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Cheap flights from Ontario to San Juan from $171

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
2:22 pm - 11:31 amONT  Ontario-SJU San Juan Luis Munoz Marin Intl
18h 09m2 stops Dallas/Fort Worth Miami
American Airlines Logo
6:30 am - 3:16 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
11h 46m2 stops Miami Phoenix Sky Harbor Intl
$342American Airlines
Tue, Oct 13 - Tue, Oct 27
American Airlines Logo
11:59 pm - 3:23 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
12h 24m1 stop Dallas/Fort Worth
American Airlines Logo
6:00 am - 9:11 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
18h 11m1 stop Dallas/Fort Worth
$342American Airlines
Sat, Oct 24 - Sat, Oct 31
Southwest Logo
12:05 pm - 1:20 amONT  Ontario-SJU San Juan Luis Munoz Marin Intl
10h 15m2 stops Austin Bergstrom Orlando
Southwest Logo
5:00 am - 2:25 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
12h 25m2 stops Orlando Denver Intl
$434Southwest
Thu, Oct 1 - Mon, Oct 5
Southwest Logo
6:50 pm - 11:50 amONT  Ontario-SJU San Juan Luis Munoz Marin Intl
13h 00m2 stops Las Vegas Harry Reid Intl Orlando
Southwest Logo
5:40 am - 3:00 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
13h 20m2 stops Orlando Nashville Intl
$434Southwest
Sun, Nov 1 - Sat, Nov 7
Frontier Logo
11:45 am - 10:53 amONT  Ontario-SJU San Juan Luis Munoz Marin Intl
20h 08m2 stops Denver Intl Miami
Frontier Logo
12:59 am - 4:46 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
18h 47m2 stops Philadelphia Dallas/Fort Worth
$435Frontier
Sat, Sep 26 - Mon, Sep 28
United Airlines Logo
5:00 am - 5:38 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
9h 38m1 stop Denver Intl
United Airlines Logo
1:00 am - 12:46 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
14h 46m2 stops Newark Denver Intl
$452United Airlines
Thu, Oct 1 - Sun, Oct 4
United Airlines Logo
5:00 am - 5:38 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
9h 38m1 stop Denver Intl
United Airlines Logo
2:00 pm - 8:58 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
9h 58m1 stop Denver Intl
$474United Airlines
Thu, Oct 1 - Mon, Oct 5
Frontier Logo
11:45 am - 10:53 amONT  Ontario-SJU San Juan Luis Munoz Marin Intl
20h 08m2 stops Denver Intl Miami
Frontier Logo
3:00 am - 11:50 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
23h 50m2 stops Orlando Denver Intl
$477Frontier
Sat, Oct 3 - Fri, Oct 9
Delta Logo
7:00 am - 11:50 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
12h 50m1 stop Atlanta Hartsfield-Jackson
Delta Logo
2:15 pm - 10:14 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
11h 59m1 stop Atlanta Hartsfield-Jackson
$735Delta
Mon, Jan 25 - Sat, Jan 30
Delta Logo
7:00 am - 9:00 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
10h 00m1 stop Atlanta Hartsfield-Jackson
Delta Logo
3:55 pm - 10:14 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
10h 19m1 stop Atlanta Hartsfield-Jackson
$891Delta
Sun, Jan 24 - Sat, Jan 30

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

Our best United Airlines deals on Ontario to San Juan Luis Munoz Marin Intl Airport flight tickets
United Airlines
Oct 1
ONT5:00 amOntario
9h 38m
1 stop
SJU5:38 pmSan Juan Luis Munoz Marin Intl
Oct 4
SJU1:00 amSan Juan Luis Munoz Marin Intl
14h 46m
2 stops
ONT12:46 pmOntario
$452
United Airlines
Sep 20
ONT7:13 pmOntario
15h 32m
2 stops
SJU1:45 pmSan Juan Luis Munoz Marin Intl
Sep 25
SJU2:00 pmSan Juan Luis Munoz Marin Intl
9h 58m
1 stop
ONT8:58 pmOntario
$492
United Airlines
Dec 9
ONT5:00 amOntario
9h 25m
1 stop
SJU6:25 pmSan Juan Luis Munoz Marin Intl
Dec 18
SJU3:46 pmSan Juan Luis Munoz Marin Intl
10h 25m
1 stop
ONT10:11 pmOntario
$507

