SJU - ONT

$130 Find Cheap Flights from San Juan to Ontario

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Juan to Ontario departing on 1/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Ontario

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Juan to Ontario, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Juan to Ontario, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$283
Overall average: $471
American Airlines
Thu 2/19Thu 2/26
SJU - ONT • 1 stop
Cheapest one-way
$130
Typical prices: $167-$338
Multiple Airlines
Thu 1/22
SJU - ONT • 2 stops
When to travel
July
Cheapest • 29% price drop
May
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Ontario!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Juan to Ontario (SJU-ONT)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Juan to Ontario that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Juan to Ontario

Thu, Feb 19 - Thu, Feb 26
American Airlines Logo
7:33 am - 11:59 pm
SJU
-
ONT
20h 26m1 stop
American Airlines Logo
6:15 am - 11:34 pm
ONT
-
SJU
13h 19m2 stops
$283American Airlines
Wed, Jan 14 - Sun, Jan 18
Multiple Airlines Logo
7:34 pm - 11:59 pm
SJU
-
ONT
32h 25m2 stops
Multiple Airlines Logo
7:56 pm - 12:27 pm
ONT
-
SJU
12h 31m1 stop
$294Multiple Airlines
Fri, Jan 23 - Tue, Jan 27
American Airlines Logo
3:54 pm - 10:48 pm
SJU
-
ONT
10h 54m1 stop
American Airlines Logo
7:16 am - 10:26 pm
ONT
-
SJU
11h 10m1 stop
$361American Airlines
Wed, Jan 14 - Sun, Jan 18
American Airlines Logo
6:30 am - 6:20 pm
SJU
-
ONT
15h 50m2 stops
American Airlines Logo
7:16 am - 10:26 pm
ONT
-
SJU
11h 10m1 stop
$366American Airlines
Thu, Apr 16 - Fri, Apr 17
United Airlines Logo
1:40 pm - 8:36 pm
SJU
-
ONT
9h 56m1 stop
United Airlines Logo
6:00 am - 8:38 pm
ONT
-
SJU
11h 38m1 stop
$373United Airlines
Wed, Jan 14 - Sun, Jan 18
Multiple Airlines Logo
7:44 pm - 1:48 pm
SJU
-
ONT
22h 04m1 stop
Multiple Airlines Logo
7:56 pm - 12:27 pm
ONT
-
SJU
12h 31m1 stop
$378Multiple Airlines
Thu, Feb 12 - Mon, Feb 16
American Airlines Logo
7:33 am - 1:49 pm
SJU
-
ONT
10h 16m1 stop
American Airlines Logo
6:00 am - 11:31 pm
ONT
-
SJU
13h 31m1 stop
$386American Airlines
Tue, Jan 13 - Sat, Jan 17
American Airlines Logo
6:00 am - 6:20 pm
SJU
-
ONT
16h 20m2 stops
American Airlines Logo
12:57 pm - 10:48 am
ONT
-
SJU
17h 51m2 stops
$399American Airlines
Thu, Feb 19 - Thu, Feb 26
American Airlines Logo
7:33 am - 10:29 pm
SJU
-
ONT
18h 56m1 stop
American Airlines Logo
6:00 am - 11:31 pm
ONT
-
SJU
13h 31m1 stop
$404American Airlines
Wed, Jan 14 - Sun, Jan 18
American Airlines Logo
6:00 am - 6:20 pm
SJU
-
ONT
16h 20m2 stops
American Airlines Logo
7:30 pm - 10:48 am
ONT
-
SJU
11h 18m2 stops
$424American Airlines
Booking Insights

KAYAK's insights & trends for San Juan to Ontario flights

Get data-powered insights and trends into flights from San Juan to Ontario to help you find the cheapest flights, the best time to fly and much more.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Juan Luis Munoz Marin Intl Airport to Ontario, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Juan Luis Munoz Marin Intl Airport to Ontario is July, where tickets cost $333 (return) on average. On the other hand, the most expensive months are April and December, where the average cost of round-trip tickets is $590 and $587 respectively.

