SJU - ONT

$132 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 3/3. 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
$332
Southwest
Fri 5/29Mon 6/22
SJU - ONT • 1 stop
Cheapest one-way
$132
Typical prices: $297-$343
Frontier
Tue 3/3
SJU - ONT • 2 stops
Top airlines
Southwest
Cheapest • from $332 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
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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

Fri, May 29 - Mon, Jun 22
Southwest Logo
5:35 am - 3:15 pm
SJU
-
ONT
12h 40m
1 stop
Southwest Logo
9:40 am - 12:25 am
ONT
-
SJU
11h 45m
1 stop
$332Southwest
Fri, May 29 - Tue, Jun 23
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
$371Southwest
Fri, May 29 - Mon, Jun 22
Southwest Logo
5:05 am - 3:15 pm
SJU
-
ONT
13h 10m
2 stops
Southwest Logo
9:40 am - 12:25 am
ONT
-
SJU
11h 45m
1 stop
$380Southwest
Thu, Jul 16 - Wed, Jul 22
Southwest Logo
5:00 am - 2:00 pm
SJU
-
ONT
12h 00m
2 stops
Southwest Logo
9:40 pm - 12:25 pm
ONT
-
SJU
11h 45m
1 stop
$419Southwest
Fri, May 29 - Mon, Jun 22
Southwest Logo
5:05 am - 3:15 pm
SJU
-
ONT
13h 10m
2 stops
Southwest Logo
8:45 pm - 10:25 am
ONT
-
SJU
10h 40m
2 stops
$437Southwest
Fri, May 22 - Wed, May 27
Southwest Logo
5:35 am - 3:15 pm
SJU
-
ONT
12h 40m
1 stop
Southwest Logo
6:15 am - 9:05 pm
ONT
-
SJU
11h 50m
2 stops
$443Southwest
Thu, Jul 16 - Wed, Jul 22
Southwest Logo
5:00 am - 2:00 pm
SJU
-
ONT
12h 00m
2 stops
Southwest Logo
8:25 pm - 10:45 am
ONT
-
SJU
11h 20m
2 stops
$458Southwest
Sat, May 30 - Mon, Jun 22
Southwest Logo
10:00 am - 10:00 pm
SJU
-
ONT
15h 00m
1 stop
Southwest Logo
9:40 am - 12:25 am
ONT
-
SJU
11h 45m
1 stop
$468Southwest
Thu, Jun 4 - Wed, Jun 10
Southwest Logo
10:20 am - 10:25 pm
SJU
-
ONT
15h 05m
1 stop
Southwest Logo
1:05 pm - 12:45 am
ONT
-
SJU
8h 40m
1 stop
$476Southwest
Tue, Jul 28 - Wed, Aug 12
American Airlines Logo
12:39 am - 12:07 pm
SJU
-
ONT
14h 28m
2 stops
American Airlines Logo
11:59 pm - 3:59 pm
ONT
-
SJU
13h 00m
2 stops
$479American 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.

Which airlines provide the cheapest flights from San Juan to Ontario?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from San Juan to Ontario were found on Southwest ($332) and Frontier ($396).

Good to know

Cheapest flight$132
Most popular time to fly and prices are also 4% 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 $132 for a one-way ticket and $332 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 $600 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 9273 reviews
7.3Comfort
7.1Entertainment
7.7Boarding
8.1Crew
6.6Food
Airline reviews

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

10.0 ExcellentBill, Feb 2026
IAH - LAX
Read more United Airlines reviews

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

Very poor. The flight was delayed from Toronto because some forget to do there job . I got to my connecting gate in San Francisco 10 minutes before the departure.but this didn’t let me board even though the flight was still there for an other 30 minutes. The the gentleman at the unite airline desk told me that they usually wait for passengers but air Canada called and told them not to we I been rerouted to Manila instead of Hong Kong . In San Francisco they mad me check in my carryon bag . I was told the it will directly go yo ho chi minn cuyt but I was told that by the Vietnams airline desk that’s not there I’m 10 hours behind my scheduled flight and looks like I I’m going without baggage. I don’t have a chance of catching ..

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Mean flight attendant. I wanted to reuse my plastic cup, but he (Matthew) said he can't for safety. I then said "I don't want water then" and he poured me a glass. I hope Matthew gets herpes and spends the rest of his life poor, lonely, and homeless.

Yet another flight in which beverage and snack service was skipped. Other that that, firmly mediocre. Landed early, to gate late due to congestion at the gates. Airline's fault or airports fault: unknown.

Both flights delayed. 2nd flight over 3 hours late mechanical issues

Flight was delayed 45 minutes because originating flight was coming from Newark. No complimentary snacks were offered on this 5+ hour flight. No screens for the flight, but movies offered if you had already downloaded the United app (which I hadn't on my ipad). No USB ports, only a flimsy plug-in port near the bottom of the seat that was hard to see and kept coming unplugged.

It was good but only meal served is very less. Meantime good to add rice and chicken in one of meal

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

We were upgraded to Business Class. So comfortable with great service and food options

The flight was completely full. Crew was not happy. Everyone was rude and brusque. Travelling with an arm in a cast and seating in the first row of economy cabin (in front of the separation) I needed help retrieving my tray for the meal. A staff member literally threw the tray on my lap, without helping to take out the tray. Boarding was messy, with 300 people waiting in an encloses space with low ceiling. I will try to avoid AA next time I have a long flight.

The comfort of Business Class made this trip far more comfortable. I was indeed surprised when I asked one of the flight attendant to help me set up my "bed", she responded that "We don't make beds in Business Class any longer...only First Class" I believe her name was Giselle, but I'm not certain. She did instruct me how to adjust the seat, place the hooded cover and I clearly understood how to place the blanket and the cover. Additionally, the meal I was served (a beef dish) was almost inedible. The beef was tough and odd tasting. I didn't mention it as I was hoping to quickly settle down and try to get some sleep.

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

After the door had been closed, the cockpit makes an announcement that catering is running late and it is not the airline's fault. It is their fault in the sense that we had to sit for 2 hours or more when we could have stayed in the terminal. Poor communications between catering and airline. This caused a young man to lose his temper and he went storming out hitting objects. He had complained to the gate agent that he had already waited at the gate 7 hours and when can the airplane leave? Airilnes do a poor job of explaining delays, maintenance issues, etc. whereas being truthful may gain more sympathy or understanding.

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

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

Information on your arrival and departure airports