What is the cheapest airline that flies from Ontario to Puerto Rico?

United Airlines and JetBlue are the most popular carriers operating from Ontario to Puerto Rico

What airlines fly to Puerto Rico?

American Airlines, JetBlue and United Airlines are the top three most popular airlines that fly to Puerto Rico from Ontario according to our data. American Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Puerto Rico. Keep in mind that there are 6 different airlines that fly to Puerto Rico on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Ontario Airport to Puerto Rico?

Prices for flights from Ontario Airport to Puerto Rico are updated daily.

How many operators does momondo search for flights from Ontario Airport to Puerto Rico?

There are 6 operators available for flights from Ontario Airport to Puerto Rico as of August 2026.

How old do you have to be to fly from Ontario Airport to Puerto Rico?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Puerto Rico.

What documentation or ID do you need to fly to Puerto Rico?

The travel and health documents you'll need for your trip to Puerto Rico may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Puerto Rico. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$171 Cheap Flights from Ontario to Puerto Rico in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Ontario to Puerto Rico

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:10 pm - 11:20 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

10h 10m1 stop Charlotte Douglas

6:20 am - 9:11 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

17h 51m2 stops Miami Dallas/Fort Worth

$342American Airlines

Sat, Oct 24 - Wed, Oct 28

4:29 pm - 11:31 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

16h 02m2 stops Phoenix Sky Harbor Intl Miami

6:00 am - 9:21 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

18h 21m1 stop Dallas/Fort Worth

$342American Airlines

Mon, Oct 19 - Sat, Oct 24

6:00 am - 8:38 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

11h 38m1 stop Houston George Bush Intcntl

1:21 pm - 8:51 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

10h 30m1 stop Denver Intl

$342United Airlines

Tue, Oct 20 - Tue, Oct 27

6:50 pm - 11:50 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

13h 00m2 stops Las Vegas Harry Reid Intl Orlando

5:40 am - 2:40 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

13h 00m2 stops Orlando Denver Intl

$382Southwest

Sun, Nov 8 - Wed, Nov 11

7:50 am - 9:15 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

9h 25m2 stops Austin Bergstrom Orlando

5:45 am - 2:30 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

12h 45m2 stops Orlando Austin Bergstrom

$382Southwest

Wed, Jan 27 - Mon, Feb 1

5:44 pm - 3:19 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

18h 35m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson

7:00 am - 5:48 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

13h 48m2 stops Fort Lauderdale Houston George Bush Intcntl

$389Frontier

Tue, Sep 29 - Mon, Oct 5

6:25 am - 12:59 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

14h 34m2 stops Denver Intl Atlanta Hartsfield-Jackson

7:23 am - 11:51 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

20h 28m2 stops Orlando Denver Intl

$420Frontier

Tue, Nov 10 - Sat, Nov 14

5:59 pm - 2:04 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

16h 05m2 stops Seattle/Tacoma Intl Detroit Metropolitan Wayne County

3:15 pm - 11:49 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

12h 34m2 stops Detroit Metropolitan Wayne County Salt Lake City

$426Delta

Mon, Nov 9 - Thu, Nov 12

5:59 pm - 4:56 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

18h 57m2 stops Seattle/Tacoma Intl New York John F Kennedy Intl

7:00 am - 11:00 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

20h 00m2 stops New York John F Kennedy Intl Seattle/Tacoma Intl

$426Delta

Mon, Nov 9 - Sat, Nov 14

5:00 am - 6:25 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

9h 25m1 stop Denver Intl

2:21 pm - 8:20 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

9h 59m1 stop Denver Intl

$432United Airlines

Wed, Dec 9 - Mon, Dec 14

Cheap last minute flights

Enter your travel dates to find the best prices.

