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

Frontier, Southwest, and United Airlines are the most popular carriers operating from Ontario to Puerto Rico

What airlines fly to Puerto Rico?

American Airlines, United Airlines and JetBlue 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 44% 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 4 operators available for flights from Ontario Airport to Puerto Rico as of October 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.

$181 Cheap Flights from Ontario to Puerto Rico in 2026/27

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.

11:30 am - 10:23 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

18h 53m2 stops Denver Intl Tampa

5:01 am - 10:17 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

21h 16m2 stops Atlanta Hartsfield-Jackson Denver Intl

$346Frontier

Sat, Dec 5 - Tue, Dec 8

6:45 am - 6:13 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

19h 28m2 stops Denver Intl Dallas/Fort Worth

6:00 am - 12:17 amSJU San Juan Luis Munoz Marin Intl-ONT Ontario

22h 17m2 stops Baltimore/Washington Denver Intl

$367Frontier

Thu, Nov 26 - Thu, Dec 3

6:00 am - 9:24 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

11h 24m1 stop Houston George Bush Intcntl

3:46 pm - 10:15 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

10h 29m1 stop Houston George Bush Intcntl

$494United Airlines

Sun, Jan 31 - Thu, Feb 4

7:45 pm - 1:04 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

13h 19m2 stops Phoenix Sky Harbor Intl Charlotte Douglas

1:54 pm - 10:07 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

12h 13m1 stop Charlotte Douglas

$494American Airlines

Tue, Dec 1 - Mon, Dec 7

6:00 am - 11:54 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

13h 54m1 stop Dallas/Fort Worth

6:28 am - 11:13 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

20h 45m1 stop Dallas/Fort Worth

$494American Airlines

Thu, Jan 21 - Mon, Jan 25

4:00 pm - 9:50 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

13h 50m2 stops Austin Bergstrom Orlando

5:40 am - 3:20 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

13h 40m2 stops Orlando Austin Bergstrom

$494Southwest

Thu, Feb 25 - Sun, Feb 28

11:20 am - 12:40 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

9h 20m2 stops Dallas Love Field Orlando

6:10 am - 8:45 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

18h 35m2 stops Baltimore/Washington Dallas Love Field

$494Southwest

Fri, Jan 29 - Sun, Feb 7

7:00 am - 11:50 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

12h 50m1 stop Atlanta Hartsfield-Jackson

3:55 pm - 10:14 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

10h 19m1 stop Atlanta Hartsfield-Jackson

$494Delta

Mon, Jan 11 - Thu, Jan 21

6:00 am - 9:24 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

11h 24m1 stop Houston George Bush Intcntl

3:46 pm - 9:40 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

9h 54m1 stop Houston George Bush Intcntl

$518United Airlines

Sun, Nov 15 - Wed, Nov 18

6:00 am - 2:44 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

16h 44m2 stops Salt Lake City New York John F Kennedy Intl

4:00 am - 4:10 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

16h 10m2 stops New York John F Kennedy Intl Salt Lake City

$2,910Delta

Tue, Dec 22 - Fri, Jan 1

Cheap last minute flights

Enter your travel dates to find the best prices.

8:35 pm - 4:26 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

16h 51m2 stops Las Vegas Harry Reid Intl Philadelphia

4:52 pm - 10:42 amSJU San Juan Luis Munoz Marin Intl-ONT Ontario

20h 50m2 stops Miami Denver Intl

$517Frontier

Fri, Oct 23 - Fri, Oct 30

11:52 am - 10:49 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

19h 57m2 stops Denver Intl Miami

2:55 am - 4:38 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

16h 43m2 stops Orlando Dallas/Fort Worth

$577Frontier

Wed, Oct 21 - Tue, Oct 27

6:15 am - 10:49 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

25h 34m2 stops Denver Intl Miami

2:55 am - 4:38 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

16h 43m2 stops Orlando Dallas/Fort Worth

$580Frontier

Sun, Oct 25 - Tue, Oct 27

11:52 am - 9:18 amONT Ontario-SJU San Juan Luis Munoz Marin Intl

18h 26m2 stops Denver Intl Orlando

3:59 pm - 10:42 amSJU San Juan Luis Munoz Marin Intl-ONT Ontario

21h 43m2 stops Atlanta Hartsfield-Jackson Denver Intl

$612Frontier

Fri, Oct 23 - Fri, Oct 30

6:00 am - 11:20 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

14h 20m1 stop Dallas/Fort Worth

6:00 am - 6:44 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

15h 44m1 stop Dallas/Fort Worth

$653American Airlines

Sat, Oct 24 - Wed, Oct 28

7:00 am - 10:02 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

12h 02m2 stops Dallas/Fort Worth Miami

6:00 am - 3:16 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

12h 16m2 stops Dallas/Fort Worth Phoenix Sky Harbor Intl

$653American Airlines

Sat, Oct 24 - Wed, Oct 28

6:00 am - 10:02 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

13h 02m2 stops Dallas/Fort Worth Miami

6:30 am - 6:44 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

15h 14m2 stops Miami Dallas/Fort Worth

$653American Airlines

Thu, Oct 22 - Sat, Oct 31

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

12h 38m2 stops Denver Intl Houston George Bush Intcntl

2:46 pm - 9:40 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

9h 54m1 stop Houston George Bush Intcntl

$796United Airlines

Wed, Oct 21 - Mon, Oct 26

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

9h 38m1 stop Denver Intl

2:46 pm - 9:40 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

9h 54m1 stop Houston George Bush Intcntl

$796United Airlines

Wed, Oct 21 - Mon, Oct 26

6:59 am - 8:00 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl

10h 01m1 stop Chicago O'Hare Intl

6:40 am - 6:01 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario

14h 21m2 stops Houston George Bush Intcntl San Francisco

$796United Airlines

Sun, Oct 25 - Wed, Oct 28

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Frontier flights from Ontario to Puerto Rico

