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$821+ 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 5/22. Fares are subject to change and may not be available on all flights or dates of travel.
STT — ONT
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Saint Thomas Island to Ontario

Cheapest flights from Saint Thomas Island to Ontario
Explore the most affordable flight options available from Saint Thomas Island to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/10. 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.
Mon 12/151:02 pmSTT - ONT
2 stops32h 35mUnited Airlines
Fri 12/191:40 pmONT - STT
2 stops20h 50mUnited Airlines
Deal found 12/10$1,485

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$907
(United Airlines)

One-way from

$821
(United Airlines)

Popular in

August

Cheapest in

April

Average price

$603
Provider with most accurate pricing for Saint Thomas Island Cyril E King-Ontario flight deals.
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Provider most trusted by Cheapflights users for Saint Thomas Island Cyril E King-Ontario flights.
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From Saint Thomas Island Cyril E King to Ontario
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One-way flight from Saint Thomas Island Cyril E King to Ontario
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Highest demand for flights based on searches. 24% potential increase in price ($179 potential increase over avg. RT price).
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Cheapest flight prices on average. 12% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 12, 2025.
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

Fri 2/6

1:02 pm-8:58 pm

2 stops35h 56m

Ontario

Sun 2/8

6:39 pm-4:18 pm

2 stops17h 39m

$907

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Fri 5/22

1:17 pm-9:21 pm

1 stop11h 04m

$821

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 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 Saint Thomas Island-Ontario flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Saint Thomas Island-Ontario flight deals on Cheapflights vs. eDreams >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 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 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, February is the cheapest month in which you can book a flight from Saint Thomas Island to Ontario (average of $313). 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.

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

    A quick flight from Saint Thomas Island to Ontario can take about 35h 56m. United Airlines provides one of the quickest options available for as low as $907. Airlines will cover a distance of 3396 mi.

  • 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, February is the cheapest month in which you can book a flight from Saint Thomas Island to Ontario (average of $313). 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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