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Ontario

$175+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Oct 14 — Oct 211
Tue 10/14
Tue 10/21
1 adult, Economy
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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 September 14, 2025.

Round-trip from

$333
(Frontier)

One-way from

$175
(Trip.com)

Popular in

December

Cheapest in

January

Average price

$408
From Puerto Rico to Ontario
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One-way flight from Puerto Rico to Ontario
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Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 14, 2025.

This Frontier deal was found by Cheapflights users on 9/14. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:22 amSJU - ONT
2 stops20h 28mFrontier
Wed 10/226:53 amONT - SJU
2 stops16h 37mFrontier
Deal found 9/14$333
This SmartFares deal was found by Cheapflights users on 9/13. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/221:25 pmSJU - ONT
1 stop11h 04mJetBlue
Fri 10/2410:56 pmONT - SJU
1 stop11h 49mJetBlue
Deal found 9/13$366
This Frontier deal was found by Cheapflights users on 9/12. 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 10/193:40 amSJU - ONT
2 stops15h 48mFrontier
Fri 10/245:15 pmONT - SJU
2 stops19h 09mFrontier
Deal found 9/12$373
This Frontier deal was found by Cheapflights users on 9/12. 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 10/44:42 pmSJU - ONT
2 stops17h 41mFrontier
Sat 10/188:34 amONT - SJU
2 stops14h 56mFrontier
Deal found 9/12$380
This Frontier deal was found by Cheapflights users on 9/11. 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 9/219:26 pmSJU - ONT
2 stops19h 34mFrontier
Fri 9/264:08 pmONT - SJU
2 stops19h 03mFrontier
Deal found 9/11$403
This Frontier deal was found by Cheapflights users on 9/13. 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 9/2712:28 amSJU - ONT
2 stops17h 56mFrontier
Thu 10/23:43 pmONT - SJU
2 stops20h 39mFrontier
Deal found 9/13$420
This Frontier deal was found by Cheapflights users on 9/11. 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.
Fri 10/176:22 amSJU - ONT
2 stops20h 28mFrontier
Wed 10/226:53 amONT - SJU
2 stops16h 37mFrontier
Deal found 9/11$424
This JetBlue deal was found by Cheapflights users on 9/14. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/41:29 pmSJU - ONT
1 stop11h 00mJetBlue
Sat 10/1810:56 pmONT - SJU
1 stop12h 58mJetBlue
Deal found 9/14$425
This CheapOair deal was found by Cheapflights users on 9/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/156:00 amSJU - ONT
1 stop18h 29mJetBlue
Wed 10/2210:56 pmONT - SJU
1 stop12h 58mJetBlue
Deal found 9/14$441
This SmartFares deal was found by Cheapflights users on 9/11. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/171:25 pmSJU - ONT
1 stop11h 04mJetBlue
Wed 10/2210:56 pmONT - SJU
1 stop12h 58mJetBlue
Deal found 9/11$445
This Priceline deal was found by Cheapflights users on 9/12. 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.
Fri 9/261:29 pmSJU - ONT
1 stop11h 00mJetBlue
Mon 9/2910:56 pmONT - SJU
1 stop10h 46mJetBlue
Deal found 9/12$451

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 September 14, 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

Wed 10/15

6:22 am-11:50 pm

2 stops20h 28m

Ontario

Wed 10/22

6:53 am-2:30 am

2 stops16h 37m

$333

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/22

1:25 pm-9:29 pm

1 stop11h 04m

Ontario

Fri 10/24

10:56 pm-1:45 pm

1 stop11h 49m

$366

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 10/4

1:29 pm-9:29 pm

1 stop11h 00m

Ontario

Sat 10/18

10:56 pm-2:54 pm

1 stop12h 58m

$425

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 10/11

1:25 pm-9:29 pm

1 stop11h 04m

Ontario

Sun 10/19

10:56 pm-2:54 pm

1 stop12h 58m

$463

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 10/23

2:00 pm-8:24 pm

1 stop9h 24m

Ontario

Wed 10/29

5:05 am-8:26 pm

2 stops12h 21m

$479

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 10/22

2:00 pm-8:24 pm

1 stop9h 24m

Ontario

Wed 10/29

5:05 am-8:26 pm

2 stops12h 21m

$479

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 10/4

2:55 pm-9:24 pm

1 stop9h 29m

Ontario

Sat 10/18

6:36 pm-12:00 pm

2 stops14h 24m

$480

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 10/17

1:25 pm-9:29 pm

1 stop11h 04m

Ontario

Tue 10/21

10:56 pm-2:54 pm

1 stop12h 58m

$482

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 12/24

8:30 am-9:07 pm

2 stops16h 37m

Ontario

Sat 1/3

5:05 am-12:36 am

2 stops15h 31m

$515

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 10/24

2:00 pm-8:24 pm

1 stop9h 24m

Ontario

Sun 10/26

5:05 am-5:25 pm

1 stop9h 20m

$520

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 21 results
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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, August is the cheapest month in which you can book a flight from Puerto Rico to Ontario (average of $246). Flying from Puerto Rico to Ontario in March is currently the most expensive (average of $328). 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 September 14, 2025.

When flying from Puerto Rico to Ontario, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 September 14, 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
8.0
Very good
7,956 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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
8.0
Very good
7,956 reviews
Delta
8.0
Very good
7,956 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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
8,931 reviews
Delta
8.0
Very good
7,956 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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
10,000 reviews
Delta
8.0
Very good
7,956 reviews

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Boarding

8.2

Food

7.3

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 11h 04m. Frontier provides one of the quickest options available for as low as $366. 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.

  • 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, August is the cheapest month in which you can book a flight from Puerto Rico to Ontario (average of $246). Flying from Puerto Rico to Ontario in March is currently the most expensive (average of $328). 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 Puerto Rico to Ontario

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$344Average$570FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$355Average$645FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$433Average$656FlexibilityNo cancel feeOn-time69%

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