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Cheap flights from Ontario to San Juan from $178

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.
Frontier Logo
5:07 pm - 10:15 amONT  Ontario-SJU San Juan Luis Munoz Marin Intl
13h 08m2 stops Las Vegas Harry Reid Intl Orlando
Frontier Logo
2:20 pm - 8:30 amSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
22h 10m2 stops Philadelphia Las Vegas Harry Reid Intl
$344Frontier
Sat, Nov 14 - Sat, Nov 21
Frontier Logo
8:44 am - 1:58 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
25h 14m2 stops Las Vegas Harry Reid Intl Orlando
Frontier Logo
5:01 am - 10:17 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
21h 16m2 stops Atlanta Hartsfield-Jackson Denver Intl
$398Frontier
Sat, Dec 5 - Wed, Dec 9
American Airlines Logo
6:00 am - 11:54 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
13h 54m1 stop Dallas/Fort Worth
American Airlines Logo
1:18 pm - 11:16 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
13h 58m2 stops Miami Chicago O'Hare Intl
$458American Airlines
Sun, Jan 17 - Thu, Jan 21
American Airlines Logo
6:20 am - 11:54 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
13h 34m2 stops Phoenix Sky Harbor Intl Dallas/Fort Worth
American Airlines Logo
1:18 pm - 10:15 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
12h 57m2 stops Miami Phoenix Sky Harbor Intl
$458American Airlines
Sun, Jan 17 - Thu, Jan 21
Delta Logo
7:00 am - 11:50 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
12h 50m1 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
$494Delta
Mon, Jan 11 - Thu, Jan 21
United Airlines Logo
5:00 am - 6:25 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
9h 25m1 stop Denver Intl
United Airlines Logo
8:25 am - 8:19 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
15h 54m2 stops Chicago O'Hare Intl San Francisco
$506United Airlines
Thu, Mar 4 - Wed, Mar 10
United Airlines Logo
6:00 am - 9:24 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
11h 24m1 stop Houston George Bush Intcntl
United Airlines Logo
3:46 pm - 9:40 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
9h 54m1 stop Houston George Bush Intcntl
$518United Airlines
Sun, Nov 15 - Wed, Nov 18
Southwest Logo
7:30 am - 9:40 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
11h 10m2 stops Phoenix Sky Harbor Intl Tampa
Southwest Logo
9:20 pm - 11:10 amSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
16h 50m2 stops Orlando Dallas Love Field
$534Southwest
Wed, Apr 21 - Sun, Apr 25
Southwest Logo
9:05 am - 11:40 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
10h 35m2 stops Nashville Intl Orlando
Southwest Logo
11:25 am - 7:45 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
12h 20m2 stops Orlando Phoenix Sky Harbor Intl
$552Southwest
Thu, Mar 4 - Wed, Mar 10
Delta Logo
12:00 pm - 11:19 pmONT  Ontario-SJU San Juan Luis Munoz Marin Intl
8h 19m1 stop Atlanta Hartsfield-Jackson
Delta Logo
2:45 pm - 10:14 pmSJU  San Juan Luis Munoz Marin Intl-ONT Ontario
10h 29m1 stop Atlanta Hartsfield-Jackson
$992Delta
Sat, Mar 27 - Wed, Apr 7

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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
Nov 10
ONT7:00 amOntario
13h 16m
1 stop
SJU12:16 amSan Juan Luis Munoz Marin Intl
Nov 18
SJU7:30 amSan Juan Luis Munoz Marin Intl
12h 49m
2 stops
ONT4:19 pmOntario
$458
American Airlines
Feb 6
ONT4:19 pmOntario
16h 09m
2 stops
SJU12:28 pmSan Juan Luis Munoz Marin Intl
Feb 13
SJU1:20 amSan Juan Luis Munoz Marin Intl
14h 41m
1 stop
ONT12:01 pmOntario
$476
American Airlines
Feb 6
ONT6:00 amOntario
13h 54m
1 stop
SJU11:54 pmSan Juan Luis Munoz Marin Intl
Feb 13
SJU1:20 amSan Juan Luis Munoz Marin Intl
12h 22m
1 stop
ONT9:42 amOntario
$494

