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$355+ Cheap flights from Saint Thomas Island (STT) to Ontario (ONT)

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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
STT — ONT
Feb 25 — Mar 41
Wed 2/25
Wed 3/4
1 adult, Economy
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Cheap flight deals from Saint Thomas Island to Ontario

One-way flights from Saint Thomas Island to Ontario
Search for one-way flight options from Saint Thomas Island to Ontario. Find affordable one-way fares based on user searches. Data last updated January 26, 2026.

This United Airlines deal was found by Cheapflights users on 1/25. 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.
Sat 2/213:35 pm
STT
-
ONT
1 stop10h 24m
United Airlines
Deal found 1/25$355
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 4/42:36 pm
STT
-
ONT
2 stops36h 20m
Multiple Airlines
Deal found 1/26$359
This Delta deal was found by Cheapflights users on 1/25. 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 2/231:50 pm
STT
-
ONT
1 stop11h 15m
Delta
Deal found 1/25$362
This American Airlines deal was found by Cheapflights users on 1/25. 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 2/233:43 pm
STT
-
ONT
1 stop11h 06m
American Airlines
Deal found 1/25$365
This American Airlines deal was found by Cheapflights users on 1/25. 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 2/216:25 pm
STT
-
ONT
2 stops18h 24m
American Airlines
Deal found 1/25$396
This United Airlines deal was found by Cheapflights users on 1/26. 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 4/144:45 pm
STT
-
ONT
2 stops22h 29m
United Airlines
Deal found 1/26$440
This American Airlines deal was found by Cheapflights users on 1/25. 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 2/222:53 pm
STT
-
ONT
2 stops13h 06m
American Airlines
Deal found 1/25$467
This United Airlines deal was found by Cheapflights users on 1/24. 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 3/1512:02 pm
STT
-
ONT
2 stops27h 16m
United Airlines
Deal found 1/24$687
This American Airlines deal was found by Cheapflights users on 1/26. 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 4/42:28 pm
STT
-
ONT
1 stop12h 31m
American Airlines
Deal found 1/26$696

Find flight deals from Saint Thomas Island to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Saint Thomas Island (STT) to Ontario (ONT). 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 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Popular in

August

Cheapest in

April
Provider with most accurate pricing for Saint Thomas Island Cyril E King-Ontario flight deals.
Search Deals
Provider most trusted by Cheapflights users for Saint Thomas Island Cyril E King-Ontario flights.
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($172 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 13% potential price decrease ($66 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Saint Thomas Island to Ontario 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 26, 2026.
Use the filters below to find and compare flights from Saint Thomas Island to Ontario that are best for you.

Fly from

Saint Thomas Island

Fly to

Ontario

Route

Depart

Return

Price

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sat 2/21

3:35 pm-9:59 pm

1 stop10h 24m

$355

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Tue 4/14

2:10 pm-10:26 pm

1 stop11h 16m

$355

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sat 4/4

2:36 pm-11:56 pm

2 stops36h 20m

$359

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Mon 2/23

1:50 pm-9:05 pm

1 stop11h 15m

$362

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Mon 2/23

3:43 pm-10:49 pm

1 stop11h 06m

$365

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sat 2/21

6:25 pm-8:49 am

2 stops18h 24m

$396

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sun 2/22

2:53 pm-11:59 pm

2 stops13h 06m

$467

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sun 3/15

12:02 pm-12:18 pm

2 stops27h 16m

$687

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/25

Compare providers for flights from Saint Thomas Island to Ontario

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 Saint Thomas Island to Ontario in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust 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 Saint Thomas Island-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Saint Thomas Island-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Saint Thomas Island-Ontario flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Saint Thomas Island-Ontario flights, Cheapflights users trust FlightHub the most. FlightHub 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 Saint Thomas Island-Ontario 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 Saint Thomas Island to Ontario

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

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

Currently, January is the cheapest month in which you can book a flight from Saint Thomas Island to Ontario (average of $304). Flying from Saint Thomas Island to Ontario in August is currently the most expensive (average of $879). 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 Saint Thomas Island to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Saint Thomas Island to Ontario (average of $304). Flying from Saint Thomas Island to Ontario in August is currently the most expensive (average of $879). 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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