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Cheap flights from Ontario to Puerto Rico from $140

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 2/14. 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

Enter your travel dates to find the best prices.
United Airlines Logo
5:05 am - 5:38 pm
ONT
-
SJU
9h 33m
1 stop
United Airlines Logo
1:40 pm - 9:01 pm
SJU
-
ONT
10h 21m
1 stop
$284United Airlines
Thu, May 7 - Tue, May 12
JetBlue Logo
11:25 pm - 1:29 pm
ONT
-
SJU
11h 04m
1 stop
JetBlue Logo
1:50 pm - 10:09 pm
SJU
-
ONT
11h 19m
1 stop
$285JetBlue
Mon, May 18 - Sat, May 23
Multiple Airlines Logo
6:00 am - 1:05 am
ONT
-
SJU
39h 05m
2 stops
Multiple Airlines Logo
7:44 pm - 8:48 pm
SJU
-
ONT
29h 04m
1 stop
$303Multiple Airlines
Fri, Feb 20 - Thu, Feb 26
American Airlines Logo
5:02 pm - 10:00 am
ONT
-
SJU
12h 58m
2 stops
American Airlines Logo
6:00 am - 6:42 pm
SJU
-
ONT
15h 42m
2 stops
$304American Airlines
Wed, Feb 25 - Tue, Mar 10
Multiple Airlines Logo
2:06 pm - 11:37 am
ONT
-
SJU
17h 31m
1 stop
Multiple Airlines Logo
6:39 pm - 11:59 pm
SJU
-
ONT
32h 20m
2 stops
$308Multiple Airlines
Thu, Feb 26 - Wed, Mar 11
United Airlines Logo
6:05 am - 8:38 pm
ONT
-
SJU
11h 33m
1 stop
United Airlines Logo
7:20 am - 9:01 pm
SJU
-
ONT
16h 41m
2 stops
$311United Airlines
Sat, May 9 - Sat, May 16
Multiple Airlines Logo
8:21 am - 11:37 am
ONT
-
SJU
23h 16m
1 stop
Multiple Airlines Logo
6:30 am - 11:59 pm
SJU
-
ONT
44h 29m
2 stops
$363Multiple Airlines
Sat, Feb 21 - Sun, Mar 8
United Airlines Logo
5:05 am - 9:24 pm
ONT
-
SJU
13h 19m
2 stops
United Airlines Logo
1:00 am - 12:37 pm
SJU
-
ONT
14h 37m
2 stops
$370United Airlines
Sat, May 9 - Fri, May 15
American Airlines Logo
11:59 pm - 6:22 pm
ONT
-
SJU
14h 23m
2 stops
American Airlines Logo
7:00 am - 6:20 pm
SJU
-
ONT
15h 20m
2 stops
$372American Airlines
Fri, Feb 6 - Tue, Feb 10
United Airlines Logo
6:00 am - 9:26 pm
ONT
-
SJU
11h 26m
1 stop
United Airlines Logo
2:25 pm - 8:50 pm
SJU
-
ONT
10h 25m
1 stop
$374United Airlines
Sat, Feb 21 - Wed, Feb 25

JetBlue flights from Ontario to Puerto Rico

Our best JetBlue deals on Ontario to Puerto Rico flight tickets
JetBlue
May 18
ONT11:25 pmOntario
11h 04m
1 stop
SJU1:29 pmSan Juan Luis Munoz Marin Intl
May 23
SJU1:50 pmSan Juan Luis Munoz Marin Intl
11h 19m
1 stop
ONT10:09 pmOntario
$285
JetBlue
Jul 11
ONT11:25 pmOntario
10h 24m
1 stop
SJU12:49 pmSan Juan Luis Munoz Marin Intl
Jul 15
SJU1:50 pmSan Juan Luis Munoz Marin Intl
11h 19m
1 stop
ONT10:09 pmOntario
$385
JetBlue
May 25
ONT11:25 pmOntario
11h 22m
1 stop
SJU1:47 pmSan Juan Luis Munoz Marin Intl
May 31
SJU1:50 pmSan Juan Luis Munoz Marin Intl
11h 19m
1 stop
ONT10:09 pmOntario
$434