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

Our best Southwest deals on Ontario to San Juan Luis Munoz Marin Intl Airport flight tickets
Southwest
Dec 9
ONT5:55 amOntario
12h 25m
2 stops
SJU10:20 pmSan Juan Luis Munoz Marin Intl
Dec 18
SJU5:35 amSan Juan Luis Munoz Marin Intl
12h 20m
2 stops
ONT1:55 pmOntario
$454
Southwest
Sep 16
ONT8:35 amOntario
10h 30m
2 stops
SJU10:05 pmSan Juan Luis Munoz Marin Intl
Sep 21
SJU6:30 amSan Juan Luis Munoz Marin Intl
12h 00m
2 stops
ONT3:30 pmOntario
$529
Southwest
Oct 8
ONT8:40 amOntario
10h 15m
2 stops
SJU9:55 pmSan Juan Luis Munoz Marin Intl
Oct 24
SJU10:30 amSan Juan Luis Munoz Marin Intl
10h 45m
2 stops
ONT6:15 pmOntario
$535

momondo Fare Finder

 
Use the filters below to find and compare flights from Ontario to San Juan Luis Munoz Marin Intl Airport that are best for you.

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Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Tue 10/13

2:22 pm-11:31 am

2 stops18h 09m

San Juan Luis Munoz Marin Intl

Tue 10/27

6:30 am-3:16 pm

2 stops11h 46m

$342

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sat 10/24

11:59 pm-3:23 pm

1 stop12h 24m

San Juan Luis Munoz Marin Intl

Sat 10/31

6:00 am-9:11 pm

1 stop18h 11m

$342

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 10/1

12:05 pm-1:20 am

2 stops10h 15m

San Juan Luis Munoz Marin Intl

Mon 10/5

5:00 am-2:25 pm

2 stops12h 25m

$434

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 11/1

6:50 pm-11:50 am

2 stops13h 00m

San Juan Luis Munoz Marin Intl

Sat 11/7

5:40 am-3:00 pm

2 stops13h 20m

$434

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sat 9/26

11:45 am-10:53 am

2 stops20h 08m

San Juan Luis Munoz Marin Intl

Mon 9/28

12:59 am-4:46 pm

2 stops18h 47m

$435

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 10/1

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

Sun 10/4

1:00 am-12:46 pm

2 stops14h 46m

$452
Quickest round-trip

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 10/1

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

Mon 10/5

2:00 pm-8:58 pm

1 stop9h 58m

$474

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sat 10/3

11:45 am-10:53 am

2 stops20h 08m

San Juan Luis Munoz Marin Intl

Fri 10/9

3:00 am-11:50 pm

2 stops23h 50m

$477

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Mon 1/25

7:00 am-11:50 pm

1 stop12h 50m

San Juan Luis Munoz Marin Intl

Sat 1/30

2:15 pm-10:14 pm

1 stop11h 59m

$735

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 1/24

7:00 am-9:00 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

Sat 1/30

3:55 pm-10:14 pm

1 stop10h 19m

$891

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?

Prices are currently low for flights on this route.

Typical prices usually range from $467 to $675.
The lowest price recently found on this route was $342.

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 August is also cheap. Prices for this month can be found on momondo for an average of $456.

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 $570 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 $429 on momondo.

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

You could potentially save up to 36% 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 September 2026, prices for Ontario to San Juan Luis Munoz Marin Intl Airport flights are approximately 8% 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

Best Price Found

$171

Fastest flight time

9h 25m

Direct flights

None
The best one-way flight to San Juan Luis Munoz Marin Intl Airport from Ontario in the past 72 hours is $171. The best round-trip flight deal from Ontario to San Juan Luis Munoz Marin Intl Airport found on momondo in the last 72 hours is $342.
The fastest flight from Ontario to San Juan Luis Munoz Marin Intl Airport takes 9h 25m
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 25m 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
DeltaPriceFrom $168Free CancellationRating
7.8
8,570 reviews
Search Delta flights
United AirlinesPriceFrom $318Free CancellationRating
7.4
10,174 reviews
Search United Airlines flights
American AirlinesPriceFrom $376Free CancellationRating
7.1
12,050 reviews
Search American Airlines flights
SouthwestPriceFrom $419Free CancellationRating
8.0
4,202 reviews
Search Southwest flights
JetBluePriceFrom $460Free CancellationRating
7.1
3,046 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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