Good to know

Low seasonMarch
Cheapest flight$130
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly and prices are also 5% lower on average.
Flight from San Juan to Ontario

When to book flights from San Juan to Ontario

Are your dates flexible? Find out the best times to travel from San Juan to Ontario based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking San Juan to Ontario flights

  • What is the cheapest flight from San Juan Luis Munoz Marin Intl Airport to Ontario?

    In the last 3 days, the lowest price for a flight from San Juan Luis Munoz Marin Intl Airport to Ontario was $130 for a one-way ticket and $283 for a round-trip.

  • Do I need a passport to fly between San Juan and Ontario?

    Yes, you’ll need a passport to travel to Ontario from San Juan.

  • Which airports will I be using when flying from San Juan to Ontario?

    On your way to Ontario, you’ll fly out from San Juan Luis Munoz Marin Intl. You’ll be landing at Ontario.

  • Which aircraft models fly most regularly from San Juan to Ontario?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Juan to Ontario?

    Star Alliance, and oneworld are the airline alliances operating flights between San Juan and Ontario, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from San Juan to Ontario, United Airlines or American Airlines?

    The two airlines most popular with KAYAK users for flights from San Juan to Ontario are United Airlines and American Airlines. With an average price for the route of $520 and an overall rating of 7.4, United Airlines is the most popular choice. American Airlines is also a great choice for the route, with an average price of $574 and an overall rating of 7.2.

  • How does KAYAK find such low prices on flights from San Juan to Ontario?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Juan to Ontario.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Juan to Ontario?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from San Juan is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Juan to Ontario?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Ontario with an airline and back to San Juan with another airline. Booking your flights between San Juan and ONT can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Juan to Ontario?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Ontario from San Juan up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airlines flying from San Juan to Ontario

 
See real verified KAYAK customer reviews for airlines flying from San Juan to Ontario. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Juan to Ontario? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 9124 reviews
7.3Comfort
8.1Crew
7.7Boarding
7.1Entertainment
6.6Food
Airline reviews

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

2.0 MediocreGray, Dec 2025
IAH - SMF
Read more United Airlines reviews

Unbelievably poor service from flight attendants. They didn’t even do water service on a four hour flight. Just disrespectful.

Flight was late - I was downgraded from first class to coach

Movie selection is good. Crew did not understand mileage program and were no help. Sick later. Food?

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

The flight attendants were very rude, beyond comprehension. I took a business class from London to SFO for the first time on United. When I asked for a second piece of bread during dinner, the serving attendant threw a 3rd bread on my plate and said, “here. You can have this one too”! I couldn’t believe the rudeness of the attendant. Most all attendants were very rude, unhelpful, sing the food was absolutely disgusting. Never fly United internationally in business class. My flight back to SFO was a nightmare!!

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight from Rome to SFO was excellent compared To our flight to Europe from SFO. The food was much tastier. You can see how UNITED is skimping, though. Instead of getting something mid flight you had to ask for it. It was not automatically served. There was a cookie at the end of the arrival meal, for example that tasted like it just came out of a box. They used to serve a little container of nuts, now … a tiny container of nuts, mixed with pretzels. This was business class that you really have to pay for! But this is minor complaints compared to the overall. My major complaint is the position of the even numbered seats by the windows. You have to turn around to see your window & the positioning as some other controls are harder to get at. This is compared to the odd number seat that are perfectly aligned.

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

We were told the flight was delayed 5 times, then it was moved to the next day.

The experience with American Airlines was good, although the Philippines Airlines flight was much better (better seats, better food, better entertainment options, overall better). Again, the MIA to LAX flight was fine, but nothing in comparison to the comfort and accommodations of the Philippines Airlines flight from LAX to MNL.

Loved the crew . Absolutely no complaints. Except for luggage lost

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

We are too tired and frustrated to comment politely at this point

The business class seats are dated and uncomfortable. The space is bare minimum and there is absolutely no privacy. For $4K, this is not what I expect.

The flight crew was rude. We were in first class and no one even offered water until an hour after we were in the air. Horrible experience

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Did not get the seat I selected and paid for.

Everything you need to know for your flight from San Juan to Ontario

Information on your arrival and departure airports