5:00 am - 11:50 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

15h 50m2 stops Denver Intl Newark

2:21 pm - 8:20 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

9h 59m1 stop Denver Intl

$502United Airlines

Wed, Sep 2 - Tue, Dec 8

5:00 am - 11:50 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

15h 50m2 stops Denver Intl Newark

8:25 am - 5:36 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

13h 11m2 stops Chicago O'Hare Intl San Francisco

$502United Airlines

Wed, Sep 2 - Tue, Dec 8

10:00 am - 11:55 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

10h 55m2 stops Nashville Intl Orlando

6:30 am - 4:10 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

12h 40m2 stops Orlando Denver Intl

$662Southwest

Fri, Sep 4 - Sun, Sep 6

6:20 am - 8:05 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

10h 45m2 stops Denver Intl Orlando

6:25 am - 3:15 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

11h 50m2 stops Orlando Phoenix Sky Harbor Intl

$662Southwest

Thu, Sep 3 - Sat, Sep 5

12:33 pm - 9:43 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

18h 10m2 stops Dallas/Fort Worth Miami

3:44 pm - 10:59 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

10h 15m1 stop Dallas/Fort Worth

$687American Airlines

Thu, Sep 3 - Sat, Sep 5

5:00 am - 8:38 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

12h 38m2 stops Denver Intl Houston George Bush Intcntl

2:20 pm - 9:59 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

10h 39m1 stop Houston George Bush Intcntl

$752United Airlines

Tue, Sep 1 - Thu, Sep 3

11:59 pm - 8:38 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

17h 39m1 stop New York John F Kennedy Intl

5:01 am - 10:44 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

20h 43m1 stop New York John F Kennedy Intl

$1,261JetBlue

Fri, Sep 4 - Sun, Sep 6

7:05 am - 10:29 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

12h 24m1 stop Atlanta Hartsfield-Jackson

1:58 pm - 8:59 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

11h 01m1 stop Atlanta Hartsfield-Jackson

$1,398Delta

Wed, Sep 2 - Tue, Dec 8

11:59 pm - 3:59 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

13h 00m1 stop New York John F Kennedy Intl

1:00 pm - 8:57 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

10h 57m1 stop New York John F Kennedy Intl

$1,412JetBlue

Thu, Sep 3 - Sat, Oct 3

11:59 pm - 2:14 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

11h 15m1 stop New York John F Kennedy Intl

1:00 pm - 8:57 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

10h 57m1 stop New York John F Kennedy Intl

$1,653JetBlue

Thu, Sep 3 - Tue, Sep 22

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United Airlines flights from Ontario to Puerto Rico

Our best United Airlines deals on Ontario to Puerto Rico flight tickets

United Airlines

Sep 21

ONT6:00 amOntario

11h 38m

1 stop

SJU8:38 pmSan Juan Luis Munoz Marin Intl

Sep 22

SJU1:00 amSan Juan Luis Munoz Marin Intl

14h 12m

2 stops

ONT12:12 pmOntario

$432

United Airlines

Jan 23

ONT6:00 amOntario

13h 57m

2 stops

BQN11:57 pmAguadilla Borinquen

Feb 5

BQN1:09 amAguadilla Borinquen

15h 24m

3 stops

ONT12:33 pmOntario

$434

United Airlines

Oct 1

ONT5:00 amOntario

9h 38m

1 stop

SJU5:38 pmSan Juan Luis Munoz Marin Intl

Oct 4

SJU1:00 amSan Juan Luis Munoz Marin Intl

14h 46m

2 stops

ONT12:46 pmOntario

$452

American Airlines flights from Ontario to Puerto Rico

Our best American Airlines deals on Ontario to Puerto Rico flight tickets

American Airlines

Oct 24

ONT10:10 pmOntario

13h 51m

1 stop

SJU3:01 pmSan Juan Luis Munoz Marin Intl

Oct 28

SJU3:51 pmSan Juan Luis Munoz Marin Intl

10h 08m

1 stop

ONT10:59 pmOntario

$342

American Airlines

Jan 27

ONT7:30 pmOntario

11h 18m

2 stops

SJU10:48 amSan Juan Luis Munoz Marin Intl

Feb 1

SJU6:00 amSan Juan Luis Munoz Marin Intl

18h 48m

1 stop

ONT8:48 pmOntario

$347

American Airlines

Jan 16

ONT7:30 pmOntario

13h 38m

2 stops

SJU1:08 pmSan Juan Luis Munoz Marin Intl

Feb 1

SJU6:00 amSan Juan Luis Munoz Marin Intl

18h 48m

1 stop

ONT8:48 pmOntario

$392

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sat 10/24

10:10 pm-11:20 am

1 stop10h 10m

San Juan Luis Munoz Marin Intl

Wed 10/28

6:20 am-9:11 pm

2 stops17h 51m

$342

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Mon 10/19

4:29 pm-11:31 am

2 stops16h 02m

San Juan Luis Munoz Marin Intl

Sat 10/24

6:00 am-9:21 pm

1 stop18h 21m

$342

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Tue 10/20

6:00 am-8:38 pm

1 stop11h 38m

San Juan Luis Munoz Marin Intl

Tue 10/27

1:21 pm-8:51 pm

1 stop10h 30m

$342

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 11/8

6:50 pm-11:50 am

2 stops13h 00m

San Juan Luis Munoz Marin Intl

Wed 11/11

5:40 am-2:40 pm

2 stops13h 00m

$382

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Wed 1/27

7:50 am-9:15 pm

2 stops9h 25m

San Juan Luis Munoz Marin Intl

Mon 2/1

5:45 am-2:30 pm

2 stops12h 45m

$382

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Tue 9/29

5:44 pm-3:19 pm

2 stops18h 35m

San Juan Luis Munoz Marin Intl

Mon 10/5

7:00 am-5:48 pm

2 stops13h 48m

$389

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Tue 11/10

6:25 am-12:59 am

2 stops14h 34m

San Juan Luis Munoz Marin Intl

Sat 11/14

7:23 am-11:51 pm

2 stops20h 28m

$420

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Mon 11/9

5:59 pm-2:04 pm

2 stops16h 05m

San Juan Luis Munoz Marin Intl

Thu 11/12

3:15 pm-11:49 pm

2 stops12h 34m

$426

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Mon 11/9

5:59 pm-4:56 pm

2 stops18h 57m

San Juan Luis Munoz Marin Intl

Sat 11/14

7:00 am-11:00 pm

2 stops20h 00m

$426

Quickest round-trip

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Wed 12/9

5:00 am-6:25 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Mon 12/14

2:21 pm-8:20 pm

1 stop9h 59m

$432

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Ontario to Puerto Rico

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Puerto Rico?

