$187+ Cheap flights from Ontario (ONT) to San Juan
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 6/29. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Jul 7 — Jul 141
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to San Juan 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
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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 San Juan
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Cheapest flights from Ontario to San JuanExplore the most affordable flight options available from Ontario to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 7, 2026.
Explore the most affordable flight options available from Ontario to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 7, 2026.
This American Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/202:27 pm
ONT
- SJU
2 stops19h 21m
American Airlines
Sun 8/237:24 pm
SJU
- ONT
2 stops17h 10m
American Airlines
Deal found 6/2![American Airlines logo]()
$374
This American Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2212:59 pm
ONT
- SJU
2 stops20h 49m
American Airlines
Fri 8/287:22 pm
SJU
- ONT
2 stops17h 12m
American Airlines
Deal found 6/2![American Airlines logo]()
$381
This United Airlines deal was found by Cheapflights users on 6/5. 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 8/176:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Sat 8/227:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 6/5![United Airlines logo]()
$384
This American Airlines deal was found by Cheapflights users on 6/4. 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 8/196:15 am
ONT
- SJU
2 stops14h 44m
American Airlines
Tue 8/257:24 pm
SJU
- ONT
2 stops17h 10m
American Airlines
Deal found 6/4![American Airlines logo]()
$389
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/81:00 pm
ONT
- SJU
2 stops17h 10m
Southwest
Fri 8/146:30 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 6/4![Southwest logo]()
$422
This American Airlines deal was found by Cheapflights users on 6/6. 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 8/152:43 pm
ONT
- SJU
2 stops20h 55m
American Airlines
Mon 8/247:22 pm
SJU
- ONT
2 stops17h 12m
American Airlines
Deal found 6/6![American Airlines logo]()
$432
This Delta deal was found by Cheapflights users on 6/5. 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 11/37:00 am
ONT
- SJU
1 stop11h 59m
Delta
Wed 11/111:55 pm
SJU
- ONT
1 stop12h 19m
Delta
Deal found 6/5![Delta logo]()
$442
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/88:17 am
ONT
- SJU
2 stops37h 24m
Frontier
Fri 8/146:32 am
SJU
- ONT
1 stop29h 09m
Frontier
Deal found 6/4![Frontier logo]()
$463
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/247:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Tue 9/17:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 6/3![United Airlines logo]()
$464
This American Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/910:34 pm
ONT
- SJU
1 stop13h 20m
American Airlines
Fri 11/206:25 am
SJU
- ONT
2 stops13h 36m
American Airlines
Deal found 6/3![American Airlines logo]()
$472
This United Airlines deal was found by Cheapflights users on 6/4. 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 11/105:00 am
ONT
- SJU
2 stops15h 36m
United Airlines
Thu 11/127:45 am
SJU
- ONT
2 stops14h 02m
United Airlines
Deal found 6/4![United Airlines logo]()
$474
This Southwest deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/116:20 am
ONT
- SJU
2 stops10h 45m
Southwest
Sun 9/135:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 6/3![Southwest logo]()
$480
Best flights from Ontario to San JuanDiscover carefully curated flight deals from Ontario to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 7, 2026.
Discover carefully curated flight deals from Ontario to San Juan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 7, 2026.
This Delta deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/910:00 pm
ONT
- SJU
1 stop10h 46m
Delta
Fri 8/212:59 pm
SJU
- ONT
1 stop9h 53m
Delta
Deal found 6/6![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 6/6. 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 8/155:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Mon 8/242:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 6/6![United Airlines logo]()
$474
This JetBlue deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/511:51 pm
ONT
- SJU
1 stop13h 07m
JetBlue
Mon 8/101:30 pm
SJU
- ONT
1 stop12h 05m
JetBlue
Deal found 6/3![JetBlue logo]()
$701
This Delta deal was found by Cheapflights users on 6/6. 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.
