HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Caribbean Islands

$183+ Cheap flights from Ontario (ONT) to Caribbean Islands

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 6/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — SJU
Jun 10 — Jun 171
Tue 6/10
Tue 6/17
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario to Caribbean Islands with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Ontario to Caribbean Islands

Keep the following information in mind while searching for Ontario to Caribbean Islands flight deals. Data was last updated June 5, 2025.

Round-trip from

$348
(Frontier)

One-way from

$183
(United Airlines)

Popular in

December

Cheapest in

October

Average price

$490
From Ontario to Caribbean Islands
Search Deals
One-way flight from Ontario to Caribbean Islands
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($52 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find flight deals from Ontario to Caribbean Islands

Cheapest flights from Ontario to Caribbean Islands
Explore the most affordable flight options available from Ontario to Caribbean Islands. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 5, 2025.

This Frontier deal was found by Cheapflights users on 6/4. 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 9/77:35 pmONT - SJU
2 stops15h 40mFrontier
Thu 9/119:39 pmSJU - ONT
2 stops24h 01mFrontier
Deal found 6/4$348
This United Airlines deal was found by Cheapflights users on 6/4. 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.
Fri 9/196:04 amONT - SJU
1 stop11h 34mUnited Airlines
Tue 9/237:00 amSJU - ONT
2 stops16h 33mUnited Airlines
Deal found 6/4$369
This American Airlines deal was found by Cheapflights users on 6/4. 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 9/2111:59 pmONT - SJU
2 stops15h 11mAmerican Airlines
Tue 9/236:10 amSJU - ONT
2 stops19h 25mAmerican Airlines
Deal found 6/4$376
This JetBlue deal was found by Cheapflights users on 6/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2810:56 pmONT - SJU
1 stop10h 44mJetBlue
Wed 10/812:50 pmSJU - ONT
1 stop11h 39mJetBlue
Deal found 6/2$400
This JetBlue deal was found by Cheapflights users on 6/4. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/710:56 pmONT - PUJ
1 stop13h 29mJetBlue
Thu 9/1111:30 amPUJ - ONT
1 stop12h 59mJetBlue
Deal found 6/4$505
This Delta deal was found by Cheapflights users on 6/3. 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 9/207:00 amONT - SJU
1 stop12h 08mDelta
Mon 9/222:28 pmSJU - ONT
1 stop11h 13mDelta
Deal found 6/3$510
This American Airlines deal was found by Cheapflights users on 6/5. 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 9/1910:35 pmONT - PUJ
1 stop12h 50mAmerican Airlines
Sat 9/2712:59 pmPUJ - ONT
1 stop11h 21mAmerican Airlines
Deal found 6/5$515
This JetBlue deal was found by Cheapflights users on 6/2. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/2811:59 pmONT - AUA
1 stop11h 11mJetBlue
Thu 7/3112:20 pmAUA - ONT
1 stop12h 39mJetBlue
Deal found 6/2$517
This JetBlue deal was found by Cheapflights users on 6/5. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1610:56 pmONT - SDQ
1 stop14h 59mJetBlue
Fri 9/2612:35 pmSDQ - ONT
1 stop11h 54mJetBlue
Deal found 6/5$537
This JetBlue deal was found by Cheapflights users on 6/5. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1011:59 pmONT - SXM
1 stop10h 32mJetBlue
Tue 7/1512:25 pmSXM - ONT
1 stop12h 34mJetBlue
Deal found 6/5$539
This Southwest deal was found by Cheapflights users on 6/3. 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.
Wed 7/98:30 amONT - SJU
2 stops12h 25mSouthwest
Wed 7/236:30 amSJU - ONT
1 stop11h 35mSouthwest
Deal found 6/3$540
This Delta deal was found by Cheapflights users on 6/3. 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.
Sun 7/2010:05 pmONT - NAS
1 stop10h 43mDelta
Tue 7/295:17 pmNAS - ONT
1 stop8h 10mDelta
Deal found 6/3$551

Cheapflights Fare Finder

Customize your flight search to find flights from Ontario to Caribbean Islands 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 June 5, 2025.
Use the filters below to find and compare flights from Ontario to Caribbean Islands that are best for you.

