$175+ Cheap flights from San Juan to Ontario (ONT)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Oct 19 — Oct 261
Round-trip
1 adult, Economy
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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 San Juan to Ontario
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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 September 19, 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 September 19, 2026.
This Mytrip deal was found by Cheapflights users on 9/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/213:04 am -
2 stops19h 01m
Mon 10/268:35 pm -
2 stops16h 41m
Deal found 9/18![Frontier logo]()
$365
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops31h 01m
Mon 10/198:35 pm -
2 stops16h 51m
Deal found 9/17![Frontier logo]()
$420
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:51 pm -
2 stops23h 25m
Tue 11/35:07 pm -
2 stops13h 08m
Deal found 9/16![Frontier logo]()
$423
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:59 am -
2 stops18h 49m
Mon 10/268:35 pm -
2 stops16h 41m
Deal found 9/16![Frontier logo]()
$430
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1012:59 am -
2 stops19h 39m
Mon 11/162:23 pm -
2 stops20h 20m
Deal found 9/17![Frontier logo]()
$434
This American Airlines deal was found by Cheapflights users on 9/18. 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.
Fri 11/67:05 am -
1 stop19h 56m
Mon 11/911:59 pm -
2 stops14h 06m
Deal found 9/18![American Airlines logo]()
$436
This American Airlines deal was found by Cheapflights users on 9/18. 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 10/136:30 am -
2 stops15h 13m
Tue 10/2010:10 pm -
1 stop10h 10m
Deal found 9/18![American Airlines logo]()
$454
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:51 pm -
2 stops28h 57m
Sun 10/188:03 pm -
2 stops24h 51m
Deal found 9/16![Frontier logo]()
$458
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 September 19, 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 September 19, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:55 pm -
1 stop10h 04m
Sun 11/16:00 am -
1 stop11h 24m
Deal found 9/16![United Airlines logo]()
$526
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:40 am -
2 stops14h 21m
Thu 10/296:00 am -
1 stop11h 24m
Deal found 9/16![United Airlines logo]()
$526
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/142:00 pm -
1 stop9h 58m
Sun 10/185:00 am -
1 stop9h 38m
Deal found 9/14![United Airlines logo]()
$544
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:00 pm -
1 stop9h 58m
Mon 10/195:00 am -
1 stop9h 38m
Deal found 9/14![United Airlines logo]()
$544
This United Airlines deal was found by Cheapflights users on 9/18. 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 10/152:00 pm -
1 stop9h 58m
Sat 10/175:00 am -
1 stop9h 38m
Deal found 9/18![United Airlines logo]()
$554
This United Airlines deal was found by Cheapflights users on 9/18. 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 10/222:00 pm -
1 stop9h 58m
Mon 10/266:00 am -
1 stop11h 24m
Deal found 9/18![United Airlines logo]()
$554
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/152:00 pm -
1 stop9h 58m
Wed 10/286:00 am -
1 stop11h 24m
Deal found 9/19![United Airlines logo]()
$554
This United Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/12:21 pm -
1 stop10h 30m
Sat 11/145:00 am -
2 stops12h 24m
Deal found 9/14![United Airlines logo]()
$584
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/242:21 pm -
1 stop10h 30m
Tue 12/15:00 am -
1 stop9h 25m
Deal found 9/16![United Airlines logo]()
$633
Last-minute flights from San Juan to OntarioDiscover last-minute flight deals from San Juan to Ontario. Data last updated September 19, 2026 and is based on user searches.