United Airlines flights from Ontario to Puerto Rico

Our best United Airlines deals on Ontario to Puerto Rico flight tickets
United Airlines
May 7
ONT5:05 amOntario
9h 33m
1 stop
SJU5:38 pmSan Juan Luis Munoz Marin Intl
May 12
SJU1:40 pmSan Juan Luis Munoz Marin Intl
10h 21m
1 stop
ONT9:01 pmOntario
$284
United Airlines
May 9
ONT6:05 amOntario
11h 33m
1 stop
SJU8:38 pmSan Juan Luis Munoz Marin Intl
May 16
SJU7:20 amSan Juan Luis Munoz Marin Intl
16h 41m
2 stops
ONT9:01 pmOntario
$311
United Airlines
May 9
ONT5:05 amOntario
13h 19m
2 stops
SJU9:24 pmSan Juan Luis Munoz Marin Intl
May 15
SJU1:00 amSan Juan Luis Munoz Marin Intl
14h 37m
2 stops
ONT12:37 pmOntario
$370

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 January 14, 2026.
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

Thu 5/7

5:05 am-5:38 pm

1 stop9h 33m

San Juan Luis Munoz Marin Intl

Tue 5/12

1:40 pm-9:01 pm

1 stop10h 21m

$284

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 5/18

11:25 pm-1:29 pm

1 stop11h 04m

San Juan Luis Munoz Marin Intl

Sat 5/23

1:50 pm-10:09 pm

1 stop11h 19m

$285

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 2/20

6:00 am-1:05 am

2 stops39h 05m

San Juan Luis Munoz Marin Intl

Thu 2/26

7:44 pm-8:48 pm

1 stop29h 04m

$303

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 2/25

5:02 pm-10:00 am

2 stops12h 58m

San Juan Luis Munoz Marin Intl

Tue 3/10

6:00 am-6:42 pm

2 stops15h 42m

$304

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 2/26

2:06 pm-11:37 am

1 stop17h 31m

San Juan Luis Munoz Marin Intl

Wed 3/11

6:39 pm-11:59 pm

2 stops32h 20m

$308

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/9

6:05 am-8:38 pm

1 stop11h 33m

San Juan Luis Munoz Marin Intl

Sat 5/16

7:20 am-9:01 pm

2 stops16h 41m

$311

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 2/21

8:21 am-11:37 am

1 stop23h 16m

San Juan Luis Munoz Marin Intl

Sun 3/8

6:30 am-11:59 pm

2 stops44h 29m

$363

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/9

5:05 am-9:24 pm

2 stops13h 19m

San Juan Luis Munoz Marin Intl

Fri 5/15

1:00 am-12:37 pm

2 stops14h 37m

$370

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 2/6

11:59 pm-6:22 pm

2 stops14h 23m

San Juan Luis Munoz Marin Intl

Tue 2/10

7:00 am-6:20 pm

2 stops15h 20m

$372

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

2:25 pm-8:50 pm

1 stop10h 25m

$374

Flights are sorted by cheapest round-trip flights 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 $477.

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 $577 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 $460 on momondo.

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

You could potentially save up to 33% 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

Fastest flight time

9h 20m

Direct flights

None
The fastest flight from Ontario to Puerto Rico takes 9h 20m
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
5.7
3,056 reviews
Search Frontier flights
United AirlinesPriceFrom $328Free CancellationRating
7.4
9,163 reviews
Search United Airlines flights
DeltaPriceFrom $355Free CancellationRating
7.9
8,048 reviews
Search Delta flights
American AirlinesPriceFrom $365Free CancellationRating
7.2
11,129 reviews
Search American Airlines flights
SouthwestPriceFrom $480Free CancellationRating
8.0
4,258 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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