Caribbean

$168+ 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 4/19. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Apr 11 — Apr 181
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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 March 12, 2026.

This Frontier deal was found by Cheapflights users on 3/8. 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.
Tue 8/114:15 pm
ONT
-
SJU
1 stop10h 38m
Frontier
Wed 8/196:15 am
SJU
-
ONT
1 stop12h 10m
Frontier
Deal found 3/8$276
This Frontier deal was found by Cheapflights users on 3/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/114:15 pm
ONT
-
SJU
1 stop10h 38m
Frontier
Sat 8/226:15 am
SJU
-
ONT
1 stop12h 10m
Frontier
Deal found 3/10$296
This United Airlines deal was found by Cheapflights users on 3/8. 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.
Sun 4/265:10 am
ONT
-
SJU
1 stop9h 28m
United Airlines
Tue 5/57:20 am
SJU
-
ONT
2 stops16h 16m
United Airlines
Deal found 3/8$314
This Frontier deal was found by Cheapflights users on 3/9. 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 8/154:15 pm
ONT
-
SJU
1 stop10h 38m
Frontier
Sat 8/226:15 am
SJU
-
ONT
1 stop12h 10m
Frontier
Deal found 3/9$316
This American Airlines deal was found by Cheapflights users on 3/10. 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.
Tue 4/284:52 pm
ONT
-
SJU
2 stops13h 21m
American Airlines
Thu 5/711:59 pm
SJU
-
ONT
1 stop13h 10m
American Airlines
Deal found 3/10$334
This Frontier deal was found by Cheapflights users on 3/10. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/154:15 pm
ONT
-
SJU
1 stop10h 38m
Frontier
Wed 8/196:15 am
SJU
-
ONT
1 stop12h 10m
Frontier
Deal found 3/10$336
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/205:10 am
ONT
-
SJU
1 stop9h 28m
United Airlines
Wed 4/227:40 am
SJU
-
ONT
2 stops18h 05m
United Airlines
Deal found 3/8$340
This Frontier deal was found by Cheapflights users on 3/9. 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.
Tue 8/184:15 pm
ONT
-
SJU
1 stop10h 38m
Frontier
Sun 8/236:15 am
SJU
-
ONT
1 stop12h 10m
Frontier
Deal found 3/9$351
This Delta deal was found by Cheapflights users on 3/9. 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 11/147:00 am
ONT
-
SJU
1 stop12h 13m
Delta
Wed 11/181:55 pm
SJU
-
ONT
1 stop12h 19m
Delta
Deal found 3/9$353
This United Airlines deal was found by Cheapflights users on 3/9. 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
1 stop11h 38m
United Airlines
Sat 5/97:40 am
SJU
-
ONT
1 stop13h 21m
United Airlines
Deal found 3/9$354
This Frontier deal was found by Cheapflights users on 3/9. 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 7/274:15 pm
ONT
-
SJU
1 stop10h 38m
Frontier
Wed 8/56:15 am
SJU
-
ONT
1 stop12h 10m
Frontier
Deal found 3/9$356
This United Airlines deal was found by Cheapflights users on 3/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:00 am
ONT
-
SJU
2 stops12h 24m
United Airlines
Wed 5/61:00 am
SJU
-
ONT
2 stops14h 22m
United Airlines
Deal found 3/10$359

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 March 12, 2026.

Round-trip from

$276
(Frontier)

One-way from

$168
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$488
From Ontario to Caribbean
One-way flight from Ontario to Caribbean
Highest demand for flights based on searches. 8% potential increase in price ($40 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Average for round-trip flights in March 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 March 12, 2026.
Use the filters below to find and compare flights from Ontario to Caribbean that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Tue 4/28

6:00 am-9:24 pm

2 stops12h 24m

San Juan Luis Munoz Marin Intl

Wed 5/6

1:00 am-12:22 pm

2 stops14h 22m

$359

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 5/31

4:15 pm-5:53 am

1 stop10h 38m

San Juan Luis Munoz Marin Intl

Sun 6/7

6:15 am-3:25 pm

1 stop12h 10m

$391

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 5/3

7:00 am-8:34 pm

1 stop10h 34m

San Juan Luis Munoz Marin Intl

Fri 5/8

7:20 am-10:35 pm

2 stops18h 15m

$424

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 5/1

9:55 pm-10:25 am

1 stop9h 30m

San Juan Luis Munoz Marin Intl

Fri 5/8

5:05 am-3:15 pm

2 stops13h 10m

$429

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 4/27

6:49 pm-1:45 pm

2 stops15h 56m

San Juan Luis Munoz Marin Intl

Wed 4/29

1:00 am-12:22 pm

2 stops14h 22m

$464

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/2

7:00 am-8:34 pm

1 stop10h 34m

San Juan Luis Munoz Marin Intl

Fri 5/8

7:20 am-10:35 pm

2 stops18h 15m

$464

OntarioMontego Bay

ONT - MBJ

ONTMBJ

Ontario

Sat 4/25

1:34 pm-3:10 pm

2 stops23h 36m

Montego Bay Sangster Intl

Wed 4/29

4:12 pm-12:22 pm

2 stops22h 10m

$487

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/2

7:00 am-8:34 pm

1 stop10h 34m

San Juan Luis Munoz Marin Intl

Sat 5/9

7:40 am-6:01 pm

1 stop13h 21m

$504

OntarioMontego Bay

ONT - MBJ

ONTMBJ

Ontario

Thu 4/23

5:10 am-12:50 pm

2 stops29h 40m

Montego Bay Sangster Intl

Wed 4/29

4:12 pm-12:22 pm

2 stops22h 10m

$507
Quickest round-trip

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sat 5/2

10:15 pm-11:45 am

1 stop10h 30m

San Juan Luis Munoz Marin Intl

Fri 5/8

2:48 pm-9:48 pm

1 stop10h 00m

$513

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $141). 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 March 12, 2026.
Read reviews from past customers who have flown Southwest,United Airlines, andJetBlue 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

Boarding

8.1

Comfort

8.0

Food

7.0

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

Boarding

8.1

Comfort

8.0

Food

7.0

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

Boarding

8.1

Comfort

8.0

Food

7.0

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

Boarding

8.1

Comfort

8.0

Food

7.0

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

Boarding

8.1

Comfort

8.0

Food

7.0

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

Boarding

8.1

Comfort

8.0

Food

7.0

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 30m. 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 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 $141). 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

Browse thousands of different options on Cheapflights for your next trip

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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 March 12, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$73Average$467FlexibilityNo cancel feeOn-time62%
DeltaCheapest$292Average$597FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$321Average$644FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$365Average$669FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$421Average$579FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$445Average$660FlexibilityNo cancel feeOn-time63%

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