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Cheap flights from Ontario to San Juan from $187

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 San Juan departing on 7/14. 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 San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
11:59 pm - 3:02 pm
ONT
-
SJU
12h 03m
1 stop
American Airlines Logo
7:05 pm - 9:29 am
SJU
-
ONT
17h 24m
2 stops
$374American Airlines
Fri, Sep 18 - Mon, Sep 21
American Airlines Logo
11:03 pm - 2:45 pm
ONT
-
SJU
12h 42m
1 stop
American Airlines Logo
7:05 pm - 9:29 am
SJU
-
ONT
17h 24m
2 stops
$414American Airlines
Fri, Sep 18 - Mon, Sep 21
American Airlines Logo
8:01 pm - 2:38 pm
ONT
-
SJU
15h 37m
2 stops
American Airlines Logo
6:51 am - 6:15 pm
SJU
-
ONT
14h 24m
2 stops
$425American Airlines
Sun, Aug 23 - Fri, Aug 28
Delta Logo
10:00 pm - 11:46 am
ONT
-
SJU
10h 46m
1 stop
Delta Logo
2:11 pm - 11:34 pm
SJU
-
ONT
12h 23m
2 stops
$427Delta
Fri, Jul 31 - Thu, Aug 6
United Airlines Logo
5:00 am - 5:38 pm
ONT
-
SJU
9h 38m
1 stop
United Airlines Logo
7:00 am - 8:04 pm
SJU
-
ONT
16h 04m
2 stops
$428United Airlines
Mon, Aug 10 - Tue, Aug 18
Southwest Logo
6:20 am - 8:05 pm
ONT
-
SJU
10h 45m
2 stops
Southwest Logo
5:00 am - 3:15 pm
SJU
-
ONT
13h 15m
2 stops
$452Southwest
Thu, Aug 20 - Mon, Aug 24
American Airlines Logo
11:59 pm - 2:54 pm
ONT
-
SJU
11h 55m
1 stop
American Airlines Logo
3:44 pm - 10:58 pm
SJU
-
ONT
10h 14m
1 stop
$454American Airlines
Mon, Aug 10 - Tue, Aug 18
Multiple Airlines Logo
11:50 pm - 1:58 pm
ONT
-
SJU
11h 08m
1 stop
Multiple Airlines Logo
6:25 am - 4:48 pm
SJU
-
ONT
13h 23m
1 stop
$463Multiple Airlines
Mon, Aug 17 - Sat, Aug 22
United Airlines Logo
5:00 am - 5:38 pm
ONT
-
SJU
9h 38m
1 stop
United Airlines Logo
2:20 pm - 9:59 pm
SJU
-
ONT
10h 39m
1 stop
$464United Airlines
Sat, Aug 22 - Wed, Aug 26
Delta Logo
10:00 pm - 11:46 am
ONT
-
SJU
10h 46m
1 stop
Delta Logo
12:56 pm - 9:52 pm
SJU
-
ONT
11h 56m
1 stop
$465Delta
Fri, Jul 31 - Thu, Aug 6

JetBlue flights from Ontario to San Juan Luis Munoz Marin Intl Airport

Our best JetBlue deals on Ontario to San Juan Luis Munoz Marin Intl Airport flight tickets
JetBlue
Jun 2
ONT10:41 pmOntario
13h 49m
1 stop
SJU3:30 pmSan Juan Luis Munoz Marin Intl
Jun 5
SJU9:52 amSan Juan Luis Munoz Marin Intl
13h 55m
1 stop
ONT8:47 pmOntario
$538
JetBlue
Jun 1
ONT10:41 pmOntario
11h 35m
1 stop
SJU1:16 pmSan Juan Luis Munoz Marin Intl
Jun 5
SJU3:28 amSan Juan Luis Munoz Marin Intl
20h 19m
1 stop
ONT8:47 pmOntario
$590
JetBlue
May 26
ONT10:41 pmOntario
13h 49m
1 stop
SJU3:30 pmSan Juan Luis Munoz Marin Intl
May 29
SJU9:52 amSan Juan Luis Munoz Marin Intl
13h 55m
1 stop
ONT8:47 pmOntario
$622

American Airlines flights from Ontario to San Juan Luis Munoz Marin Intl Airport

Our best American Airlines deals on Ontario to San Juan Luis Munoz Marin Intl Airport flight tickets
American Airlines
Sep 18
ONT11:59 pmOntario
12h 03m
1 stop
SJU3:02 pmSan Juan Luis Munoz Marin Intl
Sep 21
SJU7:05 pmSan Juan Luis Munoz Marin Intl
17h 24m
2 stops
ONT9:29 amOntario
$374
American Airlines
Sep 18
ONT11:03 pmOntario
12h 42m
1 stop
SJU2:45 pmSan Juan Luis Munoz Marin Intl
Sep 21
SJU7:05 pmSan Juan Luis Munoz Marin Intl
17h 24m
2 stops
ONT9:29 amOntario
$414
American Airlines
Aug 23
ONT8:01 pmOntario
15h 37m
2 stops
SJU2:38 pmSan Juan Luis Munoz Marin Intl
Aug 28
SJU6:51 amSan Juan Luis Munoz Marin Intl
14h 24m
2 stops
ONT6:15 pmOntario
$425

momondo Fare Finder

 
Customize your flight search to find flights from Ontario to San Juan Luis Munoz Marin Intl Airport 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 May 12, 2026.
Use the filters below to find and compare flights from Ontario to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 9/18

