 6/23![American Airlines logo]()
$437
This United Airlines deal was found by Cheapflights users on 6/23. 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 9/121:00 am
SJU
- ONT
2 stops14h 50m
United Airlines
Thu 9/177:13 pm
ONT
- SJU
2 stops14h 41m
United Airlines
Deal found 6/23![United Airlines logo]()
$442
This United Airlines deal was found by Cheapflights users on 6/22. 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 9/237:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Sat 9/265:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 6/22![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 6/23. 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 8/292:00 pm
SJU
- ONT
1 stop9h 53m
United Airlines
Sun 9/66:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Deal found 6/23![United Airlines logo]()
$479
This Southwest deal was found by Cheapflights users on 6/23. 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 9/135:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Thu 9/1711:00 am
ONT
- SJU
2 stops9h 50m
Southwest
Deal found 6/23![Southwest logo]()
$490
This JetBlue deal was found by Cheapflights users on 6/22. 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 8/2811:50 am
SJU
- ONT
1 stop13h 48m
JetBlue
Mon 8/3111:59 pm
ONT
- SJU
1 stop13h 00m
JetBlue
Deal found 6/22![JetBlue logo]()
$491
This American Airlines deal was found by Cheapflights users on 6/23. 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 8/283:44 pm
SJU
- ONT
2 stops23h 19m
American Airlines
Sun 9/68:01 pm
ONT
- SJU
2 stops24h 58m
American Airlines
Deal found 6/23![American Airlines logo]()
$500
This American Airlines deal was found by Cheapflights users on 6/22. 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 11/76:44 am
SJU
- ONT
1 stop15h 38m
American Airlines
Mon 11/2310:34 pm
ONT
- SJU
1 stop18h 58m
American Airlines
Deal found 6/22![American Airlines logo]()
$504
Best flights from San Juan to OntarioDiscover carefully curated flight deals from San Juan to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 24, 2026.
Discover carefully curated flight deals from San Juan to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 24, 2026.
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/287:30 am
SJU
- ONT
2 stops18h 13m
Delta
Sat 10/315:50 pm
ONT
- SJU
2 stops15h 46m
Delta
Deal found 6/19![Delta logo]()
$384
This American Airlines deal was found by Cheapflights users on 6/19. 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 10/288:35 am
SJU
- ONT
1 stop14h 29m
American Airlines
Sat 10/318:00 pm
ONT
- SJU
2 stops14h 04m
American Airlines
Deal found 6/19![American Airlines logo]()
$393
This Southwest deal was found by Cheapflights users on 6/19. 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 9/161:45 pm
SJU
- ONT
2 stops11h 20m
Southwest
Sat 9/193:15 pm
ONT
- SJU
2 stops16h 30m
Southwest
Deal found 6/19![Southwest logo]()
$442
This United Airlines deal was found by Cheapflights users on 6/19. 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 9/167:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Sat 9/195:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 6/19![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 6/21. 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 10/212:55 pm
SJU
- ONT
1 stop10h 04m
United Airlines
Sun 11/15:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Deal found 6/21![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 6/22. 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 9/237:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Sat 9/265:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 6/22![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 6/20. 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 9/57:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Sun 9/66:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Deal found 6/20![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 6/22. 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 10/242:00 pm
SJU
- ONT
1 stop9h 58m
United Airlines
Sun 11/15:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Deal found 6/22![United Airlines logo]()
$479
This United Airlines deal was found by Cheapflights users on 6/22. 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 8/247:00 am
SJU
- ONT
2 stops14h 11m
United Airlines
Sun 8/307:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Deal found 6/22![United Airlines logo]()
$537
Last-minute flights from San Juan to OntarioDiscover last-minute flight deals from San Juan to Ontario. Data last updated June 24, 2026 and is based on user searches.
