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Puerto Rico

$192+ Cheap flights from Ontario (ONT) to Puerto Rico

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 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Aug 1 — Aug 81
Sat 8/1
Sat 8/8
1 adult, Economy
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Cheap flight deals from Ontario to Puerto Rico

Cheapest flights from Ontario to Puerto Rico
Explore the most affordable flight options available from Ontario to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 2, 2026.

This Delta deal was found by Cheapflights users on 7/1. 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.
Sun 11/85:52 pm
ONT
-
SJU
2 stops16h 08m
Delta
Wed 11/113:10 pm
SJU
-
ONT
2 stops12h 38m
Delta
Deal found 7/1$384
This American Airlines deal was found by Cheapflights users on 6/28. 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 10/3010:10 pm
ONT
-
SJU
1 stop10h 10m
American Airlines
Tue 11/36:44 am
SJU
-
ONT
1 stop11h 20m
American Airlines
Deal found 6/28$437
This Delta deal was found by Cheapflights users on 7/1. 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.
Fri 11/611:15 pm
ONT
-
SJU
1 stop9h 21m
Delta
Thu 11/123:35 pm
SJU
-
ONT
1 stop10h 39m
Delta
Deal found 7/1$442
This Southwest deal was found by Cheapflights users on 6/29. 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 8/2011:00 am
ONT
-
SJU
2 stops9h 50m
Southwest
Tue 8/255:15 am
SJU
-
ONT
2 stops11h 50m
Southwest
Deal found 6/29$460
This Southwest deal was found by Cheapflights users on 7/1. 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.
Sat 8/291:00 pm
ONT
-
SJU
2 stops17h 10m
Southwest
Mon 8/315:00 am
SJU
-
ONT
2 stops13h 15m
Southwest
Deal found 7/1$463
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 11/105:00 am
ONT
-
SJU
2 stops15h 36m
United Airlines
Wed 11/118:05 am
SJU
-
ONT
2 stops14h 24m
United Airlines
Deal found 7/1$479
This Southwest deal was found by Cheapflights users on 6/29. 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 11/68:45 pm
ONT
-
SJU
2 stops11h 55m
Southwest
Mon 11/165:45 am
SJU
-
ONT
2 stops11h 05m
Southwest
Deal found 6/29$480
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Sat 11/76:36 pm
ONT
-
SJU
2 stops16h 04m
United Airlines
Fri 11/138:05 am
SJU
-
ONT
2 stops14h 24m
United Airlines
Deal found 7/1$484
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/277:13 pm
ONT
-
SJU
2 stops16h 31m
United Airlines
Sun 8/302:20 pm
SJU
-
ONT
1 stop10h 39m
United Airlines
Deal found 7/1$489
This United Airlines deal was found by Cheapflights users on 6/29. 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 8/85:00 am
ONT
-
SJU
1 stop9h 38m
United Airlines
Wed 8/127:00 am
SJU
-
ONT
2 stops14h 16m
United Airlines
Deal found 6/29$490
This JetBlue deal was found by Cheapflights users on 6/30. 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 9/119:10 pm
ONT
-
SJU
1 stop13h 24m
JetBlue
Fri 9/1810:30 am
SJU
-
ONT
1 stop12h 43m
JetBlue
Deal found 6/30$491
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Tue 10/206:00 am
ONT
-
BQN
2 stops14h 09m
United Airlines
Mon 10/2612:09 am
BQN
-
ONT
2 stops15h 33m
United Airlines
Deal found 7/1$494

Find flight deals from Ontario to Puerto Rico

Keep the following information in mind while searching for Ontario to Puerto Rico flight deals. Data was last updated July 2, 2026.

Round-trip from

$384
(Delta)

One-way from

$192
(Delta)

Popular in

June

Cheapest in

October

Average price

$532
From Ontario to Puerto Rico
Search Deals
One-way flight from Ontario to Puerto Rico
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Puerto Rico 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 July 2, 2026.
Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 8/29

