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Saint Thomas Island

$306+ Cheap flights from Ontario (ONT) to Saint Thomas Island (STT)

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 3/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STT
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
1 adult, Economy
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Cheap flight deals from Ontario to Saint Thomas Island

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Saint Thomas Island (STT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$596
(Southwest)

One-way from

$306
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$535
Provider with most accurate pricing for Ontario-Saint Thomas Island Cyril E King flight deals.
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Provider most trusted by Cheapflights users for Ontario-Saint Thomas Island Cyril E King flights.
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From Ontario to Saint Thomas Island Cyril E King
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One-way flight from Ontario to Saint Thomas Island Cyril E King
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Highest demand for flights based on searches. 12% potential increase in price ($94 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Find flight deals from Ontario to Saint Thomas Island

Cheapest flights from Ontario to Saint Thomas Island
Explore the most affordable flight options available from Ontario to Saint Thomas Island. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 15, 2026.

This American Airlines deal was found by Cheapflights users on 1/14. 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 3/1911:58 pm
ONT
-
STT
1 stop13h 04m
American Airlines
Sun 3/225:25 pm
STT
-
ONT
2 stops18h 24m
American Airlines
Deal found 1/14$616
This Delta deal was found by Cheapflights users on 1/15. 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.
Mon 2/210:30 pm
ONT
-
STT
1 stop12h 35m
Delta
Thu 2/53:10 pm
STT
-
ONT
1 stop9h 55m
Delta
Deal found 1/15$668
This United Airlines deal was found by Cheapflights users on 1/14. 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 4/156:49 pm
ONT
-
STT
2 stops17h 42m
United Airlines
Thu 4/232:10 pm
STT
-
ONT
1 stop11h 16m
United Airlines
Deal found 1/14$706
This American Airlines deal was found by Cheapflights users on 1/14. 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 5/107:35 pm
ONT
-
STT
2 stops12h 12m
American Airlines
Sat 5/1612:36 pm
STT
-
ONT
2 stops23h 03m
American Airlines
Deal found 1/14$714
This Delta deal was found by Cheapflights users on 1/15. 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.
Thu 1/2910:30 pm
ONT
-
STT
1 stop12h 35m
Delta
Tue 2/33:10 pm
STT
-
ONT
1 stop9h 55m
Delta
Deal found 1/15$720
This United Airlines deal was found by Cheapflights users on 1/14. 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 2/226:37 pm
ONT
-
STT
2 stops17h 41m
United Airlines
Thu 2/261:02 pm
STT
-
ONT
2 stops35h 48m
United Airlines
Deal found 1/14$892
This Delta deal was found by Cheapflights users on 1/15. 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.
Mon 2/25:10 pm
ONT
-
STT
2 stops17h 55m
Delta
Sun 2/83:10 pm
STT
-
ONT
1 stop9h 55m
Delta
Deal found 1/15$954
This American Airlines deal was found by Cheapflights users on 1/15. 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 3/137:59 pm
ONT
-
STT
2 stops13h 17m
American Airlines
Mon 3/162:43 pm
STT
-
ONT
1 stop10h 47m
American Airlines
Deal found 1/15$963

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Saint Thomas Island 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 January 15, 2026.
Use the filters below to find and compare flights from Ontario to Saint Thomas Island that are best for you.

Fly from

Ontario

Fly to

Saint Thomas Island

Route

Depart

Return

Price

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 4/22

10:15 pm-1:59 pm

1 stop12h 44m

Saint Thomas Island Cyril E King

Wed 4/29

1:15 pm-8:58 pm

1 stop10h 43m

$616

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Thu 3/19

7:59 pm-11:12 am

2 stops12h 13m

Saint Thomas Island Cyril E King

Sun 3/22

5:25 pm-8:49 am

2 stops18h 24m

$616

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Tue 2/3

10:30 pm-3:05 pm

1 stop12h 35m

Saint Thomas Island Cyril E King

Thu 2/5

3:10 pm-9:05 pm

1 stop9h 55m

$668

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 2/1

10:30 pm-3:05 pm

1 stop12h 35m

Saint Thomas Island Cyril E King

Thu 2/5

3:10 pm-9:05 pm

1 stop9h 55m

$668

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 4/22

10:15 pm-1:59 pm

1 stop12h 44m

Saint Thomas Island Cyril E King

Thu 4/30

1:15 pm-8:58 pm

1 stop10h 43m

$668

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 4/15

6:49 pm-3:31 pm

2 stops17h 42m

Saint Thomas Island Cyril E King

Thu 4/23

2:10 pm-10:26 pm

1 stop11h 16m

$706

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 5/10

7:35 pm-10:47 am

2 stops12h 12m

Saint Thomas Island Cyril E King

Sat 5/16

12:36 pm-8:39 am

2 stops23h 03m

$714

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Thu 1/29

10:30 pm-3:05 pm

1 stop12h 35m

Saint Thomas Island Cyril E King

Tue 2/3

3:10 pm-9:05 pm

1 stop9h 55m

$720

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 3/28

10:36 pm-11:06 am

1 stop9h 30m

$306

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sat 3/28

10:03 pm-1:26 pm

3 stops36h 23m

$334

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 13 results
1
2

Compare providers for flights from Ontario to Saint Thomas Island

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Saint Thomas Island in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Saint Thomas Island flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Ontario-Saint Thomas Island flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Ontario-Saint Thomas Island flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Saint Thomas Island flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Saint Thomas Island flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Saint Thomas Island

Have a flexible travel schedule? Discover the best time to fly to Saint Thomas Island 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 Saint Thomas Island

What is the cheapest month to book a flight from Ontario to Saint Thomas Island?

Currently, March is the cheapest month in which you can book a flight from Ontario to Saint Thomas Island (average of $273). Flying from Ontario to Saint Thomas Island in June is currently the most expensive (average of $479). 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.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Saint Thomas Island. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Ontario to Saint Thomas Island?

    There are many flights that can get you from Ontario to Saint Thomas Island in 12h 13m. Fly via Delta or American Airlines to get the fastest option. The distance from Ontario to Saint Thomas Island is about 3396 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Ontario to Saint Thomas Island that include hotel bookings?

    Yes. In addition to deals on Ontario to Saint Thomas Island flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Saint Thomas Island?

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

  • Can I find deals for business class flights from Ontario to Saint Thomas Island?

    Yes. Cheapflights offers flight deals from Ontario to Saint Thomas Island 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 Saint Thomas Island?

    Currently, March is the cheapest month in which you can book a flight from Ontario to Saint Thomas Island (average of $273). Flying from Ontario to Saint Thomas Island in June is currently the most expensive (average of $479). 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

Traveling to a place near Saint Thomas Island?

Book flights to Saint Thomas Island if you plan to visit one of these locations
St. John

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