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Find cheap flights from Ontario to Puerto Rico from $143

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 7/28. 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
0 bags
Thu 7/11
Thu 7/18

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Best Puerto Rico Flight Deals

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

Aguadilla
Aguadilla2 stops$4,374

Good to know

Low season

October

High season

July

Cheapest flight

$143
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly and prices are also 31% 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 to Puerto Rico from Ontario 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 to Puerto Rico with an airline and back to Ontario 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 to Puerto Rico from Ontario 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

  • On average*, there is no price difference when choosing to fly in the morning or the evening on this flight route.
*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.
8.0
DeltaOverall score based on 10277 reviews
8.6Crew
7.4Food
7.9Comfort
8.2Boarding
8.0Entertainment
Airline reviews

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.

4.0 OkayBrooke, Jun 2024SFO - MSP
Read more about Delta reviews

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!

There was a loud squeaky sound the whole time we were flying.

I didn’t not like that I could not select my seat and ended up with the worse seat.

The landing was bad and the hostess came two times and i was sleeping but when she served the person that nexts to me I woke up and she didn’t even asked me if I need any drink or snacks two times!!!!

Plane was late because of a mechanical malfunction and the food listed as available was not. Flight attendants seem over worked and under paid. They just done seem happy. And that can be seen in their faces.

Waited 3 hours on a plane to de-ice due to manpower issues. Waited another hour and a half once we landed because of a gate issue. Missed my connections. Created. A total of 13 hours of delay.

Great, on time departure, friendly and accommodating crew, great leg room, Smith flight

Plane was turned around due to fog half way into the flight, Delta did not properly direct passengers to stay on same flight and instead failed to properly rebook on Alaska

Honestly, I didn’t expect that I will experience this long time wait during the check in. There was only one person who was taking care of the passengers for the economy class and it took us to wait about one hour to do our check i. As a result we barely get to the airplane as the gate was at the end of the airport. That is totally not professional where one crue is working at the registration desk with economy and 3-4 crues are helping for the business class.

They put me on a chair in between two men, one overweight who was almost falling on top of me, and the other was even uncomfortable because I was half falling because of what the other was pushing me. I stayed with. my feet were swollen from fluid retention and from being unable to accommodate myself. it was very uncomfortable. I asked for help but they told me that the flight was full and they couldn't help me. I got off the plane almost unable to walk due to the inflammation. and then at FLL airport I asked for help because I couldn't go to my next flight, which was a connection.

Great! I love Jet Blue. My favorite airline! Very efficient, clean and timely.

at the time for boarding the lady just call Group A and no other goups and everybody from A to F go inside without the right turn,and when we get in theres no more spsce for carry on , the ones that get in at not correct group from the back occupy our space !!!!! a mess !!!!

The boarding and flight were ok, but there were several painful issues. The flight was 3:20 in the air and almost four hours door to door, but they only had snack packs on the plane. They really need to have food on longer flights or make it clear to everyone that they won’t have food. They also advertise free WiFi, but it did not work for 90% of this flight. Again, almost four hours door to door. If I had known I was flying spirit for JetBlue prices then I would have planned differently.

I really liked the way snacks and drinks were available throughout the flight!!! The flight attendants were also all fantastic!

Best Thing flight took less time than programmed, quick entry and exit. Recommended!

Always like Jet Blue! It seems, however, that people are getting bigger & seats are getting smaller! We had a very full flight and I couldn't get an aisle seat like I always do. I wish there were more leg room. People sitting next to me were very nice though so it was fine to disturb them if I needed to use the restroom. Otherwise the flight was fine but a bit long.

I think the food / snack service was very poor. tehy could have done better. Evrything else was great

No wifi, not even while close to the continental US or Puerto Rico, no entertainment whatsoever (TVs not working). Totally disappointing.

For some reason, the seats on this flight seemed unusually uncomfortable. Speaking with friends who took another JetBlue flight later in the day, they brought up the same issue.

Why does it have to be painful to fly long distances?

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Food is very bad and entertint not too many options ... flight attendet service is not good

Everything was pretty good except for food. They need to improve on it compared to other airlines.

Flight was delayed due to the late arrival of the catering truck, which is quite unacceptable. There was a beverage service, but no pretzel, or cookie, or nuts were served in coach.

I had a great flight. Everything went smoothly and the flight arrived early.

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

On time take off…US cabins look tired and need of refresh!

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Horrible - they lied to me about baggage & boarding, even though I specifically spoke to their agents the day before my flight about my issue. When I showed up they did not let me board and stranded me at my airport until I bought a new flight with money I did not have to spend.

Not sure why JAL partnered with American Airlines because their service is no where near similar. Flight attendants were not friendly and didn’t smile. Food was horrible…

The experience was great and much better than the flight going out. of course I was in first class but the service was excellent

Comfort of seats, ease of boarding. Food selection could be better

Food options were limited which is absolutely embarrassing for a Flight of this size The staff did not come around as much and I am not accustomed to such poor service from American Airlines Drinks I believe were limited to soda and water

Crew were attentive and friendly. Flight was smooth and early! I enjoyed the less crowded plane. Thank you!

We are gluten free, there were not any available complimentary gluten free options.

I strongly dislike Frontier. I find them barebones, the seats not particularly comfortable, the nickel and diming is maddening, the app is TERRIBLE - super confusing to navigate, and the last 4 frontier flights I have flown have been on AVERAGE 2 hours late, one ruining a fancy night out in Vegas with reservations made well in advance, which was nodded to with a measly 5000 miles, which translates to almost nothing. At least credit a free checked bag or something.

