HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Caribbean

$119+ Cheap flights from Ontario (ONT) to Caribbean

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/7. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Caribbean with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Caribbean

Cheapest flights from Ontario to Caribbean
Explore the most affordable flight options available from Ontario to Caribbean. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 9, 2025.

This Frontier deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/184:16 pmONT - SJU
1 stop10h 18mFrontier
Mon 12/227:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 12/8$322
This Frontier deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:22 pmONT - SJU
1 stop10h 12mFrontier
Mon 12/297:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 12/9$344
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:41 pmONT - SJU
1 stop9h 53mFrontier
Mon 12/297:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 12/8$356
This Frontier deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/254:16 pmONT - SJU
1 stop10h 18mFrontier
Mon 12/297:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 12/8$405
This Frontier deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/214:41 pmONT - SJU
1 stop9h 53mFrontier
Mon 12/297:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 12/7$435
This Frontier deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/203:27 pmONT - SJU
1 stop11h 07mFrontier
Mon 12/297:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 12/7$455
This American Airlines deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:55 pmONT - MBJ
2 stops20h 30mAmerican Airlines
Thu 1/81:58 pmMBJ - ONT
2 stops23h 10mAmerican Airlines
Deal found 12/7$482
This United Airlines deal was found by Cheapflights users on 12/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/95:05 amONT - SJU
2 stops15h 31mUnited Airlines
Mon 12/157:45 amSJU - ONT
2 stops13h 52mUnited Airlines
Deal found 12/6$494
This CheapOair deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/184:16 pmONT - SJU
1 stop10h 18mFrontier
Sat 12/277:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 12/8$495
This Frontier deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/234:41 pmONT - SJU
1 stop9h 53mFrontier
Thu 1/17:06 pmSJU - ONT
1 stop16h 13mFrontier
Deal found 12/8$506
This United Airlines deal was found by Cheapflights users on 12/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3111:59 pmONT - NAS
1 stop12h 23mUnited Airlines
Wed 1/74:25 pmNAS - ONT
2 stops32h 33mUnited Airlines
Deal found 12/8$526
This United Airlines deal was found by Cheapflights users on 12/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:59 pmONT - NAS
1 stop12h 23mUnited Airlines
Wed 12/312:35 pmNAS - ONT
1 stop10h 17mUnited Airlines
Deal found 12/7$561

Find flight deals from Ontario to Caribbean

Keep the following information in mind while searching for Ontario to Caribbean flight deals. Data was last updated December 9, 2025.

Round-trip from

$283
(American Airlines)

One-way from

$119
(Trip.com)

Popular in

December

Cheapest in

October

Average price

$575
From Ontario to Caribbean
Search Deals
One-way flight from Ontario to Caribbean
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Caribbean that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 9, 2025.
Use the filters below to find and compare flights from Ontario to Caribbean that are best for you.

Fly from

Ontario

Fly to

Caribbean

Route

Depart

Return

Price

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 2/1

6:00 am-10:26 pm

1 stop12h 26m

San Juan Luis Munoz Marin Intl

Thu 2/12

6:15 pm-8:43 am

2 stops18h 28m

$361

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 3/1

10:39 pm-11:41 am

1 stop9h 02m

San Juan Luis Munoz Marin Intl

Sat 3/7

8:15 am-9:06 am

2 stops28h 51m

$361

OntarioSimpson Bay

ONT - SXM

ONTSXM

Ontario

Thu 3/5

7:50 pm-3:15 pm

2 stops15h 25m

Simpson Bay Princess Juliana

Mon 3/9

2:17 pm-10:06 am

2 stops22h 49m

$370

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 2/24

10:20 am-12:35 am

2 stops10h 15m

San Juan Luis Munoz Marin Intl

Fri 2/27

7:00 am-4:45 pm

2 stops13h 45m

$371

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 2/24

8:00 am-9:26 pm

1 stop9h 26m

San Juan Luis Munoz Marin Intl

Wed 2/25

2:05 am-5:41 pm

3 stops19h 36m

$373

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 2/3

5:05 am-12:36 am

2 stops15h 31m

San Juan Luis Munoz Marin Intl

Tue 2/10

7:45 am-5:43 pm

2 stops13h 58m

$373

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 2/22

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Thu 2/26

3:46 pm-9:59 pm

1 stop10h 13m

$373

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 2/25

8:00 am-9:26 pm

1 stop9h 26m

San Juan Luis Munoz Marin Intl

Wed 3/4

3:46 pm-9:59 pm

1 stop10h 13m

$373

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 4/29

7:00 am-8:34 pm

1 stop10h 34m

San Juan Luis Munoz Marin Intl

Wed 5/6

2:55 pm-9:50 pm

1 stop9h 55m

$373

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 2/23

5:00 am-6:25 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Thu 2/26

3:46 pm-9:59 pm

1 stop10h 13m

$373

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Ontario to Caribbean

Have a flexible travel schedule? Discover the best time to fly to Caribbean from Ontario with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Caribbean

What is the cheapest month to book a flight from Ontario to Caribbean?

