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Caribbean Islands

$145+ Cheap flights from Ontario (ONT) to Caribbean Islands

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 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Oct 23 — Oct 301
Thu 10/23
Thu 10/30
1 adult, Economy
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Cheap flight deals from Ontario to Caribbean Islands

Keep the following information in mind while searching for Ontario to Caribbean Islands flight deals. Data was last updated September 23, 2025.

Round-trip from

$314
(Kiwi.com)

One-way from

$145
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$445
From Ontario to Caribbean Islands
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One-way flight from Ontario to Caribbean Islands
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Highest demand for flights based on searches. 11% potential increase in price ($60 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Ontario to Caribbean Islands

Cheapest flights from Ontario to Caribbean Islands
Explore the most affordable flight options available from Ontario to Caribbean Islands. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 23, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2010:47 pmONT - SJU
2 stops37h 37mMultiple Airlines
Thu 10/304:04 pmSJU - ONT
1 stop29h 45mMultiple Airlines
Deal found 9/22$314
This Frontier deal was found by Cheapflights users on 9/22. 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 10/226:53 amONT - SJU
2 stops16h 37mFrontier
Wed 10/299:00 amSJU - ONT
2 stops17h 50mFrontier
Deal found 9/22$339
This Frontier deal was found by Cheapflights users on 9/22. 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 10/1612:32 pmONT - SJU
2 stops16h 23mFrontier
Wed 10/226:22 amSJU - ONT
2 stops20h 28mFrontier
Deal found 9/22$344
This Kiwi.com deal was found by Cheapflights users on 9/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/52:26 pmONT - SJU
1 stop26h 18mMultiple Airlines
Mon 12/83:55 amSJU - ONT
2 stops21h 09mMultiple Airlines
Deal found 9/22$354
This American Airlines deal was found by Cheapflights users on 9/22. 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.
Sun 12/711:59 pmONT - SJU
2 stops13h 53mAmerican Airlines
Thu 12/1111:00 amSJU - ONT
2 stops14h 07mAmerican Airlines
Deal found 9/22$355
This Frontier deal was found by Cheapflights users on 9/22. 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 10/266:44 pmONT - SJU
2 stops15h 18mFrontier
Wed 10/299:00 amSJU - ONT
2 stops17h 50mFrontier
Deal found 9/22$359
This Frontier deal was found by Cheapflights users on 9/22. 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.
Mon 11/38:24 amONT - SJU
2 stops14h 30mFrontier
Wed 11/129:00 amSJU - ONT
2 stops16h 29mFrontier
Deal found 9/22$372
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/215:05 amONT - SJU
1 stop9h 25mUnited Airlines
Tue 10/287:30 amSJU - ONT
2 stops18h 21mUnited Airlines
Deal found 9/22$373
This Frontier deal was found by Cheapflights users on 9/22. 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.
Fri 10/317:44 pmONT - SJU
2 stops19h 10mFrontier
Sun 11/910:39 pmSJU - ONT
2 stops18h 12mFrontier
Deal found 9/22$375
This Kiwi.com deal was found by Cheapflights users on 9/22. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:50 pmONT - SJU
1 stop29h 49mMultiple Airlines
Tue 12/99:30 pmSJU - ONT
2 stops27h 34mMultiple Airlines
Deal found 9/22$376
This Kiwi.com deal was found by Cheapflights users on 9/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:50 pmONT - SJU
1 stop29h 49mMultiple Airlines
Sun 12/145:50 pmSJU - ONT
2 stops26h 06mMultiple Airlines
Deal found 9/21$380
This Frontier deal was found by Cheapflights users on 9/22. 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 10/236:54 pmONT - SJU
2 stops17h 30mFrontier
Sun 10/269:19 pmSJU - ONT
2 stops17h 28mFrontier
Deal found 9/22$381

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Caribbean Islands 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 September 23, 2025.
Use the filters below to find and compare flights from Ontario to Caribbean Islands that are best for you.

