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Cheap flights from Ontario to Puerto Rico from $168

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 9/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Ontario to Puerto Rico

Cheap round-trip flights

Frontier Logo
7:44 pm - 5:54 pmONT-SJU
18h 10m2 stops
Frontier Logo
10:39 pm - 12:37 pmSJU-ONT
17h 58m2 stops
$251Frontier
Find Deal
Fri, Nov 7 - Fri, Nov 14
Frontier Logo
7:47 am - 1:32 amONT-SJU
13h 45m2 stops
Frontier Logo
9:00 am - 11:50 pmSJU-ONT
18h 50m2 stops
$278Frontier
Find Deal
Sun, Nov 9 - Fri, Nov 14
United Airlines Logo
6:04 am - 8:38 pmONT-SJU
11h 34m1 stop
United Airlines Logo
2:55 pm - 9:24 pmSJU-ONT
9h 29m1 stop
$335United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
American Airlines Logo
10:20 am - 11:37 pmONT-SJU
10h 17m2 stops
American Airlines Logo
3:05 pm - 10:33 pmSJU-ONT
10h 28m1 stop
$339American Airlines
Find Deal
Sat, Sep 20 - Fri, Sep 26
United Airlines Logo
6:00 am - 9:26 pmONT-SJU
11h 26m1 stop
United Airlines Logo
2:05 am - 12:47 pmSJU-ONT
14h 42m2 stops
$358United Airlines
Find Deal
Tue, Jan 13 - Tue, Jan 27
American Airlines Logo
3:05 pm - 4:55 amONT-SJU
9h 50m1 stop
American Airlines Logo
12:45 pm - 8:24 pmSJU-ONT
11h 39m1 stop
$360American Airlines
Find Deal
Mon, Feb 16 - Thu, Feb 26
JetBlue Logo
10:56 pm - 2:56 pmONT-SJU
13h 00m1 stop
JetBlue Logo
1:29 pm - 9:29 pmSJU-ONT
11h 00m1 stop
$407JetBlue
Find Deal
Tue, Sep 16 - Fri, Sep 26
JetBlue Logo
10:56 pm - 2:56 pmONT-SJU
13h 00m1 stop
JetBlue Logo
1:29 pm - 9:29 pmSJU-ONT
11h 00m1 stop
$410JetBlue
Find Deal
Sat, Sep 20 - Fri, Sep 26
Southwest Logo
6:30 pm - 10:25 amONT-SJU
11h 55m2 stops
Southwest Logo
7:40 am - 4:00 pmSJU-ONT
12h 20m2 stops
$440Southwest
Find Deal
Tue, Nov 18 - Mon, Nov 24
Southwest Logo
10:30 am - 12:35 amONT-SJU
10h 05m2 stops
Southwest Logo
2:05 pm - 8:55 pmSJU-ONT
10h 50m2 stops
$475Southwest
Find Deal
Wed, Nov 12 - Mon, Nov 17

American Airlines flights from Ontario to Puerto Rico

Our best American Airlines deals on Ontario to Puerto Rico flight tickets
American Airlines
Sep 20
ONT10:20 amOntario
10h 17m
2 stops
SJU11:37 pmSan Juan Luis Munoz Marin Intl
Sep 26
SJU3:05 pmSan Juan Luis Munoz Marin Intl
10h 28m
1 stop
ONT10:33 pmOntario
$339
Find similar
American Airlines
Feb 16
ONT3:05 pmOntario
9h 50m
1 stop
SJU4:55 amSan Juan Luis Munoz Marin Intl
Feb 26
SJU12:45 pmSan Juan Luis Munoz Marin Intl
11h 39m
1 stop
ONT8:24 pmOntario
$360
Find similar
American Airlines
Sep 20
ONT10:20 amOntario
10h 17m
2 stops
SJU11:37 pmSan Juan Luis Munoz Marin Intl
Sep 26
SJU3:05 pmSan Juan Luis Munoz Marin Intl
10h 28m
1 stop
ONT10:33 pmOntario
$388
Find similar

