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Ontario

$111+ Cheap flights from Puerto Rico to Ontario (ONT)

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Apr 24 — May 11
Fri 4/24
Fri 5/1
1 adult, Economy
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Cheap flight deals from Puerto Rico to Ontario

Cheapest flights from Puerto Rico to Ontario
Explore the most affordable flight options available from Puerto Rico to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 25, 2026.

This American Airlines deal was found by Cheapflights users on 3/22. 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.
Tue 8/256:00 am
SJU
-
ONT
2 stops15h 57m
American Airlines
Sat 8/2911:59 pm
ONT
-
SJU
2 stops15h 16m
American Airlines
Deal found 3/22$354
This Kiwi.com deal was found by Cheapflights users on 3/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/86:30 am
SJU
-
ONT
2 stops30h 35m
Multiple Airlines
Tue 5/128:30 am
ONT
-
SJU
1 stop11h 40m
Multiple Airlines
Deal found 3/24$414
This United Airlines deal was found by Cheapflights users on 3/23. 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 9/232:20 pm
SJU
-
ONT
1 stop10h 39m
United Airlines
Sun 9/275:00 am
ONT
-
SJU
1 stop9h 30m
United Airlines
Deal found 3/23$444
This JetBlue deal was found by Cheapflights users on 3/20. 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.
Tue 9/221:25 pm
SJU
-
ONT
1 stop11h 04m
JetBlue
Thu 10/110:56 pm
ONT
-
SJU
1 stop10h 46m
JetBlue
Deal found 3/20$451
This Expedia deal was found by Cheapflights users on 3/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:25 am
SJU
-
ONT
1 stop13h 39m
Multiple Airlines
Fri 6/510:41 pm
ONT
-
SJU
1 stop13h 53m
Multiple Airlines
Deal found 3/23$452
This Priceline deal was found by Cheapflights users on 3/23. 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.
Thu 9/36:25 am
SJU
-
ONT
1 stop13h 23m
Multiple Airlines
Sat 9/1210:56 pm
ONT
-
SJU
1 stop10h 46m
Multiple Airlines
Deal found 3/23$453
This Kiwi.com deal was found by Cheapflights users on 3/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2012:00 pm
SJU
-
ONT
1 stop10h 11m
Multiple Airlines
Wed 6/36:00 am
ONT
-
SJU
2 stops43h 01m
Multiple Airlines
Deal found 3/20$455
This United Airlines deal was found by Cheapflights users on 3/24. 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.
Fri 10/232:55 pm
SJU
-
ONT
1 stop9h 26m
United Airlines
Sat 11/75:00 am
ONT
-
SJU
1 stop9h 25m
United Airlines
Deal found 3/24$478
This United Airlines deal was found by Cheapflights users on 3/22. 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 8/252:20 pm
SJU
-
ONT
1 stop10h 39m
United Airlines
Sat 8/295:00 am
ONT
-
SJU
1 stop9h 38m
United Airlines
Deal found 3/22$481
This CheapOair deal was found by Cheapflights users on 3/24. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:25 am
SJU
-
ONT
1 stop13h 23m
Multiple Airlines
Mon 8/3111:59 pm
ONT
-
SJU
1 stop21h 11m
Multiple Airlines
Deal found 3/24$499
This Kiwi.com deal was found by Cheapflights users on 3/24. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1212:00 pm
SJU
-
ONT
1 stop10h 11m
Multiple Airlines
Fri 5/298:06 pm
ONT
-
SJU
2 stops43h 15m
Multiple Airlines
Deal found 3/24$503

Find flight deals from Puerto Rico to Ontario

Keep the following information in mind while searching for Puerto Rico to Ontario flight deals. Data was last updated March 25, 2026.

Round-trip from

$354
(American Airlines)

One-way from

$123
(Frontier)

Popular in

January

Cheapest in

October

Average price

$391
From Puerto Rico to Ontario
Search Deals
One-way flight from Puerto Rico to Ontario
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Puerto Rico to Ontario 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 March 25, 2026.
Use the filters below to find and compare flights from Puerto Rico to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sun 6/14

5:20 am-3:55 pm

1 stop13h 35m

Ontario

Tue 6/30

9:55 am-12:15 am

2 stops11h 20m

$570

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 5/8

3:56 pm-6:01 pm

1 stop29h 05m

Ontario

Mon 5/11

5:00 am-5:38 pm

1 stop9h 38m

$594
Quickest round-trip

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 4/14

2:55 pm-9:50 pm

1 stop9h 55m

Ontario

Sat 4/18

7:00 am-8:34 pm

1 stop10h 34m

$595

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 6/13

5:00 am-7:15 pm

1 stop17h 15m

Ontario

Tue 6/30

1:05 pm-12:45 am

1 stop8h 40m

$625

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 4/8

7:00 am-5:47 pm

2 stops13h 47m

Ontario

Sun 4/12

5:10 am-5:38 pm

1 stop9h 28m

$653

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 5/8

2:55 pm-9:58 pm

1 stop10h 03m

Ontario

Tue 5/12

7:00 am-8:34 pm

1 stop10h 34m

$665

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sun 5/17

11:59 pm-10:09 am

1 stop13h 10m

Ontario

Sat 5/30

1:10 pm-4:25 am

2 stops12h 15m

$730

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 4/11

1:40 pm-12:38 pm

1 stop25h 58m

Ontario

Tue 4/21

6:05 am-8:38 pm

1 stop11h 33m

$745

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 4/14

2:55 pm-9:50 pm

1 stop9h 55m

Ontario

Thu 4/16

7:00 am-8:34 pm

1 stop10h 34m

$746

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 4/14

2:55 pm-9:50 pm

1 stop9h 55m

Ontario

Fri 4/24

6:05 am-8:38 pm

1 stop11h 33m

$816

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Puerto Rico to Ontario

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

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

Currently, October is the cheapest month in which you can book a flight from Puerto Rico to Ontario (average of $175). Flying from Puerto Rico to Ontario in February is currently the most expensive (average of $295). 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.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated March 25, 2026.
Read through reviews of airlines operating flights from Puerto Rico to Ontario, such as Southwest,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,332 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,332 reviews
Southwest
8.0
Very good
4,332 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,478 reviews
Southwest
8.0
Very good
4,332 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,492 reviews
Southwest
8.0
Very good
4,332 reviews

Comfort

8.0

Boarding

8.1

Entertainment

7.5

Food

7.0

Overall

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

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

    For a flight from Puerto Rico to Ontario, you will be flying into Ontario. Ontario (ONT) is just 3.1 mi from the center of the city.

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

    A quick flight from Puerto Rico to Ontario can take about 13h 35m. Southwest provides one of the quickest options available for as low as $570. The distance between Puerto Rico and Ontario is about 3334 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airlines for a one-way flight from Puerto Rico to Ontario are JetBlue ($171), American Airlines ($178), and Southwest ($192).

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Puerto Rico to Ontario (average of $175). Flying from Puerto Rico to Ontario in February is currently the most expensive (average of $295). 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 3 airlines flying from Puerto Rico to Ontario

Discover the top 3 airlines that operate flights from Puerto Rico to Ontario. 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 March 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$365Average$746FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$367Average$520FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$389Average$430FlexibilityNo cancel feeOn-time63%

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