Fly from

Ontario

Fly to

Caribbean Islands

Route

Depart

Return

Price

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 10/20

5:05 am-5:30 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Wed 10/29

1:05 am-12:37 pm

2 stops14h 32m

$410

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 10/6

10:56 pm-2:54 pm

1 stop12h 58m

San Juan Luis Munoz Marin Intl

Wed 10/22

1:25 pm-9:29 pm

1 stop11h 04m

$412

OntarioSanto Domingo

ONT - SDQ

ONTSDQ

Ontario

Fri 10/17

10:56 pm-1:28 pm

1 stop11h 32m

Santo Domingo Las Americas

Tue 10/21

8:10 am-9:29 pm

1 stop16h 19m

$439

OntarioPunta Cana

ONT - PUJ

ONTPUJ

Ontario

Sat 10/18

10:56 pm-12:10 pm

1 stop10h 14m

Punta Cana

Wed 10/22

11:30 am-9:29 pm

1 stop12h 59m

$452

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 10/28

7:05 am-9:59 pm

1 stop11h 54m

San Juan Luis Munoz Marin Intl

Fri 11/7

1:46 pm-10:22 pm

1 stop12h 36m

$455

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 10/27

1:00 pm-11:06 am

2 stops19h 06m

San Juan Luis Munoz Marin Intl

Fri 11/7

4:56 pm-8:55 am

2 stops19h 59m

$461

OntarioSanto Domingo

ONT - SDQ

ONTSDQ

Ontario

Sat 12/6

12:46 pm-12:28 pm

2 stops19h 42m

Santo Domingo Las Americas

Sat 12/13

4:58 pm-8:53 am

2 stops19h 55m

$462

OntarioProvidenciales

ONT - PLS

ONTPLS

Ontario

Mon 12/29

11:59 pm-1:55 pm

1 stop10h 56m

Providenciales

Tue 1/6

5:06 pm-12:14 pm

2 stops22h 08m

$476

OntarioProvidenciales

ONT - PLS

ONTPLS

Ontario

Mon 12/29

7:18 pm-2:32 pm

2 stops16h 14m

Providenciales

Tue 1/6

3:45 pm-11:41 am

2 stops22h 56m

$476

OntarioProvidenciales

ONT - PLS

ONTPLS

Ontario

Wed 2/11

1:32 pm-10:10 am

2 stops17h 38m

Providenciales

Wed 2/18

11:45 am-8:24 pm

1 stop11h 39m

$476

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/23

Showing 1-10 of 60 results
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Best time to book a flight from Ontario to Caribbean Islands

Have a flexible travel schedule? Discover the best time to fly to Caribbean Islands 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 Islands

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

Currently, September is the cheapest month in which you can book a flight from Ontario to Caribbean Islands (average of $254). Flying from Ontario to Caribbean Islands in June is currently the most expensive (average of $339). 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 EPX?

Find hourly flight availability from Ontario to Caribbean Islands. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 23, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ontario to Caribbean Islands as you normally would.

Reviews of airlines servicing Caribbean Islands

Get insights into the airlines that provide service to Caribbean Islands. 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 Islands. Reviews last updated September 23, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Ontario to Caribbean Islands have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,973 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,928 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
JetBlue
7.2
Good
2,912 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Comfort

8.0

Food

7.0

Boarding

8.1

Crew

8.6

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Caribbean Islands. 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 Islands?

    If you book a flight to Caribbean Islands 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 Islands?

    There are many flights that can get you from Ontario to Caribbean Islands in 9h 25m. Fly via United Airlines, JetBlue, or Delta to get the fastest option. The distance from Ontario to Caribbean Islands is about 3334 mi. This flight may include one or multiple stops.

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

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $178. However, be on the lookout for offers from Delta and Frontier, as they are both options that can get you from Ontario to Caribbean Islands for a low price.

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

    The most popular flight routes from Ontario to Caribbean Islands are Ontario - San Juan Luis Munoz Marin Intl, Ontario - Punta Cana and Ontario - Montego Bay Sangster Intl.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario to Caribbean Islands 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 Islands?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Caribbean Islands (average of $254). Flying from Ontario to Caribbean Islands in June is currently the most expensive (average of $339). 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.

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Alternative routes for Ontario to Caribbean Islands

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Ontario to Caribbean Islands

Discover the top 6 airlines that operate flights from Ontario to Caribbean Islands. 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 September 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$473FlexibilityNo cancel feeOn-time62%
DeltaCheapest$278Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$365Average$715FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$366Average$643FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$409Average$707FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$522Average$690FlexibilityNo cancel feeOn-time62%

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