$147+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Jun 5 — Jun 121
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to San Juan with Cheapflights
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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 May 6, 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 May 6, 2026.
This American Airlines deal was found by Cheapflights users on 5/2. 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 8/2511:59 pm
ONT
- SJU
1 stop11h 55m
American Airlines
Sat 8/296:00 am
SJU
- ONT
2 stops15h 58m
American Airlines
Deal found 5/2![American Airlines logo]()
$374
This United Airlines deal was found by Cheapflights users on 5/4. 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.
Fri 8/147:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Tue 8/182:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 5/4![United Airlines logo]()
$385
This American Airlines deal was found by Cheapflights users on 5/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1811:59 pm
ONT
- SJU
1 stop12h 03m
American Airlines
Mon 9/217:05 pm
SJU
- ONT
2 stops17h 24m
American Airlines
Deal found 5/5![American Airlines logo]()
$414
This Priceline deal was found by Cheapflights users on 5/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/2511:50 pm
ONT
- SJU
1 stop11h 08m
Multiple Airlines
Sat 8/296:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 5/2![Multiple Airlines logo]()
$418
This Priceline deal was found by Cheapflights users on 5/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2411:50 pm
ONT
- SJU
1 stop11h 08m
Multiple Airlines
Sat 8/296:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:10 pm
ONT
- SJU
2 stops17h 01m
Delta
Wed 8/52:05 pm
SJU
- ONT
2 stops12h 39m
Delta
Deal found 5/1![Delta logo]()
$430
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:00 am
ONT
- SJU
2 stops9h 50m
Southwest
Sun 9/205:00 am
SJU
- ONT
2 stops12h 00m
Southwest
Deal found 5/1![Southwest logo]()
$434
This American Airlines deal was found by Cheapflights users on 5/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/611:59 pm
ONT
- SJU
1 stop11h 55m
American Airlines
Sun 9/206:30 am
SJU
- ONT
2 stops19h 36m
American Airlines
Deal found 5/5![American Airlines logo]()
$454
This Kiwi.com deal was found by Cheapflights users on 5/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:47 pm
ONT
- SJU
1 stop31h 08m
Frontier
Tue 9/14:05 pm
SJU
- ONT
2 stops21h 00m
Frontier
Deal found 5/2![Frontier logo]()
$455
This Priceline deal was found by Cheapflights users on 5/3. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/1611:50 pm
ONT
- SJU
1 stop11h 07m
Multiple Airlines
Sat 8/226:25 am
SJU
- ONT
1 stop13h 23m
Multiple Airlines
Deal found 5/3![Multiple Airlines logo]()
$463
This United Airlines deal was found by Cheapflights users on 5/4. 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.
Wed 8/197:13 pm
ONT
- SJU
2 stops17h 29m
United Airlines
Tue 8/252:20 pm
SJU
- ONT
1 stop10h 39m
United Airlines
Deal found 5/4![United Airlines logo]()
$464
This Delta deal was found by Cheapflights users on 5/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/2310:00 pm
ONT
- SJU
1 stop12h 42m
Delta
Fri 8/282:59 pm
SJU
- ONT
1 stop9h 53m
Delta
Deal found 5/2![Delta logo]()
$465
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 May 6, 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 May 6, 2026.
This United Airlines deal was found by Cheapflights users on 5/2. 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.
Tue 8/45:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Tue 8/187:00 am
SJU
- ONT
2 stops14h 11m
United Airlines
Deal found 5/2![United Airlines logo]()
$534
This JetBlue deal was found by Cheapflights users on 5/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/311:54 pm
ONT
- SJU
1 stop13h 05m
JetBlue
Fri 7/1011:50 am
SJU
- ONT
1 stop13h 45m
JetBlue
Deal found 5/2![JetBlue logo]()
$550
This Southwest deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/218:40 pm
ONT
- SJU
2 stops11h 05m
Southwest
Sat 6/276:00 am
SJU
- ONT
2 stops13h 20m
Southwest
Deal found 5/1![Southwest logo]()
$600
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/305:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Wed 8/51:40 pm
SJU
- ONT
1 stop10h 02m
United Airlines
Deal found 5/1![United Airlines logo]()
$535
This Southwest deal was found by Cheapflights users on 5/5. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/169:55 pm
ONT
- SJU
1 stop11h 30m
Southwest
Sat 6/1312:25 pm
SJU
- ONT
2 stops13h 25m
Southwest
Deal found 5/5![Southwest logo]()
$643
This United Airlines deal was found by Cheapflights users on 5/4. 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.