Discover last-minute flight deals from San Juan to Ontario. Data last updated June 24, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/20. 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 6/222:05 am
SJU
- ONT
2 stops13h 42m
United Airlines
Fri 6/265:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Deal found 6/20![United Airlines logo]()
$650
This American Airlines deal was found by Cheapflights users on 6/22. 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 6/246:01 am
SJU
- ONT
2 stops15h 20m
American Airlines
Mon 7/277:15 pm
ONT
- SJU
2 stops11h 30m
American Airlines
Deal found 6/22![American Airlines logo]()
$625
This Southwest deal was found by Cheapflights users on 6/22. 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 6/296:00 am
SJU
- ONT
2 stops12h 25m
Southwest
Mon 7/279:40 am
ONT
- SJU
1 stop11h 55m
Southwest
Deal found 6/22![Southwest logo]()
$593
This United Airlines deal was found by Cheapflights users on 6/21. 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 7/12:05 am
SJU
- ONT
2 stops13h 07m
United Airlines
Tue 8/45:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Deal found 6/21![United Airlines logo]()
$572
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/72:05 am
SJU
- ONT
2 stops13h 07m
United Airlines
Sat 8/85:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 6/23![United Airlines logo]()
$532
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/72:05 am
SJU
- ONT
2 stops13h 07m
United Airlines
Thu 7/165:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Deal found 6/21![United Airlines logo]()
$665
This JetBlue deal was found by Cheapflights users on 6/20. 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.
Wed 7/81:10 pm
SJU
- ONT
1 stop12h 34m
JetBlue
Sat 8/811:24 pm
ONT
- SJU
1 stop13h 34m
JetBlue
Deal found 6/20![JetBlue logo]()
$679
This Faresmojo deal was found by Cheapflights users on 6/19. 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 Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/141:40 pm
SJU
- ONT
1 stop10h 02m
JetBlue
Wed 7/155:45 am
ONT
- SJU
1 stop11h 53m
JetBlue
Deal found 6/19![JetBlue logo]()
$534
This Kiwi.com deal was found by Cheapflights users on 6/19. 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 7/146:44 am
SJU
- ONT
2 stops20h 06m
Frontier
Wed 7/158:17 am
ONT
- SJU
1 stop17h 45m
Frontier
Deal found 6/19![Frontier logo]()
$664
This Faresmojo deal was found by Cheapflights users on 6/21. 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 Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/181:10 pm
SJU
- ONT
1 stop11h 49m
JetBlue
Mon 8/311:51 pm
ONT
- SJU
1 stop13h 08m
JetBlue
Deal found 6/21![JetBlue logo]()
$533
One-way flights from San Juan to OntarioSearch for one-way flight options from San Juan to Ontario. Find affordable one-way fares based on user searches. Data last updated June 24, 2026.
Search for one-way flight options from San Juan to Ontario. Find affordable one-way fares based on user searches. Data last updated June 24, 2026.
This Delta deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/101:55 pm
SJU
- ONT
1 stop12h 19m
Delta
Deal found 6/19![Delta logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 6/23. 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 8/76:00 am
SJU
- ONT
2 stops28h 32m
Frontier
Deal found 6/23![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/307:30 am
SJU
- ONT
2 stops51h 02m
Frontier
Deal found 6/22![Frontier logo]()
$232
This United Airlines deal was found by Cheapflights users on 6/20. 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 9/52:00 pm
SJU
- ONT
1 stop9h 53m
United Airlines
Deal found 6/20![United Airlines logo]()
$237
This United Airlines deal was found by Cheapflights users on 6/19. 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 11/107:40 am
SJU
- ONT
2 stops16h 26m
United Airlines
Deal found 6/19![United Airlines logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/146:44 am
SJU
- ONT
2 stops30h 20m
Frontier
Deal found 6/22![Frontier logo]()
$254
This Frontier deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/46:25 am
SJU
- ONT
1 stop13h 23m
Frontier
Deal found 6/22![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 6/21. 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 7/155:22 pm
SJU
- ONT
2 stops17h 41m
Frontier
Deal found 6/21![Frontier logo]()
$262
This Priceline deal was found by Cheapflights users on 6/21. 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 8/185:01 am
SJU
- ONT
1 stop20h 36m
JetBlue
Deal found 6/21![JetBlue logo]()
$272
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/278:37 pm
SJU
- ONT
2 stops30h 13m
Frontier
Deal found 6/22![Frontier logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 6/22. 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 7/316:00 am
SJU
- ONT
2 stops28h 32m
Frontier
Deal found 6/22![Frontier logo]()
$278
This Southwest deal was found by Cheapflights users on 6/23. 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 7/305:00 am
SJU
- ONT
2 stops11h 50m
Southwest
Deal found 6/23![Southwest logo]()
$283
Find flight deals from San Juan to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to Ontario (ONT). 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 June 24, 2026.
