$143 Find Cheap Flights from Ontario to Puerto Rico

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Puerto Rico departing on 4/2. 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.
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Best Puerto Rico Flight Deals from Ontario

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Aguadilla
Aguadilla2 stops$563

Good to know

Low season

November

High season

June

Cheapest flight

$143
Best time to beat the crowds with an average 17% drop in price.
Most popular time to fly and prices are also 32% lower on average.
Flight from Ontario to San Juan

FAQs - booking Puerto Rico flights

  • How does KAYAK find such low prices on flights from Ontario to Puerto Rico?

    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 Ontario to Puerto Rico.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from Ontario to Puerto Rico 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 Ontario to Puerto Rico?

    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 from Ontario to Puerto Rico with an airline and back with another airline.

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

    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 from Ontario to Puerto Rico up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Puerto Rico

  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be February, March and April. The cheapest month to fly from Ontario is June.
  • Morning departure is around 44% cheaper than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 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.
8.1
SouthwestOverall score based on 4331 reviews
8.1Comfort
8.2Boarding
7.1Food
7.6Entertainment
8.7Crew
Airline reviews

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

10.0 ExcellentGabriel, Feb 2025SMF - LAS
Read more Southwest reviews

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

I used to fly SWA all the time. I know the crew has their little acts that are often fun, and entertaining. On this flight one of the crew was just not nice. Very surprising.

The plane arrived 25 minutes late, and the Wi-Fi was slower than it usually is.

Forget beverage, they didn't even have water for half the passangers?

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

My seat was changed at the last minute and I was moved to the last row, right next to the bathroom despite selecting my seat well in advance. I was also made to check my carry on due to space but when I got on the plane there was significant empty overhead space. Picking up my carry on from the luggage carousel added time to my trip which had already been extended due to delay.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

Smooth flight. As always dinner could have been more generous. Breakfast was great.

AWFUL. I have had the experience of traveling with many airlines across the world, and hands down United Airlines is the worst. Not one flight was on time, and I don’t think I met one crew member or staff member who wasn’t rude.

Old and out of date plane, it seem like every time I fly with united there’s and issue. We were delayed,

We took off an hour late due to arrival airport not having enough gates. That was followed by 1:30 wait to get our bags delivered for the entire flight.

For an 8.5 hour flight the service on board lacked a bit. Service start was slow, the food was worse than usual and they skipped the snack they were supposed to deliver before landing.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

Checkin was painful and slow! Lady didn’t seem to know what was going on and couldn’t explain the delay. Seemed ahe couldnt see the computer scree and we couldn’t hear her talk through her mask.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

I paid for what I got which was cheap, I brought my own entertainment. I knew what to expect, so I could be prepared. If you’re flying economy, check in early like me. I have no problems with my flight, was on time, staff were friendly, and overall good experience.

DO NOT BOOK THROUGH AMERICAN AIRLINES IF YOU HAVE ANY ADDITIONAL NEEDS. Great flight, crew etc. it wasn’t full so had space to stretch out Only downside was there was no GF option for my partner. We booked through American and it was a Qantas flight so despite contacting both airlines to confirm, she didn’t have a gluten free meal for the 16 hour flight (nor the flight in the other direction). The flight attendants did their best to accommodate but it was not super substantial.

After several delays and being rebooked onto a layer flight, I had to speak to three AA agents for baggage claim to get an attendant. All were in foul mode and reluctant to assist or offer any assistance.

Multiple maintenance delays and the missed and rebooked connection changed gates at least 6 times including one which had us walking 20 minutes to another terminal and then back again. Seated our family of three in different middle seats throughout the plane and then there was an empty seat next to me. Very long travel day which I would have never agreed to if I knew the itinerary would be changed at 5 am, 2 hours before takeoff.

It was as expected for such a short flight. No complaints

It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.

The flight encountered a delay exceeding 4 hours. The food voucher issued was valued at $12, insufficient to cover our meal expenses. Consequently, I was unable to take my medication, leading to a drop in blood sugar levels and exacerbating my anxiety.

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

The flight left over two hours late. They charged me $180 to bring a carry on. There was an error with the spelling of my name and Frontair agent lied that I would need to pay $200 for her to fix the spelling, and pressured me that if I don't do it quick I would lose the flight. I called back and another agent said it costs $75 to fix. All in all, this company is a complete scam.

I took my first and last flight with FRONTIER. The seats are not able to be reclined so it’s not a very comfortable experience when you take a flight of 3 hours or longer. You must pay for your luggage either carry on or check in, so taking all this in consideration at the end what you think you’re saving your paying in services that should be included. Not a beverage in sight. . You’re seriously better off getting on a proper airline such as Delta, AA, United, etc.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.

The takeoff was the smoothest I've ever experienced on any airline and this is the first time I've flown on frontier so this was an extremely pleasant surprise!

A lady asked to stop the flight after the tunnel pulled away and we began to depart a flight that was already hours late. The attendance respectfully stopped the the plane and had the tunnel return. After the tunnel returned the passenger claimed to have changed her mind . The tunnel was then put in reverse and the passenger remained on the plane .. They should have sent the sick passenger off the plane like initially replaced. They existed a couple off the plane prior to that situation.. So.. all and all.. it was a long and flight.. .

With frontier you get what you pay for. The flight was two hours late. It’s a tight fit for the number of people they bring but you get to where you’re going cheap. Sometimes that’s more important than a nifty drink and cool TV..

Charges unexpected. For seat that didnt recline. Please reverse extra seat and carryon charge. Bad business that is a bait and switch.

