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$376+ 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 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
STT — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap 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 September 11, 2025.

Round-trip from

$595
(American Airlines)

One-way from

$376
(United)

Popular in

October

Cheapest in

April

Average price

$780
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. 33% potential increase in price ($300 potential increase over avg. RT price).
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Cheapest flight prices on average. 12% potential price decrease ($64 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This American Airlines deal was found by Cheapflights users on 9/10. 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.
Wed 10/225:20 pmSTT - ONT
2 stops23h 41mAmerican Airlines
Tue 10/282:51 pmONT - STT
2 stops18h 58mAmerican Airlines
Deal found 9/10$595
This United deal was found by Cheapflights users on 9/10. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1712:54 pmSTT - ONT
2 stops11h 30mMultiple Airlines
Sun 11/21:29 pmONT - STT
2 stops18h 31mMultiple Airlines
Deal found 9/10$1,111

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 September 11, 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

Wed 10/22

5:20 pm-2:01 pm

2 stops23h 41m

Ontario

Tue 10/28

2:51 pm-12:49 pm

2 stops18h 58m

$595

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Fri 10/17

12:54 pm-9:24 pm

2 stops11h 30m

Ontario

Sun 11/2

1:29 pm-12:00 pm

2 stops18h 31m

$1,111

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Fri 10/3

1:15 pm-9:24 pm

2 stops11h 09m

$376

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sat 12/6

8:00 am-9:49 pm

2 stops17h 49m

$396

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sun 12/7

3:35 pm-12:17 pm

2 stops24h 42m

$495

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Thu 3/5

1:05 pm-10:45 pm

2 stops13h 40m

$532

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Thu 11/27

1:02 pm-12:37 pm

2 stops27h 35m

$670

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Tue 1/6

1:02 pm-12:14 pm

2 stops27h 12m

$686

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Fri 11/28

8:00 am-8:44 pm

2 stops16h 44m

$769

Saint Thomas IslandOntario

STT - ONT

STTONT

Saint Thomas Island Cyril E King

Sat 11/29

12:01 pm-9:49 pm

2 stops13h 48m

$1,049

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 11 results
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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, August is the cheapest month in which you can book a flight from Saint Thomas Island to Ontario (average of $246). Flying from Saint Thomas Island to Ontario in March is currently the most expensive (average of $328). 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 23h 41m. American Airlines provides one of the quickest options available for as low as $595. 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, August is the cheapest month in which you can book a flight from Saint Thomas Island to Ontario (average of $246). Flying from Saint Thomas Island to Ontario in March is currently the most expensive (average of $328). 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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