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$142+ 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 1/27. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This Frontier deal was found by Cheapflights users on 12/17. 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 12/217:06 pmSJU - ONT
1 stop16h 18mFrontier
Tue 12/234:41 pmONT - SJU
1 stop9h 53mFrontier
Deal found 12/17$439
This Frontier deal was found by Cheapflights users on 12/17. 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 12/187:06 pmSJU - ONT
1 stop16h 13mFrontier
Sun 12/214:41 pmONT - SJU
1 stop9h 53mFrontier
Deal found 12/17$444
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/253:46 pmSJU - ONT
1 stop10h 06mUnited Airlines
Mon 1/126:39 pmONT - SJU
2 stops14h 16mUnited Airlines
Deal found 12/16$461
This Delta deal was found by Cheapflights users on 12/16. 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 12/241:07 pmSJU - ONT
2 stops13h 26mDelta
Thu 1/17:05 amONT - SJU
1 stop12h 15mDelta
Deal found 12/16$509
This United Airlines deal was found by Cheapflights users on 12/16. 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 12/232:25 pmSJU - ONT
1 stop10h 42mUnited Airlines
Mon 1/56:39 pmONT - SJU
2 stops14h 16mUnited Airlines
Deal found 12/16$519
This Frontier deal was found by Cheapflights users on 12/16. 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 12/257:06 pmSJU - ONT
1 stop16h 13mFrontier
Tue 12/304:41 pmONT - SJU
1 stop9h 53mFrontier
Deal found 12/16$552
This American Airlines deal was found by Cheapflights users on 12/17. 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 12/245:24 amSJU - ONT
2 stops14h 43mAmerican Airlines
Thu 1/16:20 amONT - SJU
2 stops11h 45mAmerican Airlines
Deal found 12/17$574
This American Airlines deal was found by Cheapflights users on 12/16. 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.
Thu 12/251:30 amSJU - ONT
2 stops14h 23mAmerican Airlines
Thu 1/16:10 amONT - SJU
1 stop13h 12mAmerican Airlines
Deal found 12/16$607

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 December 18, 2025.

Round-trip from

$256
(Kiwi.com)

One-way from

$142
(United Airlines)

Popular in

July

Cheapest in

October

Average price

$479
From Puerto Rico to Ontario
Search Deals
One-way flight from Puerto Rico to Ontario
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($37 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 December 2025
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 December 18, 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

Tue 1/13

3:54 pm-10:48 pm

1 stop10h 54m

Ontario

Sat 1/17

12:57 pm-10:48 am

2 stops17h 51m

$283

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 1/21

2:15 pm-9:05 pm

1 stop10h 50m

Ontario

Sun 2/1

10:30 pm-2:31 pm

1 stop12h 01m

$335

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 1/13

7:45 am-8:58 pm

2 stops17h 13m

Ontario

Sun 1/18

1:53 pm-6:11 am

2 stops12h 18m

$373

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 1/23

3:46 pm-9:58 pm

1 stop10h 12m

Ontario

Tue 2/3

6:00 am-12:36 am

2 stops14h 36m

$373

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 1/14

3:46 pm-9:58 pm

1 stop10h 12m

Ontario

Sun 1/18

6:00 am-9:26 pm

1 stop11h 26m

$373

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Fri 1/23

2:15 pm-9:05 pm

1 stop10h 50m

Ontario

Tue 2/3

10:30 pm-1:06 pm

1 stop10h 36m

$399

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 1/22

3:46 pm-9:58 pm

1 stop10h 12m

Ontario

Sat 1/31

6:00 am-9:26 pm

1 stop11h 26m

$430

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 1/29

3:46 pm-9:58 pm

1 stop10h 12m

Ontario

Sat 1/31

6:00 am-12:36 am

2 stops14h 36m

$430

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 1/27

7:45 am-5:43 pm

2 stops13h 58m

$142

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 2/26

6:00 am-11:59 pm

2 stops21h 59m

$145

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 19 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 November is currently the most expensive (average of $282). 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 December 18, 2025.

Unlike in the afternoon, 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 December 18, 2025.
Read through reviews of airlines operating flights from Puerto Rico to Ontario, such as United Airlines and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,091 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,091 reviews
United Airlines
7.4
Good
9,091 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
American Airlines
7.2
Good
11,054 reviews
United Airlines
7.4
Good
9,091 reviews

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

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 10h 50m. American Airlines provides one of the quickest options available for as low as $335. 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), Delta ($172), and American Airlines ($178).

  • 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 November is currently the most expensive (average of $282). 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 2 airlines flying from Puerto Rico to Ontario

Discover the top 2 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$355Average$600FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$367Average$520FlexibilityNo cancel feeOn-time69%

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