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$177+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Dec 25 — Jan 11
Thu 12/25
Thu 1/1
1 adult, Economy
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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 November 25, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/23. 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 12/53:20 pmONT - SJU
2 stops19h 38mMultiple Airlines
Sun 12/146:00 amSJU - ONT
1 stop14h 33mMultiple Airlines
Deal found 11/23$356
This Kiwi.com deal was found by Cheapflights users on 11/24. 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 12/122:05 pmONT - SJU
1 stop29h 20mMultiple Airlines
Mon 12/155:09 pmSJU - ONT
2 stops32h 08mMultiple Airlines
Deal found 11/24$400
This Frontier deal was found by Cheapflights users on 11/23. 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 11/23$405
This Frontier deal was found by Cheapflights users on 11/23. 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 11/23$435
This CheapOair deal was found by Cheapflights users on 11/22. 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 CheapOair 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
Sat 12/277:06 pmSJU - ONT
1 stop16h 18mFrontier
Deal found 11/22$439
This Kiwi.com deal was found by Cheapflights users on 11/23. 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.
Wed 12/246:00 amONT - SJU
2 stops40h 34mFrontier
Wed 12/317:06 pmSJU - ONT
1 stop17h 47mFrontier
Deal found 11/23$451
This Kiwi.com deal was found by Cheapflights users on 11/23. 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 12/256:07 pmONT - SJU
2 stops28h 32mFrontier
Wed 12/317:06 pmSJU - ONT
1 stop17h 47mFrontier
Deal found 11/23$481
This Frontier deal was found by Cheapflights users on 11/24. 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 12/123:20 pmONT - MBJ
2 stops21h 31mFrontier
Thu 12/183:47 pmMBJ - ONT
2 stops18h 32mFrontier
Deal found 11/24$486
This United Airlines deal was found by Cheapflights users on 11/23. 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.
Mon 12/86:00 amONT - SJU
1 stop11h 26mUnited Airlines
Fri 12/123:46 pmSJU - ONT
1 stop10h 03mUnited Airlines
Deal found 11/23$489
This Kiwi.com deal was found by Cheapflights users on 11/23. 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 12/266:45 amONT - SJU
2 stops43h 49mFrontier
Wed 12/317:06 pmSJU - ONT
1 stop17h 47mFrontier
Deal found 11/23$492
This Kiwi.com deal was found by Cheapflights users on 11/23. 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 12/254:16 pmONT - SJU
1 stop28h 17mMultiple Airlines
Wed 12/317:06 pmSJU - ONT
1 stop17h 47mMultiple Airlines
Deal found 11/23$493
This United Airlines deal was found by Cheapflights users on 11/24. 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
Sat 1/312:55 pmNAS - ONT
1 stop9h 03mUnited Airlines
Deal found 11/24$503

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 November 25, 2025.

Round-trip from

$283
(United Airlines)

One-way from

$177
(Frontier)

Popular in

December

Cheapest in

October

Average price

$498
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 ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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 November 25, 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 1/18

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Thu 1/22

2:25 pm-8:58 pm

1 stop10h 33m

$283

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 1/20

12:57 pm-10:48 am

2 stops17h 51m

San Juan Luis Munoz Marin Intl

Thu 1/22

7:07 am-2:18 pm

1 stop11h 11m

$361

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 1/15

3:09 pm-6:22 pm

2 stops23h 13m

San Juan Luis Munoz Marin Intl

Thu 1/22

6:00 am-10:48 pm

2 stops20h 48m

$361

OntarioNassau

ONT - NAS

ONTNAS

Ontario

Sat 1/31

3:09 pm-12:12 pm

2 stops18h 03m

Nassau Intl

Wed 2/4

7:45 am-10:48 pm

2 stops18h 03m

$397

OntarioMontego Bay

ONT - MBJ

ONTMBJ

Ontario

Thu 1/8

11:59 pm-3:16 pm

1 stop12h 17m

Montego Bay Sangster Intl

Thu 1/15

4:16 pm-12:03 pm

2 stops22h 47m

$424

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 1/19

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Mon 1/26

2:25 pm-8:58 pm

1 stop10h 33m

$431

OntarioSimpson Bay

ONT - SXM

ONTSXM

Ontario

Sun 1/11

9:59 am-4:28 pm

2 stops26h 29m

Simpson Bay Princess Juliana

Thu 1/15

2:03 pm-9:08 am

2 stops23h 05m

$448

OntarioNassau

ONT - NAS

ONTNAS

Ontario

Mon 2/23

11:59 pm-3:56 pm

1 stop12h 57m

Nassau Intl

Thu 2/26

1:14 pm-9:29 pm

1 stop11h 15m

$471

OntarioSimpson Bay

ONT - SXM

ONTSXM

Ontario

Sat 5/16

11:25 pm-1:28 pm

1 stop11h 03m

Simpson Bay Princess Juliana

Thu 5/21

11:45 am-10:09 pm

1 stop13h 24m

$479

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 2/18

6:37 pm-12:49 pm

2 stops14h 12m

San Juan Luis Munoz Marin Intl

Tue 2/24

2:25 pm-8:50 pm

1 stop10h 25m

$484

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/24

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, April is the cheapest month in which you can book a flight from Ontario to Caribbean (average of $128). 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 November 25, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 19% 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 November 25, 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

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

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
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

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
7.9
Good
7,999 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

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
9,046 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

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
11,038 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

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
3,099 reviews
Southwest
8.0
Very good
4,254 reviews

Food

7.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

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 11h 03m. Ontario and Caribbean are separated by a distance of 3513 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 Frontier ($177), American Airlines ($185), and United Airlines ($187).

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

    The most popular route from Ontario to Caribbean is Ontario - Punta Cana. You may also consider Ontario - San Juan Luis Munoz Marin Intl 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 $128). 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.

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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 November 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$493FlexibilityNo cancel feeOn-time62%
DeltaCheapest$278Average$637FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$355Average$606FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$365Average$701FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$409Average$712FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$573Average$722FlexibilityNo cancel feeOn-time62%

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