1:00 pm-9:10 am

2 stops17h 10m

San Juan Luis Munoz Marin Intl

Mon 8/31

5:00 am-3:15 pm

2 stops13h 15m

$463

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 11/6

8:45 pm-12:40 pm

2 stops11h 55m

San Juan Luis Munoz Marin Intl

Mon 11/16

5:45 am-12:50 pm

2 stops11h 05m

$480

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 8/27

7:13 pm-3:42 pm

2 stops17h 29m

San Juan Luis Munoz Marin Intl

Tue 9/1

7:00 am-8:01 pm

2 stops16h 01m

$484

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 10/5

6:00 am-8:38 pm

1 stop11h 38m

San Juan Luis Munoz Marin Intl

Mon 10/12

2:00 pm-8:58 pm

1 stop9h 58m

$484

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 8/31

6:00 am-8:38 pm

1 stop11h 38m

San Juan Luis Munoz Marin Intl

Fri 9/4

3:56 pm-12:50 pm

2 stops23h 54m

$549

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 9/1

11:59 pm-3:59 pm

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Wed 9/30

10:30 am-8:13 pm

1 stop12h 43m

$550

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 9/16

5:00 am-8:38 pm

2 stops12h 38m

San Juan Luis Munoz Marin Intl

Tue 9/29

2:00 pm-8:58 pm

1 stop9h 58m

$610

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 11/3

6:00 am-9:24 pm

1 stop11h 24m

San Juan Luis Munoz Marin Intl

Fri 11/6

3:46 pm-9:50 pm

1 stop10h 04m

$615

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 8/7

5:45 am-8:38 pm

1 stop11h 53m

San Juan Luis Munoz Marin Intl

Mon 8/10

2:05 am-12:50 pm

2 stops13h 45m

$615

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 8/5

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

Wed 8/12

7:00 am-6:16 pm

2 stops14h 16m

$615

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 33 resultsSorted by cheapest first
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2
3
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Best time to book a flight from Ontario to Puerto Rico

Have a flexible travel schedule? Discover the best time to fly to Puerto Rico from Ontario 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 Ontario to Puerto Rico

What is the cheapest month to book a flight from Ontario to Puerto Rico?

Currently, November is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $120). Flying from Ontario to Puerto Rico 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 far ahead should I book a flight from Ontario to Puerto Rico?

The price you pay for your flight from Ontario to Puerto Rico may vary depending on when you book. For the best chance of a lower fare, look to book 63 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Reviews of airlines servicing Puerto Rico

Get insights into the airlines that provide service to Puerto Rico. 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 Puerto Rico. Reviews last updated July 2, 2026.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,249 reviews

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Southwest
7.9
Good
4,249 reviews
Southwest
7.9
Good
4,249 reviews

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Delta
7.8
Good
8,452 reviews
Southwest
7.9
Good
4,249 reviews

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
United Airlines
7.4
Good
9,926 reviews
Southwest
7.9
Good
4,249 reviews

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
American Airlines
7.1
Good
11,769 reviews
Southwest
7.9
Good
4,249 reviews

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.
Frontier
5.6
Fair
2,850 reviews
Southwest
7.9
Good
4,249 reviews

Crew

8.6

Entertainment

7.5

Overall

7.9

Boarding

8.1

Food

7.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

La Tracimeldamarcos,Jun 2026

LAX - SLC

The second flight was not as comfortable as the first as we had to change planes to what seemed to be a slightly older aircraft. The seats weren’t as comfortable as the other plane. But it wasn’t bad.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Puerto Rico. 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 from for flights from Ontario to Puerto Rico?

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Puerto Rico. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

  • How long is the flight from Ontario to Puerto Rico?

    Departing from Ontario to Puerto Rico will take you 17h 10m. There are 3334 mi between Ontario and Puerto Rico. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ontario to Puerto Rico one-way?

    One-way options have recently been found by users for as low as $142 on United Airlines. Other airlines that offer cheap prices include Delta from $168 and Southwest from $178 one-way.

  • Can I find deals for flights from Ontario to Puerto Rico that include hotel bookings?

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

  • How can I find direct flights from Ontario to Puerto Rico?

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

  • Can I find deals for business class flights from Ontario to Puerto Rico?

    Yes. Cheapflights offers flight deals from Ontario to Puerto Rico 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 Ontario to Puerto Rico?

    Currently, November is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $120). Flying from Ontario to Puerto Rico 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Ontario to Puerto Rico

Discover the top 6 airlines that operate flights from Ontario to Puerto Rico. 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 July 2, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$176Average$532FlexibilityNo cancel feeOn-time62%
DeltaCheapest$292Average$552FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$318Average$530FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$360Average$577FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$419Average$562FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$455Average$561FlexibilityNo cancel feeOn-time62%

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