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Saint Thomas Island

$341+ 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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — STT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
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 August 14, 2025.

Round-trip from

$595
(American Airlines)

One-way from

$341
(United Airlines)

Popular in

June

Cheapest in

February

Average price

$615
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. 8% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 14, 2025.

This American Airlines deal was found by Cheapflights users on 8/13. 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 9/1812:45 pmONT - STT
2 stops21h 05mAmerican Airlines
Mon 9/225:10 pmSTT - ONT
2 stops21h 47mAmerican Airlines
Deal found 8/13$595
This United deal was found by Cheapflights users on 8/13. 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 9/266:27 pmONT - STT
2 stops14h 11mMultiple Airlines
Tue 9/307:49 amSTT - ONT
2 stops15h 35mMultiple Airlines
Deal found 8/13$686
This United Airlines deal was found by Cheapflights users on 8/13. 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 11/246:38 pmONT - STT
2 stops13h 22mUnited Airlines
Sat 12/63:35 pmSTT - ONT
1 stop10h 14mUnited Airlines
Deal found 8/13$707
This American Airlines deal was found by Cheapflights users on 8/13. 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 9/810:35 pmONT - STT
2 stops11h 15mAmerican Airlines
Mon 9/221:40 pmSTT - ONT
2 stops11h 53mAmerican Airlines
Deal found 8/13$716
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Mon 11/106:38 pmONT - STT
2 stops13h 22mUnited Airlines
Sat 11/153:05 pmSTT - ONT
1 stop11h 26mUnited Airlines
Deal found 8/14$802
This United Airlines deal was found by Cheapflights users on 8/13. 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 12/316:39 pmONT - STT
2 stops13h 21mUnited Airlines
Thu 1/83:05 pmSTT - ONT
1 stop11h 21mUnited Airlines
Deal found 8/13$841
This United Airlines deal was found by Cheapflights users on 8/13. 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 12/15:05 amONT - STT
2 stops26h 55mUnited Airlines
Sat 12/63:35 pmSTT - ONT
1 stop10h 14mUnited Airlines
Deal found 8/13$866
This United deal was found by Cheapflights users on 8/13. 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 9/126:38 pmONT - STT
2 stops15h 23mMultiple Airlines
Fri 9/1912:54 pmSTT - ONT
2 stops11h 31mMultiple Airlines
Deal found 8/13$916
This Delta deal was found by Cheapflights users on 8/13. 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 9/1810:00 pmONT - STT
1 stop12h 33mDelta
Mon 9/222:43 pmSTT - ONT
1 stop10h 40mDelta
Deal found 8/13$929
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Fri 12/126:00 amONT - STT
1 stop28h 30mUnited Airlines
Thu 12/253:05 pmSTT - ONT
2 stops30h 38mUnited Airlines
Deal found 8/14$968

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 August 14, 2025.
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

Thu 9/18

12:45 pm-12:50 pm

2 stops21h 05m

Saint Thomas Island Cyril E King

Mon 9/22

5:10 pm-11:57 am

2 stops21h 47m

$595

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 9/26

6:27 pm-11:38 am

2 stops14h 11m

Saint Thomas Island Cyril E King

Tue 9/30

7:49 am-8:24 pm

2 stops15h 35m

$686

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 11/24

6:38 pm-12:00 pm

2 stops13h 22m

Saint Thomas Island Cyril E King

Sat 12/6

3:35 pm-9:49 pm

1 stop10h 14m

$707

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 9/8

10:35 pm-12:50 pm

2 stops11h 15m

Saint Thomas Island Cyril E King

Mon 9/22

1:40 pm-10:33 pm

2 stops11h 53m

$716

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 11/10

6:38 pm-12:00 pm

2 stops13h 22m

Saint Thomas Island Cyril E King

Sat 11/15

3:05 pm-10:31 pm

1 stop11h 26m

$802

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Wed 12/31

6:39 pm-12:00 pm

2 stops13h 21m

Saint Thomas Island Cyril E King

Thu 1/8

3:05 pm-10:26 pm

1 stop11h 21m

$841

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Sun 1/4

6:39 pm-12:00 pm

2 stops13h 21m

Saint Thomas Island Cyril E King

Thu 1/8

3:05 pm-10:26 pm

1 stop11h 21m

$863

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Mon 12/1

5:05 am-12:00 pm

2 stops26h 55m

Saint Thomas Island Cyril E King

Sat 12/6

3:35 pm-9:49 pm

1 stop10h 14m

$866

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Fri 9/12

6:38 pm-11:08 am

2 stops13h 30m

Saint Thomas Island Cyril E King

Fri 9/19

11:15 am-9:25 pm

2 stops13h 10m

$916

OntarioSaint Thomas Island

ONT - STT

ONTSTT

Ontario

Thu 9/18

10:00 pm-1:33 pm

1 stop12h 33m

Saint Thomas Island Cyril E King

Mon 9/22

2:43 pm-10:23 pm

1 stop10h 40m

$929

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 14 results
1
2

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, September is the cheapest month in which you can book a flight from Ontario to Saint Thomas Island (average of $433). Flying from Ontario to Saint Thomas Island in June is currently the most expensive (average of $648). 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.

Reviews of airlines servicing Saint Thomas Island

Get insights into the airlines that provide service to Saint Thomas Island. 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 Saint Thomas Island. Reviews last updated August 14, 2025.
Read reviews from past customers who have flown American Airlines from Ontario to Saint Thomas Island. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.2

Boarding

7.5

Food

6.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Overall

7.2

Entertainment

6.9

Crew

8.0

Comfort

7.2

Boarding

7.5

Food

6.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

MIA - DCA

Flight delayed 5 hours and was told it was due to mechanical issues. Instead of providing lodging due to missed connecting flight, American changed the cause of delay to weather, which meant they were not able required to provide a hotel. To make matters worse, one of our checked bags was lost even though its status said it was “by the plane” but no one at the service desk seemed able to locate it.

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.

  • What is the cheapest airline to fly from Ontario to Saint Thomas Island round-trip?

    Currently priced at $483, American Airlines will fly you from Ontario to Saint Thomas Island and back. In addition to American Airlines, many other airlines offer competitively priced options for your trip.

  • 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, September is the cheapest month in which you can book a flight from Ontario to Saint Thomas Island (average of $433). Flying from Ontario to Saint Thomas Island in June is currently the most expensive (average of $648). 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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Alternative routes for Ontario to Saint Thomas Island

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Top airline flying from Ontario to Saint Thomas Island

Discover the top airline that operate flights from Ontario to Saint Thomas Island. 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$483Average$1,115FlexibilityNo cancel feeOn-time71%

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