Ontario

$192+ Cheap flights from San Juan to Ontario (ONT)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Jul 24 — Jul 311
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Cheap flight deals from San Juan to Ontario

Cheapest flights from San Juan to Ontario
Explore the most affordable flight options available from San Juan to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 24, 2026.

This Delta deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/252:59 pm
SJU
-
ONT
1 stop10h 27m
Delta
Wed 9/306:00 pm
ONT
-
SJU
2 stops15h 03m
Delta
Deal found 6/24$384
This American Airlines deal was found by Cheapflights users on 6/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/288:35 am
SJU
-
ONT
1 stop14h 29m
American Airlines
Sat 10/317:20 am
ONT
-
SJU
1 stop13h 13m
American Airlines
Deal found 6/19$393
This American Airlines deal was found by Cheapflights users on 6/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/256:27 am
SJU
-
ONT
2 stops19h 10m
American Airlines
Wed 9/3012:37 pm
ONT
-
SJU
2 stops17h 47m
American Airlines
Deal found 6/24$396
This American Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:30 am
SJU
-
ONT
2 stops13h 45m
American Airlines
Mon 8/314:07 pm
ONT
-
SJU
2 stops17h 33m
American Airlines
Deal found 6/23$437
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/121:00 am
SJU
-
ONT
2 stops14h 50m
United Airlines
Thu 9/177:13 pm
ONT
-
SJU
2 stops14h 41m
United Airlines
Deal found 6/23$442
This United Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:00 am
SJU
-
ONT
2 stops16h 01m
United Airlines
Sat 9/265:00 am
ONT
-
SJU
1 stop9h 38m
United Airlines
Deal found 6/22$474
This United Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/292:00 pm
SJU
-
ONT
1 stop9h 53m
United Airlines
Sun 9/66:00 am
ONT
-
SJU
1 stop11h 38m
United Airlines
Deal found 6/23$479
This Southwest deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/135:00 am
SJU
-
ONT
2 stops12h 00m
Southwest
Thu 9/1711:00 am
ONT
-
SJU
2 stops9h 50m
Southwest
Deal found 6/23$490
This JetBlue deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:50 am
SJU
-
ONT
1 stop13h 48m
JetBlue
Mon 8/3111:59 pm
ONT
-
SJU
1 stop13h 00m
JetBlue
Deal found 6/22$491
This American Airlines deal was found by Cheapflights users on 6/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/283:44 pm
SJU
-
ONT
2 stops23h 19m
American Airlines
Sun 9/68:01 pm
ONT
-
SJU
2 stops24h 58m
American Airlines
Deal found 6/23$500
This American Airlines deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/76:44 am
SJU
-
ONT
1 stop15h 38m
American Airlines
Mon 11/2310:34 pm
ONT
-
SJU
1 stop18h 58m
American Airlines
Deal found 6/22$504

Find flight deals from San Juan to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from San Juan (PR1) to Ontario (ONT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 24, 2026.

Round-trip from

$384
(Delta)

One-way from

$192
(Delta)

Popular in

March

Cheapest in

January

Average price

$537
From San Juan to Ontario
One-way flight from San Juan to Ontario
Highest demand for flights based on searches. 16% potential increase in price ($96 potential increase over avg. RT price).
Cheapest flight prices on average. 8% potential price decrease ($37 potential savings vs. average RT price).
Average for round-trip flights in June 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Juan to Ontario that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 24, 2026.
Use the filters below to find and compare flights from San Juan to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/28

