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$183+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 June 30, 2025.

Round-trip from

$365
(Delta)

One-way from

$183
(Delta)

Popular in

December

Cheapest in

October

Average price

$484
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 ($59 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 30, 2025.

This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/277:05 amONT - SJU
1 stop12h 02mDelta
Sat 9/612:50 pmSJU - ONT
2 stops12h 50mDelta
Deal found 6/29$365
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/166:17 amONT - SJU
2 stops13h 39mAmerican Airlines
Fri 8/227:55 amSJU - ONT
1 stop16h 17mAmerican Airlines
Deal found 6/29$401
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 10/310:56 pmONT - SJU
1 stop11h 49mJetBlue
Tue 10/712:50 pmSJU - ONT
1 stop11h 39mJetBlue
Deal found 6/30$410
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.
Wed 10/155:05 amONT - SJU
1 stop9h 25mUnited Airlines
Wed 10/292:46 pmSJU - ONT
1 stop9h 49mUnited Airlines
Deal found 6/29$455
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 10/317:10 amONT - SJU
1 stop11h 25mSouthwest
Sun 11/96:10 amSJU - ONT
1 stop15h 05mSouthwest
Deal found 6/29$461
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.
Thu 9/46:50 pmONT - BQN
2 stops25h 19mUnited Airlines
Tue 9/912:15 amBQN - ONT
2 stops15h 17mUnited Airlines
Deal found 6/29$540

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 June 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

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 8/27

7:05 am-10:07 pm

1 stop12h 02m

San Juan Luis Munoz Marin Intl

Sat 9/6

12:50 pm-10:40 pm

2 stops12h 50m

$365

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 8/16

6:17 am-10:56 pm

2 stops13h 39m

San Juan Luis Munoz Marin Intl

Fri 8/22

7:55 am-9:12 pm

1 stop16h 17m

$401

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 10/3

10:56 pm-1:45 pm

1 stop11h 49m

San Juan Luis Munoz Marin Intl

Tue 10/7

12:50 pm-9:29 pm

1 stop11h 39m

$410

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 10/15

5:05 am-5:30 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Tue 10/21

2:00 pm-8:24 pm

1 stop9h 24m

$455

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 10/31

7:10 am-9:35 pm

1 stop11h 25m

San Juan Luis Munoz Marin Intl

Sun 11/9

6:10 am-5:15 pm

1 stop15h 05m

$461

OntarioAguadilla

ONT - BQN

ONTBQN

Ontario

Thu 9/4

6:50 pm-11:09 pm

2 stops25h 19m

Aguadilla Borinquen

Tue 9/9

12:15 am-12:32 pm

2 stops15h 17m

$540

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 8/31

7:05 am-10:07 pm

1 stop12h 02m

$183

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 10/2

12:19 pm-9:52 am

2 stops18h 33m

$184

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 8/1

8:09 pm-4:53 pm

1 stop17h 44m

$200

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 9/29

10:56 pm-12:40 pm

1 stop10h 44m

$205

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/28

Showing 1-10 of 13 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 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 June 30, 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 June 30, 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

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

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

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

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
4,278 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

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
7,973 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

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
8,852 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,920 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.1

Crew

8.5

Overall

8.0

Food

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 $183 on Delta. Other airlines that offer cheap prices include Frontier from $184 and JetBlue from $205 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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$383FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$353Average$608FlexibilityNo cancel feeOn-time71%
DeltaCheapest$355Average$534FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$366Average$585FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$409Average$575FlexibilityNo cancel feeOn-time63%

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