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$144+ 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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Dec 3 — Dec 101
Wed 12/3
Wed 12/10
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 3, 2025.

This Frontier deal was found by Cheapflights users on 10/31. 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 12/85:18 pmONT - SJU
2 stops21h 05mFrontier
Thu 12/111:59 amSJU - ONT
2 stops18h 34mFrontier
Deal found 10/31$308
This Frontier deal was found by Cheapflights users on 10/30. 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 11/198:00 amONT - SJU
2 stops21h 56mFrontier
Sat 11/227:11 amSJU - ONT
2 stops15h 02mFrontier
Deal found 10/30$312
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/117:33 pmONT - SJU
1 stop25h 02mMultiple Airlines
Sun 12/146:00 amSJU - ONT
1 stop14h 33mMultiple Airlines
Deal found 10/31$327
This Frontier deal was found by Cheapflights users on 10/31. 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 11/164:05 pmONT - SJU
2 stops14h 56mFrontier
Wed 11/193:59 amSJU - ONT
2 stops14h 27mFrontier
Deal found 10/31$340
This Frontier deal was found by Cheapflights users on 10/31. 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 11/107:24 pmONT - SJU
2 stops18h 30mFrontier
Thu 11/1310:39 pmSJU - ONT
2 stops16h 31mFrontier
Deal found 10/31$346
This Frontier deal was found by Cheapflights users on 10/31. 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 11/177:44 pmONT - SJU
2 stops18h 10mFrontier
Mon 11/243:23 pmSJU - ONT
2 stops19h 57mFrontier
Deal found 10/31$347
This Frontier deal was found by Cheapflights users on 10/30. 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 11/107:24 pmONT - SJU
2 stops18h 30mFrontier
Sat 11/154:14 pmSJU - ONT
2 stops18h 13mFrontier
Deal found 10/30$353
This Kiwi.com deal was found by Cheapflights users on 10/31. 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 12/52:05 pmONT - SJU
1 stop29h 20mMultiple Airlines
Thu 12/111:59 amSJU - ONT
2 stops18h 34mMultiple Airlines
Deal found 10/31$354
This American Airlines deal was found by Cheapflights users on 11/1. 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.
Thu 12/410:34 pmONT - SJU
1 stop19h 35mAmerican Airlines
Wed 12/108:20 amSJU - ONT
1 stop15h 19mAmerican Airlines
Deal found 11/1$355
This Frontier deal was found by Cheapflights users on 10/31. 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 11/203:31 pmONT - SJU
2 stops20h 24mFrontier
Thu 11/273:59 amSJU - ONT
2 stops14h 27mFrontier
Deal found 10/31$357
This American Airlines deal was found by Cheapflights users on 11/2. 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 stops11h 28mAmerican Airlines
Sat 12/133:11 pmSDQ - ONT
2 stops21h 42mAmerican Airlines
Deal found 11/2$462
This United Airlines deal was found by Cheapflights users on 11/1. 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 12/26:41 pmONT - NAS
2 stops15h 52mUnited Airlines
Wed 12/102:35 pmNAS - ONT
1 stop10h 14mUnited Airlines
Deal found 11/1$477

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 3, 2025.

Round-trip from

$302
(Frontier)

One-way from

$144
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$488
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 ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 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 3, 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

Fri 12/5

2:05 pm-11:25 pm

1 stop29h 20m

San Juan Luis Munoz Marin Intl

Thu 12/11

1:59 am-4:33 pm

2 stops18h 34m

$354

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 12/4

10:34 pm-10:09 pm

1 stop19h 35m

San Juan Luis Munoz Marin Intl

Wed 12/10

7:00 am-6:17 pm

1 stop15h 17m

$414

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 3/3

5:00 am-6:25 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Thu 3/5

3:46 pm-10:35 pm

1 stop10h 49m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 2/21

6:00 am-9:26 pm

1 stop11h 26m

San Juan Luis Munoz Marin Intl

Fri 2/27

2:05 am-5:41 pm

3 stops19h 36m

$445

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Thu 12/4

6:30 pm-10:25 am

2 stops11h 55m

San Juan Luis Munoz Marin Intl

Wed 12/10

11:20 am-8:55 pm

2 stops13h 35m

$455

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

6:23 pm-12:00 pm

2 stops21h 37m

$462

OntarioSimpson Bay

ONT - SXM

ONTSXM

Ontario

Wed 2/25

7:50 pm-12:40 pm

2 stops12h 50m

Simpson Bay Princess Juliana

Thu 3/5

3:19 pm-10:09 am

2 stops22h 50m

$466

OntarioNassau

ONT - NAS

ONTNAS

Ontario

Tue 12/2

6:41 pm-1:33 pm

2 stops15h 52m

Nassau Intl

Wed 12/10

2:35 pm-9:49 pm

1 stop10h 14m

$477

OntarioNassau

ONT - NAS

ONTNAS

Ontario

Tue 12/2

10:34 pm-1:55 pm

1 stop12h 21m

Nassau Intl

Wed 12/10

1:13 pm-7:39 pm

1 stop9h 26m

$477

OntarioNassau

ONT - NAS

ONTNAS

Ontario

Thu 2/19

6:37 pm-3:22 pm

2 stops17h 45m

Nassau Intl

Tue 2/24

3:35 pm-12:38 pm

2 stops24h 03m

$481

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/31

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 $133). Flying from Ontario to Caribbean in November is currently the most expensive (average of $285). 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 3, 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 3, 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
4,240 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
4,240 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
8,001 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
8,997 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
11,034 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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
3,118 reviews
Southwest
8.0
Very good
4,240 reviews

Boarding

8.1

Entertainment

7.5

Crew

8.6

Food

7.0

Comfort

8.0

Overall

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 9h 25m. 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), United Airlines ($223), and American Airlines ($262).

  • 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 $133). Flying from Ontario to Caribbean in November is currently the most expensive (average of $285). 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 3, 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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