7:30 am-10:43 pm

2 stops18h 13m

Ontario

Sat 10/31

5:50 pm-12:36 pm

2 stops15h 46m

$384

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/28

8:35 am-8:04 pm

1 stop14h 29m

Ontario

Sat 10/31

8:00 pm-1:04 pm

2 stops14h 04m

$393

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 9/16

1:45 pm-10:05 pm

2 stops11h 20m

Ontario

Sat 9/19

3:15 pm-10:45 am

2 stops16h 30m

$442

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 9/16

7:00 am-8:01 pm

2 stops16h 01m

Ontario

Sat 9/19

5:00 am-5:38 pm

1 stop9h 38m

$474

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/21

2:55 pm-9:59 pm

1 stop10h 04m

Ontario

Sun 11/1

5:00 am-6:25 pm

1 stop9h 25m

$474

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 9/23

7:00 am-8:01 pm

2 stops16h 01m

Ontario

Sat 9/26

5:00 am-5:38 pm

1 stop9h 38m

$474

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 9/5

7:00 am-8:01 pm

2 stops16h 01m

Ontario

Sun 9/6

6:00 am-8:38 pm

1 stop11h 38m

$474
Quickest round-trip

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 10/24

2:00 pm-8:58 pm

1 stop9h 58m

Ontario

Sun 11/1

5:00 am-6:25 pm

1 stop9h 25m

$479

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Mon 8/24

7:00 am-6:11 pm

2 stops14h 11m

Ontario

Sun 8/30

7:13 pm-3:42 pm

2 stops17h 29m

$537
Cheapest one-way
Quickest one-way

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 9/5

2:00 pm-8:53 pm

1 stop9h 53m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

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.
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

What is the cheapest month to book a flight from San Juan to Ontario?

Currently, May is the cheapest month in which you can book a flight from San Juan to Ontario (average of $267). Flying from San Juan to Ontario in March is currently the most expensive (average of $556). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from San Juan to Ontario?

How far ahead should I book a flight from San Juan to Ontario?

The best time to book flights from San Juan to Ontario is 22 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Ontario. Reviews last updated June 24, 2026.
Read through reviews of airlines operating flights from San Juan to Ontario, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.1

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Boarding

8.1

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Boarding

8.1

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

Boarding

8.1

Comfort

8.0

Overall

7.9

Entertainment

7.5

Food

7.0

Crew

8.6

Reviews

1 / 20
10.0
Excellent

Walter,May 2026

LAS - BUR

Short but excellent flight. Everyone was friendly and professional it was a great flight!

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.
  • What airport do you fly into for flights to Ontario from San Juan?

    Ontario (ONT), located 3.1 mi from the city center, is the airport you fly into when you book flights from San Juan to Ontario. 3 airlines have flights to Ontario from San Juan on a regular basis. Booking flights from San Juan to Ontario should not be difficult; the airport handles an average of 0 inbound flights from San Juan per day.

  • How long is the flight from San Juan to Ontario?

    A quick flight from San Juan to Ontario can take about 12h 28m. Delta provides one of the quickest options available for as low as $384. The distance from San Juan to Ontario is about 3334 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from San Juan to Ontario round-trip?

    Flying on American Airlines is currently your cheapest option to Ontario, with prices starting at $365. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $367 and $389, respectively. You may be able to fly from San Juan to Ontario for 24% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from San Juan to Ontario one-way?

    One-way options have recently been found by users for as low as $176 on JetBlue. Other airlines that offer cheap prices include American Airlines from $178 and Southwest from $192 one-way.

  • Can I find deals for flights from San Juan to Ontario that include hotel bookings?

    Yes. In addition to deals on San Juan to Ontario flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from San Juan to Ontario?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Juan to Ontario.

  • Can I find deals for business class flights from San Juan to Ontario?

    Yes. Cheapflights offers flight deals from San Juan to Ontario by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Juan to Ontario?

    Currently, May is the cheapest month in which you can book a flight from San Juan to Ontario (average of $267). Flying from San Juan to Ontario in March is currently the most expensive (average of $556). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 3 airlines flying from San Juan to Ontario

Discover the top 3 airlines that operate flights from San Juan to Ontario. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$365Average$600FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$367Average$520FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$389Average$570FlexibilityNo cancel feeOn-time63%

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