Round-trip from | $384 (Delta) |
|---|---|
One-way from | $192 (Delta) |
Popular in | March |
Cheapest in | January |
Average price | $537 |
Cheapflights Fare Finder
Customize your flight search to find flights from San Juan to Ontario 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 June 24, 2026.
Use the filters below to find and compare flights from San Juan to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Wed 10/28
7:30 am-10:43 pm
2 stops18h 13m
Ontario
Sat 10/31
5:50 pm-12:36 pm
2 stops15h 46m
$384
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Wed 10/28
8:35 am-8:04 pm
1 stop14h 29m
Ontario
Sat 10/31
8:00 pm-1:04 pm
2 stops14h 04m
$393
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Wed 9/16
1:45 pm-10:05 pm
2 stops11h 20m
Ontario
Sat 9/19
3:15 pm-10:45 am
2 stops16h 30m
$442
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Wed 9/16
7:00 am-8:01 pm
2 stops16h 01m
Ontario
Sat 9/19
5:00 am-5:38 pm
1 stop9h 38m
$474
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Wed 10/21
2:55 pm-9:59 pm
1 stop10h 04m
Ontario
Sun 11/1
5:00 am-6:25 pm
1 stop9h 25m
$474
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Wed 9/23
7:00 am-8:01 pm
2 stops16h 01m
Ontario
Sat 9/26
5:00 am-5:38 pm
1 stop9h 38m
$474
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Sat 9/5
7:00 am-8:01 pm
2 stops16h 01m
Ontario
Sun 9/6
6:00 am-8:38 pm
1 stop11h 38m
$474
Quickest round-trip
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Sat 10/24
2:00 pm-8:58 pm
1 stop9h 58m
Ontario
Sun 11/1
5:00 am-6:25 pm
1 stop9h 25m
$479
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Mon 8/24
7:00 am-6:11 pm
2 stops14h 11m
Ontario
Sun 8/30
7:13 pm-3:42 pm
2 stops17h 29m
$537
Cheapest one-way
Quickest one-way
San JuanOntario
SJU - ONT
SJUONT
San Juan Luis Munoz Marin Intl
Sat 9/5
2:00 pm-8:53 pm
1 stop9h 53m
$237
Showing 1-10 of 19 resultsSorted by cheapest first
Best time to book a flight from San Juan to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from San Juan with our price prediction graph.
PR1-ONT
SJU-ONT
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 San Juan to Ontario
PR1-ONT
SJU-ONT
What is the cheapest month to book a flight from San Juan to Ontario?
Currently, May is the cheapest month in which you can book a flight from San Juan to Ontario (average of $267). Flying from San Juan to Ontario in March is currently the most expensive (average of $556). 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 San Juan to Ontario?
How far ahead should I book a flight from San Juan to Ontario?
The best time to book flights from San Juan to Ontario is 22 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.
Reviews of airlines servicing Ontario
Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated June 24, 2026.
Read through reviews of airlines operating flights from San Juan to Ontario, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Related info for your journey
Find useful and relevant information for your journey from San Juan to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for San Juan to Ontario
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from San Juan to Ontario by cabin class
Find flights from San Juan to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on June 24, 2026.
San Juan and Ontario flights
Browse other San Juan and Ontario flight options. Last updated on June 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from San Juan to Ontario
Discover the top 3 airlines that operate flights from San Juan to Ontario. 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 June 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$365 | Average$600 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$367 | Average$520 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$389 | Average$570 | FlexibilityNo cancel fee | On-time63% |