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Cheap flights from Ontario to Puerto Rico from $178

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 3/10. 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.
Frontier Logo
8:34 am - 2:30 amONT-SJU
14h 56m2 stops
Frontier Logo
9:00 am - 11:50 pmSJU-ONT
17h 50m2 stops
$251Frontier
Find Deal
Sat, Oct 25 - Wed, Oct 29
Frontier Logo
6:53 am - 2:30 amONT-SJU
16h 37m2 stops
Frontier Logo
3:59 am - 6:49 pmSJU-ONT
18h 50m2 stops
$346Frontier
Find Deal
Wed, Oct 22 - Sun, Nov 2
American Airlines Logo
2:53 pm - 6:10 amONT-SJU
11h 17m1 stop
American Airlines Logo
8:20 am - 7:41 pmSJU-ONT
15h 21m1 stop
$350American Airlines
Find Deal
Sun, Nov 2 - Mon, Nov 3
American Airlines Logo
10:34 pm - 8:48 pmONT-SJU
18h 14m1 stop
American Airlines Logo
6:25 am - 6:20 pmSJU-ONT
15h 55m2 stops
$355American Airlines
Find Deal
Sun, Nov 9 - Sat, Nov 15
Delta Logo
10:30 pm - 11:53 amONT-SJU
9h 23m1 stop
Delta Logo
3:30 pm - 9:14 pmSJU-ONT
9h 44m1 stop
$414Delta
Find Deal
Fri, Jan 30 - Thu, Feb 5
United Airlines Logo
6:00 am - 9:22 pmONT-SJU
12h 22m2 stops
United Airlines Logo
1:05 am - 12:33 pmSJU-ONT
14h 28m2 stops
$415United Airlines
Find Deal
Tue, Mar 24 - Mon, Mar 30
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
$438United Airlines
Find Deal
Fri, Jan 30 - Wed, Feb 4
Delta Logo
10:30 pm - 12:00 pmONT-SJU
10h 30m1 stop
Delta Logo
6:15 am - 11:52 pmSJU-ONT
20h 37m2 stops
$455Delta
Find Deal
Tue, Mar 24 - Tue, Mar 31
Southwest Logo
6:00 am - 7:30 pmONT-SJU
10h 30m2 stops
Southwest Logo
10:10 am - 8:20 pmSJU-ONT
13h 10m2 stops
$463Southwest
Find Deal
Tue, Mar 24 - Tue, Mar 31
Southwest Logo
9:55 am - 12:35 amONT-SJU
10h 40m2 stops
Southwest Logo
7:40 am - 4:00 pmSJU-ONT
12h 20m2 stops
$521Southwest
Find Deal
Wed, Nov 5 - Sun, Nov 9

Frontier flights from Ontario to Puerto Rico

Our best Frontier deals on Ontario to Puerto Rico flight tickets
Frontier
Oct 25
ONT8:34 amOntario
14h 56m
2 stops
SJU2:30 amSan Juan Luis Munoz Marin Intl
Oct 29
SJU9:00 amSan Juan Luis Munoz Marin Intl
17h 50m
2 stops
ONT11:50 pmOntario
$251
Find similar
Frontier
Oct 22
ONT6:53 amOntario
16h 37m
2 stops
SJU2:30 amSan Juan Luis Munoz Marin Intl
Nov 2
SJU3:59 amSan Juan Luis Munoz Marin Intl
18h 50m
2 stops
ONT6:49 pmOntario
$346
Find similar
Frontier
Jan 7
ONT7:30 amOntario
19h 04m
2 stops
SJU6:34 amSan Juan Luis Munoz Marin Intl
Jan 11
SJU3:55 amSan Juan Luis Munoz Marin Intl
14h 36m
2 stops
ONT2:31 pmOntario
$351
Find similar

American Airlines flights from Ontario to Puerto Rico

Our best American Airlines deals on Ontario to Puerto Rico flight tickets
American Airlines
Nov 2
ONT2:53 pmOntario
11h 17m
1 stop
SJU6:10 amSan Juan Luis Munoz Marin Intl
Nov 3
SJU8:20 amSan Juan Luis Munoz Marin Intl
15h 21m
1 stop
ONT7:41 pmOntario
$350
Find similar
American Airlines
Nov 9
ONT10:34 pmOntario
18h 14m
1 stop
SJU8:48 pmSan Juan Luis Munoz Marin Intl
Nov 15
SJU6:25 amSan Juan Luis Munoz Marin Intl
15h 55m
2 stops
ONT6:20 pmOntario
$355
Find similar
American Airlines
Nov 3
ONT4:47 pmOntario
13h 30m
2 stops
SJU10:17 amSan Juan Luis Munoz Marin Intl
Nov 10
SJU8:20 amSan Juan Luis Munoz Marin Intl
15h 21m
1 stop
ONT7:41 pmOntario
$406
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 October 9, 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

Sat 10/25

8:34 am-2:30 am

2 stops14h 56m

San Juan Luis Munoz Marin Intl

Wed 10/29

9:00 am-11:50 pm

2 stops17h 50m

$251

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 10/22

6:53 am-2:30 am

2 stops16h 37m

San Juan Luis Munoz Marin Intl

Sun 11/2

3:59 am-6:49 pm

2 stops18h 50m

$346

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 11/2

2:53 pm-6:10 am

1 stop11h 17m

San Juan Luis Munoz Marin Intl

Mon 11/3

8:20 am-7:41 pm

1 stop15h 21m

$350

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 11/9

10:34 pm-8:48 pm

1 stop18h 14m

San Juan Luis Munoz Marin Intl

Sat 11/15

6:25 am-6:20 pm

2 stops15h 55m

$355

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 1/30

10:30 pm-11:53 am

1 stop9h 23m

San Juan Luis Munoz Marin Intl

Thu 2/5

3:30 pm-9:14 pm

1 stop9h 44m

$414

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 3/24

6:00 am-9:22 pm

2 stops12h 22m

San Juan Luis Munoz Marin Intl

Mon 3/30

1:05 am-12:33 pm

2 stops14h 28m

$415

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 1/30

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Wed 2/4

2:05 am-12:47 pm

2 stops14h 42m

$438

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 3/24

10:30 pm-12:00 pm

1 stop10h 30m

San Juan Luis Munoz Marin Intl

Tue 3/31

6:15 am-11:52 pm

2 stops20h 37m

$455

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 3/24

6:00 am-7:30 pm

2 stops10h 30m

San Juan Luis Munoz Marin Intl

Tue 3/31

10:10 am-8:20 pm

2 stops13h 10m

$463

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 11/5

9:55 am-12:35 am

2 stops10h 40m

San Juan Luis Munoz Marin Intl

Sun 11/9

7:40 am-4:00 pm

2 stops12h 20m

$521

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 $478.

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 $593 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 $464 on momondo.

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

You could potentially save up to 37% 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
3,143 reviews
Search Frontier flights
DeltaPriceFrom $355Free CancellationRating
7.9
7,969 reviews
Search Delta flights
American AirlinesPriceFrom $365Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights
United AirlinesPriceFrom $373Free CancellationRating
7.4
8,968 reviews
Search United Airlines flights
SouthwestPriceFrom $409Free CancellationRating
8.0
4,237 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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