HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ontario

$147+ 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 12/20. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Nov 30 — Dec 71
Sun 11/30
Sun 12/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Puerto Rico to Ontario with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 October 31, 2025.

Round-trip from

$302
(Frontier)

One-way from

$147
(Frontier)

Popular in

July

Cheapest in

October

Average price

$361
From Puerto Rico to Ontario
Search Deals
One-way flight from Puerto Rico to Ontario
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find 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 October 31, 2025.

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 11/1310:39 pmSJU - ONT
2 stops18h 12mFrontier
Mon 11/177:44 pmONT - SJU
2 stops18h 10mFrontier
Deal found 10/29$303
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 12/297:06 pmSJU - ONT
1 stop16h 18mFrontier
Fri 1/95:13 pmONT - SJU
2 stops17h 48mFrontier
Deal found 10/28$311
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:06 pmSJU - ONT
1 stop17h 47mFrontier
Thu 1/14:16 pmONT - SJU
1 stop10h 18mFrontier
Deal found 10/30$364
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.
Sun 12/71:59 amSJU - ONT
2 stops18h 34mFrontier
Thu 12/112:59 pmONT - SJU
2 stops23h 24mFrontier
Deal found 10/30$368
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.
Sun 12/211:59 amSJU - ONT
2 stops19h 16mFrontier
Mon 1/125:13 pmONT - SJU
2 stops20h 45mFrontier
Deal found 10/29$385
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.
Sat 11/153:59 amSJU - ONT
2 stops18h 50mFrontier
Wed 11/198:00 amONT - SJU
2 stops21h 56mFrontier
Deal found 10/30$388
This Frontier deal was found by Cheapflights users on 10/31. 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 11/53:59 amSJU - ONT
2 stops12h 52mFrontier
Thu 11/203:31 pmONT - SJU
2 stops20h 24mFrontier
Deal found 10/31$401

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 October 31, 2025.
Use the filters below to find and compare flights from Puerto Rico to Ontario that are best for you.

Fly from

Puerto Rico

Fly to

Ontario

Route

Depart

Return

Price

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Mon 12/22

7:06 pm-7:24 am

1 stop16h 18m

Ontario

Mon 1/12

6:56 pm-5:58 pm

2 stops19h 02m

$303

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Mon 12/29

7:06 pm-7:24 am

1 stop16h 18m

Ontario

Fri 1/9

5:13 pm-3:01 pm

2 stops17h 48m

$311

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 11/15

3:59 am-6:49 pm

2 stops18h 50m

Ontario

Wed 11/19

8:00 am-9:56 am

2 stops21h 56m

$388

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 12/25

7:06 pm-7:19 am

1 stop16h 13m

Ontario

Thu 1/1

4:16 pm-6:34 am

1 stop10h 18m

$433

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 12/24

7:30 am-9:17 pm

2 stops17h 47m

Ontario

Thu 1/1

4:16 pm-6:34 am

1 stop10h 18m

$439

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sun 12/28

7:06 pm-7:24 am

1 stop16h 18m

Ontario

Sat 1/3

3:27 pm-6:34 am

1 stop11h 07m

$469

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Mon 11/24

3:59 am-2:26 pm

2 stops14h 27m

Ontario

Wed 11/26

7:06 pm-2:38 pm

2 stops15h 32m

$490

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 12/24

6:00 am-4:07 pm

2 stops14h 07m

Ontario

Thu 1/1

10:40 pm-11:39 am

1 stop8h 59m

$499

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 11/19

9:00 am-9:27 pm

2 stops16h 27m

$156

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 1/23

6:15 am-11:54 am

1 stop9h 39m

$178

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 17 results
1
2

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, February is the cheapest month in which you can book a flight from Puerto Rico to Ontario (average of $149). Flying from Puerto Rico to Ontario in July is currently the most expensive (average of $264). 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 PR to ONT?

Find hourly flight availability from Puerto Rico to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 31, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 45% on flights from Puerto Rico to Ontario by exploring options for tickets in the morning.

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 October 31, 2025.
Read through reviews of airlines operating flights from Puerto Rico to Ontario, such as Delta, United Airlines, and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,996 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,995 reviews
Delta
7.9
Good
7,996 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
11,031 reviews
Delta
7.9
Good
7,996 reviews

Entertainment

7.9

Boarding

8.2

Crew

8.5

Overall

7.9

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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 16h 18m. Frontier provides one of the quickest options available for as low as $303. The distance between Puerto Rico and Ontario is about 3334 mi.

  • 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, February is the cheapest month in which you can book a flight from Puerto Rico to Ontario (average of $149). Flying from Puerto Rico to Ontario in July is currently the most expensive (average of $264). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Puerto Rico to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
Luis Munoz Marin Intl to Las Vegas flights
Luis Munoz Marin Intl to Los Angeles flights
Santo Domingo to Las Vegas flights
Luis Munoz Marin Intl to San Diego flights
Santo Domingo to Los Angeles flights
Luis Munoz Marin Intl to Ontario flights
Luis Munoz Marin Intl to San Francisco flights
Nassau to Las Vegas flights
Port of Spain to Las Vegas flights
Luis Munoz Marin Intl to San Jose flights
Luis Munoz Marin Intl to Sacramento flights
Luis Munoz Marin Intl to Santa Ana flights
Luis Munoz Marin Intl to Reno flights
Port of Spain to Los Angeles flights
Simpson Bay to Los Angeles flights
Nassau to Los Angeles flights
Bridgetown to Los Angeles flights
Santiago de los Caballeros to Los Angeles flights
George Town to Los Angeles flights
Luis Munoz Marin Intl to Burbank flights
Simpson Bay to Las Vegas flights
Kingston to Los Angeles flights
Saint Thomas Island to Los Angeles flights
Santo Domingo to San Francisco flights
Saint Thomas Island to Las Vegas flights
Punta Cana to Los Angeles flights
Aguadilla to San Francisco flights
Port of Spain to San Francisco flights
Oranjestad to Las Vegas flights
George Town to Las Vegas flights
Aguadilla to Los Angeles flights
Punta Cana to Las Vegas flights
Montego Bay to Los Angeles flights
Saint Thomas Island to San Diego flights
Aguadilla to Las Vegas flights
Fort-de-France to Los Angeles flights
Puerto Plata to Los Angeles flights
Montego Bay to San Francisco flights
Fort-de-France to Las Vegas flights
Montego Bay to Las Vegas flights
Christiansted to Las Vegas flights
Basseterre to Los Angeles flights
Santo Domingo to San Diego flights
Bridgetown to Las Vegas flights
Kingston to Las Vegas flights
Santiago de los Caballeros to Ontario flights
Saint Thomas Island to Ontario flights
Nassau to San Diego flights

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 October 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$344Average$570FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$355Average$676FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$433Average$654FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.