Currently, April is the cheapest month in which you can book a flight from Ontario to Caribbean (average of $137). Flying from Ontario to Caribbean in November is currently the most expensive (average of $286). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from ONT to CB?

Find hourly flight availability from Ontario to Caribbean. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 9, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 20% on flights from Ontario to Caribbean by exploring options for tickets in the morning.

Reviews of airlines servicing Caribbean

Get insights into the airlines that provide service to Caribbean. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Caribbean. Reviews last updated December 9, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Ontario to Caribbean. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Delta
7.9
Good
8,011 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
United Airlines
7.4
Good
9,089 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
American Airlines
7.2
Good
11,045 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.
Frontier
5.8
Fair
3,085 reviews
Southwest
8.0
Very good
4,254 reviews

Crew

8.6

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Reviews

1 / 20
10.0
Excellent

William Drew,Nov 2025

SJC - HNL

Flight crew was amazing! Usually they're very good on Southwest, but this crew went above and beyond. I have never ever seen so many rounds of drink service on a flight before.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Caribbean. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ontario to Caribbean?

    If you book a flight to Caribbean from Ontario, you will be flying from Ontario, which is the city’s only airport. Ontario (ONT) is located 3.1 mi from the center of Ontario.

  • How long is the flight from Ontario to Caribbean?

    Departing from Ontario to Caribbean will take you 9h 26m. Ontario and Caribbean are separated by a distance of 3334 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ontario to Caribbean one-way?

    The cheapest airlines for a one-way flight from Ontario to Caribbean are Delta ($168), American Airlines ($172), and United Airlines ($178).

  • What are the most popular routes from Ontario to Caribbean?

    The most popular route from Ontario to Caribbean is Ontario - San Juan Luis Munoz Marin Intl. You may also consider Ontario - Punta Cana or Ontario - Nassau Intl.

  • Can I find deals for flights from Ontario to Caribbean that include hotel bookings?

    Yes. In addition to deals on Ontario to Caribbean flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Caribbean?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Caribbean.

  • Can I find deals for business class flights from Ontario to Caribbean?

    Yes. Cheapflights offers flight deals from Ontario to Caribbean by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ontario to Caribbean?

    Currently, April is the cheapest month in which you can book a flight from Ontario to Caribbean (average of $137). Flying from Ontario to Caribbean in November is currently the most expensive (average of $286). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Caribbean

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Haneda flights
Los Angeles to Newark flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Honolulu flights
Los Angeles to Mexico City flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Narita flights
San Francisco to Newark flights
San Francisco to Las Vegas flights
Los Angeles to LaGuardia flights
Los Angeles to Seattle flights
San Francisco to Los Angeles flights
Los Angeles to San Francisco flights
San Francisco to Honolulu flights
Los Angeles to Miami flights
San Francisco to Haneda flights
Los Angeles to Cancún flights
Los Angeles to Orlando flights
Los Angeles to Fort Lauderdale flights
Ontario to Seattle flights
San Francisco to Cancún flights
Los Angeles to Las Vegas flights
San Francisco to Ontario flights
Los Angeles to O'Hare Intl flights
Burbank to Las Vegas flights
Los Angeles to Manila flights
San Francisco to Dallas/Fort Worth flights
Ontario to San Francisco flights
San Francisco to LaGuardia flights
San Francisco to New Delhi flights
Santa Ana to Las Vegas flights
San Francisco to Narita flights
Ontario to Dallas/Fort Worth flights
San Francisco to Mexico City flights
Los Angeles to Heathrow flights
Los Angeles to Denver flights
Los Angeles to Hobby flights
San Francisco to Santa Ana flights
Santa Ana to Dallas/Fort Worth flights
San Francisco to Miami flights
Los Angeles to Salt Lake City flights
Los Angeles to San Salvador flights
Santa Ana to San Francisco flights
Santa Ana to Seattle flights
San Jose to Las Vegas flights
San Francisco to Sky Harbor Intl flights
San Francisco to Heathrow flights
Los Angeles to Boston flights
Los Angeles to Kahului flights

Top 6 airlines flying from Ontario to Caribbean

Discover the top 6 airlines that operate flights from Ontario to Caribbean. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$493FlexibilityNo cancel feeOn-time62%
DeltaCheapest$138Average$636FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$355Average$612FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$365Average$703FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$480Average$718FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$522Average$690FlexibilityNo cancel feeOn-time62%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.