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
Nov 15
ONT6:00 amOntario
11h 24m
1 stop
SJU9:24 pmSan Juan Luis Munoz Marin Intl
Nov 18
SJU3:46 pmSan Juan Luis Munoz Marin Intl
9h 54m
1 stop
ONT9:40 pmOntario
$518
United Airlines
Mar 4
ONT5:00 amOntario
9h 25m
1 stop
SJU6:25 pmSan Juan Luis Munoz Marin Intl
Mar 10
SJU2:21 pmSan Juan Luis Munoz Marin Intl
10h 11m
1 stop
ONT8:32 pmOntario
$532
United Airlines
Mar 10
ONT5:00 amOntario
9h 25m
1 stop
SJU6:25 pmSan Juan Luis Munoz Marin Intl
Mar 22
SJU1:05 amSan Juan Luis Munoz Marin Intl
17h 22m
2 stops
ONT3:27 pmOntario
$544

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

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Price

Cheapest round-trip

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sat 11/14

5:07 pm-10:15 am

2 stops13h 08m

San Juan Luis Munoz Marin Intl

Sat 11/21

2:20 pm-8:30 am

2 stops22h 10m

$344

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sat 12/5

8:44 am-1:58 pm

2 stops25h 14m

San Juan Luis Munoz Marin Intl

Wed 12/9

5:01 am-10:17 pm

2 stops21h 16m

$398

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 1/17

6:00 am-11:54 pm

1 stop13h 54m

San Juan Luis Munoz Marin Intl

Thu 1/21

1:18 pm-11:16 pm

2 stops13h 58m

$458

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 1/17

6:20 am-11:54 pm

2 stops13h 34m

San Juan Luis Munoz Marin Intl

Thu 1/21

1:18 pm-10:15 pm

2 stops12h 57m

$458

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Mon 1/11

7:00 am-11:50 pm

1 stop12h 50m

San Juan Luis Munoz Marin Intl

Thu 1/21

3:55 pm-10:14 pm

1 stop10h 19m

$494

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 3/4

5:00 am-6:25 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Wed 3/10

8:25 am-8:19 pm

2 stops15h 54m

$506

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sun 11/15

6:00 am-9:24 pm

1 stop11h 24m

San Juan Luis Munoz Marin Intl

Wed 11/18

3:46 pm-9:40 pm

1 stop9h 54m

$518

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Wed 4/21

7:30 am-9:40 pm

2 stops11h 10m

San Juan Luis Munoz Marin Intl

Sun 4/25

9:20 pm-11:10 am

2 stops16h 50m

$534

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Thu 3/4

9:05 am-11:40 pm

2 stops10h 35m

San Juan Luis Munoz Marin Intl

Wed 3/10

11:25 am-7:45 pm

2 stops12h 20m

$552
Quickest round-trip

OntarioSan Juan

ONT Ontario - SJU San Juan Luis Munoz Marin Intl

ONTSJU

Ontario

Sat 3/27

12:00 pm-11:19 pm

1 stop8h 19m

San Juan Luis Munoz Marin Intl

Wed 4/7

2:45 pm-10:14 pm

1 stop10h 29m

$992

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 $504 to $832.
The lowest price recently found on this route was $344.

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 $582 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 $405 on momondo.

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

You could potentially save up to 18% 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 October 2026, prices for Ontario to San Juan Luis Munoz Marin Intl Airport flights are approximately 3% more expensive 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

$178

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 $178. 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 $344.
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
8,659 reviews
Search Delta flights
United AirlinesPriceFrom $318Free CancellationRating
7.3
10,396 reviews
Search United Airlines flights
American AirlinesPriceFrom $376Free CancellationRating
7.0
12,183 reviews
Search American Airlines flights
SouthwestPriceFrom $419Free CancellationRating
7.9
4,208 reviews
Search Southwest 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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