Wed 5/135:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Wed 5/201:40 pm
SJU
- ONT
1 stop9h 56m
United Airlines
Deal found 5/4![United Airlines logo]()
$620
This JetBlue deal was found by Cheapflights users on 5/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/2410:41 pm
ONT
- SJU
1 stop11h 35m
JetBlue
Sat 5/309:52 am
SJU
- ONT
1 stop13h 55m
JetBlue
Deal found 5/2![JetBlue logo]()
$711
This Southwest deal was found by Cheapflights users on 5/4. 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 7/179:40 pm
ONT
- SJU
1 stop11h 55m
Southwest
Mon 7/2710:20 am
SJU
- ONT
1 stop15h 05m
Southwest
Deal found 5/4![Southwest logo]()
$665
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Sat 8/11:18 pm
ONT
- SJU
2 stops13h 11m
United Airlines
Fri 8/72:05 am
SJU
- ONT
2 stops13h 42m
United Airlines
Deal found 5/3![United Airlines logo]()
$671
This Southwest deal was found by Cheapflights users on 5/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/27:55 pm
ONT
- SJU
2 stops11h 40m
Southwest
Mon 6/810:20 am
SJU
- ONT
2 stops12h 45m
Southwest
Deal found 5/2![Southwest logo]()
$716
This United Airlines deal was found by Cheapflights users on 5/4. 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.
Fri 7/315:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Sun 8/21:40 pm
SJU
- ONT
1 stop10h 02m
United Airlines
Deal found 5/4![United Airlines logo]()
$721
Last-minute flights from Ontario to San JuanDiscover last-minute flight deals from Ontario to San Juan. Data last updated May 6, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to San Juan. Data last updated May 6, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/85:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Wed 5/132:55 pm
SJU
- ONT
1 stop10h 03m
United Airlines
Deal found 5/1![United Airlines logo]()
$570
This American Airlines deal was found by Cheapflights users on 5/2. 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 5/1610:26 pm
ONT
- SJU
1 stop19h 25m
American Airlines
Sat 6/137:00 am
SJU
- ONT
1 stop18h 36m
American Airlines
Deal found 5/2![American Airlines logo]()
$547
This Southwest deal was found by Cheapflights users on 5/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/173:50 pm
ONT
- SJU
2 stops14h 20m
Southwest
Thu 5/215:05 am
SJU
- ONT
2 stops12h 20m
Southwest
Deal found 5/2![Southwest logo]()
$490
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Sun 5/177:35 pm
ONT
- SJU
2 stops10h 38m
American Airlines
Thu 5/217:00 am
SJU
- ONT
1 stop18h 36m
American Airlines
Deal found 5/2![American Airlines logo]()
$552
This Delta deal was found by Cheapflights users on 5/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2910:00 pm
ONT
- SJU
1 stop11h 01m
Delta
Fri 6/52:48 pm
SJU
- ONT
1 stop10h 00m
Delta
Deal found 5/2![Delta logo]()
$472
This American Airlines deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/17:12 pm
ONT
- SJU
2 stops11h 27m
American Airlines
Thu 6/47:00 am
SJU
- ONT
1 stop18h 36m
American Airlines
Deal found 5/1![American Airlines logo]()
$534
This American Airlines deal was found by Cheapflights users on 5/3. 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 6/811:59 pm
ONT
- SJU
2 stops18h 59m
American Airlines
Wed 6/176:01 am
SJU
- ONT
2 stops20h 58m
American Airlines
Deal found 5/3![American Airlines logo]()
$486
This American Airlines deal was found by Cheapflights users on 5/3. 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 6/811:59 pm
ONT
- SJU
2 stops18h 59m
American Airlines
Tue 6/166:01 am
SJU
- ONT
2 stops19h 38m
American Airlines
Deal found 5/3![American Airlines logo]()
$530
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Wed 6/1011:59 pm
ONT
- SJU
2 stops18h 59m
American Airlines
Wed 6/176:01 am
SJU
- ONT
2 stops19h 38m
American Airlines
Deal found 5/3![American Airlines logo]()
$491
This American Airlines deal was found by Cheapflights users on 5/3. 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.
Wed 6/1011:59 pm
ONT
- SJU
2 stops18h 59m
American Airlines
Tue 6/166:01 am
SJU
- ONT
2 stops19h 38m
American Airlines
Deal found 5/3![American Airlines logo]()
$535
This Faresmojo deal was found by Cheapflights users on 5/2. 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 Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:05 am
ONT
- SJU
1 stop12h 24m
JetBlue
Mon 6/222:41 pm
SJU
- ONT
1 stop10h 07m
JetBlue
Deal found 5/2![JetBlue logo]()
$524
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 May 6, 2026.