8 hr delay. had to buy another ticket with another airline

I appreciated the upgrade to free cary-on bag and seat selection at no charge

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

There were 3 leg for the trip and each leg was delayed by 90 minutes or more. The boarding process takes forever with people waiting on the jetway even though most folks do not have carry-on. The whole process is poorly managed.

They cancelled the flight then did nothing to help us rebook. It was awful - I won’t fly with them again

The process of buying the ticket and navigating all the hidden charges that Frontier throws at you was a terrible experience. The actual airport experience and flying was fine.

The truck that was refueling the plane drove away with the hose still connected to the plane and ripped part of the plane off with it

Terrible. Seats are bad and the baggage policy is inconsistent

Book cheap flights from Ontario to Puerto Rico

Recent round-trip flight deals

6/24Mon
2 stopsFrontier
11h 12mONT-SJU
7/4Thu
2 stopsFrontier
17h 12mSJU-ONT
$294
8/14Wed
2 stopsAmerican Airlines
11h 40mONT-SJU
8/24Sat
2 stopsAmerican Airlines
19h 19mSJU-ONT
$302
7/1Mon
2 stopsFrontier
28h 48mONT-SJU
7/3Wed
2 stopsFrontier
34h 47mSJU-ONT
$329
8/14Wed
1 stopDelta
12h 17mONT-SJU
8/30Fri
1 stopDelta
13h 01mSJU-ONT
$334
8/22Thu
1 stopDelta
12h 17mONT-SJU
8/27Tue
2 stopsDelta
11h 51mSJU-ONT
$347
8/24Sat
1 stopAmerican Airlines
13h 30mONT-SJU
8/27Tue
1 stopAmerican Airlines
15h 23mSJU-ONT
$392
9/10Tue
1 stopJetBlue
12h 22mONT-SJU
9/17Tue
1 stopJetBlue
11h 50mSJU-ONT
$397
8/4Sun
1 stopUnited Airlines
11h 38mONT-SJU
8/18Sun
1 stopUnited Airlines
17h 11mSJU-ONT
$477
11/1Fri
2 stopsUnited Airlines
12h 11mONT-SJU
11/4Mon
1 stopUnited Airlines
10h 06mSJU-ONT
$494
7/9Tue
1 stopJetBlue
13h 04mONT-SJU
7/23Tue
1 stopJetBlue
13h 07mSJU-ONT
$536

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Recent one-way flight deals

7/28Sun
2 stopsFrontier
11h 24mONT-SJU
$143
7/8Mon
2 stopsFrontier
11h 14mONT-SJU
$148
7/9Tue
1 stopJetBlue
13h 04mONT-SJU
$192
7/9Tue
2 stopsAmerican Airlines
19h 45mONT-SJU
$211
6/17Mon
2 stopsAmerican Airlines
14h 14mONT-SJU
$314
6/25Tue
1 stopJetBlue
13h 04mONT-SJU
$340
11/7Thu
2 stopsAlaska Airlines
28h 01mONT-SJU
$342
6/18Tue
1 stopUnited Airlines
9h 13mONT-SJU
$369
7/30Tue
2 stopsUnited Airlines
14h 09mONT-BQN
$372
6/15Sat
2 stopsAlaska Airlines
14h 59mONT-SJU
$3,110

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Last minute flights from Ontario to Puerto Rico

Last minute flight, train and bus deals

6/16Sun
multi-stopFrontier
11h 22mONT-SJU
6/25Tue
multi-stopFrontier
17h 55mSJU-ONT
$308
6/16Sun
multi-stopFrontier
11h 22mONT-SJU
6/20Thu
multi-stopFrontier
32h 16mSJU-ONT
$343
6/14Fri
multi-stopAmerican Airlines
14h 45mONT-SJU
6/22Sat
multi-stopAmerican Airlines
15h 42mSJU-ONT
$675
6/14Fri
multi-stopAmerican Airlines
12h 10mONT-SJU
6/16Sun
multi-stopAmerican Airlines
13h 12mSJU-ONT
$774
6/14Fri
multi-stopJetBlue
10h 44mONT-SJU
6/21Fri
multi-stopJetBlue
14h 19mSJU-ONT
$839
6/13Thu
multi-stopUnited Airlines
9h 13mONT-SJU
6/15Sat
multi-stopUnited Airlines
15h 57mSJU-ONT
$907
6/15Sat
multi-stopJetBlue
11h 26mONT-SJU
6/18Tue
multi-stopJetBlue
13h 08mSJU-ONT
$947
6/15Sat
multi-stopUnited Airlines
9h 13mONT-SJU
6/21Fri
multi-stopUnited Airlines
18h 27mSJU-ONT
$995
6/14Fri
multi-stopAlaska Airlines
25h 04mONT-SJU
6/22Sat
multi-stopAlaska Airlines
15h 26mSJU-ONT
$3,967
6/14Fri
multi-stopAlaska Airlines
15h 14mONT-SJU
6/16Sun
multi-stopAlaska Airlines
16h 10mSJU-ONT
$6,220

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Ontario - Puerto Rico Flights

Departure:

Ontario (ONT)United States

Return flight deals:

Puerto Rico - Ontario

Cabin classes: