$147 Find Cheap Flights from Caribbean 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 to Ontario departing on 12/6. 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

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Everything you should know

Cheapest round-trip
$261
Typical prices: $510-$699
Frontier
Wed 12/24Mon 1/5
SJU - ONT • 1 stop
Cheapest one-way
$113
Typical prices: $176-$382
Frontier
Sat 12/6
SJU - ONT • 2 stops
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Flight Deals
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Flight Deals

Cheap Flights from Caribbean to Ontario

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Caribbean 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 Caribbean to Ontario

Wed, Dec 24 - Mon, Jan 5
Frontier Logo
7:06 pm - 8:53 amSJU-ONT
17h 47m1 stop
Frontier Logo
6:00 pm - 1:42 amONT-SJU
27h 42m2 stops
$261Frontier
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Mon, Dec 22 - Thu, Jan 1
Frontier Logo
3:54 am - 3:46 pmSJU-ONT
15h 52m2 stops
Frontier Logo
4:16 pm - 6:34 amONT-SJU
10h 18m1 stop
$352Frontier
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Wed, Jan 21 - Sat, Jan 24
American Airlines Logo
7:07 am - 6:20 pmSJU-ONT
15h 13m2 stops
American Airlines Logo
7:16 am - 11:59 pmONT-SJU
12h 43m2 stops
$355American Airlines
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Wed, Dec 24 - Mon, Jan 5
Multiple Airlines Logo
7:06 pm - 8:53 amSJU-ONT
17h 47m1 stop
Multiple Airlines Logo
8:14 am - 12:33 amONT-SJU
12h 19m1 stop
$368Multiple Airlines
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Wed, Jan 21 - Sun, Jan 25
Multiple Airlines Logo
7:50 pm - 9:17 pmSJU-ONT
29h 27m2 stops
Multiple Airlines Logo
6:56 pm - 12:27 pmONT-SJU
13h 31m1 stop
$378Multiple Airlines
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Wed, Dec 24 - Mon, Jan 5
American Airlines Logo
5:24 am - 8:58 pmSJU-ONT
19h 34m2 stops
American Airlines Logo
4:47 pm - 10:48 amONT-SJU
14h 01m2 stops
$414American Airlines
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Sat, Dec 6 - Sat, Dec 13
Southwest Logo
6:15 am - 6:35 pmSJU-ONT
16h 20m1 stop
Southwest Logo
10:15 am - 12:30 amONT-SJU
10h 15m2 stops
$428Southwest
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Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
3:46 pm - 9:49 pmSJU-ONT
10h 03m1 stop
United Airlines Logo
6:00 am - 9:26 pmONT-SJU
11h 26m1 stop
$445United Airlines
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Fri, Dec 19 - Sun, Jan 4
Southwest Logo
1:50 pm - 10:20 pmMBJ-ONT
11h 30m2 stops
Southwest Logo
9:20 pm - 2:55 pmONT-MBJ
14h 35m2 stops
$461Southwest
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Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
3:46 pm - 9:49 pmSJU-ONT
10h 03m1 stop
United Airlines Logo
5:05 am - 10:22 pmONT-SJU
13h 17m2 stops
$480United Airlines
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Good to know

Low seasonApril
Cheapest flight$113
Best time to beat the crowds but there is an average 21% increase in price.
Most popular time to fly with an average 2% increase in price.
Flight from San Juan to Ontario

FAQs for booking flights from Caribbean to Ontario

  • How does KAYAK find such low prices on flights from Caribbean 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 Caribbean to Ontario.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Ontario from Caribbean 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 Caribbean 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 Caribbean with another airline.

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

 
Need help choosing which airline to fly with from Caribbean 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 9007 reviews
6.6Food
8.1Crew
7.3Comfort
7.1Entertainment
7.7Boarding
Airline reviews

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

10.0 ExcellentKaren, Nov 2025EWR - LAX
Read more United Airlines reviews

Plane boarded early a quickly, was mostly full. We left close to on time. And landed early.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Flight from Rome to SFO was excellent compared To our flight to Europe from SFO. The food was much tastier. You can see how UNITED is skimping, though. Instead of getting something mid flight you had to ask for it. It was not automatically served. There was a cookie at the end of the arrival meal, for example that tasted like it just came out of a box. They used to serve a little container of nuts, now … a tiny container of nuts, mixed with pretzels. This was business class that you really have to pay for! But this is minor complaints compared to the overall. My major complaint is the position of the even numbered seats by the windows. You have to turn around to see your window & the positioning as some other controls are harder to get at. This is compared to the odd number seat that are perfectly aligned.

