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Puerto Rico

$122+ Cheap flights from Ontario (ONT) to Puerto Rico

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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
dic. 13 — dic. 201
sáb. 12/13
sáb. 12/20
1 adult, Economy
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Cheap flight deals from Ontario to Puerto Rico

Keep the following information in mind while searching for Ontario to Puerto Rico flight deals. Data was last updated noviembre 13, 2025.

Round-trip from

$282
(Kiwi.com)

One-way from

$122
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$489
From Ontario to Puerto Rico
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One-way flight from Ontario to Puerto Rico
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Highest demand for flights based on searches. 9% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in November 2025
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Find flight deals from Ontario to Puerto Rico

Cheapest flights from Ontario to Puerto Rico
Explore the most affordable flight options available from Ontario to Puerto Rico. Find the lowest fares from popular airlines and budget airlines, with prices last updated on noviembre 13, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/304:41 pmONT - SJU
1 stop27h 52mMultiple Airlines
lun. 1/129:00 amSJU - ONT
2 stops18h 59mMultiple Airlines
Deal found 11/12$282
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 12/52:05 pmONT - SJU
1 stop29h 20mMultiple Airlines
dom. 12/76:00 amSJU - ONT
1 stop14h 33mMultiple Airlines
Deal found 11/12$300
This Kiwi.com deal was found by Cheapflights users on 11/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/117:33 pmONT - SJU
1 stop25h 02mMultiple Airlines
jue. 12/183:21 pmSJU - ONT
2 stops29h 48mMultiple Airlines
Deal found 11/12$306
This American Airlines deal was found by Cheapflights users on 11/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/410:34 pmONT - SJU
1 stop10h 27mAmerican Airlines
mié. 12/107:00 amSJU - ONT
1 stop19h 28mAmerican Airlines
Deal found 11/12$355
This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/910:34 pmONT - SJU
1 stop19h 35mAmerican Airlines
mar. 12/163:45 pmSJU - ONT
1 stop10h 43mAmerican Airlines
Deal found 11/11$414
This United Airlines deal was found by Cheapflights users on 11/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/95:05 amONT - SJU
2 stops13h 17mUnited Airlines
lun. 12/152:05 amSJU - ONT
2 stops14h 27mUnited Airlines
Deal found 11/11$421
This United Airlines deal was found by Cheapflights users on 11/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/65:05 amONT - SJU
1 stop9h 20mUnited Airlines
mar. 12/93:46 pmSJU - ONT
1 stop10h 03mUnited Airlines
Deal found 11/13$445
This CheapOair deal was found by Cheapflights users on 11/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/254:16 pmONT - SJU
1 stop10h 18mFrontier
lun. 12/297:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 11/12$453
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 11/147:00 amONT - BQN
2 stops12h 57mUnited Airlines
mié. 11/191:09 amBQN - ONT
2 stops15h 28mUnited Airlines
Deal found 11/12$765
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 11/175:05 amONT - BQN
2 stops14h 52mUnited Airlines
sáb. 11/221:09 amBQN - ONT
2 stops15h 24mUnited Airlines
Deal found 11/12$905
This United Airlines deal was found by Cheapflights users on 11/12. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/157:00 amONT - BQN
2 stops12h 57mUnited Airlines
vie. 11/211:09 amBQN - ONT
2 stops25h 22mUnited Airlines
Deal found 11/12$915
This United Airlines deal was found by Cheapflights users on 11/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 11/155:05 amONT - BQN
2 stops14h 52mUnited Airlines
dom. 11/161:09 amBQN - ONT
2 stops23h 35mUnited Airlines
Deal found 11/11$945

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Puerto Rico 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 noviembre 13, 2025.
Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.

Fly from

Ontario

Fly to

Puerto Rico

Route

Depart

Return

Price

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

vie. 1/16

7:55 pm-11:15 am

2 stops11h 20m

San Juan Luis Munoz Marin Intl

sáb. 1/24

5:30 am-2:50 pm

2 stops13h 20m

$414

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mié. 2/25

5:00 am-6:25 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

mar. 3/3

2:05 am-5:41 pm

2 stops19h 36m

$415

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mar. 12/9

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

lun. 12/15

2:05 am-12:32 pm

2 stops14h 27m

$421

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

sáb. 2/14

1:37 pm-2:50 am

2 stops33h 13m

San Juan Luis Munoz Marin Intl

sáb. 2/21

7:49 pm-6:01 pm

1 stop26h 12m

$437

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mié. 12/10

5:05 am-10:22 pm

2 stops13h 17m

San Juan Luis Munoz Marin Intl

mié. 12/17

3:46 pm-9:49 pm

1 stop10h 03m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mar. 1/20

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

vie. 1/23

3:46 pm-9:58 pm

1 stop10h 12m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

dom. 12/7

5:05 am-6:25 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

mié. 12/17

3:46 pm-9:49 pm

1 stop10h 03m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mar. 12/9

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

mié. 12/17

3:46 pm-9:49 pm

1 stop10h 03m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

lun. 1/12

5:05 am-6:25 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

jue. 1/22

3:46 pm-9:58 pm

1 stop10h 12m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mié. 12/10

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

lun. 12/15

2:05 am-12:32 pm

2 stops14h 27m

$520

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 36 results
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Best time to book a flight from Ontario to Puerto Rico

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

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

Currently, April is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $128). Flying from Ontario to Puerto Rico in November is currently the most expensive (average of $286). 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 ONT to PR?

Find hourly flight availability from Ontario to Puerto Rico. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated noviembre 13, 2025.

One of the essential ways to save on airfare from Ontario to Puerto Rico is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 32% on airfare.

Reviews of airlines servicing Puerto Rico

Get insights into the airlines that provide service to Puerto Rico. 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 Puerto Rico. Reviews last updated noviembre 13, 2025.
Read through reviews of airlines operating flights from Ontario to Puerto Rico, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
8,007 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
9,017 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,051 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,109 reviews
Southwest
8.0
Very good
4,242 reviews

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

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

    Ontario (ONT) is the airport you will fly out of if you book a flight from Ontario to Puerto Rico. It is only a 3.1 mi journey to Ontario (ONT) from Ontario’s city center.

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

    Departing from Ontario to Puerto Rico will take you 9h 25m. There are 3334 mi between Ontario and Puerto Rico. This flight may include one or multiple stops.

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

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

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

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

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

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

    Currently, April is the cheapest month in which you can book a flight from Ontario to Puerto Rico (average of $128). Flying from Ontario to Puerto Rico in November is currently the most expensive (average of $286). 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 Ontario to Puerto Rico

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Ontario to Puerto Rico

Discover the top 5 airlines that operate flights from Ontario to Puerto Rico. 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 noviembre 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$467FlexibilityNo cancel feeOn-time62%
DeltaCheapest$355Average$532FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$355Average$574FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$365Average$609FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$409Average$598FlexibilityNo cancel feeOn-time63%

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