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Flight Deals
Book Cheap Ontario to Puerto Rico Plane Tickets
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Puerto Rico 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 Ontario to Puerto Rico
Mon, Nov 30 - Tue, Dec 15
2:01 pm - 1:58 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
31h 57m2 stops Las Vegas Harry Reid Intl Miami
5:01 am - 10:17 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
21h 16m2 stops Atlanta Hartsfield-Jackson Denver Intl
$343Frontier
Wed, Dec 9 - Wed, Dec 16
8:44 am - 10:37 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
21h 53m2 stops Las Vegas Harry Reid Intl Orlando
5:01 am - 8:05 amSJU San Juan Luis Munoz Marin Intl-ONT Ontario
31h 04m2 stops Atlanta Hartsfield-Jackson Las Vegas Harry Reid Intl
$357Frontier
Tue, Dec 8 - Wed, Dec 16
6:00 am - 9:34 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
11h 34m2 stops Dallas/Fort Worth Miami
7:00 am - 4:20 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
13h 20m2 stops Charlotte Douglas Phoenix Sky Harbor Intl
$504American Airlines
Thu, Dec 10 - Thu, Dec 17
10:32 am - 12:09 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 37m1 stop Dallas/Fort Worth
5:12 pm - 11:59 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
10h 47m1 stop Dallas/Fort Worth
$504American Airlines
Wed, Dec 9 - Wed, Dec 16
6:00 am - 10:22 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
12h 22m2 stops San Francisco Washington, D.C. Dulles Intl
2:21 pm - 9:11 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
10h 50m1 stop Denver Intl
$504United Airlines
Fri, Dec 4 - Fri, Dec 11
6:40 pm - 11:50 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
13h 10m2 stops San Francisco Newark
2:05 am - 12:34 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
14h 29m2 stops Newark Denver Intl
$504United Airlines
Sun, Dec 6 - Sun, Dec 13
8:45 pm - 11:40 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
10h 55m2 stops Las Vegas Harry Reid Intl Orlando
5:35 am - 2:05 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
12h 30m2 stops Orlando Denver Intl
$615Southwest
Thu, Feb 18 - Tue, Feb 23
8:00 am - 11:45 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
11h 45m2 stops Austin Bergstrom Orlando
5:35 am - 2:10 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
12h 35m2 stops Orlando Austin Bergstrom
$616Southwest
Tue, Dec 29 - Tue, Jan 12
10:35 pm - 11:59 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 24m1 stop Atlanta Hartsfield-Jackson
1:48 pm - 9:44 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
11h 56m1 stop Atlanta Hartsfield-Jackson
$1,435Delta
Mon, Dec 28 - Tue, Jan 12
10:35 pm - 11:59 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 24m1 stop Atlanta Hartsfield-Jackson
1:48 pm - 9:44 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
11h 56m1 stop Atlanta Hartsfield-Jackson
$1,435Delta
Recent one-way flight deals from Ontario to Puerto Rico
Wed, Jan 6
9:00 am - 1:39 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
12h 39m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
$142Frontier
Tue, Jan 5
9:00 am - 6:31 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
17h 31m2 stops Las Vegas Harry Reid Intl Dallas/Fort Worth
$152Frontier
Sun, Jan 10
12:26 pm - 1:03 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
20h 37m2 stops Las Vegas Harry Reid Intl Atlanta Hartsfield-Jackson
$154Frontier
Tue, Dec 15
6:30 am - 10:35 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
12h 05m2 stops Phoenix Sky Harbor Intl Miami
$252American Airlines
Sat, Feb 6
6:00 am - 9:54 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
11h 54m1 stop Dallas/Fort Worth
$252American Airlines
Sat, Feb 6
3:59 pm - 11:50 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
15h 51m2 stops San Francisco Newark
$252United Airlines
Wed, Feb 17
6:00 am - 11:59 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
13h 59m1 stop Dallas/Fort Worth
$257American Airlines
Tue, Dec 15
5:00 am - 6:25 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 25m1 stop Denver Intl
$297United Airlines
Wed, Dec 23
10:35 pm - 11:59 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 24m1 stop Atlanta Hartsfield-Jackson
$578Delta
Wed, Dec 23
10:35 pm - 3:04 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
12h 29m1 stop Atlanta Hartsfield-Jackson
$578Delta
Recent last minute flight deals from Ontario to Puerto Rico
Mon, Nov 16 - Sat, Nov 21
8:03 pm - 6:21 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
18h 18m2 stops Dallas/Fort Worth Orlando