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

Flight was timely, relatively comfortable, with decent entertainment and food served. Only problem encountered was with the free messaging which I highly appreciate, but it did not work from iphone to non-iphones.

The internet service I paid for didn’t work at all and the flight crew was not very friendly.

Subject: Formal Complaint: Discriminatory and Unprofessional Conduct – Request for Immediate Action & Compensation Dear [Airline Customer Relations Team], I am writing to file a formal complaint regarding my recent travel experience with [Airline], which was by far the worst I have ever encountered. What occurred was not only unprofessional, but in several instances discriminatory, unsafe, and unacceptable. On the first leg of my trip, I arrived only four minutes past check-in. Instead of making any attempt to resolve the matter, your representative flatly denied me boarding and made me wait while she attended to passengers who arrived after me. By the time a manager intervened, it was too late to board, costing me time, money, and unnecessary frustration. The second leg of my trip (Chicago–San Francisco) raised even more serious concerns. From the outset, it was apparent that the staff—particularly two attendants—prioritized Caucasian passengers while dismissing African American and minority passengers. • When a Caucasian passenger in the exit row refused to comply with federal safety requirements, I, as a first responder, immediately offered to switch seats and assume the responsibility. My offer was blatantly ignored, and instead, a Caucasian passenger seated further up was chosen. This was discriminatory and deeply insulting, especially as I was actively de-escalating the situation that could have delayed the flight further. • During a lengthy tarmac delay of over 90 minutes, passengers were given conflicting and unreasonable instructions that created unnecessary distress and tension. • Throughout the flight, a visibly intoxicated passenger directly in front of me was disruptive, rude to others, failed to comply with seatbelt and electronic device rules, and yet faced no enforcement from the crew. In stark contrast, I was singled out for repeated compliance checks even though I was following every rule. This unequal treatment was so obvious that multiple passengers around me spoke up in my defense. This pattern of behavior demonstrated a clear lack of professionalism, disregard for passenger safety, and discriminatory treatment. I expect far better from an airline of your stature. As a paying customer subjected to this unacceptable treatment, I am formally requesting: 1. A full investigation into the conduct of the staff on both flights. 2. A written apology acknowledging the discriminatory and unprofessional behavior I endured. 3. Appropriate compensation for the distress, inconvenience, and mishandling of my travel. If this matter is not addressed promptly and thoroughly, I will have no choice but to escalate my complaint further, including filing with the U.S. Department of Transportation and sharing my experience through other channels. I trust [Airline] will take this complaint seriously and provide a timely resolution.

Check in was quick and easy during early hours. Flight was on time, and customer services was a plus.

I understand that the food on the airplane wouldn’t be fantastic. However, it wasn’t good at all. 😭

The flight was comfortable with the exit row and great service

Wish some foods provided rather than just biscuit/cookie for flight more than 2 hours

We are too tired and frustrated to comment politely at this point

The business class seats are dated and uncomfortable. The space is bare minimum and there is absolutely no privacy. For $4K, this is not what I expect.

The flight crew was rude. We were in first class and no one even offered water until an hour after we were in the air. Horrible experience

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Did not get the seat I selected and paid for.

My flight was delayed for several hours. Sitting at gate 16 for several hours, I got a text from Kayak the gate changed to 9 before it was announced. Very bad communication at each gate from American Airlines employees. I received 10 notifications of delay from Kayak. My vacation started off horrible! I will write to American Airlines corporate office also.

Delayed flight that lead to a missed connection and a 5-hour trip became a 12-hour flight 🙄

There is no room, no gluten free options, or any free internet/entertainment. You have to bring your own tablet or smartphone because there are no screens.

Everything you need to know for your flight to Ontario

Information on the airport you'll fly into in Ontario