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Puerto Rico

$178+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheap 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 October 30, 2025.

Round-trip from

$236
(Frontier)

One-way from

$178
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$371
From Ontario to Puerto Rico
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One-way flight from Ontario to Puerto Rico
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Highest demand for flights based on searches. 10% potential increase in price ($54 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Find 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 October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:20 pmONT - SJU
2 stops20h 14mFrontier
Sun 12/71:59 amSJU - ONT
2 stops18h 34mFrontier
Deal found 10/30$236
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:24 pmONT - SJU
2 stops18h 30mFrontier
Fri 11/143:59 amSJU - ONT
2 stops12h 38mFrontier
Deal found 10/30$282
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/203:31 pmONT - SJU
2 stops20h 24mFrontier
Sun 11/233:59 amSJU - ONT
2 stops14h 27mFrontier
Deal found 10/30$313
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/144:05 pmONT - BQN
2 stops19h 25mFrontier
Wed 11/193:55 amBQN - ONT
2 stops14h 31mFrontier
Deal found 10/30$314
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/203:31 pmONT - SJU
2 stops20h 24mFrontier
Sat 11/229:30 pmSJU - ONT
2 stops17h 58mFrontier
Deal found 10/29$328
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/85:18 pmONT - SJU
2 stops21h 05mFrontier
Sun 12/217:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 10/28$329
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:44 pmONT - SJU
2 stops18h 10mFrontier
Thu 11/203:59 amSJU - ONT
2 stops14h 27mFrontier
Deal found 10/28$336
This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/177:44 pmONT - SJU
2 stops18h 10mFrontier
Wed 12/33:55 amSJU - ONT
2 stops18h 40mFrontier
Deal found 10/28$338
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/107:24 pmONT - SJU
2 stops18h 30mFrontier
Thu 11/1310:39 pmSJU - ONT
2 stops18h 12mFrontier
Deal found 10/29$346
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/42:59 pmONT - SJU
2 stops23h 24mFrontier
Sat 12/63:55 amSJU - ONT
2 stops14h 09mFrontier
Deal found 10/30$347
This Frontier deal was found by Cheapflights users on 10/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1311:59 amONT - BQN
2 stops11h 05mFrontier
Sat 11/223:55 amBQN - ONT
2 stops21h 11mFrontier
Deal found 10/29$514
This Frontier deal was found by Cheapflights users on 10/27. 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 11/258:05 amONT - BQN
2 stops15h 05mFrontier
Sun 12/73:55 amBQN - ONT
2 stops14h 09mFrontier
Deal found 10/27$568

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 October 30, 2025.
Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.

Fly from

Ontario

Fly to

Puerto Rico

Route

Depart

Return

Price

OntarioAguadilla

ONT - BQN

ONTBQN

Ontario

Fri 11/14

4:05 pm-3:30 pm

2 stops19h 25m

Aguadilla Borinquen

Wed 11/19

3:55 am-2:26 pm

2 stops14h 31m

$314

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 1/16

7:55 pm-11:15 am

2 stops11h 20m

San Juan Luis Munoz Marin Intl

Tue 1/20

5:40 am-2:35 pm

2 stops12h 55m

$414

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 3/3

5:00 am-6:25 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Thu 3/5

2:25 pm-8:45 pm

1 stop10h 20m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 2/21

1:53 pm-6:11 am

2 stops12h 18m

San Juan Luis Munoz Marin Intl

Fri 2/27

2:05 am-5:41 pm

3 stops19h 36m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 11/18

7:00 am-12:36 am

2 stops13h 36m

San Juan Luis Munoz Marin Intl

Thu 12/4

2:25 pm-8:42 pm

1 stop10h 17m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 2/1

1:24 pm-6:11 am

2 stops12h 47m

San Juan Luis Munoz Marin Intl

Fri 2/27

2:05 am-5:41 pm

3 stops19h 36m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 11/16

10:25 pm-12:46 pm

1 stop10h 21m

San Juan Luis Munoz Marin Intl

Thu 12/4

3:32 pm-11:04 pm

1 stop11h 32m

$470

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 1/16

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Tue 1/20

3:46 pm-9:58 pm

1 stop10h 12m

$482

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 2/28

6:35 am-9:40 pm

2 stops11h 05m

San Juan Luis Munoz Marin Intl

Sat 3/21

5:00 am-3:55 pm

1 stop13h 55m

$495

OntarioAguadilla

ONT - BQN

ONTBQN

Ontario

Thu 11/13

11:59 am-3:04 am

2 stops11h 05m

Aguadilla Borinquen

Sat 11/22

3:55 am-9:06 pm

2 stops21h 11m

$514

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 30 results
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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, April is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $133). Flying from Ontario to Puerto Rico in November is currently the most expensive (average of $286). 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.

What is the cheapest time of day to fly from ONT to PR?

Find hourly flight availability from Ontario to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

One of the essential ways to save on airfare from Ontario to Puerto Rico is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

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 October 30, 2025.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
7,998 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,122 reviews
Southwest
8.0
Very good
4,243 reviews

Food

7.0

Crew

8.6

Comfort

8.0

Overall

8.0

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 9h 25m. There are 3334 mi between Ontario and Puerto Rico. This flight may include one or multiple stops.

  • 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, April is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $133). Flying from Ontario to Puerto Rico in November is currently the most expensive (average of $286). 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 5 airlines flying from Ontario to Puerto Rico

Discover the top 5 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$467FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$364Average$610FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$366Average$585FlexibilityNo cancel feeOn-time69%
DeltaCheapest$375Average$534FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$409Average$598FlexibilityNo cancel feeOn-time63%

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