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$168+ 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$334
(Delta)

One-way from

$168
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$532
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. 11% potential increase in price ($62 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 29, 2025.

This Delta deal was found by Cheapflights users on 7/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:05 amONT - SJU
1 stop11h 55mDelta
Wed 10/82:29 pmSJU - ONT
1 stop10h 43mDelta
Deal found 7/29$334
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:50 pmONT - SJU
2 stops14h 10mUnited Airlines
Mon 9/291:05 amSJU - ONT
2 stops16h 57mUnited Airlines
Deal found 7/28$335
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2011:59 pmONT - SJU
1 stop11h 26mAmerican Airlines
Sat 10/255:25 amSJU - ONT
2 stops16h 10mAmerican Airlines
Deal found 7/27$386
This Frontier deal was found by Cheapflights users on 7/28. 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.
Wed 8/612:59 amONT - SJU
2 stops19h 27mFrontier
Thu 8/1412:59 amSJU - ONT
2 stops13h 54mFrontier
Deal found 7/28$392
This Priceline deal was found by Cheapflights users on 7/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1410:56 pmONT - SJU
1 stop10h 46mJetBlue
Fri 9/191:30 pmSJU - ONT
1 stop10h 59mJetBlue
Deal found 7/27$410
This Priceline deal was found by Cheapflights users on 7/28. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1611:59 pmONT - BQN
1 stop24h 04mJetBlue
Sat 8/239:35 amBQN - ONT
1 stop15h 24mJetBlue
Deal found 7/28$774
This United Airlines deal was found by Cheapflights users on 7/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:00 amONT - BQN
2 stops14h 09mUnited Airlines
Fri 8/2212:15 amBQN - ONT
2 stops14h 58mUnited Airlines
Deal found 7/28$815

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 29, 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

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 9/27

7:05 am-10:00 pm

1 stop11h 55m

San Juan Luis Munoz Marin Intl

Wed 10/8

2:29 pm-10:12 pm

1 stop10h 43m

$334

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 9/23

6:50 pm-12:00 pm

2 stops14h 10m

San Juan Luis Munoz Marin Intl

Mon 9/29

1:05 am-3:02 pm

2 stops16h 57m

$335

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 10/20

11:59 pm-2:25 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Sat 10/25

5:25 am-6:35 pm

2 stops16h 10m

$386

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 9/14

10:56 pm-12:42 pm

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Fri 9/19

1:30 pm-9:29 pm

1 stop10h 59m

$410

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 8/8

5:21 pm-10:13 am

2 stops13h 52m

San Juan Luis Munoz Marin Intl

Wed 8/13

9:30 am-11:50 pm

2 stops17h 20m

$462

OntarioAguadilla

ONT - BQN

ONTBQN

Ontario

Sat 8/16

11:59 pm-3:03 am

1 stop24h 04m

Aguadilla Borinquen

Sat 8/23

9:35 am-9:59 pm

1 stop15h 24m

$774

OntarioAguadilla

ONT - BQN

ONTBQN

Ontario

Sat 8/16

6:00 am-11:09 pm

2 stops14h 09m

Aguadilla Borinquen

Fri 8/22

12:15 am-12:13 pm

2 stops14h 58m

$815

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 9/6

2:54 pm-12:50 pm

2 stops18h 56m

$168

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 9/26

10:56 pm-1:47 pm

1 stop11h 51m

$187

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 8/26

6:04 am-8:38 pm

1 stop11h 34m

$213

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 14 results
1
2

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, September is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $254). Flying from Ontario to Puerto Rico in June is currently the most expensive (average of $339). 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 July 29, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Puerto Rico as you normally would.

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 29, 2025.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Alaska Airlines, Southwest, and Delta. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Comfort

7.8

Food

7.1

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • 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 $168 on American Airlines. Other airlines that offer cheap prices include JetBlue from $187 and United Airlines from $213 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, September is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $254). Flying from Ontario to Puerto Rico in June is currently the most expensive (average of $339). 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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Alternative routes for Ontario to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$393FlexibilityNo cancel feeOn-time62%
DeltaCheapest$355Average$535FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$363Average$608FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$366Average$603FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$409Average$571FlexibilityNo cancel feeOn-time63%

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