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Cheap flights from San Juan Luis Munoz Marin Intl Airport to Los Angeles from $123

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Juan Luis Munoz Marin Intl Airport to Los Angeles departing on 5/23. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from San Juan Luis Munoz Marin Intl Airport to Los Angeles

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:00 am - 6:57 pm
SJU
-
ONT
15h 57m
2 stops
American Airlines Logo
11:59 pm - 6:15 pm
ONT
-
SJU
15h 16m
2 stops
$354American Airlines
Tue, Aug 25 - Sat, Aug 29
Southwest Logo
5:35 am - 3:15 pm
SJU
-
ONT
12h 40m
1 stop
Southwest Logo
9:55 am - 12:15 am
ONT
-
SJU
11h 20m
2 stops
$412Southwest
Thu, May 28 - Tue, Jun 30
American Airlines Logo
11:59 pm - 10:09 am
SJU
-
ONT
13h 10m
1 stop
American Airlines Logo
7:35 pm - 12:03 pm
ONT
-
SJU
13h 28m
2 stops
$439American Airlines
Thu, Apr 16 - Mon, Apr 20
Southwest Logo
5:35 am - 3:15 pm
SJU
-
ONT
12h 40m
1 stop
Southwest Logo
8:25 pm - 10:25 am
ONT
-
SJU
11h 00m
2 stops
$442Southwest
Thu, May 28 - Tue, Jun 23
Southwest Logo
5:05 am - 2:25 pm
SJU
-
ONT
12h 20m
2 stops
Southwest Logo
9:55 am - 12:15 am
ONT
-
SJU
11h 20m
2 stops
$446Southwest
Thu, May 28 - Tue, Jun 30
Multiple Airlines Logo
10:00 am - 8:45 pm
SJU
-
ONT
13h 45m
1 stop
Multiple Airlines Logo
4:15 pm - 5:53 am
ONT
-
SJU
10h 38m
1 stop
$453Multiple Airlines
Tue, Jun 2 - Wed, Jun 17
Multiple Airlines Logo
12:00 pm - 7:11 pm
SJU
-
ONT
10h 11m
1 stop
Multiple Airlines Logo
6:00 am - 4:01 am
ONT
-
SJU
43h 01m
2 stops
$455Multiple Airlines
Wed, May 20 - Wed, Jun 3
Multiple Airlines Logo
12:00 pm - 7:11 pm
SJU
-
ONT
10h 11m
1 stop
Multiple Airlines Logo
6:00 am - 5:26 pm
ONT
-
SJU
32h 26m
2 stops
$464Multiple Airlines
Wed, May 20 - Tue, Jun 2
Southwest Logo
5:35 am - 3:15 pm
SJU
-
ONT
12h 40m
1 stop
Southwest Logo
1:05 pm - 12:45 am
ONT
-
SJU
8h 40m
1 stop
$465Southwest
Thu, May 28 - Tue, Jun 30
Frontier Logo
6:15 am - 3:25 pm
SJU
-
ONT
12h 10m
1 stop
Frontier Logo
4:15 pm - 5:53 am
ONT
-
SJU
10h 38m
1 stop
$466Frontier
Wed, Aug 26 - Sun, Aug 30

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

Our best Southwest deals on San Juan Luis Munoz Marin Intl Airport to Ontario flight tickets
Southwest
May 28
SJU5:35 amSan Juan Luis Munoz Marin Intl
12h 40m
1 stop
ONT3:15 pmOntario
Jun 30
ONT9:55 amOntario
11h 20m
2 stops
SJU12:15 amSan Juan Luis Munoz Marin Intl
$412
Southwest
May 28
SJU5:35 amSan Juan Luis Munoz Marin Intl
12h 40m
1 stop
ONT3:15 pmOntario
Jun 23
ONT8:25 pmOntario
11h 00m
2 stops
SJU10:25 amSan Juan Luis Munoz Marin Intl
$442
Southwest
May 28
SJU5:05 amSan Juan Luis Munoz Marin Intl
12h 20m
2 stops
ONT2:25 pmOntario
Jun 30
ONT9:55 amOntario
11h 20m
2 stops
SJU12:15 amSan Juan Luis Munoz Marin Intl
$446

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

Our best Frontier deals on San Juan Luis Munoz Marin Intl Airport to Ontario flight tickets
Frontier
Aug 26
SJU6:15 amSan Juan Luis Munoz Marin Intl
12h 10m
1 stop
ONT3:25 pmOntario
Aug 30
ONT4:15 pmOntario
10h 38m
1 stop
SJU5:53 amSan Juan Luis Munoz Marin Intl
$466
Frontier
Jun 11
SJU6:15 amSan Juan Luis Munoz Marin Intl
12h 10m
1 stop
ONT3:25 pmOntario
Jun 17
ONT4:15 pmOntario
10h 38m
1 stop
SJU5:53 amSan Juan Luis Munoz Marin Intl
$506

momondo Fare Finder

 
Customize your flight search to find flights from San Juan Luis Munoz Marin Intl Airport to Ontario 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 March 23, 2026.
Use the filters below to find and compare flights from San Juan Luis Munoz Marin Intl Airport to Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 8/25

