CA $352 Cheap Flights from Ontario Intl. Airport (ONT) to San Juan (SJU)

View CA $352 flight on Sat, Jul 4, 2026Opens in a new window

Popular airlines from Los Angeles - Ontario Intl. Airport (ONT) to Luis Munoz Marin Intl. Airport (SJU)

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Cheap flights from Ontario Intl. Airport (ONT) to San Juan (SJU)

Prices were available within the past 7 days and start at CA $352 for one-way flights and CA $833 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Sat, Jul 4 - Thu, Jul 9
ONT
Ontario
SJU
San Juan
CA $833 Roundtrip, found 9 hours ago
CA $833
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sat, Jul 4 from Ontario to San Juan, returning Thu, Jul 9, priced at CA $833 found 9 hours ago
American Airlines
Sat, Jul 4 - Thu, Jul 9
ONT
Ontario
SJU
San Juan
CA $834 Roundtrip, found 9 hours ago
CA $834
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sat, Jul 4 from Ontario to San Juan, returning Thu, Jul 9, priced at CA $834 found 9 hours ago
Delta
Sat, May 23 - Mon, Jun 8
ONT
Ontario
SJU
San Juan
CA $901 Roundtrip, found 4 days ago
CA $901
Roundtrip
found 4 days ago
Select Delta flight, departing Sat, May 23 from Ontario to San Juan, returning Mon, Jun 8, priced at CA $901 found 4 days ago
American Airlines
Sat, Jul 4 - Thu, Jul 9
ONT
Ontario
SJU
San Juan
CA $927 Roundtrip, found 9 hours ago
CA $927
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sat, Jul 4 from Ontario to San Juan, returning Thu, Jul 9, priced at CA $927 found 9 hours ago
American Airlines
Sat, Jul 4 - Thu, Jul 9
ONT
Ontario
SJU
San Juan
CA $936 Roundtrip, found 9 hours ago
CA $936
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Sat, Jul 4 from Ontario to San Juan, returning Thu, Jul 9, priced at CA $936 found 9 hours ago
Delta
Sat, May 23 - Thu, May 28
ONT
Ontario
SJU
San Juan
CA $950 Roundtrip, found 2 days ago
CA $950
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, May 23 from Ontario to San Juan, returning Thu, May 28, priced at CA $950 found 2 days ago
JetBlue Airways
Mon, Jul 6 - Fri, Jul 10
ONT
Ontario
SJU
San Juan
CA $974 Roundtrip, found 2 days ago
CA $974
Roundtrip
found 2 days ago
Select JetBlue Airways flight, departing Mon, Jul 6 from Ontario to San Juan, returning Fri, Jul 10, priced at CA $974 found 2 days ago

Find the cheapest month to fly from Ontario (ONT) to San Juan (SJU)

September is typically the cheapest month to fly

From CA $437 - CA $636 per traveller.

Frequently asked questions

How much does a flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) cost?
One-way flights typically cost between $3,288 and $8,130 and return flights often range between $3,288 and $8,130. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
May is typically the cheapest month to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.), with average round-trip fares of approximately 1192 CAD. This is about 13% lower than the average price throughout the year. May often sees lower prices as it's just before the peak summer travel season, when demand tends to increase. Other cheap months to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) include September and October.*Averages based on flights available on Expedia in the last year.
How do I find cheap flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
To find a cheap flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
Based on booking data from the past year, if you're looking for the best time to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.), you'll find the cheapest fares in May and October, with average round-trip flights around 1192 CAD. December is the most popular month for this route, meaning there are plenty of flight options, but prices might be higher due to demand. For the best balance of good prices and availability, consider May or October for your trip.*Prices based on flights available on Expedia in the last year.
How many flights per day from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
There are approximately 50 connecting flights per day from Los Angeles - Ontario Intl. (ONT) to Luis Munoz Marin Intl. (SJU). Some common connection points include Sky Harbor Intl. (PHX), Denver Intl. (DEN), and Dallas-Fort Worth Intl. (DFW).
What is the earliest flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
The earliest flight from Los Angeles - Ontario Intl. (ONT) to Luis Munoz Marin Intl. (SJU) typically departs at approximately 12:55 AM local time, operated by American Airlines. This is a seasonal service active in October. An early departure like this can help you maximize your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
You'll typically find the most flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) on a Thursday, with around 31 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include Southwest Airlines, American Airlines, and United Airlines. Flight schedules are consistent throughout the week, with only a slight variation between days.
What are the most popular departure times for flights from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
The most popular departure times for flights from Los Angeles - Ontario Intl. (ONT) to Luis Munoz Marin Intl. (SJU) are in the late evening, from 9pm to midnight. About 27% of passengers prefer this time window. Many major carriers, including American Airlines, Southwest Airlines and Delta Air Lines, offer flights during this window. This timing works well because you can make the most of your day before your flight.
How long does it take to fly from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
A flight from ONT to SJU with a layover takes around 10 hours 30 minutes, with the route covering approximately 3,336 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
Select the "Business class" and "First class" filters when looking for ONT to SJU flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) flight with Expedia?
It's easy to earn miles on a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for San Juan from Los Angeles - Ontario Intl. (ONT)?
If you're planning to travel to San Juan from Los Angeles - Ontario Intl. (ONT), you can fly into Luis Munoz Marin Intl. (SJU) Some flights may connect through major hubs like Sky Harbor Intl. (PHX), Denver Intl. (DEN), Harry Reid Intl. (LAS) before reaching San Juan. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) at the last minute?
Typically, booking a last minute flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) flight and hotel package?
Securing a Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.)?
If you booked your Ontario, CA (ONT-Los Angeles - Ontario Intl.) to San Juan (SJU-Luis Munoz Marin Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Ontario Intl. Airport
Destination airport
Luis Munoz Marin Intl.
Airlines serving
American Airlines, JetBlue Airways, United
Roundtrip price
CA $832
Distance
5337 km

Book with confidence

Los Angeles to San Juan Flights

The easy way to book your flights from Ontario Intl. Airport to San Juan 

With Expedia, it’s simple to find and book flights to San Juan from Ontario Intl. Airport whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Luis Munoz Marin Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Ontario Intl. Airport to San Juan today, tomorrow, or this week.  

 

Save dollars with cheap flights from Ontario Intl. Airport, ONT to Luis Munoz Marin Intl., SJU 

Sort your search results by price to find great deals on your flight from Ontario Intl. Airport to San Juan—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to San Juan from Ontario Intl. Airport currently is just CA $833 rising to CA $974.  

Here are more money-saving tips: 

  • Fly in July when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to San Juan  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to San Juan from Ontario Intl. Airport 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to San Juan with Expedia today.

Los Angeles to San Juan Flights

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*Available to Expedia members.