11:59 pm-3:02 pm

1 stop12h 03m

San Juan Luis Munoz Marin Intl

Mon 9/21

7:05 pm-9:29 am

2 stops17h 24m

$374

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 9/18

11:03 pm-2:45 pm

1 stop12h 42m

San Juan Luis Munoz Marin Intl

Mon 9/21

7:05 pm-9:29 am

2 stops17h 24m

$414

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 8/23

8:01 pm-2:38 pm

2 stops15h 37m

San Juan Luis Munoz Marin Intl

Fri 8/28

6:51 am-6:15 pm

2 stops14h 24m

$425

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 7/31

10:00 pm-11:46 am

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Thu 8/6

2:11 pm-11:34 pm

2 stops12h 23m

$427

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 8/10

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

Tue 8/18

7:00 am-8:04 pm

2 stops16h 04m

$428

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 8/20

6:20 am-8:05 pm

2 stops10h 45m

San Juan Luis Munoz Marin Intl

Mon 8/24

5:00 am-3:15 pm

2 stops13h 15m

$452

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 8/10

11:59 pm-2:54 pm

1 stop11h 55m

San Juan Luis Munoz Marin Intl

Tue 8/18

3:44 pm-10:58 pm

1 stop10h 14m

$454

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 8/17

11:50 pm-1:58 pm

1 stop11h 08m

San Juan Luis Munoz Marin Intl

Sat 8/22

6:25 am-4:48 pm

1 stop13h 23m

$463
Quickest round-trip

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 8/22

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

Wed 8/26

2:20 pm-9:59 pm

1 stop10h 39m

$464

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 7/31

10:00 pm-11:46 am

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Thu 8/6

12:56 pm-9:52 pm

1 stop11h 56m

$465

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 San Juan from

How to get the cheapest flight ticket from Ontario to San Juan Luis Munoz Marin Intl Airport

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 typical price of a round-trip flight between Ontario and San Juan Luis Munoz Marin Intl Airport?

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of October, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $485.

How far in advance should I book a flight from Ontario to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around $551 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Ontario for as low as $452 on momondo.

Can stopping save me money on Ontario to San Juan Luis Munoz Marin Intl Airport flights?

You could potentially save up to 4% on your flight if you consider stops on a Ontario to San Juan Luis Munoz Marin Intl Airport flight.

How have Ontario to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of May 2026, prices for Ontario to San Juan Luis Munoz Marin Intl Airport flights are approximately 15% cheaper when compared to flights at the same time last year.

When to book flights from Ontario to San Juan Luis Munoz Marin Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Ontario to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Ontario to San Juan Luis Munoz Marin Intl Airport (ONT to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ontario to San Juan Luis Munoz Marin Intl Airport

Fastest flight time

9h 38m

Direct flights

None
The fastest flight from Ontario to San Juan Luis Munoz Marin Intl Airport takes 9h 38m
There are no direct flights from Ontario to San Juan Luis Munoz Marin Intl Airport. There are no popular flight routes from Ontario to San Juan Luis Munoz Marin Intl Airport.
Search flight deals

Frequently asked questions about flying from Ontario to San Juan Luis Munoz Marin Intl Airport

  • How far is Ontario to San Juan Luis Munoz Marin Intl by plane?

    A flight from Ontario to San Juan Luis Munoz Marin Intl will travel around 3337.2 mi. Typically, this will take 9h 38m by plane in normal conditions.

  • When did momondo last update prices for flights from Ontario Airport to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from Ontario Airport to San Juan Luis Munoz Marin Intl Airport are updated daily.

  • How many operators does momondo search for flights from Ontario Airport to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from Ontario Airport to San Juan Luis Munoz Marin Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Ontario Airport to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The necessary travel and health documents for your San Juan Luis Munoz Marin Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Ontario to San Juan Luis Munoz Marin Intl Airport?

Best airlines flying from Ontario to San Juan Luis Munoz Marin Intl Airport

Compare and see reviews for airlines that fly from Ontario to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $137Free CancellationRating
5.6
2,952 reviews
Search Frontier flights
DeltaPriceFrom $292Free CancellationRating
7.9
8,447 reviews
Search Delta flights
United AirlinesPriceFrom $321Free CancellationRating
7.4
9,701 reviews
Search United Airlines flights
American AirlinesPriceFrom $360Free CancellationRating
7.1
11,661 reviews
Search American Airlines flights
SouthwestPriceFrom $419Free CancellationRating
8.0
4,295 reviews
Search Southwest flights
JetBluePriceFrom $455Free CancellationRating
7.1
2,974 reviews
Search JetBlue flights

Traveling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Fajardo
Dorado
Luquillo
Rio Grande
Humacao
Caguas
Bayamón

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to San Juan?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ontario to San Juan. momondo saves you time and could save you money on your trip.

Can I find flights from Ontario to San Juan with flexible booking policies on momondo?

Yes. All flights to San Juan 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 San Juan?

Once you have performed a search for Ontario to San Juan flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Ontario to San Juan flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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