$142 Find Cheap Flights from Ontario to Puerto Rico - Compare and Save

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Price, demand and travel trends for Ontario to Puerto Rico flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from Ontario to Puerto Rico cheaper or more expensive than last year?

Fares from Ontario to Puerto Rico are running about 10% lower than they were around this time last year, averaging $542 round-trip.

What are the cheapest fares from Ontario to Puerto Rico right now?

The cheapest fare from Ontario to Puerto Rico in the last week was $343 round-trip, to San Juan Luis Munoz Marin Intl (SJU).

What’s the cheapest month to fly from Ontario to Puerto Rico?

October is the cheapest time of year to fly, with average fares of $456. Prices are highest in November, when average flight costs increase to around $941.

When is the best time to book flights from Ontario to Puerto Rico?

Book your flights 16 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 41% compared to booking last-minute (within 2 weeks of departure).

Which airport in Puerto Rico is the cheapest to fly to from Ontario?

All flights from Ontario to Puerto Rico arrive at San Juan Luis Munoz Marin Intl (SJU). On average, round-trip fares are around $561.

What’s the cheapest day to fly from Ontario to Puerto Rico?

Sunday tends to be the cheapest day to fly from Ontario to Puerto Rico, while Friday is the most expensive. Fares run about 31% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from Ontario to Puerto Rico?

Data from the past 12 months shows it's cheapest to fly to Puerto Rico during the evening with average prices of $533. The afternoon is the most expensive time to fly, with average prices of $666.

Key details for Ontario to Puerto Rico flights

Low season

October

Cheapest flight

$142
Beat the crowds with an average 41% drop in travelers.
The most popular month to fly with an average 59% increase in travelers.
One-way flight from Ontario to San Juan Luis Munoz Marin Intl Airport

Your Ontario to Puerto Rico flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from Ontario to Puerto Rico?

    Yes. Fares from Ontario to Puerto Rico are low right now. As a rule of thumb, a round-trip under $474 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from Ontario to Puerto Rico?

    Over the past 12 months, round-trip fares from Ontario to Puerto Rico have ranged from $474 to $686.

  • What airlines fly nonstop from Ontario to Puerto Rico?

    Based on the flight schedule for the next 3 months, no airline regularly operates nonstop flights from Ontario to Puerto Rico. One-stop options include:

    • American Airlines
    • United Airlines
    • Delta

  • Which cabin classes are available on flights from Ontario to Puerto Rico?

    On flights from Ontario to Puerto Rico you can book Economy Class or First Class.

  • What are some popular landmarks in Puerto Rico?

    KAYAK travelers' favorite landmarks in Puerto Rico include:

    • Viejo San Juan
    • Puerto Rico Convention Center
    • Condado Beach
    • Ocean Park

Your guide to booking Ontario to Puerto Rico flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 16 weeks before your trip. KAYAK data shows fares in this window are around 41% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for October when flights are typically cheapest and avoid November when prices are at their highest.
  • Flying on Sunday is usually the cheapest. Flights on Friday cost about 31% more on average, so being flexible with your travel dates could help you save.
  • Start your trip in San Juan, which is the most popular destination in Puerto Rico. From there, it's easy to continue on to other popular destinations such as Carolina, Fajardo and Rio Grande.

Reviews of the top 4 airlines serving from Ontario to Puerto Rico

 
Need help choosing which airline to fly with from Ontario to Puerto Rico? 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.
8.0
SouthwestOverall score based on 4223 reviews
8.1Boarding
8.6Crew
7.5Entertainment
7.0Food
8.0Comfort
Airline reviews

Terrible, decided to delay our flight since another flight require a flight captain

2.0 MediocreChih Hsuan, Nov 2026
Read more Southwest reviews

Terrible, decided to delay our flight since another flight require a flight captain

staff and crew were great but the flight delays for the last few flights are insane. After a long day of work and you will get a notification of flights delay is not the message we want to see. And for some reason it keeps happening often this year.

They delayed my flight all day but didn't try to reschedule me until all other options were gone. Ended up on a red eye. Not happy. Lesson learned, don't book the last flight from SJC to RDU.

Friendly crew. Snacks were carb-heavy. Flight was quite delaye

the flight was significantly delayed. Not much was done by the airline to compensate passengers

Boarding now takes twice as long since going with assigned seats.

Not exactly Southwest’s problem, but the new Burbank airport is not great. No restaurants open and tons of work still to be completed. Can’t believe they opened the airport in that condition.

Flight boarded 2.5 hours late (my second southwest flight of the day with late departure), the gate agent was grumpy and unhelpful. Said she was "tired so we aren't going to follow normal boarding order". No complaints about the actual flight crew.

Flight was delayed, full flight and I had to change gates. Southwest flights are always late later in the day.

I liked receiving attention from aged and well experienced flight attendants. I disliked the non-gluten-free snack but I brought my own so I was OK.

Great overall experience and use of the Delta One lounge was amazing!

I used by Skymiles to upgrade to First so that I could comfortably work using my laptop. But WiFi was intermittent and unavailable for long periods. I feel like I wasted 70,000 miles :(

Chairs don’t recline and the ones that do recline, barely do recline. It was most uncomfortable flight i ever been on.

Everything was pretty good. I would like to have more drinks (water) during four hours of the flight.

Rude staff from baggage check to gate crew. Poor instructions. Inconsistent application of baggage rules.

It was a great flight and the stewards and stewardess were all kind and accommodating!! The seats were comfortable and entertainment screen excellent!