Discover last-minute flight deals from San Juan to Ontario. Data last updated September 19, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 9/18. 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 10/136:30 am -
2 stops15h 13m
Tue 10/2010:10 pm -
1 stop10h 10m
Deal found 9/18![American Airlines logo]()
$454
This Mytrip deal was found by Cheapflights users on 9/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:59 am -
2 stops21h 06m
Sat 10/175:25 pm -
2 stops18h 54m
Deal found 9/18![Frontier logo]()
$519
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/152:00 pm -
1 stop9h 58m
Mon 10/195:00 am -
1 stop9h 38m
Deal found 9/15![United Airlines logo]()
$526
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/162:51 pm -
2 stops28h 57m
Sun 10/188:03 pm -
2 stops24h 51m
Deal found 9/16![Frontier logo]()
$458
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:15 am -
2 stops31h 01m
Mon 10/198:35 pm -
2 stops16h 51m
Deal found 9/17![Frontier logo]()
$420
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2012:59 am -
2 stops18h 49m
Mon 10/268:35 pm -
2 stops16h 41m
Deal found 9/16![Frontier logo]()
$430
This Mytrip deal was found by Cheapflights users on 9/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/213:04 am -
2 stops19h 01m
Mon 10/268:35 pm -
2 stops16h 41m
Deal found 9/18![Frontier logo]()
$365
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:51 pm -
2 stops23h 25m
Tue 11/35:07 pm -
2 stops13h 08m
Deal found 9/16![Frontier logo]()
$423
This Mytrip deal was found by Cheapflights users on 9/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:52 pm -
2 stops20h 43m
Wed 10/285:07 pm -
2 stops13h 08m
Deal found 9/19![Frontier logo]()
$518
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 September 19, 2026.
Search for one-way flight options from San Juan to Ontario. Find affordable one-way fares based on user searches. Data last updated September 19, 2026.
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/222:51 pm -
2 stops23h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/235:11 pm -
2 stops26h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Frontier logo]()
$183
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/2412:21 pm -
2 stops14h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![American Airlines logo]()
$218
This Frontier deal was found by Cheapflights users on 9/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/247:58 pm -
1 stop14h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/18![Frontier logo]()
$222
This Delta deal was found by Cheapflights users on 9/17. 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 10/232:59 pm -
1 stop9h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Delta logo]()
$227
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/124:52 pm -
2 stops21h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$230
This Mytrip deal was found by Cheapflights users on 9/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/203:00 am -
2 stops16h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/17![Frontier logo]()
$234
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/212:55 pm -
1 stop10h 04m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![United Airlines logo]()
$263
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:40 am -
2 stops16h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$272
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/92:51 pm -
2 stops21h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![Frontier logo]()
$277
This American Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/206:00 am -
1 stop10h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![American Airlines logo]()
$278
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 September 19, 2026.
Round-trip from | $365 (Mytrip) |
|---|---|
One-way from | $175 (Mytrip) |
Popular in | July |
Cheapest in | January |
Average price | $440 |
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 7,457,451 searches. Data last updated September 19, 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 San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Tue 11/24
7:58 pm-6:20 am
1 stop14h 22m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$222
Quickest round-trip
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Fri 10/23
2:59 pm-9:54 pm
1 stop9h 55m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$227
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Fri 10/23
1:00 am-3:22 pm
2 stops17h 22m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$263
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Wed 10/21
2:00 pm-8:58 pm
1 stop9h 58m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$268
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Fri 10/30
6:40 am-8:15 pm
2 stops16h 35m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$272
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Thu 10/22
2:00 pm-8:58 pm
1 stop9h 58m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$272
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Sat 10/3
3:35 pm-10:37 pm
1 stop10h 02m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$345
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Fri 10/23
1:25 pm-9:59 pm
3 stops35h 34m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$363
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Sun 11/8
2:21 pm-8:51 pm
1 stop10h 30m
Ontario
Wed 12/31
12:00 am-4:00 am
Nonstop0h 00m
$370
San JuanOntario
SJU San Juan Luis Munoz Marin Intl - ONT Ontario
SJUONT
San Juan Luis Munoz Marin Intl
Wed 10/21
2:55 pm-9:59 pm
1 stop10h 04m
Ontario
Sun 11/1
6:00 am-9:24 pm
1 stop11h 24m
$526
Showing 1-10 of 18 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, January is the cheapest month in which you can book a flight from San Juan to Ontario (average of $288). Flying from San Juan to Ontario in July is currently the most expensive (average of $1,150). 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?
Airfare is below average for this route at the moment.
San Juan to Ontario flights typically cost between $480 and $658 in October.The cheapest round-trip price found within the last 5 days was $365 on Frontier (Oct 21-Oct 26).
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 17 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 September 19, 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
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Entertainment
7.5
Crew
8.6
Food
7.0
Comfort
8.0
Overall
8.0
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.
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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 September 19, 2026.
San Juan and Ontario flights
Browse other San Juan and Ontario flight options. Last updated on September 19, 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 7,457,451 searches. Data last updated September 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$367 | Average$629 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$389 | Average$435 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$461 | Average$665 | FlexibilityNo cancel fee | On-time71% |