Search for one-way flight options from Ontario to San Juan. Find affordable one-way fares based on user searches. Data last updated May 6, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/228:06 pm
ONT
- SJU
2 stops28h 55m
Frontier
Deal found 5/1![Frontier logo]()
$147
This Trip.com deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/106:00 am
ONT
- SJU
2 stops39h 37m
Frontier
Deal found 5/1![Frontier logo]()
$173
This American Airlines deal was found by Cheapflights users on 5/2. 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.
Mon 6/297:13 pm
ONT
- SJU
2 stops12h 49m
American Airlines
Deal found 5/2![American Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 5/4. 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.
Mon 6/16:00 am
ONT
- SJU
2 stops32h 12m
Frontier
Deal found 5/4![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 6/28:06 pm
ONT
- SJU
2 stops24h 53m
Frontier
Deal found 5/3![Frontier logo]()
$266
This American Airlines deal was found by Cheapflights users on 5/3. 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 7/611:59 pm
ONT
- SJU
1 stop18h 44m
American Airlines
Deal found 5/3![American Airlines logo]()
$267
This Delta deal was found by Cheapflights users on 5/4. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/1210:00 pm
ONT
- SJU
1 stop10h 46m
Delta
Deal found 5/4![Delta logo]()
$285
This United Airlines deal was found by Cheapflights users on 5/2. 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 5/185:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 5/2![United Airlines logo]()
$290
This United Airlines deal was found by Cheapflights users on 5/3. 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.
Tue 6/25:45 am
ONT
- SJU
1 stop11h 53m
United Airlines
Deal found 5/3![United Airlines logo]()
$297
This United Airlines deal was found by Cheapflights users on 5/4. 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.
Thu 7/305:00 am
ONT
- SJU
1 stop9h 38m
United Airlines
Deal found 5/4![United Airlines logo]()
$302
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 May 6, 2026.
Round-trip from | $374 (Delta) |
|---|---|
One-way from | $147 (Kiwi.com) |
Popular in | December |
Cheapest in | October |
Average price | $550 |
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 May 6, 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
Tue 8/4
5:45 am-8:38 pm
1 stop11h 53m
San Juan Luis Munoz Marin Intl
Tue 8/18
7:00 am-6:11 pm
2 stops14h 11m
$534
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Thu 7/30
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Wed 8/5
1:40 pm-8:42 pm
1 stop10h 02m
$535
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 7/3
11:54 pm-3:59 pm
1 stop13h 05m
San Juan Luis Munoz Marin Intl
Fri 7/10
11:50 am-10:35 pm
1 stop13h 45m
$550
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 6/21
8:40 pm-10:45 am
2 stops11h 05m
San Juan Luis Munoz Marin Intl
Sat 6/27
6:00 am-4:20 pm
2 stops13h 20m
$600
Quickest round-trip
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Wed 5/13
5:00 am-5:38 pm
1 stop9h 38m
San Juan Luis Munoz Marin Intl
Wed 5/20
1:40 pm-8:36 pm
1 stop9h 56m
$620
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 5/16
9:55 pm-12:25 pm
1 stop11h 30m
San Juan Luis Munoz Marin Intl
Sat 6/13
12:25 pm-10:50 pm
2 stops13h 25m
$643
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Fri 7/17
9:40 pm-12:35 pm
1 stop11h 55m
San Juan Luis Munoz Marin Intl
Mon 7/27
10:20 am-10:25 pm
1 stop15h 05m
$665
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sat 8/1
1:18 pm-5:29 am
2 stops13h 11m
San Juan Luis Munoz Marin Intl
Fri 8/7
2:05 am-12:47 pm
2 stops13h 42m
$671
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Sun 5/24
10:41 pm-1:16 pm
1 stop11h 35m
San Juan Luis Munoz Marin Intl
Sat 5/30
9:52 am-8:47 pm
1 stop13h 55m
$711
OntarioSan Juan
ONT - SJU
ONTSJU
Ontario
Tue 6/2
7:55 pm-10:35 am
2 stops11h 40m
San Juan Luis Munoz Marin Intl
Mon 6/8
10:20 am-8:05 pm
2 stops12h 45m
$716
Showing 1-10 of 21 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
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 14 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.
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 July is currently the most expensive (average of $427). 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?
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 May 6, 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.
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Crew
8.6
Comfort
8.0
Overall
7.9
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
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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Complete your trip
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Search flights from Ontario to San Juan by cabin class
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Ontario and San Juan flights
Browse other Ontario and San Juan flight options. Last updated on May 6, 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 May 6, 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 May 6, 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$321 | Average$553 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$360 | Average$577 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$419 | Average$555 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$455 | Average$561 | FlexibilityNo cancel fee | On-time62% |