7:12 pm - 5:23 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
26h 11m2 stops Chicago O'Hare Intl Houston George Bush Intcntl
$503Frontier
Mon, Nov 16 - Sat, Nov 21
8:03 pm - 6:21 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
18h 18m2 stops Dallas/Fort Worth Orlando
7:58 pm - 6:20 amSJU San Juan Luis Munoz Marin Intl-ONT Ontario
14h 22m1 stop Dallas/Fort Worth
$509Frontier
Mon, Nov 16 - Sun, Nov 22
8:03 pm - 6:21 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
18h 18m2 stops Dallas/Fort Worth Orlando
7:58 pm - 6:20 amSJU San Juan Luis Munoz Marin Intl-ONT Ontario
14h 22m1 stop Dallas/Fort Worth
$515Frontier
Sat, Nov 14 - Tue, Nov 17
1:23 pm - 9:42 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
16h 19m2 stops Phoenix Sky Harbor Intl Miami
7:30 am - 4:19 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
12h 49m2 stops Miami Phoenix Sky Harbor Intl
$682American Airlines
Sat, Nov 14 - Tue, Nov 17
10:30 pm - 3:52 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
13h 22m1 stop Charlotte Douglas
6:19 am - 1:32 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
11h 13m1 stop Dallas/Fort Worth
$682American Airlines
Sat, Nov 14 - Tue, Nov 17
10:30 pm - 1:39 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
11h 09m1 stop Charlotte Douglas
1:00 pm - 10:12 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
13h 12m2 stops Miami Charlotte Douglas
$682American Airlines
Thu, Nov 19 - Sun, Nov 22
5:00 am - 6:25 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 25m1 stop Denver Intl
2:05 am - 3:33 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
17h 28m2 stops Newark San Francisco
$698United Airlines
Wed, Nov 18 - Fri, Nov 20
5:00 am - 6:25 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 25m1 stop Denver Intl
2:21 pm - 8:51 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
10h 30m1 stop Denver Intl
$762United Airlines
Thu, Nov 19 - Sat, Nov 28
10:05 am - 12:50 amONT Ontario-SJU San Juan Luis Munoz Marin Intl
10h 45m2 stops Denver Intl Orlando
11:00 am - 9:50 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
14h 50m1 stop Nashville Intl
$1,171Southwest
Thu, Nov 19 - Mon, Nov 23
11:10 pm - 12:42 pmONT Ontario-SJU San Juan Luis Munoz Marin Intl
9h 32m1 stop Atlanta Hartsfield-Jackson
3:20 pm - 11:49 pmSJU San Juan Luis Munoz Marin Intl-ONT Ontario
12h 29m2 stops Detroit Metropolitan Wayne County Salt Lake City
$1,512Delta
Booking Insights
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.
Prices
Airlines
More
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?
These monthly figures are based on KAYAK fares from the past 12 months, with extreme outliers removed so each month's typical price is accurate.
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 are the cheapest airlines to fly with from Ontario to Puerto Rico?
Fares reflect aggregated pricing data and may not include every trip type.
Looking at KAYAK data from the last 12 months, the cheapest airlines to fly with from Ontario to Puerto Rico are:
• Frontier (avg. price $376)
• JetBlue (avg. price $524)
• Delta (avg. price $552)
• United Airlines (avg. price $564)
• American Airlines (avg. price $574)
What's the most popular airline to fly with from Ontario to Puerto Rico?
Drawing on KAYAK data from the past three months, the most popular airlines to fly with from Ontario to Puerto Rico are:
• American Airlines
• United Airlines
• Frontier
• Southwest
• JetBlue
What are the most popular flight destinations in Puerto Rico?
San Juan is the most popular flight destination in Puerto Rico, based on KAYAK data from the past 3 months.
Key details for Ontario to Puerto Rico flights
Low season | October |
|---|---|
High season | May |
Cheapest flight | $142 |
Your Ontario to Puerto Rico flight questions, answered
Find helpful answers about this route, including flight times, airports, airlines and booking tips.
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.Reviews of the top 4 airlines serving from Ontario to Puerto Rico
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
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
Information on your arrival and departure airports
Cabin class types available on flights to Puerto Rico
Cabin classes available on flights to Puerto Rico. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Flights from other airports in Ontario to Puerto Rico
Flights from all airports in Ontario to Puerto Rico. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Flights to other popular destinations
The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.