Mon 8/1710:00 pm
ONT
- SJU
1 stop12h 42m
Delta
Fri 8/212:59 pm
SJU
- ONT
1 stop9h 53m
Delta
Deal found 6/6![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 6/6. 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 9/256:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Wed 9/302:55 pm
SJU
- ONT
1 stop10h 04m
United Airlines
Deal found 6/6![United Airlines logo]()
$474
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Sat 8/227:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 6/3![United Airlines logo]()
$544
This United Airlines deal was found by Cheapflights users on 6/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/146:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Mon 8/242:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 6/6![United Airlines logo]()
$602
This JetBlue deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/2411:51 pm
ONT
- SJU
1 stop13h 08m
JetBlue
Fri 8/71:30 pm
SJU
- ONT
1 stop12h 05m
JetBlue
Deal found 6/3![JetBlue logo]()
$740
This United Airlines deal was found by Cheapflights users on 6/6. 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 8/236:00 am
ONT
- SJU
1 stop11h 38m
United Airlines
Thu 8/272:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 6/6![United Airlines logo]()
$615
This United Airlines deal was found by Cheapflights users on 6/5. 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 11/105:00 am
ONT
- SJU
1 stop9h 25m
United Airlines
Mon 11/232:25 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 6/5![United Airlines logo]()
$682
This United Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/165:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Mon 10/192:00 pm
SJU
- ONT
1 stop9h 52m
United Airlines
Deal found 6/2![United Airlines logo]()
$756
This United Airlines deal was found by Cheapflights users on 6/6. 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 11/117:00 am
ONT
- SJU
1 stop10h 00m
United Airlines
Tue 11/242:25 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 6/6![United Airlines logo]()
$762
Last-minute flights from Ontario to San JuanDiscover last-minute flight deals from Ontario to San Juan. Data last updated June 7, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Juan. Data last updated June 7, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/410:00 am
ONT
- SJU
1 stop8h 50m
Southwest
Tue 7/710:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 6/4![Southwest logo]()
$588
This Southwest deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/79:55 am
ONT
- SJU
2 stops11h 25m
Southwest
Mon 7/1311:35 am
SJU
- ONT
2 stops12h 30m
Southwest
Deal found 6/3![Southwest logo]()
$586
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/73:40 pm
ONT
- SJU
2 stops22h 51m
Frontier
Tue 7/146:32 am
SJU
- ONT
1 stop29h 05m
Frontier
Deal found 6/3![Frontier logo]()
$589
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/88:17 am
ONT
- SJU
1 stop17h 45m
Frontier
Mon 7/1310:48 pm
SJU
- ONT
2 stops38h 16m
Frontier
Deal found 6/3![Frontier logo]()
$577
This American Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/291:11 pm
ONT
- SJU
2 stops12h 28m
American Airlines
Mon 8/37:25 am
SJU
- ONT
1 stop18h 09m
American Airlines
Deal found 6/2![American Airlines logo]()
$574
This American Airlines deal was found by Cheapflights users on 6/4. 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 7/307:15 pm
ONT
- SJU
2 stops12h 49m
American Airlines
Fri 8/76:00 am
SJU
- ONT
2 stops15h 15m
American Airlines
Deal found 6/4![American Airlines logo]()
$547
This Southwest deal was found by Cheapflights users on 6/4. 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 7/309:40 am
ONT
- SJU
1 stop11h 55m
Southwest
Fri 8/76:30 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 6/4![Southwest logo]()
$580
This Southwest deal was found by Cheapflights users on 6/4. 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 7/319:40 am
ONT
- SJU
1 stop11h 55m
Southwest
Fri 8/76:30 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 6/4![Southwest logo]()
$512
This American Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/312:15 pm
ONT
- SJU
1 stop11h 24m
American Airlines
Thu 8/66:00 am
SJU
- ONT
2 stops15h 15m
American Airlines
Deal found 6/3![American Airlines logo]()
$578
One-way flights from Ontario to San JuanSearch for one-way flight options from Ontario to San Juan. Find affordable one-way fares based on user searches. Data last updated June 7, 2026.
Search for one-way flight options from Ontario to San Juan. Find affordable one-way fares based on user searches. Data last updated June 7, 2026.