We had an awful experience getting our bags checked in. Frontier’s check in on the app manipulated us into buying the business package because that was the only option available for a checked bag which included two checked bags per person which we did not need. Upon arriving to the airport, we stood in line for what seemed like forever at the baggage check in and there was no one available at the counter. We were first in line and we were afraid we were going to miss our flight due to the baggage attendant being late. After realizing there were a lot of other people waiting at the baggage check in and no one available. I reached out to Frontier and could not get any customer service so I had to call the airport to page the baggage attendant to send someone to the counter to check in our bags before we were able to go through security , I finally spoke to the attendant at the counter and explained to her that we had to pay for two checked bags person a total of six bags when we only had a total of three bags between three people she said to reach out to Frontier and they would issue a refund for the three bags that we paid for and did not need. I reached out to Frontier which I was not able to reach anybody by phone so I had to go through their automated chat feature, which sent me around in circles until I finally reached a representative to assist me. I explained to them what happened and they explained that they were not able to assist me. I continued to push the issue with them as this was very frustrating and they finally put in a customer service ticket where we were issued a flight credit and we were so disappointed because after this experience, we NEVER want to fly Frontier again, and we do not want a credit that we will not use. Frontier charged us almost $500 for us to check three bags which is absolutely absurd! The customer service agents were not able to offer anything else other than a flight credit and I do not feel like my frustrations were truly heard , we will never use Frontier Airlines again ! Truly Theft by Manipulation! They should be ashamed!

Book cheap flights from Ontario to Puerto Rico

Recent round-trip flight deals

4/3Thu
2 stopsFrontier
21h 00mONT-SJU
4/8Tue
2 stopsFrontier
26h 00mSJU-ONT
$290
4/4Fri
2 stopsFrontier
13h 52mONT-SJU
4/8Tue
2 stopsFrontier
26h 00mSJU-ONT
$310
4/30Wed
1 stopUnited Airlines
11h 28mONT-SJU
5/2Fri
2 stopsUnited Airlines
16h 20mSJU-ONT
$355
4/30Wed
2 stopsUnited Airlines
14h 47mONT-SJU
5/2Fri
2 stopsUnited Airlines
14h 33mSJU-ONT
$403
5/9Fri
2 stopsDelta
17h 00mONT-SJU
5/16Fri
1 stopDelta
10h 56mSJU-ONT
$405
4/30Wed
1 stopDelta
13h 15mONT-SJU
5/5Mon
1 stopDelta
10h 02mSJU-ONT
$414
3/26Wed
1 stopAmerican Airlines
9h 18mONT-SJU
4/2Wed
1 stopAmerican Airlines
10h 15mSJU-ONT
$463
3/19Wed
2 stopsAmerican Airlines
11h 10mONT-SJU
3/25Tue
1 stopAmerican Airlines
16h 28mSJU-ONT
$480
4/18Fri
2 stopsSouthwest
11h 40mONT-SJU
4/25Fri
2 stopsSouthwest
11h 30mSJU-ONT
$550
6/6Fri
2 stopsSouthwest
11h 45mONT-SJU
6/9Mon
1 stopSouthwest
15h 10mSJU-ONT
$554

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Recent one-way flight deals

4/2Wed
1 stop
9h 31mONT-SJU
$143
4/13Sun
1 stop
12h 10mONT-SJU
$155
5/2Fri
1 stopJetBlue
10h 50mONT-SJU
$163
3/26Wed
1 stopAmerican Airlines
18h 53mONT-SJU
$178
5/4Sun
1 stopJetBlue
14h 15mONT-SJU
$179
3/25Tue
1 stopAmerican Airlines
10h 58mONT-SJU
$213
5/3Sat
1 stopUnited Airlines
11h 30mONT-SJU
$223
4/19Sat
1 stopDelta
8h 08mONT-SJU
$237
8/2Sat
1 stopUnited Airlines
11h 38mONT-SJU
$243
7/31Thu
1 stopDelta
9h 52mONT-SJU
$328

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Last minute flights from Ontario to Puerto Rico

Last minute flight, train and bus deals

3/6Thu
multi-stopDelta
13h 59mONT-SJU
3/10Mon
multi-stopDelta
12h 43mSJU-ONT
$645
3/6Thu
multi-stopDelta
13h 59mONT-SJU
3/10Mon
multi-stopDelta
12h 49mSJU-ONT
$665
3/5Wed
multi-stopUnited Airlines
14h 52mONT-BQN
3/11Tue
multi-stopUnited Airlines
15h 35mBQN-ONT
$685
3/6Thu
multi-stopAmerican Airlines
9h 23mONT-SJU
3/10Mon
multi-stopAmerican Airlines
15h 56mSJU-ONT
$715
3/7Fri
multi-stopUnited Airlines
9h 20mONT-SJU
3/12Wed
multi-stopUnited Airlines
10h 13mSJU-ONT
$735
3/6Thu
multi-stopUnited Airlines
12h 38mONT-SJU
3/7Fri
multi-stopUnited Airlines
10h 32mSJU-ONT
$765
3/6Thu
multi-stopUnited Airlines
9h 20mONT-SJU
3/13Thu
multi-stopUnited Airlines
10h 32mSJU-ONT
$775
3/6Thu
multi-stopAmerican Airlines
9h 23mONT-SJU
3/16Sun
multi-stopAmerican Airlines
16h 28mSJU-ONT
$805
3/7Fri
multi-stopAlaska Airlines
28h 35mONT-SJU
3/12Wed
multi-stopAlaska Airlines
18h 22mSJU-ONT
$1,366
3/7Fri
multi-stopAlaska Airlines
28h 35mONT-SJU
3/10Mon
multi-stopAlaska Airlines
37h 54mSJU-ONT
$1,529

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Everything you need to know for your flight from Ontario to Puerto Rico

Information on your arrival and departure airports

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