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Cheap flights from Ontario to Saint Thomas Island from C$ 290

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STT
19 Apr — 26 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Saint Thomas Island

Enter your travel dates to find the best prices.

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 20 March 2026.

Mon 13/45:15 p.m.
YYZ
-
STT
1 stop20h 11m
Multiple Airlines
Mon 20/410:49 a.m.
STT
-
YYZ
1 stop13h 40m
Multiple Airlines
Deal found 16/3C$ 548
Sun 12/45:25 p.m.
YUL
-
STT
2 stops22h 03m
Multiple Airlines
Tue 21/412:25 p.m.
STT
-
YUL
1 stop26h 45m
Multiple Airlines
Deal found 17/3C$ 622
Sun 12/45:25 p.m.
YUL
-
STT
2 stops22h 03m
Multiple Airlines
Thu 23/45:10 p.m.
STT
-
YUL
1 stop22h 00m
Multiple Airlines
Deal found 17/3C$ 623
Mon 23/37:10 a.m.
YYZ
-
STT
1 stop30h 16m
Multiple Airlines
Tue 31/34:35 p.m.
STT
-
YYZ
1 stop22h 18m
Multiple Airlines
Deal found 15/3C$ 625
Sun 12/45:25 p.m.
YUL
-
STT
2 stops22h 03m
Multiple Airlines
Mon 20/412:25 p.m.
STT
-
YUL
1 stop26h 45m
Multiple Airlines
Deal found 18/3C$ 629
Mon 23/36:45 a.m.
YYZ
-
STT
1 stop8h 33m
Lufthansa
Tue 31/34:45 p.m.
STT
-
YYZ
1 stop7h 09m
Lufthansa
Deal found 19/3C$ 641
Mon 13/46:45 a.m.
YUL
-
STT
1 stop8h 43m
Multiple Airlines
Thu 16/412:25 p.m.
STT
-
YUL
1 stop10h 01m
Multiple Airlines
Deal found 15/3C$ 648
Sun 12/45:25 p.m.
YUL
-
STT
2 stops22h 03m
Multiple Airlines
Sun 19/412:25 p.m.
STT
-
YUL
1 stop26h 45m
Multiple Airlines
Deal found 17/3C$ 649
Tue 14/46:45 a.m.
YUL
-
STT
1 stop8h 43m
Multiple Airlines
Thu 23/45:10 p.m.
STT
-
YUL
1 stop22h 00m
Multiple Airlines
Deal found 17/3C$ 654
Mon 13/46:45 a.m.
YUL
-
STT
1 stop8h 43m
Multiple Airlines
Wed 22/45:10 p.m.
STT
-
YUL
1 stop22h 00m
Multiple Airlines
Deal found 17/3C$ 656
Mon 13/48:00 a.m.
YUL
-
STT
2 stops29h 26m
Multiple Airlines
Mon 20/45:10 p.m.
STT
-
YUL
1 stop22h 00m
Multiple Airlines
Deal found 17/3C$ 658
Wed 15/47:00 a.m.
YYZ
-
STT
1 stop8h 31m
United Airlines
Wed 29/44:45 p.m.
STT
-
YYZ
1 stop7h 09m
United Airlines
Deal found 16/3C$ 662

Find flight deals from Ontario to Saint Thomas Island

Keep the following information in mind while searching for Ontario to Saint Thomas Island flight deals. Data was last updated 20 March 2026.

Round-trip from

C$ 548

One-way from

C$ 290

Popular in

December

Cheapest in

August

Average price

C$ 518
13/4-20/4
  • 13/4-20/4
  • 2 total stops
  • 33h 51m total
  • Ontario to Saint Thomas Island
Search Deals
8/4
  • 8/4
  • 1 total stop
  • 23h 48m total
  • Ontario to Saint Thomas Island
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 250 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (C$ 59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 629,999 searches. Data last updated 20 March 2026.
Use the filters below to find and compare flights from Ontario to Saint Thomas Island that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Sun 12/4

6:45 a.m.-3:28 p.m.

1 stop8h 43m

Saint Thomas Island Cyril E King

Tue 21/4

12:25 p.m.-3:10 p.m.

