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Puerto Rico

$144+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
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 April 15, 2025.

Round-trip from

$355
(Delta)

One-way from

$144
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$421
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 ($18 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 15, 2025.

This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1510:59 pmONT - SJU
1 stop9h 52mDelta
Fri 8/292:39 pmSJU - ONT
1 stop10h 50mDelta
Deal found 4/14$355
This American Airlines deal was found by Cheapflights users on 4/14. 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.
Wed 9/108:04 pmONT - SJU
2 stops17h 16mAmerican Airlines
Thu 9/188:30 amSJU - ONT
2 stops18h 06mAmerican Airlines
Deal found 4/14$405
This JetBlue deal was found by Cheapflights users on 4/15. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1210:59 pmONT - SJU
1 stop10h 35mJetBlue
Wed 5/1411:58 amSJU - ONT
1 stop12h 13mJetBlue
Deal found 4/15$407
This United deal was found by Cheapflights users on 4/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/55:05 amONT - SJU
1 stop9h 25mUnited Airlines
Wed 5/71:05 amSJU - ONT
2 stops16h 20mUnited Airlines
Deal found 4/14$445
This Southwest deal was found by Cheapflights users on 4/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/245:50 amONT - SJU
2 stops12h 50mSouthwest
Thu 5/295:35 amSJU - ONT
2 stops13h 35mSouthwest
Deal found 4/14$485
This United Airlines deal was found by Cheapflights users on 4/15. 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.
Wed 5/215:05 amONT - BQN
2 stops15h 04mUnited Airlines
Tue 5/2712:15 amBQN - ONT
2 stops15h 16mUnited Airlines
Deal found 4/15$900

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 April 15, 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

Fri 8/15

10:59 pm-11:51 am

1 stop9h 52m

San Juan Luis Munoz Marin Intl

Fri 8/29

2:39 pm-10:29 pm

1 stop10h 50m

$355

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 9/10

8:04 pm-4:20 pm

2 stops17h 16m

San Juan Luis Munoz Marin Intl

Thu 9/18

8:30 am-11:36 pm

2 stops18h 06m

$405

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 5/12

10:59 pm-12:34 pm

1 stop10h 35m

San Juan Luis Munoz Marin Intl

Wed 5/14

11:58 am-9:11 pm

1 stop12h 13m

$407

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 5/5

5:05 am-5:30 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Wed 5/7

1:05 am-2:25 pm

2 stops16h 20m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/24

5:50 am-9:40 pm

2 stops12h 50m

San Juan Luis Munoz Marin Intl

Thu 5/29

5:35 am-4:10 pm

2 stops13h 35m

$485

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 4/29

6:00 am-5:00 am

2 stops20h 00m

San Juan Luis Munoz Marin Intl

Fri 5/2

6:05 am-10:51 am

2 stops31h 46m

$795

OntarioAguadilla

ONT - BQN

ONTBQN

Ontario

Wed 5/21

5:05 am-11:09 pm

2 stops15h 04m

Aguadilla Borinquen

Tue 5/27

12:15 am-12:31 pm

2 stops15h 16m

$900

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/17

6:47 pm-12:44 pm

1 stop14h 57m

$144

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 5/12

10:59 pm-12:34 pm

1 stop10h 35m

$195

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 7/12

6:38 pm-12:34 pm

2 stops14h 56m

$243

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

Showing 1-10 of 14 results
1
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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, 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 December is currently the most expensive (average of $336). 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 April 15, 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.

Rainfall in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Puerto Rico ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit Puerto Rico when rainfall is around 2.2 in.

Temperature in Puerto Rico by month

Plan your trip to Puerto Rico by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Puerto Rico, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

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 April 15, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Ontario to Puerto Rico. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,876 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
9,876 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,917 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,658 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
JetBlue
7.3
Good
2,926 reviews
Alaska Airlines
8.0
Very good
9,876 reviews

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Boarding

8.2

Food

7.1

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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 $195 on JetBlue. Other airlines that offer cheap prices include United Airlines from $243 and Frontier from $245 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 December is currently the most expensive (average of $336). 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 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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$328FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$273Average$418FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$322Average$620FlexibilityNo cancel feeOn-time69%
DeltaCheapest$334Average$495FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$357Average$610FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$389Average$575FlexibilityNo cancel feeOn-time63%

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