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Caribbean

$171+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Ontario to Caribbean

Keep the following information in mind while searching for Ontario to Caribbean flight deals. Data was last updated September 17, 2025.

Round-trip from

$310
(Frontier)

One-way from

$171
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$445
From Ontario to Caribbean
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One-way flight from Ontario to Caribbean
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Highest demand for flights based on searches. 11% potential increase in price ($59 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

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 September 17, 2025.

This Frontier deal was found by Cheapflights users on 9/15. 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 10/205:15 pmONT - SJU
2 stops19h 09mFrontier
Wed 10/221:59 amSJU - ONT
2 stops16h 33mFrontier
Deal found 9/15$310
This Frontier deal was found by Cheapflights users on 9/16. 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 10/258:34 amONT - SJU
2 stops14h 56mFrontier
Fri 11/79:00 amSJU - ONT
2 stops13h 28mFrontier
Deal found 9/16$333
This Frontier deal was found by Cheapflights users on 9/16. 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 stops12h 35mFrontier
Wed 11/59:00 amSJU - ONT
2 stops18h 50mFrontier
Deal found 9/16$349
This American Airlines deal was found by Cheapflights users on 9/16. 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.
Sat 11/110:37 pmONT - SJU
1 stop19h 21mAmerican Airlines
Wed 11/57:15 amSJU - ONT
1 stop10h 47mAmerican Airlines
Deal found 9/16$355
This Frontier deal was found by Cheapflights users on 9/15. 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 11/77:44 pmONT - SJU
2 stops18h 10mFrontier
Fri 11/142:11 amSJU - ONT
2 stops12h 59mFrontier
Deal found 9/15$356
This Frontier deal was found by Cheapflights users on 9/16. 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 11/147:44 pmONT - SJU
2 stops18h 10mFrontier
Sat 11/152:11 amSJU - ONT
2 stops16h 34mFrontier
Deal found 9/16$357
This Frontier deal was found by Cheapflights users on 9/14. 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 11/67:39 amONT - SJU
2 stops13h 53mFrontier
Sat 11/83:59 amSJU - ONT
2 stops18h 50mFrontier
Deal found 9/14$360
This Frontier deal was found by Cheapflights users on 9/14. 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 10/263:40 amSJU - ONT
2 stops15h 48mFrontier
Deal found 9/14$366
This Frontier deal was found by Cheapflights users on 9/17. 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
Fri 10/246:22 amSJU - ONT
2 stops20h 28mFrontier
Deal found 9/17$368
This Frontier deal was found by Cheapflights users on 9/15. 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 9/264:08 pmONT - SJU
2 stops19h 03mFrontier
Sun 9/289:26 pmSJU - ONT
2 stops19h 34mFrontier
Deal found 9/15$372
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Sat 12/610:34 pmONT - SDQ
2 stops14h 49mAmerican Airlines
Sat 12/134:58 pmSDQ - ONT
2 stops20h 56mAmerican Airlines
Deal found 9/15$462
This American Airlines deal was found by Cheapflights users on 9/16. 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 10/2611:59 pmONT - SDQ
2 stops12h 46mAmerican Airlines
Sun 11/23:05 pmSDQ - ONT
2 stops21h 56mAmerican Airlines
Deal found 9/16$466

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 September 17, 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

Mon 11/17

6:38 pm-12:49 pm

2 stops14h 11m

San Juan Luis Munoz Marin Intl

Thu 12/4

2:25 pm-8:42 pm

1 stop10h 17m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 10/28

5:05 am-5:25 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Thu 11/6

2:25 pm-8:44 pm

1 stop10h 19m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 10/3

10:56 pm-12:42 pm

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Fri 10/24

1:25 pm-9:29 pm

1 stop11h 04m

$450

OntarioSanto Domingo

ONT - SDQ

ONTSDQ

Ontario

Sat 12/6

10:34 pm-5:23 pm

2 stops14h 49m

Santo Domingo Las Americas

Sat 12/13

4:58 pm-9:54 am

2 stops20h 56m

$462

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 10/1

6:36 pm-1:45 pm

2 stops16h 09m

San Juan Luis Munoz Marin Intl

Wed 10/8

7:00 am-5:23 pm

2 stops13h 23m

$470

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 10/15

6:00 am-8:38 pm

1 stop11h 38m

San Juan Luis Munoz Marin Intl

Wed 10/22

2:00 pm-8:24 pm

1 stop9h 24m

$480

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 1/7

7:00 am-9:00 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

Sat 1/17

10:15 am-10:53 pm

2 stops16h 38m

$480

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 10/30

7:00 am-8:00 pm

1 stop10h 00m

San Juan Luis Munoz Marin Intl

Sat 11/1

6:45 am-8:44 pm

2 stops16h 59m

$480

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 10/31

5:05 am-5:25 pm

1 stop9h 20m

San Juan Luis Munoz Marin Intl

Mon 11/3

2:25 pm-8:44 pm

1 stop10h 19m

$496

OntarioSanto Domingo

ONT - SDQ

ONTSDQ

Ontario

Tue 10/7

10:56 pm-1:22 pm

1 stop11h 26m

Santo Domingo Las Americas

Wed 10/15

12:47 pm-9:29 pm

1 stop11h 42m

$503

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 60 results
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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, September is the cheapest month in which you can book a flight from Ontario to Caribbean (average of $254). Flying from Ontario to Caribbean 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 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 September 17, 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 as you normally would.

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 September 17, 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
4,242 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

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
4,242 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

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
7,961 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

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
8,926 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

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
4,242 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

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.
Frontier
5.8
Fair
3,173 reviews
Southwest
8.0
Very good
4,242 reviews

Comfort

8.0

Food

7.0

Boarding

8.1

Entertainment

7.5

Overall

8.0

Crew

8.6

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. 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 10h 46m. 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 ($178), JetBlue ($185), and American Airlines ($188).

  • 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 - Montego Bay Sangster 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, September is the cheapest month in which you can book a flight from Ontario to Caribbean (average of $254). Flying from Ontario to Caribbean 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.

See more FAQs

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Alternative routes for Ontario to Caribbean

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

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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$473FlexibilityNo cancel feeOn-time62%
DeltaCheapest$278Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$365Average$706FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$366Average$644FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$409Average$704FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$522Average$690FlexibilityNo cancel feeOn-time62%

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