Caribbean

$148+ 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 6/8. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Mar 15 — Mar 221
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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 February 13, 2026.

This American Airlines deal was found by Cheapflights users on 2/12. 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.
Fri 4/2410:26 pm
ONT
-
SJU
1 stop19h 25m
American Airlines
Fri 5/111:59 pm
SJU
-
ONT
2 stops14h 35m
American Airlines
Deal found 2/12$294
This United Airlines deal was found by Cheapflights users on 2/12. 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 5/56:00 am
ONT
-
SJU
2 stops12h 24m
United Airlines
Tue 5/127:20 am
SJU
-
ONT
2 stops16h 16m
United Airlines
Deal found 2/12$320
This Delta deal was found by Cheapflights users on 2/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/911:04 pm
ONT
-
SJU
1 stop9h 42m
Delta
Thu 5/1412:50 pm
SJU
-
ONT
1 stop12h 04m
Delta
Deal found 2/12$346
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:00 am
ONT
-
SJU
1 stop12h 23m
Delta
Wed 9/167:30 am
SJU
-
ONT
1 stop13h 31m
Delta
Deal found 2/11$347
This American Airlines deal was found by Cheapflights users on 2/10. 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 3/15:02 pm
ONT
-
SJU
2 stops12h 58m
American Airlines
Thu 3/58:40 am
SJU
-
ONT
1 stop16h 44m
American Airlines
Deal found 2/10$352
This American Airlines deal was found by Cheapflights users on 2/12. 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.
Mon 8/310:10 pm
ONT
-
MBJ
1 stop15h 10m
American Airlines
Mon 8/104:25 pm
MBJ
-
ONT
2 stops19h 34m
American Airlines
Deal found 2/12$357
This American Airlines deal was found by Cheapflights users on 2/13. 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 4/252:08 pm
ONT
-
MBJ
2 stops19h 43m
American Airlines
Sun 5/312:56 pm
MBJ
-
ONT
2 stops23h 13m
American Airlines
Deal found 2/13$362
This Kiwi.com deal was found by Cheapflights users on 2/11. 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.
Sat 4/117:40 pm
ONT
-
SJU
1 stop12h 27m
Multiple Airlines
Mon 4/2010:55 am
SJU
-
ONT
2 stops40h 00m
Multiple Airlines
Deal found 2/11$363
This Southwest deal was found by Cheapflights users on 2/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/48:45 pm
ONT
-
SJU
2 stops10h 50m
Southwest
Mon 5/185:05 am
SJU
-
ONT
2 stops13h 10m
Southwest
Deal found 2/12$368
This American Airlines deal was found by Cheapflights users on 2/12. 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 5/910:26 pm
ONT
-
SJU
1 stop9h 22m
American Airlines
Fri 5/155:45 am
SJU
-
ONT
2 stops19h 51m
American Airlines
Deal found 2/12$376
This Delta deal was found by Cheapflights users on 2/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/911:04 pm
ONT
-
SJU
1 stop9h 42m
Delta
Wed 5/1312:50 pm
SJU
-
ONT
1 stop12h 04m
Delta
Deal found 2/12$377
This Delta deal was found by Cheapflights users on 2/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/97:00 am
ONT
-
SJU
1 stop12h 23m
Delta
Wed 9/167:30 am
SJU
-
ONT
1 stop13h 31m
Delta
Deal found 2/11$378

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 February 13, 2026.

Round-trip from

$294
(American Airlines)

One-way from

$148
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$431
From Ontario to Caribbean
One-way flight from Ontario to Caribbean
Highest demand for flights based on searches. 8% potential increase in price ($44 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Average for round-trip flights in February 2026

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 February 13, 2026.
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

Sat 5/2

7:00 am-11:50 pm

2 stops13h 50m

San Juan Luis Munoz Marin Intl

Mon 5/11

1:00 am-12:38 pm

2 stops14h 38m

$294

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 5/11

11:04 pm-11:46 am

1 stop9h 42m

San Juan Luis Munoz Marin Intl

Thu 5/14

2:20 pm-9:54 pm

1 stop10h 34m

$346

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/9

11:04 pm-11:46 am

1 stop9h 42m

San Juan Luis Munoz Marin Intl

Thu 5/14

12:50 pm-9:54 pm

1 stop12h 04m

$346

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 5/12

7:05 am-10:17 pm

1 stop12h 12m

San Juan Luis Munoz Marin Intl

Fri 5/15

12:50 pm-9:54 pm

1 stop12h 04m

$346

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 5/8

11:59 pm-9:24 pm

2 stops18h 25m

San Juan Luis Munoz Marin Intl

Fri 5/15

5:45 am-10:36 pm

2 stops19h 51m

$376

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 5/12

7:05 am-10:17 pm

1 stop12h 12m

San Juan Luis Munoz Marin Intl

Sat 5/16

2:20 pm-9:54 pm

1 stop10h 34m

$377

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 5/12

7:00 am-11:50 pm

2 stops13h 50m

San Juan Luis Munoz Marin Intl

Wed 5/13

7:20 am-10:30 pm

2 stops18h 10m

$379

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 5/11

5:00 am-5:38 pm

1 stop9h 38m

San Juan Luis Munoz Marin Intl

Wed 5/13

7:20 am-10:30 pm

2 stops18h 10m

$384

OntarioSimpson Bay

ONT - SXM

ONTSXM

Ontario

Fri 7/24

7:02 pm-12:45 pm

2 stops14h 43m

Simpson Bay Princess Juliana

Tue 7/28

1:45 pm-8:32 am

2 stops21h 47m

$388

OntarioMontego Bay

ONT - MBJ

ONTMBJ

Ontario

Thu 3/5

11:59 pm-1:46 pm

1 stop10h 47m

Montego Bay Sangster Intl

Sun 3/8

1:48 pm-10:18 pm

1 stop10h 30m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/11

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.

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 February 13, 2026.
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.

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

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.

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

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.

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

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.

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

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.

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

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.

Crew

8.6

Overall

8.0

Entertainment

7.5

Food

7.0

Comfort

8.0

Boarding

8.1

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 42m. 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 United Airlines ($142), Delta ($168), and American Airlines ($178).

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

  • 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.

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.

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 February 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$493FlexibilityNo cancel feeOn-time62%
DeltaCheapest$138Average$611FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$321Average$616FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$365Average$686FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$421Average$690FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$465Average$711FlexibilityNo cancel feeOn-time63%

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