This American Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/297:13 pm
ONT
- SJU
2 stops12h 49m
American Airlines
Deal found 6/3![American Airlines logo]()
$187
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/36:10 am
ONT
- SJU
1 stop11h 24m
United Airlines
Deal found 6/3![United Airlines logo]()
$203
This SmartFares deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:50 pm
ONT
- SJU
1 stop11h 08m
JetBlue
Deal found 6/3![JetBlue logo]()
$221
This United Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/296:10 am
ONT
- SJU
1 stop11h 24m
United Airlines
Deal found 6/2![United Airlines logo]()
$232
This American Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/249:59 am
ONT
- SJU
2 stops19h 40m
American Airlines
Deal found 6/2![American Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/198:40 pm
ONT
- SJU
2 stops11h 05m
Southwest
Deal found 6/3![Southwest logo]()
$267
This American Airlines deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/257:30 pm
ONT
- SJU
2 stops10h 09m
American Airlines
Deal found 6/2![American Airlines logo]()
$272
This United Airlines deal was found by Cheapflights users on 6/4. 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 6/135:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 6/4![United Airlines logo]()
$285
Find flight deals from Ontario to San Juan
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to San Juan (PR1). 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 7, 2026.
Round-trip from | $374 (United Airlines) |
|---|---|
One-way from | $187 (American Airlines) |
Popular in | December |
Cheapest in | October |
Average price | $613 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to San Juan 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 7, 2026.
Use the filters below to find and compare flights from Ontario to San Juan that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 8/9
10:00 pm-11:46 am
1 stop10h 46m
San Juan Luis Munoz Marin Intl
Fri 8/21
2:59 pm-9:52 pm
1 stop9h 53m
$384
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 8/17
10:00 pm-1:42 pm
1 stop12h 42m
San Juan Luis Munoz Marin Intl
Fri 8/21
2:59 pm-9:52 pm
1 stop9h 53m
$384
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 8/15
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Mon 8/24
2:20 pm-9:59 pm
1 stop10h 39m
$474
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 9/25
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Wed 9/30
2:55 pm-9:59 pm
1 stop10h 04m
$474
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 8/14
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Sat 8/22
7:00 am-8:01 pm
2 stops16h 01m
$544
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 8/14
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Mon 8/24
2:20 pm-9:59 pm
1 stop10h 39m
$602
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 8/23
6:00 am-8:38 pm
1 stop11h 38m
San Juan Luis Munoz Marin Intl
Thu 8/27
2:20 pm-9:59 pm
1 stop10h 39m
$615
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 11/10
5:00 am-6:25 pm
1 stop9h 25m
San Juan Luis Munoz Marin Intl
Mon 11/23
2:25 pm-8:20 pm
1 stop9h 55m
$682
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 8/5
11:51 pm-3:58 pm
1 stop13h 07m
San Juan Luis Munoz Marin Intl
Mon 8/10
1:30 pm-10:35 pm
1 stop12h 05m
$701
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 7/24
11:51 pm-3:59 pm
1 stop13h 08m
San Juan Luis Munoz Marin Intl
Fri 8/7
1:30 pm-10:35 pm
1 stop12h 05m
$740
Showing 1-10 of 19 resultsSorted by cheapest first
Best time to book a flight from Ontario to San Juan
Have a flexible travel schedule? Discover the best time to fly to San Juan from Ontario with our price prediction graph.
ONT-PR1
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
ONT-PR1
ONT-SJU
What is the cheapest month to book a flight from Ontario to San Juan?
Currently, November is the cheapest month in which you can book a flight from Ontario to San Juan (average of $120). Flying from Ontario to San Juan in May is currently the most expensive (average of $355). 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?
How far ahead should I book a flight from Ontario to San Juan?
To ensure you get the cheapest price possible for a flight from Ontario to San Juan, you should look to book at least 15 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
Reviews of airlines servicing San Juan
Get insights into the airlines that provide service to San Juan. 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 San Juan. Reviews last updated June 7, 2026.
Read reviews from past customers who have flown Southwest,Delta, andUnited Airlines from Ontario to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Entertainment
7.5
Overall
8.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Food
7.0
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 San Juan. 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 San Juan
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Complete your trip
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Search flights from Ontario to San Juan by cabin class
Find flights from Ontario to San Juan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Ontario and San Juan flights
Browse other Ontario and San Juan flight options. Last updated on June 7, 2026.
Other flights from Ontario
Browse through other flights departing from Ontario. Flights are based on user searches made on Cheapflights and were last updated on June 7, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Ontario to San Juan
Discover the top 6 airlines that operate flights from Ontario to San Juan. 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 7, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$137 | Average$467 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$552 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$546 | 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% |