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Ontario

$158+ 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 3/16. Fares are subject to change and may not be available on all flights or dates of travel.
SJU — ONT
Mar 9 — Mar 161
Mon 3/9
Mon 3/16
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 February 7, 2026.

This American Airlines deal was found by Cheapflights users on 2/6. 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 3/58:40 am
SJU
-
ONT
1 stop16h 44m
American Airlines
Mon 3/911:59 pm
ONT
-
SJU
1 stop11h 04m
American Airlines
Deal found 2/6$290
This Southwest deal was found by Cheapflights users on 2/5. 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.
Thu 7/1610:20 am
SJU
-
ONT
1 stop15h 05m
Southwest
Tue 7/211:05 pm
ONT
-
SJU
1 stop8h 40m
Southwest
Deal found 2/5$419
This United Airlines deal was found by Cheapflights users on 2/5. 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 4/297:00 am
SJU
-
ONT
2 stops18h 45m
United Airlines
Wed 5/137:00 am
ONT
-
SJU
1 stop10h 34m
United Airlines
Deal found 2/5$431
This American Airlines deal was found by Cheapflights users on 2/4. 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 2/177:00 am
SJU
-
ONT
2 stops15h 42m
American Airlines
Sat 2/2110:37 pm
ONT
-
SJU
1 stop19h 12m
American Airlines
Deal found 2/4$441
This Southwest deal was found by Cheapflights users on 2/3. 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.
Wed 5/205:35 am
SJU
-
ONT
2 stops13h 45m
Southwest
Sun 5/249:55 pm
ONT
-
SJU
2 stops12h 15m
Southwest
Deal found 2/3$443
This Southwest deal was found by Cheapflights users on 2/5. 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.
Wed 6/311:25 am
SJU
-
ONT
2 stops13h 45m
Southwest
Mon 6/85:15 am
ONT
-
SJU
2 stops11h 10m
Southwest
Deal found 2/5$458
This American Airlines deal was found by Cheapflights users on 2/4. 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.
Mon 2/97:07 am
SJU
-
ONT
1 stop15h 38m
American Airlines
Thu 2/196:15 am
ONT
-
SJU
2 stops13h 19m
American Airlines
Deal found 2/4$465
This Faresmojo deal was found by Cheapflights users on 2/5. 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 Faresmojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/161:50 pm
SJU
-
ONT
1 stop11h 19m
JetBlue
Tue 7/2111:25 pm
ONT
-
SJU
1 stop11h 22m
JetBlue
Deal found 2/5$481

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 February 7, 2026.

Round-trip from

$358
(Southwest)

One-way from

$158
(Kiwi.com)

Popular in

January

Cheapest in

October

Average price

$370
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. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 7, 2026.
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

Thu 3/5

8:40 am-9:24 pm

1 stop16h 44m

Ontario

Mon 3/9

11:59 pm-2:03 pm

1 stop11h 04m

$290

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 7/16

10:20 am-10:25 pm

1 stop15h 05m

Ontario

Tue 7/21

1:05 pm-12:45 am

1 stop8h 40m

$419

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 4/29

2:55 pm-9:50 pm

1 stop9h 55m

Ontario

Tue 5/12

5:00 am-5:38 pm

1 stop9h 38m

$431

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 4/28

7:20 am-8:36 pm

2 stops16h 16m

Ontario

Wed 5/13

7:00 am-8:34 pm

1 stop10h 34m

$431

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 4/29

7:00 am-10:45 pm

2 stops18h 45m

Ontario

Wed 5/13

7:00 am-8:34 pm

1 stop10h 34m

$431

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 2/17

7:00 am-6:42 pm

2 stops15h 42m

Ontario

Sat 2/21

9:53 am-12:52 am

2 stops10h 59m

$441

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 5/20

5:05 am-4:20 pm

1 stop14h 15m

Ontario

Sun 5/24

9:55 pm-1:10 pm

2 stops12h 15m

$443

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 7/15

10:00 am-7:00 pm

2 stops12h 00m

Ontario

Tue 7/21

9:40 pm-12:40 pm

1 stop12h 00m

$443

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 6/3

5:05 am-4:20 pm

1 stop14h 15m

Ontario

Mon 6/8

5:15 am-7:25 pm

2 stops11h 10m

$458

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Sat 5/23

2:20 pm-9:54 pm

1 stop10h 34m

$168

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 20 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.

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 February 7, 2026.
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
9,244 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
9,244 reviews
United Airlines
7.4
Good
9,244 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

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
11,246 reviews
United Airlines
7.4
Good
9,244 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Comfort

7.3

Crew

8.1

Entertainment

7.1

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 9h 55m. American Airlines provides one of the quickest options available for as low as $431. 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, 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 February 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$355Average$600FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$367Average$520FlexibilityNo cancel feeOn-time69%

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