JetBlue flights from Ontario to Puerto Rico

Our best JetBlue deals on Ontario to Puerto Rico flight tickets
JetBlue
Sep 16
ONT10:56 pmOntario
13h 00m
1 stop
SJU2:56 pmSan Juan Luis Munoz Marin Intl
Sep 26
SJU1:29 pmSan Juan Luis Munoz Marin Intl
11h 00m
1 stop
ONT9:29 pmOntario
$407
Find similar
JetBlue
Sep 20
ONT10:56 pmOntario
13h 00m
1 stop
SJU2:56 pmSan Juan Luis Munoz Marin Intl
Sep 26
SJU1:29 pmSan Juan Luis Munoz Marin Intl
11h 00m
1 stop
ONT9:29 pmOntario
$410
Find similar
JetBlue
Sep 27
ONT10:56 pmOntario
13h 00m
1 stop
SJU2:56 pmSan Juan Luis Munoz Marin Intl
Oct 15
SJU12:50 pmSan Juan Luis Munoz Marin Intl
11h 39m
1 stop
ONT9:29 pmOntario
$415
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated August 25, 2025.
Use the filters below to find and compare flights from Ontario to Puerto Rico that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 11/7

7:44 pm-5:54 pm

2 stops18h 10m

San Juan Luis Munoz Marin Intl

Fri 11/14

10:39 pm-12:37 pm

2 stops17h 58m

$251

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 11/9

7:47 am-1:32 am

2 stops13h 45m

San Juan Luis Munoz Marin Intl

Fri 11/14

9:00 am-11:50 pm

2 stops18h 50m

$278

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 9/23

6:04 am-8:38 pm

1 stop11h 34m

San Juan Luis Munoz Marin Intl

Tue 9/30

2:55 pm-9:24 pm

1 stop9h 29m

$335

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 9/20

10:20 am-11:37 pm

2 stops10h 17m

San Juan Luis Munoz Marin Intl

Fri 9/26

3:05 pm-10:33 pm

1 stop10h 28m

$339

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 1/13

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Tue 1/27

2:05 am-12:47 pm

2 stops14h 42m

$358

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 2/16

3:05 pm-4:55 am

1 stop9h 50m

San Juan Luis Munoz Marin Intl

Thu 2/26

12:45 pm-8:24 pm

1 stop11h 39m

$360

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 9/16

10:56 pm-2:56 pm

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Fri 9/26

1:29 pm-9:29 pm

1 stop11h 00m

$407

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 9/20

10:56 pm-2:56 pm

1 stop13h 00m

San Juan Luis Munoz Marin Intl

Fri 9/26

1:29 pm-9:29 pm

1 stop11h 00m

$410

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 11/18

6:30 pm-10:25 am

2 stops11h 55m

San Juan Luis Munoz Marin Intl

Mon 11/24

7:40 am-4:00 pm

2 stops12h 20m

$440

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 11/12

10:30 am-12:35 am

2 stops10h 05m

San Juan Luis Munoz Marin Intl

Mon 11/17

2:05 pm-8:55 pm

2 stops10h 50m

$475

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Puerto Rico from

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

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 April to fly from Ontario, when ticket prices are also cheap, with an average price of $484.

What is the cheapest day to depart on your flight to Puerto Rico?

On average, the least expensive day to fly to Puerto Rico from Ontario is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $413. However, this price may fluctuate depending on the airline, the season, and holidays. The most expensive day to fly to Puerto Rico is Thursday, with ticket prices averaging around $672.

What is the cheapest time of day to depart on your flight to Puerto Rico?

Our most recent data shows that the best time of day to fly to Puerto Rico is in the evening. Flights from Ontario to Puerto Rico during this time can be as low as $532. In contrast, the most expensive time of day to depart to Puerto Rico is in the afternoon when prices are around $735.

How far in advance should I book a flight 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 $598 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 $472 on momondo.

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

You could potentially save up to 40% 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

Direct flights

None
There are no direct flights from Ontario to Puerto Rico. There are no popular flight routes from Ontario to Puerto Rico.
Search flight deals

  • 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?

  • 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
FrontierPriceFrom $73Free CancellationRating
5.8
3,201 reviews
Search Frontier flights
DeltaPriceFrom $355Free CancellationRating
7.9
7,981 reviews
Search Delta flights
American AirlinesPriceFrom $364Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $366Free CancellationRating
7.4
8,940 reviews
Search United Airlines flights
SouthwestPriceFrom $409Free CancellationRating
8.0
4,243 reviews
Search Southwest 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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