$197+ 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 7/21. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Jul 22 — Jul 291
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to San Juan with Cheapflights
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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 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 22, 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 22, 2026.
This Delta deal was found by Cheapflights users on 6/18. 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 10/205:50 pm
ONT
- SJU
2 stops15h 06m
Delta
Thu 10/2212:46 pm
SJU
- ONT
1 stop12h 28m
Delta
Deal found 6/18![Delta logo]()
$384
This Delta deal was found by Cheapflights users on 6/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:50 pm
ONT
- SJU
2 stops15h 06m
Delta
Fri 10/167:00 am
SJU
- ONT
2 stops18h 43m
Delta
Deal found 6/17![Delta logo]()
$394
This Southwest deal was found by Cheapflights users on 6/18. 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 10/277:20 pm
ONT
- SJU
2 stops12h 20m
Southwest
Fri 10/305:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 6/18![Southwest logo]()
$429
This Southwest deal was found by Cheapflights users on 6/18. 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 11/611:55 pm
ONT
- SJU
1 stop11h 05m
Southwest
Mon 11/165:45 am
SJU
- ONT
2 stops12h 55m
Southwest
Deal found 6/18![Southwest logo]()
$434
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.
Sat 8/82:43 pm
ONT
- SJU
2 stops20h 55m
American Airlines
Sat 8/157:05 am
SJU
- ONT
2 stops14h 10m
American Airlines
Deal found 6/19![American Airlines logo]()
$437
This Delta deal was found by Cheapflights users on 6/18. 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 10/710:59 pm
ONT
- SJU
1 stop11h 22m
Delta
Wed 10/217:30 am
SJU
- ONT
1 stop13h 48m
Delta
Deal found 6/18![Delta logo]()
$442
This Delta deal was found by Cheapflights users on 6/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1410:00 pm
ONT
- SJU
1 stop10h 46m
Delta
Fri 8/212:59 pm
SJU
- ONT
1 stop9h 53m
Delta
Deal found 6/17![Delta logo]()
$452
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.
Sat 10/1011:59 pm
ONT
- SJU
1 stop12h 03m
American Airlines
Fri 10/168:35 am
SJU
- ONT
1 stop14h 29m
American Airlines
Deal found 6/19![American Airlines logo]()
$469
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.
Thu 8/277:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Mon 8/317:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 6/19![United Airlines logo]()
$474
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.
Fri 9/47:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Tue 9/87:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 6/19![United Airlines logo]()
$479
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.
Sat 10/105:20 am
ONT
- SJU
2 stops11h 50m
Southwest
Fri 10/165:00 am
SJU
- ONT
2 stops12h 10m
Southwest
Deal found 6/19![Southwest logo]()
$482
This United Airlines deal was found by Cheapflights users on 6/18. 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
ONT
- SJU
2 stops14h 50m
United Airlines
Wed 10/212:55 pm
SJU
- ONT
1 stop10h 04m
United Airlines
Deal found 6/18![United Airlines logo]()
$484
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 22, 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 22, 2026.
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.
Thu 8/277:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Mon 8/317:00 am
SJU
- ONT
2 stops16h 01m
United Airlines
Deal found 6/20![United Airlines logo]()
$474
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.
Sun 10/119:45 am
ONT
- SJU
2 stops12h 00m
Southwest
Fri 10/165:00 am
SJU
- ONT
2 stops12h 10m
Southwest
Deal found 6/19![Southwest logo]()
$514
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.
Sun 10/1110:59 pm
ONT
- SJU
1 stop9h 37m
Delta
Fri 10/1612:46 pm
SJU
- ONT
2 stops14h 02m
Delta
Deal found 6/19![Delta logo]()
$613
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.
Fri 10/25:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Tue 10/67:00 am
SJU
- ONT
2 stops13h 41m
United Airlines
Deal found 6/22![United Airlines logo]()
$474
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.
Tue 7/211:05 pm
ONT
- SJU
1 stop8h 45m
Southwest
Sat 8/155:05 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 6/19![Southwest logo]()
$535
This United Airlines deal was found by Cheapflights users on 6/18. 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
ONT
- SJU
1 stop9h 38m
United Airlines
Tue 10/132:00 pm
SJU
- ONT
1 stop9h 58m
United Airlines
Deal found 6/18![United Airlines logo]()
$524
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 7/205:50 am
ONT
- SJU
2 stops12h 40m
Southwest
Sat 8/155:05 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 6/22![Southwest logo]()
$581
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Fri 10/235:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Mon 10/261:25 pm
SJU
- ONT
1 stop9h 55m
United Airlines
Deal found 6/17![United Airlines logo]()
$617
This United Airlines deal was found by Cheapflights users on 6/17. 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 8/95:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Sun 8/162:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 6/17![United Airlines logo]()
$617
This United Airlines deal was found by Cheapflights users on 6/17. 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.
Thu 10/225:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Mon 10/262:46 pm
SJU
- ONT
1 stop9h 35m
United Airlines
Deal found 6/17![United Airlines logo]()
$657
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.
Sat 8/155:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Fri 8/217:00 am
SJU
- ONT
2 stops14h 11m
United Airlines
Deal found 6/21![United Airlines logo]()
$670
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.
Sat 8/155:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Thu 8/202:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 6/21![United Airlines logo]()
$670
Last-minute flights from Ontario to San JuanDiscover last-minute flight deals from Ontario to San Juan. Data last updated June 22, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Juan. Data last updated June 22, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 6/17. 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 6/285:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Mon 8/312:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 6/17![United Airlines logo]()
$582
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.