Our best Frontier deals on Ontario to Puerto Rico flight tickets

Frontier

Dec 4

ONT11:30 amOntario

21h 54m

2 stops

SJU1:24 pmSan Juan Luis Munoz Marin Intl

Dec 8

SJU5:01 amSan Juan Luis Munoz Marin Intl

21h 16m

2 stops

ONT10:17 pmOntario

$346

Frontier

Nov 26

ONT6:45 amOntario

19h 28m

2 stops

SJU6:13 amSan Juan Luis Munoz Marin Intl

Dec 3

SJU6:00 amSan Juan Luis Munoz Marin Intl

22h 17m

2 stops

ONT12:17 amOntario

$367

Frontier

Dec 4

ONT11:30 amOntario

19h 07m

2 stops

SJU10:37 amSan Juan Luis Munoz Marin Intl

Dec 8

SJU5:01 amSan Juan Luis Munoz Marin Intl

21h 16m

2 stops

ONT10:17 pmOntario

$399

American Airlines flights from Ontario to Puerto Rico

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

American Airlines

Feb 6

ONT1:24 pmOntario

16h 14m

2 stops

SJU9:38 amSan Juan Luis Munoz Marin Intl

Feb 13

SJU1:20 amSan Juan Luis Munoz Marin Intl

11h 17m

2 stops

ONT8:37 amOntario

$494

American Airlines

Dec 1

ONT10:30 pmOntario

18h 42m

1 stop

SJU9:12 pmSan Juan Luis Munoz Marin Intl

Dec 6

SJU6:48 amSan Juan Luis Munoz Marin Intl

20h 05m

1 stop

ONT10:53 pmOntario

$534

American Airlines

Nov 1

ONT7:49 pmOntario

12h 45m

2 stops

SJU12:34 pmSan Juan Luis Munoz Marin Intl

Nov 13

SJU8:30 amSan Juan Luis Munoz Marin Intl

13h 40m

2 stops

ONT6:10 pmOntario

$552

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 12/5

11:30 am-10:23 am

2 stops18h 53m

San Juan Luis Munoz Marin Intl

Tue 12/8

5:01 am-10:17 pm

2 stops21h 16m

$346

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 11/26

6:45 am-6:13 am

2 stops19h 28m

San Juan Luis Munoz Marin Intl

Thu 12/3

6:00 am-12:17 am

2 stops22h 17m

$367

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 1/31

6:00 am-9:24 pm

1 stop11h 24m

San Juan Luis Munoz Marin Intl

Thu 2/4

3:46 pm-10:15 pm

1 stop10h 29m

$494

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Tue 12/1

7:45 pm-1:04 pm

2 stops13h 19m

San Juan Luis Munoz Marin Intl

Mon 12/7

1:54 pm-10:07 pm

1 stop12h 13m

$494

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 1/21

6:00 am-11:54 pm

1 stop13h 54m

San Juan Luis Munoz Marin Intl

Mon 1/25

6:28 am-11:13 pm

1 stop20h 45m

$494

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 2/25

4:00 pm-9:50 am

2 stops13h 50m

San Juan Luis Munoz Marin Intl

Sun 2/28

5:40 am-3:20 pm

2 stops13h 40m

$494

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Fri 1/29

11:20 am-12:40 am

2 stops9h 20m

San Juan Luis Munoz Marin Intl

Sun 2/7

6:10 am-8:45 pm

2 stops18h 35m

$494

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Mon 1/11

7:00 am-11:50 pm

1 stop12h 50m

San Juan Luis Munoz Marin Intl

Thu 1/21

3:55 pm-10:14 pm

1 stop10h 19m

$494

Quickest round-trip

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 11/15

6:00 am-9:24 pm

1 stop11h 24m

San Juan Luis Munoz Marin Intl

Wed 11/18

3:46 pm-9:40 pm

1 stop9h 54m

$518

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Tue 12/22

6:00 am-2:44 am

2 stops16h 44m

San Juan Luis Munoz Marin Intl

Fri 1/1

4:00 am-4:10 pm

2 stops16h 10m

$2,910

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 $582 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 $405 on momondo.

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

You could potentially save up to 18% 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	$181
Fastest flight time	9h 25m
Direct flights	None

The best one-way flight to Puerto Rico from Ontario in the past 72 hours is $181. The best round-trip flight deal from Ontario to Puerto Rico found on momondo in the last 72 hours is $346.

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 4 operators available for flights from Ontario Airport to Puerto Rico as of October 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 8,651 reviews	Search Delta flights
United Airlines	PriceFrom $318	Free Cancellation	Rating 7.3 10,388 reviews	Search United Airlines flights
American Airlines	PriceFrom $376	Free Cancellation	Rating 7.0 12,177 reviews	Search American Airlines flights
Southwest	PriceFrom $419	Free Cancellation	Rating 7.9 4,210 reviews	Search Southwest flights
Frontier	PriceFrom $473	Free Cancellation	Rating 5.5 2,527 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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Popular cities

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Feeling lucky

Popular cities in Puerto Rico

Flights to San Juanfrom $73

Flights to Aguadillafrom $175

Flights to Poncefrom $215

Flights to Viequesfrom $557

Flights to Culebrafrom $397

Flights to Mayagüezfrom $366

Cheap flights from Ontario to Puerto Rico from $181

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 11/7. 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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Frontier flights from Ontario to Puerto Rico

Our best Frontier 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