6:00 am-6:57 pm

2 stops15h 57m

Ontario

Sat 8/29

11:59 pm-6:15 pm

2 stops15h 16m

$354

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 5/28

5:35 am-3:15 pm

1 stop12h 40m

Ontario

Tue 6/30

9:55 am-12:15 am

2 stops11h 20m

$412

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 4/16

11:59 pm-10:09 am

1 stop13h 10m

Ontario

Mon 4/20

7:35 pm-12:03 pm

2 stops13h 28m

$439

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 5/28

5:35 am-3:15 pm

1 stop12h 40m

Ontario

Tue 6/23

8:25 pm-10:25 am

2 stops11h 00m

$442

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 5/28

5:05 am-2:25 pm

2 stops12h 20m

Ontario

Tue 6/30

9:55 am-12:15 am

2 stops11h 20m

$446

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Tue 6/2

10:00 am-8:45 pm

1 stop13h 45m

Ontario

Wed 6/17

4:15 pm-5:53 am

1 stop10h 38m

$453

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 5/20

12:00 pm-7:11 pm

1 stop10h 11m

Ontario

Wed 6/3

6:00 am-4:01 am

2 stops43h 01m

$455

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 5/20

12:00 pm-7:11 pm

1 stop10h 11m

Ontario

Tue 6/2

6:00 am-5:26 pm

2 stops32h 26m

$464
Quickest round-trip

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Thu 5/28

5:35 am-3:15 pm

1 stop12h 40m

Ontario

Tue 6/30

1:05 pm-12:45 am

1 stop8h 40m

$465

San JuanOntario

SJU - ONT

SJUONT

San Juan Luis Munoz Marin Intl

Wed 8/26

6:15 am-3:25 pm

1 stop12h 10m

Ontario

Sun 8/30

4:15 pm-5:53 am

1 stop10h 38m

$466

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 Los Angeles from

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

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 Ontario?

In general, January is the cheapest month to fly from San Juan Luis Munoz Marin Intl Airport to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $288. If you aren’t able to travel during the month of January, then book flights to Ontario from San Juan Luis Munoz Marin Intl Airport during July instead. Flights to Ontario in July, while not as cheap as those in January, still average around $333.

How far in advance should I book a flight to Ontario?

You are more likely to see cheaper flights to Ontario from San Juan Luis Munoz Marin Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ontario for around $439 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ontario from San Juan Luis Munoz Marin Intl Airport for as low as $365 on momondo.

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

As of March 2026, prices for San Juan Luis Munoz Marin Intl Airport to Ontario flights are approximately 24% more expensive when compared to flights at the same time last year.

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

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

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

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

Fastest flight time

9h 55m

Direct flights

None
The fastest flight from San Juan Luis Munoz Marin Intl Airport to Ontario takes 9h 55m
There are no direct flights from San Juan Luis Munoz Marin Intl Airport to Ontario. There are no popular flight routes from San Juan Luis Munoz Marin Intl Airport to Ontario.
Search flight deals

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

    A flight from San Juan Luis Munoz Marin Intl to Ontario will travel around 3337.2 mi. By plane, this route typically takes 9h 55m.

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

    Prices for flights from San Juan Luis Munoz Marin Intl Airport to Ontario Airport were last updated today.

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

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Juan Luis Munoz Marin Intl Airport to Ontario Airport.

  • What documentation or ID do you need to fly to Ontario Airport?

    The travel and health documents required for your trip to Ontario Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Ontario Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

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

Compare and see reviews for airlines that fly from San Juan Luis Munoz Marin Intl Airport to Ontario with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $365Free CancellationRating
7.1
11,489 reviews
Search American Airlines flights
United AirlinesPriceFrom $367Free CancellationRating
7.4
9,460 reviews
Search United Airlines flights
SouthwestPriceFrom $389Free CancellationRating
8.0
4,324 reviews
Search Southwest flights

Why use momondo?

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

Finding the right flight to Ontario from San Juan is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Ontario quick and easy, saving you time and money.

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

Yes. momondo allows you to filter the results for San Juan to Ontario flights to just show those with flexible booking policies.

How can momondo help me find flights from San Juan to Ontario?

momondo provides multiple filters to help you find the best flight to Ontario from San Juan. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Ontario from San Juan are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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