If you don’t want to visit Puerto Rico in October, then you should wait until August to fly from Ontario, when ticket prices are also cheap, with an average price of $456.

How far in advance should I book a flight from Ontario to Puerto Rico?

You are more likely to see cheaper flights to Puerto Rico from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Puerto Rico for around $570 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Puerto Rico from Ontario for as low as $429 on momondo.

Can stopping save me money on Ontario to Puerto Rico flights?

You could potentially save up to 36% on your flight if you consider stops on a Ontario to Puerto Rico flight.

Cheap Ontario to Puerto Rico flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to Puerto Rico

Best Price Found	$171
Fastest flight time	9h 25m
Direct flights	None

The best one-way flight to Puerto Rico from Ontario in the past 72 hours is $171. The best round-trip flight deal from Ontario to Puerto Rico found on momondo in the last 72 hours is $342.

The fastest flight from Ontario to Puerto Rico takes 9h 25m

There are no direct flights from Ontario to Puerto Rico. There are no popular flight routes from Ontario to Puerto Rico.

Search flight deals

Frequently asked questions about flying from Ontario to Puerto Rico

When did momondo last update prices for flights from Ontario Airport to Puerto Rico?
Prices for flights from Ontario Airport to Puerto Rico are updated daily.
How many operators does momondo search for flights from Ontario Airport to Puerto Rico?
There are 6 operators available for flights from Ontario Airport to Puerto Rico as of August 2026.
How old do you have to be to fly from Ontario Airport to Puerto Rico?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ontario Airport to Puerto Rico.
What documentation or ID do you need to fly to Puerto Rico?
The travel and health documents you'll need for your trip to Puerto Rico may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Puerto Rico. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Ontario to Puerto Rico

Compare and see reviews for airlines that fly from Ontario to Puerto Rico with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $168	Free Cancellation	Rating 7.8 8,535 reviews	Search Delta flights
United Airlines	PriceFrom $318	Free Cancellation	Rating 7.4 10,148 reviews	Search United Airlines flights
American Airlines	PriceFrom $376	Free Cancellation	Rating 7.1 12,021 reviews	Search American Airlines flights
Southwest	PriceFrom $419	Free Cancellation	Rating 8.0 4,197 reviews	Search Southwest flights
JetBlue	PriceFrom $460	Free Cancellation	Rating 7.1 3,034 reviews	Search JetBlue flights
Frontier	PriceFrom $473	Free Cancellation	Rating 5.6 2,635 reviews	Search Frontier flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Puerto Rico?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Ontario to Puerto Rico for you.

Can I find flights from Ontario to Puerto Rico with flexible booking policies on momondo?

Yes. All flights to Puerto Rico from Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Ontario to Puerto Rico?

momondo helps you find the best flight between Ontario and Puerto Rico by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Ontario to Puerto Rico right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Ontario to Puerto Rico now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Puerto Rico and let you know when they change.

An easier way to manage your Puerto Rico trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Find better results for your trip to Puerto Rico

Popular cities

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Complete your trip

Feeling lucky

Popular cities in Puerto Rico

Flights to San Juanfrom $93

Flights to Aguadillafrom $228

Flights to Poncefrom $236

Flights to Culebrafrom $393

Flights to Mayagüezfrom $286

Cheap flights from Ontario to Puerto Rico from $171

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Puerto Rico departing on 1/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Ontario to Puerto Rico

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Big names and deals

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Trusted and free

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United Airlines flights from Ontario to Puerto Rico

Our best United Airlines deals on Ontario to Puerto Rico flight tickets

American Airlines flights from Ontario to Puerto Rico

Our best American Airlines deals on Ontario to Puerto Rico flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.

See travel insights to Puerto Rico from

How to get the cheapest flight ticket from Ontario to Puerto Rico

What is the cheapest month to fly to Puerto Rico?

How far in advance should I book a flight from Ontario to Puerto Rico?

Can stopping save me money on Ontario to Puerto Rico flights?

What is the cheapest airline that flies from Ontario to Puerto Rico?

What airlines fly to Puerto Rico?

Cheap Ontario to Puerto Rico flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Ontario to Puerto Rico

Best airlines flying from Ontario to Puerto Rico

Compare and see reviews for airlines that fly from Ontario to Puerto Rico with momondo

Why use momondo?

An easier way to manage your Puerto Rico trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Puerto Rico

Popular cities in Puerto Rico

Popular flights according to clicks in the last 7 days on momondo

Ontario flight routes

According to popular flight searches on momondo this year

Puerto Rico flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Puerto Rico

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Puerto Rico

List of cabin classes available on flights landing in Puerto Rico. Availability may vary depending on flight origin and airline.

Complete your trip to Puerto Rico

Explore popular destinations other users love

According to popular flight searches on momondo this year