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Puerto Rico

$142+ 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 3/2. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
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 January 7, 2026.

Round-trip from

$284
(American Airlines)

One-way from

$168
(Delta)

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 ($46 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 January 2026
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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 January 7, 2026.

This American Airlines deal was found by Cheapflights users on 1/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/314:45 pmONT - SJU
2 stops15h 42mAmerican Airlines
Sat 2/76:05 amSJU - ONT
2 stops16h 15mAmerican Airlines
Deal found 1/5$284
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/296:20 amONT - SJU
2 stops24h 04mMultiple Airlines
Wed 2/47:44 pmSJU - ONT
1 stop22h 43mMultiple Airlines
Deal found 1/5$301
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/292:06 pmONT - SJU
1 stop18h 21mMultiple Airlines
Tue 2/104:11 pmSJU - ONT
2 stops30h 11mMultiple Airlines
Deal found 1/6$303
This United Airlines deal was found by Cheapflights users on 1/5. 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 4/85:10 amONT - SJU
1 stop9h 28mUnited Airlines
Wed 4/157:20 amSJU - ONT
2 stops17h 30mUnited Airlines
Deal found 1/5$313
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/292:06 pmONT - SJU
1 stop18h 21mMultiple Airlines
Tue 2/38:00 amSJU - ONT
2 stops35h 07mMultiple Airlines
Deal found 1/5$318
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/292:06 pmONT - SJU
1 stop18h 21mMultiple Airlines
Mon 2/28:00 amSJU - ONT
2 stops35h 07mMultiple Airlines
Deal found 1/5$324
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/56:20 amONT - SJU
2 stops48h 19mMultiple Airlines
Thu 2/127:44 pmSJU - ONT
1 stop29h 04mMultiple Airlines
Deal found 1/6$336
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Sat 1/244:45 pmONT - SJU
2 stops15h 45mAmerican Airlines
Sat 1/316:05 amSJU - ONT
2 stops16h 15mAmerican Airlines
Deal found 1/6$342
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/32:06 pmONT - SJU
2 stops29h 03mMultiple Airlines
Tue 3/106:49 pmSJU - ONT
1 stop24h 26mMultiple Airlines
Deal found 1/6$348
This American Airlines deal was found by Cheapflights users on 1/5. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/27:05 pmONT - SJU
2 stops14h 28mAmerican Airlines
Fri 3/67:01 pmSJU - ONT
2 stops19h 05mAmerican Airlines
Deal found 1/5$362
This Delta deal was found by Cheapflights users on 1/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/310:20 pmONT - SJU
1 stop10h 41mDelta
Thu 3/121:00 pmSJU - ONT
1 stop11h 04mDelta
Deal found 1/5$367
This United Airlines deal was found by Cheapflights users on 1/5. 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.
Mon 3/26:00 amONT - BQN
2 stops13h 57mUnited Airlines
Tue 3/31:09 amBQN - ONT
2 stops15h 39mUnited Airlines
Deal found 1/5$485

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 January 7, 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

Sat 2/21

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Wed 2/25

3:46 pm-9:59 pm

1 stop10h 13m

$374

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 3/2

10:20 pm-1:01 pm

1 stop10h 41m

San Juan Luis Munoz Marin Intl

Tue 3/10

2:07 pm-11:50 pm

2 stops12h 43m

$398

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 2/2

11:59 pm-3:59 pm

2 stops12h 00m

San Juan Luis Munoz Marin Intl

Mon 2/9

7:07 am-10:48 pm

1 stop19h 41m

$405

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 2/15

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Thu 2/19

3:46 pm-9:59 pm

1 stop10h 13m

$431

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 1/22

5:05 am-6:25 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Thu 1/29

3:46 pm-9:58 pm

1 stop10h 12m

$432

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 1/23

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Tue 1/27

3:46 pm-9:58 pm

1 stop10h 12m

$432

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 1/12

10:30 pm-1:05 pm

1 stop10h 35m

San Juan Luis Munoz Marin Intl

Fri 1/16

2:15 pm-9:05 pm

1 stop10h 50m

$460

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 3/2

11:59 pm-3:03 pm

1 stop11h 04m

San Juan Luis Munoz Marin Intl

Thu 3/12

3:01 pm-10:30 pm

1 stop10h 29m

$466

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 2/20

1:45 pm-6:11 am

2 stops12h 26m

San Juan Luis Munoz Marin Intl

Wed 2/25

3:46 pm-9:59 pm

1 stop10h 13m

$485

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 3/2

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Tue 3/10

6:40 am-5:41 pm

2 stops14h 01m

$485

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/4

Showing 1-10 of 24 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 $137). Flying from Ontario to Puerto Rico in January is currently the most expensive (average of $289). 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 January 7, 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
4,249 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
4,249 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
8,022 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
9,138 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
11,088 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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
3,063 reviews
Southwest
8.0
Very good
4,249 reviews

Boarding

8.1

Overall

8.0

Food

7.0

Comfort

8.0

Crew

8.6

Entertainment

7.5

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 10h 41m. 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 $137). Flying from Ontario to Puerto Rico in January is currently the most expensive (average of $289). 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 January 7, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$509FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$321Average$554FlexibilityNo cancel feeOn-time69%
DeltaCheapest$355Average$530FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$365Average$605FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$480Average$610FlexibilityNo cancel feeOn-time63%

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