737-800 in first class was pretty dumpy. Seat had an uncomfortable angle, storage under the seat was blocked so even my very modest backpack didn't fit, power outlet was flaky. Weird tiny seat pockets that couldn't hold a gallon ziploc bag, emesis bag missing, etc. etc. No in-flight service due to turbulence. Crew was excellent, boarding was smooth despite a full flight.

The flight was overbooked and the staff at the gate started calling for volunteers to drop out and offering incentives. That delayed the flight

There was no wifi even after my husband paid for wifi it wasn’t working. The plane looked and felt old.

Update the cabin with tv screens or at least music sources.

Check in went smoothly. Flight attendant who was assigned my area barely paid any attention to me! She acted as though she was extremely busy and flustered. Maybe she was new?! I told her to change the language on my screen, she said she’d come back to help me but never did so I was able to solve the problem on my own. She came back and said she’d made adjustments on her end. Highly doubt it because I found the setting to change the language! Also, I noticed everyone was eating before we landed so I pushed my help button and she never came so I got up to find her to ask her if I can have breakfast. She said they are not serving breakfast but I can have a sandwich. Yes, that was her response as I saw everyone eating breakfast!!!

Flight delay in lax which delayed our connecting flight to Copenhagen. Was placed on standby the following day and got delayed again at Scandinavian air. Bad bad counter service at ar Canada in Toronto by the name of Camilla who said that she was doing us a courtesy for even finding a earlier flight for us after we the customer are the ones being inconvenient by the cancellation of our flight. Btw, we are going on a tour. Air Canada is the worse

New Max 10, first class seats have been shrunk. End of a 20 hour journey, it was United not Lufthansa, just glad to get home

Seats are uncomfortable and left me in pain in my tailbone area. I got about one hour of sleep.

Delay of two hours due to some mechanical issue. Staff was wonderful and the pilot did let us know what was going on.

One of my checked luggage was damaged. Cracked on the top by the handle.

Not so good. Crew was not as attentive as they should have been especially if flying business class. Only offered dinner 2 hours after takeoff. My flight attendant seemed overwhelmed. Pushed my help button but no one came. I explained everything on my previous review.

I have been flying united for a long time but now I’m done

Delayed - leaving, delayed getting to the gate at destination. What should have been a very easy flight and experience was not.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Flight was comfortable- just had to endure a 1 hr delay because of some maintenance issue. Happy that American Airlines does these final checks but just wish they would conduct this maintenance before the flights.

All good. Easy check in and boarding. Lovely flight crew

The crew was great! The issue for me is the aircraft. The Airbus A32x is just not comfortable enough and the entertainment delivery via personal devices is problematic.

American was the airline that Starlux contracted for this trip. I arrived in time to make the connecting flight on American, and then the baggage-handler debacle happened. For some reason, the first class and premium economy passengers' luggage was unloaded first. Never seen this happen before. They had handlers removing the bags from the carousel for those passengers. Meanwhile, all of the economy passengers were waiting for their bags, including me. And there were a lot of bags because it was an international flight packed full. While waiting for 45 minutes, my bag didn't show. Meanwhile, an American representative showed up asking if anyone has a connecting flight to Phoenix. Of course I spoke up, and they proceeded to try to find my bag because I had to take a bus to the actual terminal to catch my flight. Which I was not informed of before I arrived. After another 15 minutes of searching, my bag was finally found with the first-class passengers' bags because they had pulled it by mistake. So I rushed to the terminal with the American representative to catch my flight, and they informed me that I missed it and could not get another flight until the next day. Of course, after being on an international flight for 18 hours, I was in no mood to hear this. Now, to be fair, there were a few American employees who tried to help me. After hearing about the missed flight, they got a supervisor to talk to. I expressed my situation to the supervisor, and she was not helpful until I asked for compensation. She agreed to get me a hotel room for the night. So I agreed, and she disappeared into her office, and I waited. And waited. And waited. And waited. While waiting, I was asked by three different employees who knew of my situation if I had been helped. I told them I was waiting for the supervisor to get the hotel room, and they said they would check. Finally, after waiting for 75 minutes, one of the employees who had asked me if I had been helped arrived with my hotel room and arranged a ride to the hotel for me. Never saw the supervisor again. It was now 8 o'clock; I arrived at 5:45! My rebooked fight was scheduled for 6:11 this morning and I have now been informed it has been delayed until 10:00. So am I happy with American? NO I'M NOT!! ;

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

Good flight, seated and had a water within 5 minutes. Crew was hospitable.

The flight was on time and arrived early. The crew were friendly and helpful.

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

VERY disappointed at the agent checking in my luggage. I know that the weight limit is 23 kg, a little over 50 pounds (50.71 pounds). Yet the agent kept repeating "50 pounds". So I said, the limit is 23 kg, and she had the audacity to say 'no, it is 22 kg!" Imagine my surprise. Was she ignorant or was she poorly trained? Not sure. The boarding process was pretty good. The speakers were loud enough so I still could hear them despite inconsiderate passengers continuing to speak while the announcements were going on. During the flight, the teenage girl sitting behind me kept pressing her feet to the back of my chair. I turned around several times, yet she did not get the hint. I did not make a fuss since I sense I had a bad streak that night with AA, so I just did the best I can to lean forward and not let that bother me.

It was wonderful upgrading to first. Plane was so cold thou. Crew was great. Wish there was a food option in first for such a long flight. Doesnt matter the time of day. Chintzy.

More options for your flight from Ontario to Puerto Rico

Complete your trip to Puerto Rico with a hotel stay or car rental