Mon 7/207:15 pm
ONT
- SJU
2 stops11h 30m
American Airlines
Sat 8/157:05 am
SJU
- ONT
2 stops14h 10m
American Airlines
Deal found 6/19![American Airlines logo]()
$490
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/209:40 am
ONT
- SJU
1 stop11h 55m
Southwest
Sat 8/156:25 am
SJU
- ONT
2 stops11h 50m
Southwest
Deal found 6/21![Southwest logo]()
$561
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.
Tue 7/211:05 pm
ONT
- SJU
1 stop8h 45m
Southwest
Sat 8/155:05 am
SJU
- ONT
2 stops12h 25m
Southwest
Deal found 6/19![Southwest logo]()
$535
This American Airlines deal was found by Cheapflights users on 6/17. 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.
Wed 7/296:11 am
ONT
- SJU
2 stops13h 48m
American Airlines
Wed 8/126:00 am
SJU
- ONT
2 stops15h 15m
American Airlines
Deal found 6/17![American Airlines logo]()
$545
This American Airlines deal was found by Cheapflights users on 6/18. 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 stops11h 30m
American Airlines
Thu 8/66:00 am
SJU
- ONT
2 stops15h 15m
American Airlines
Deal found 6/18![American Airlines logo]()
$500
This United Airlines deal was found by Cheapflights users on 6/18. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Thu 8/61:40 pm
SJU
- ONT
1 stop10h 02m
United Airlines
Deal found 6/18![United Airlines logo]()
$553
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.
Fri 7/311:18 pm
ONT
- SJU
2 stops13h 11m
United Airlines
Tue 8/42:05 am
SJU
- ONT
2 stops13h 07m
United Airlines
Deal found 6/19![United Airlines logo]()
$510
This American 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 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 stops12h 19m
American Airlines
Deal found 6/20![American Airlines logo]()
$548
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.
Fri 7/312:15 pm
ONT
- SJU
1 stop11h 24m
American Airlines
Wed 8/56:00 am
SJU
- ONT
2 stops15h 15m
American Airlines
Deal found 6/19![American Airlines logo]()
$580
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 22, 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 22, 2026.
This United Airlines deal was found by Cheapflights users on 6/18. 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 7/215:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 6/18![United Airlines logo]()
$197
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 8/45:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Deal found 6/21![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.
Sat 7/116:10 am
ONT
- SJU
1 stop11h 24m
United Airlines
Deal found 6/19![United Airlines logo]()
$242
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/127:15 pm
ONT
- SJU
2 stops11h 30m
American Airlines
Deal found 6/21![American Airlines logo]()
$245
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.
Sat 7/47:05 am
ONT
- SJU
1 stop10h 38m
Delta
Deal found 6/19![Delta logo]()
$250
This Priceline 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/311:51 pm
ONT
- SJU
1 stop19h 18m
JetBlue
Deal found 6/20![JetBlue logo]()
$272
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:15 pm
ONT
- SJU
2 stops11h 30m
American Airlines
Deal found 6/21![American Airlines logo]()
$275
This American Airlines deal was found by Cheapflights users on 6/18. 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 7/217:15 pm
ONT
- SJU
2 stops11h 30m
American Airlines
Deal found 6/18![American Airlines logo]()
$277
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.
Fri 7/35:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 6/19![United Airlines logo]()
$281
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/295:45 am
ONT
- SJU
1 stop19h 40m
American Airlines
Deal found 6/20![American Airlines logo]()
$290
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 22, 2026.
Round-trip from | $384 (Delta) |
|---|---|
One-way from | $197 (United 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 22, 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
Thu 8/27
7:13 pm-3:42 pm
2 stops17h 29m
San Juan Luis Munoz Marin Intl
Mon 8/31
7:00 am-8:01 pm
2 stops16h 01m
$474
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 10/2
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Tue 10/6
7:00 am-5:41 pm
2 stops13h 41m
$474
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 10/11
9:45 am-12:45 am
2 stops12h 00m
San Juan Luis Munoz Marin Intl
Fri 10/16
5:00 am-2:10 pm
2 stops12h 10m
$514
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 10/7
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Tue 10/13
2:00 pm-8:58 pm
1 stop9h 58m
$524
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 7/21
1:05 pm-12:50 am
1 stop8h 45m
San Juan Luis Munoz Marin Intl
Sat 8/15
5:05 am-2:30 pm
2 stops12h 25m
$535
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Mon 7/20
5:50 am-9:30 pm
2 stops12h 40m
San Juan Luis Munoz Marin Intl
Sat 8/15
5:05 am-2:30 pm
2 stops12h 25m
$581
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 10/11
10:59 pm-11:36 am
1 stop9h 37m
San Juan Luis Munoz Marin Intl
Fri 10/16
12:46 pm-11:48 pm
2 stops14h 02m
$613
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 10/23
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Mon 10/26
1:25 pm-8:20 pm
1 stop9h 55m
$617
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 8/9
5:45 am-8:38 pm
1 stop11h 53m
San Juan Luis Munoz Marin Intl
Sun 8/16
2:20 pm-9:59 pm
1 stop10h 39m
$617
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 10/22
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Mon 10/26
2:46 pm-9:21 pm
1 stop9h 35m
$657
Showing 1-10 of 23 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 June is currently the most expensive (average of $419). 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 64 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 22, 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.
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Overall
7.9
Crew
8.6
Entertainment
7.5
Boarding
8.1
Food
7.0
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 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 22, 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 22, 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 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$176 | Average$513 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$292 | Average$552 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$318 | Average$529 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$360 | Average$590 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$419 | Average$562 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$561 | FlexibilityNo cancel fee | On-time62% |