Fly from

Ontario

Fly to

Caribbean Islands

Route

Depart

Return

Price

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 9/7

7:35 pm-2:15 pm

2 stops15h 40m

San Juan Luis Munoz Marin Intl

Thu 9/11

9:39 pm-6:40 pm

2 stops24h 01m

$348

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Fri 9/19

6:04 am-8:38 pm

1 stop11h 34m

San Juan Luis Munoz Marin Intl

Tue 9/23

7:00 am-8:33 pm

2 stops16h 33m

$369

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 9/21

11:59 pm-6:10 pm

2 stops15h 11m

San Juan Luis Munoz Marin Intl

Tue 9/23

6:10 am-10:35 pm

2 stops19h 25m

$376

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Sun 9/28

10:56 pm-2:54 pm

1 stop12h 58m

San Juan Luis Munoz Marin Intl

Fri 10/3

12:50 pm-9:29 pm

1 stop11h 39m

$400

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Mon 9/1

4:58 pm-1:15 pm

2 stops17h 17m

San Juan Luis Munoz Marin Intl

Fri 9/5

2:25 pm-11:40 pm

2 stops12h 15m

$411

OntarioOranjestad

ONT - AUA

ONTAUA

Ontario

Mon 7/28

11:59 pm-2:10 pm

1 stop11h 11m

Oranjestad Reina Beatrix

Thu 7/31

12:20 pm-9:59 pm

1 stop12h 39m

$517

OntarioPunta Cana

ONT - PUJ

ONTPUJ

Ontario

Mon 7/28

7:05 pm-2:59 pm

2 stops16h 54m

Punta Cana

Fri 8/1

4:55 pm-10:01 am

2 stops20h 06m

$519

OntarioSanto Domingo

ONT - SDQ

ONTSDQ

Ontario

Tue 9/16

10:56 pm-4:55 pm

1 stop14h 59m

Santo Domingo Las Americas

Fri 9/26

12:35 pm-9:29 pm

1 stop11h 54m

$537

OntarioSimpson Bay

ONT - SXM

ONTSXM

Ontario

Thu 7/10

11:59 pm-1:31 pm

1 stop10h 32m

Simpson Bay Princess Juliana

Tue 7/15

12:25 pm-9:59 pm

1 stop12h 34m

$539

OntarioSan Juan

ONT - SJU

ONTSJU

Ontario

Wed 7/9

8:30 am-11:55 pm

2 stops12h 25m

San Juan Luis Munoz Marin Intl

Wed 7/23

6:30 am-3:05 pm

1 stop11h 35m

$540

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/3

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from Ontario to Caribbean Islands

Have a flexible travel schedule? Discover the best time to fly to Caribbean Islands 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 Islands

What is the cheapest month to book a flight from Ontario to Caribbean Islands?

Currently, September is the cheapest month in which you can book a flight from Ontario to Caribbean Islands (average of $254). Flying from Ontario to Caribbean Islands 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 EPX?

Find hourly flight availability from Ontario to Caribbean Islands. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 5, 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 Islands as you normally would.

Rainfall in Caribbean Islands by month

Plan your trip to Caribbean Islands by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Caribbean Islands ranges from 2.2 - 6.1 inches per month. November is typically the wettest month, when rainfall can reach 6.1 in. February is typically the driest time to visit Caribbean Islands when rainfall is around 2.2 in.

Temperature in Caribbean Islands by month

Plan your trip to Caribbean Islands by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Caribbean Islands, use this chart to help with planning. For those seeking warmer temperatures, June is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 77.0 F).

Reviews of airlines servicing Caribbean Islands

Get insights into the airlines that provide service to Caribbean Islands. 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 Islands. Reviews last updated June 5, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from Ontario to Caribbean Islands by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,288 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,958 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,774 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
JetBlue
7.3
Good
2,928 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.9

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Caribbean Islands. 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 Islands?

    If you book a flight to Caribbean Islands 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.

  • What are the cheapest airlines to fly from Ontario to Caribbean Islands one-way?

    The cheapest airline one-way is United Airlines, with whom users have recently found tickets for as low as $183. However, be on the lookout for offers from American Airlines and JetBlue, as they are both options that can get you from Ontario to Caribbean Islands for a low price.

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

    The most popular flight routes from Ontario to Caribbean Islands are Ontario - San Juan Luis Munoz Marin Intl, Ontario - Punta Cana and Ontario - Montego Bay Sangster Intl.

  • Can I find deals for flights from Ontario to Caribbean Islands that include hotel bookings?

    Yes. In addition to deals on Ontario to Caribbean Islands flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Caribbean Islands?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Caribbean Islands.

  • Can I find deals for business class flights from Ontario to Caribbean Islands?

    Yes. Cheapflights offers flight deals from Ontario to Caribbean Islands 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 Islands?

    Currently, September is the cheapest month in which you can book a flight from Ontario to Caribbean Islands (average of $254). Flying from Ontario to Caribbean Islands 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ontario to Caribbean Islands

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Los Angeles to Seattle flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Newark flights
Los Angeles to Honolulu flights
San Francisco to Seattle flights
San Francisco to Newark flights
Los Angeles to LaGuardia flights
Los Angeles to Dallas/Fort Worth flights
Los Angeles to Cancún flights
Los Angeles to Boston flights
Ontario to Seattle flights
Santa Ana to Seattle flights
Los Angeles to San Jose flights
Ontario to John F Kennedy Intl flights
Los Angeles to O'Hare Intl flights
Los Angeles to Mexico City flights
Los Angeles to Portland flights
Los Angeles to Las Vegas flights
Los Angeles to San Francisco flights
San Francisco to Las Vegas flights
San Francisco to Honolulu flights
Los Angeles to Miami flights
San Francisco to LaGuardia flights
Los Angeles to Orlando flights
San Jose to Los Angeles flights
San Francisco to Los Angeles flights
San Jose to Seattle flights
Santa Ana to Las Vegas flights
San Francisco to O'Hare Intl flights
Santa Ana to Oakland flights
Los Angeles to Reagan-National flights
Oakland to Santa Ana flights
San Francisco to Dallas/Fort Worth flights
Los Angeles to Dulles Intl flights
Los Angeles to Oakland flights
Ontario to Honolulu flights
Los Angeles to Kahului flights
Oakland to Los Angeles flights
Burbank to Newark flights
Burbank to Las Vegas flights
Los Angeles to Denver flights
San Diego to John F Kennedy Intl flights
San Francisco to Boston flights
San Diego to Seattle flights
Oakland to Las Vegas flights
Ontario to O'Hare Intl flights
San Francisco to Cancún flights
San Jose to Las Vegas flights
Los Angeles to San José del Cabo flights

Top 6 airlines flying from Ontario to Caribbean Islands

Discover the top 6 airlines that operate flights from Ontario to Caribbean Islands. 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 June 5, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$84Average$389FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$322Average$613FlexibilityNo cancel feeOn-time69%
DeltaCheapest$334Average$641FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$354Average$699FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$389Average$570FlexibilityNo cancel feeOn-time63%
JetBlueCheapest$490Average$687FlexibilityNo cancel feeOn-time62%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.