1 stop26h 45m

C$ 655

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Mon 13/4

6:45 a.m.-3:28 p.m.

1 stop8h 43m

Saint Thomas Island Cyril E King

Thu 23/4

5:10 p.m.-3:10 p.m.

1 stop22h 00m

C$ 656

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Sun 12/4

6:45 a.m.-3:28 p.m.

1 stop8h 43m

Saint Thomas Island Cyril E King

Mon 20/4

5:10 p.m.-3:10 p.m.

1 stop22h 00m

C$ 659

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Mon 13/4

3:40 p.m.-3:28 p.m.

1 stop23h 48m

Saint Thomas Island Cyril E King

Mon 20/4

5:10 p.m.-7:05 p.m.

1 stop25h 55m

C$ 660
Quickest round-trip

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Mon 13/4

6:00 a.m.-1:08 p.m.

1 stop7h 08m

Saint Thomas Island Cyril E King

Thu 16/4

1:22 p.m.-10:06 p.m.

1 stop8h 44m

C$ 663

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Tue 14/4

7:00 a.m.-3:31 p.m.

1 stop8h 31m

Saint Thomas Island Cyril E King

Wed 15/4

2:10 p.m.-11:59 p.m.

1 stop9h 49m

C$ 724

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Mon 20/4

6:00 a.m.-1:08 p.m.

1 stop7h 08m

Saint Thomas Island Cyril E King

Wed 22/4

1:22 p.m.-10:06 p.m.

1 stop8h 44m

C$ 725

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Sun 24/5

6:30 a.m.-1:09 p.m.

1 stop30h 39m

Saint Thomas Island Cyril E King

Sun 31/5

5:10 p.m.-8:55 p.m.

1 stop27h 45m

C$ 729

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Mon 13/4

5:10 p.m.-1:26 p.m.

2 stops20h 16m

Saint Thomas Island Cyril E King

Sun 19/4

12:25 p.m.-3:10 p.m.

1 stop26h 45m

C$ 733

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Mon 13/4

8:05 a.m.-3:28 p.m.

3 stops31h 23m

Saint Thomas Island Cyril E King

Thu 16/4

12:25 p.m.-10:26 p.m.

1 stop10h 01m

C$ 739

Flights are sorted by cheapest round-trip flights first.

Deals found on 18/3

Showing 1-10 of 43 resultsSorted by cheapest first
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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

How much does it cost to fly round-trip from Region of Ontario to Saint Thomas Island?

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 airport do you fly into for flights to Saint Thomas Island from Ontario?

    For a flight from Ontario to Saint Thomas Island, you will be flying into Cyril E King. Saint Thomas Island Cyril E King (STT) is just 4.6 km from the centre of the city.

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

    A quick flight from Region of Ontario to Saint Thomas Island can take about 7h 08m. United Airlines provides one of the quickest options available for as low as C$ 663. The distance between Region of Ontario and Saint Thomas Island is about 3121 km. This flight may include one or multiple stops.

  • What are the most popular routes from Region of Ontario to Saint Thomas Island?

    The most popular flight routes from Region of Ontario to Saint Thomas Island are Toronto Pearson Intl - Saint Thomas Island Cyril E King, Montreal Pierre Elliott Trudeau Intl - Saint Thomas Island Cyril E King and Toronto Island - Saint Thomas Island Cyril E King.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Ontario to Saint Thomas Island

Discover the top 3 airlines 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 629,999 searches. Data last updated 20 March 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapestC$ 394AverageC$ 825FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 570AverageC$ 590FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapestC$ 596AverageC$ 809FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ontario to Saint Thomas Island?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Ontario to Saint Thomas Island. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Saint Thomas Island?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Saint Thomas Island from Ontario.

Can Cheapflights find flights from Ontario to Saint Thomas Island with no change fees?

Yes! Cheapflights helps users easily find flights from Ontario to Saint Thomas Island with no change fees.

Can Cheapflights notify me if prices for flights from Ontario to Saint Thomas Island become cheaper?

Yes, Cheapflights offers price alerts on Ontario to Saint Thomas Island flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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