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Puerto Rico

$139+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
feb. 26 — mar. 51
jue. 2/26
jue. 3/5
1 adult, Economy
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Cheap 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 enero 27, 2026.

This American Airlines deal was found by Cheapflights users on 1/26. 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.
lun. 3/211:58 pm
ONT
-
SJU
2 stops14h 11m
American Airlines
vie. 3/67:33 am
SJU
-
ONT
1 stop20h 26m
American Airlines
Deal found 1/26$284
This Kiwi.com deal was found by Cheapflights users on 1/27. 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. 2/272:21 pm
ONT
-
SJU
1 stop17h 16m
Multiple Airlines
mar. 3/311:07 am
SJU
-
ONT
2 stops14h 27m
Multiple Airlines
Deal found 1/27$311
This United Airlines deal was found by Cheapflights users on 1/24. 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.
mié. 4/295:10 am
ONT
-
SJU
2 stops13h 14m
United Airlines
jue. 5/71:40 pm
SJU
-
ONT
1 stop9h 56m
United Airlines
Deal found 1/24$315
This Kiwi.com deal was found by Cheapflights users on 1/26. 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.
lun. 2/93:36 pm
ONT
-
SJU
1 stop16h 51m
Multiple Airlines
jue. 2/127:54 pm
SJU
-
ONT
2 stops39h 32m
Multiple Airlines
Deal found 1/26$319
This United Airlines deal was found by Cheapflights users on 1/25. 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.
dom. 5/105:00 am
ONT
-
SJU
1 stop9h 38m
United Airlines
mié. 5/132:55 pm
SJU
-
ONT
1 stop10h 03m
United Airlines
Deal found 1/25$329
This Kiwi.com deal was found by Cheapflights users on 1/26. 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. 4/75:18 pm
ONT
-
SJU
1 stop14h 49m
Multiple Airlines
jue. 4/96:00 am
SJU
-
ONT
2 stops15h 45m
Multiple Airlines
Deal found 1/26$331
This Delta deal was found by Cheapflights users on 1/26. 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.
dom. 5/1010:59 pm
ONT
-
SJU
1 stop9h 47m
Delta
sáb. 5/167:30 am
SJU
-
ONT
1 stop13h 45m
Delta
Deal found 1/26$336
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
sáb. 2/216:00 am
ONT
-
SJU
2 stops38h 54m
Multiple Airlines
sáb. 2/287:44 pm
SJU
-
ONT
1 stop22h 45m
Multiple Airlines
Deal found 1/25$346
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
lun. 4/67:35 pm
ONT
-
SJU
1 stop12h 32m
Multiple Airlines
lun. 4/136:07 pm
SJU
-
ONT
2 stops32h 48m
Multiple Airlines
Deal found 1/25$350
This American Airlines deal was found by Cheapflights users on 1/25. 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.
sáb. 2/2810:37 pm
ONT
-
SJU
1 stop19h 12m
American Airlines
vie. 3/64:40 pm
SJU
-
ONT
2 stops20h 08m
American Airlines
Deal found 1/25$362
This Kiwi.com deal was found by Cheapflights users on 1/26. 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. 4/27:40 pm
ONT
-
SJU
1 stop12h 27m
Multiple Airlines
lun. 4/66:07 pm
SJU
-
ONT
2 stops49h 16m
Multiple Airlines
Deal found 1/26$363
This United Airlines deal was found by Cheapflights users on 1/26. 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. 3/25:00 am
ONT
-
BQN
2 stops14h 57m
United Airlines
mar. 3/31:09 am
BQN
-
ONT
2 stops15h 39m
United Airlines
Deal found 1/26$552

Find 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 enero 27, 2026.

Round-trip from

$284
(American Airlines)

One-way from

$139
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$486
From Ontario to Puerto Rico
Search Deals
One-way flight from Ontario to Puerto Rico
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($46 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 enero 27, 2026.
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

dom. 5/10

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

mié. 5/13

7:20 am-8:36 pm

2 stops16h 16m

$284

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mié. 4/29

5:10 am-9:24 pm

2 stops13h 14m

San Juan Luis Munoz Marin Intl

jue. 5/7

1:40 pm-8:36 pm

1 stop9h 56m

$315

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

sáb. 5/9

10:59 pm-11:46 am

1 stop9h 47m

San Juan Luis Munoz Marin Intl

mar. 5/12

2:20 pm-10:09 pm

1 stop10h 49m

$336

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

dom. 5/10

7:00 am-10:54 pm

1 stop12h 54m

San Juan Luis Munoz Marin Intl

mar. 5/12

2:20 pm-10:09 pm

1 stop10h 49m

$368

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

lun. 5/18

5:05 pm-11:46 am

2 stops15h 41m

San Juan Luis Munoz Marin Intl

sáb. 5/23

2:20 pm-10:09 pm

1 stop10h 49m

$368

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mar. 5/12

6:00 am-8:38 pm

1 stop11h 38m

San Juan Luis Munoz Marin Intl

mié. 5/13

7:20 am-10:30 pm

2 stops18h 10m

$369

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

jue. 5/7

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

lun. 5/11

1:00 am-12:38 pm

2 stops14h 38m

$374

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

mar. 4/28

5:10 am-9:24 pm

2 stops13h 14m

San Juan Luis Munoz Marin Intl

lun. 5/4

1:00 am-12:38 pm

2 stops14h 38m

$374

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

sáb. 5/9

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

mié. 5/13

7:20 am-10:30 pm

2 stops18h 10m

$374

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

lun. 5/4

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

vie. 5/8

2:55 pm-9:58 pm

1 stop10h 03m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Showing 1-10 of 38 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 $145). 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.

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 enero 27, 2026.
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
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,268 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,118 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,205 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,197 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.7
Fair
3,056 reviews
Southwest
8.0
Very good
4,268 reviews

Crew

8.6

Comfort

8.0

Entertainment

7.5

Overall

8.0

Boarding

8.1

Food

7.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

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 38m. There are 3334 mi between Ontario and Puerto Rico. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ontario to Puerto Rico one-way?

    One-way options have recently been found by users for as low as $168 on Delta. Other airlines that offer cheap prices include American Airlines from $172 and United Airlines from $178 one-way.

  • 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 $145). 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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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 enero 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$509FlexibilityNo cancel feeOn-time62%
DeltaCheapest$292Average$530FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$321Average$536FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$365Average$615FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$480Average$605FlexibilityNo cancel feeOn-time63%

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