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Cheap flights from Ontario to Saint Thomas Island from C$ 321

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 27/1. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — STT
14 Jan — 21 Jan1
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 15 December 2025.

Tue 30/129:15 a.m.YUL - STT
1 stop7h 27mUnited Airlines
Tue 3/23:05 p.m.STT - YUL
1 stop7h 37mUnited Airlines
Deal found 15/12C$ 624
Tue 30/126:00 a.m.YUL - STT
1 stop9h 18mUnited Airlines
Thu 5/21:02 p.m.STT - YUL
1 stop7h 46mUnited Airlines
Deal found 14/12C$ 727
Thu 25/126:00 a.m.YUL - STT
1 stop9h 18mUnited Airlines
Tue 3/23:05 p.m.STT - YUL
1 stop7h 37mUnited Airlines
Deal found 14/12C$ 829
Tue 30/128:25 p.m.YUL - STT
2 stops41h 03mMultiple Airlines
Tue 3/25:42 p.m.STT - YUL
1 stop22h 28mMultiple Airlines
Deal found 14/12C$ 856
Tue 30/128:25 p.m.YUL - STT
2 stops41h 03mMultiple Airlines
Sat 31/15:42 p.m.STT - YUL
1 stop22h 28mMultiple Airlines
Deal found 14/12C$ 858
Tue 30/125:25 p.m.YUL - STT
2 stops44h 03mMultiple Airlines
Fri 6/23:57 p.m.STT - YUL
1 stop9h 33mMultiple Airlines
Deal found 14/12C$ 907
Tue 30/125:25 p.m.YUL - STT
2 stops44h 03mMultiple Airlines
Thu 5/25:42 p.m.STT - YUL
1 stop22h 28mMultiple Airlines
Deal found 14/12C$ 914
Tue 30/125:25 p.m.YUL - STT
2 stops44h 03mMultiple Airlines
Sun 1/25:42 p.m.STT - YUL
1 stop22h 28mMultiple Airlines
Deal found 14/12C$ 945
Tue 30/124:35 p.m.YUL - STT
1 stop20h 53mMultiple Airlines
Mon 2/23:57 p.m.STT - YUL
2 stops29h 58mMultiple Airlines
Deal found 14/12C$ 961
Tue 30/127:00 a.m.YUL - STT
1 stop28h 00mAir Canada
Wed 4/25:25 p.m.STT - YUL
1 stop19h 35mAir Canada
Deal found 14/12C$ 962
Sat 20/124:00 p.m.YYZ - STT
2 stops19h 00mAir Canada
Thu 1/16:45 p.m.STT - YYZ
1 stop18h 03mAir Canada
Deal found 14/12C$ 1,678
Fri 26/124:50 p.m.YYZ - STT
2 stops21h 45mMultiple Airlines
Thu 1/112:31 p.m.STT - YYZ
3 stops28h 31mMultiple Airlines
Deal found 13/12C$ 1,764

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 15 December 2025.

Round-trip from

C$ 599

One-way from

C$ 321

Popular in

July

Cheapest in

August

Average price

C$ 1,128
United Airlines
  • United Airlines
  • 20/2-26/2
  • 2 total stops
  • 17h 04m total
  • Ontario to Saint Thomas Island
Search Deals
27/1
  • 27/1
  • 2 total stops
  • 22h 25m total
  • Ontario to Saint Thomas Island
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (C$ 17 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 December 2025
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 15 December 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

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Fri 20/2

6:00 a.m.-4:18 p.m.

1 stop9h 18m

Saint Thomas Island Cyril E King

Thu 26/2

1:02 p.m.-7:48 p.m.

1 stop7h 46m

C$ 599

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Mon 5/1

8:30 p.m.-11:31 a.m.

1 stop14h 01m

Saint Thomas Island Cyril E King

Thu 15/1

3:57 p.m.-12:11 a.m.

1 stop9h 14m

C$ 610

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Wed 4/2

8:30 p.m.-4:37 p.m.

1 stop19h 07m

Saint Thomas Island Cyril E King

Mon 9/2

5:42 p.m.-11:28 a.m.

1 stop18h 46m

C$ 610

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Wed 11/3

6:45 a.m.-3:18 p.m.

1 stop8h 33m

Saint Thomas Island Cyril E King

Tue 17/3

2:05 p.m.-11:58 p.m.

1 stop9h 53m

C$ 620

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Thu 1/1

8:20 p.m.-2:28 p.m.

1 stop17h 08m

Saint Thomas Island Cyril E King

Sun 11/1

5:42 p.m.-8:11 p.m.

2 stops27h 29m

C$ 691

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Thu 15/1

6:45 a.m.-4:37 p.m.

1 stop8h 52m

Saint Thomas Island Cyril E King

Thu 22/1

3:57 p.m.-12:43 a.m.

2 stops33h 46m

C$ 691

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Sun 1/3

6:00 a.m.-3:49 p.m.

1 stop8h 49m

Saint Thomas Island Cyril E King

Fri 6/3

6:36 p.m.-11:59 a.m.

2 stops18h 23m

C$ 739

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Wed 4/2

7:00 a.m.-2:36 p.m.

1 stop6h 36m

Saint Thomas Island Cyril E King

Mon 9/2

6:39 p.m.-11:59 a.m.

2 stops18h 20m

C$ 742

MontrealSaint Thomas Island

YUL - STT

YULSTT

Montreal Pierre Elliott Trudeau Intl

Sun 1/3

7:12 a.m.-3:49 p.m.

1 stop7h 37m

Saint Thomas Island Cyril E King

Mon 9/3

4:42 p.m.-12:24 p.m.

2 stops19h 42m

C$ 782

TorontoSaint Thomas Island

YYZ - STT

YYZSTT

Toronto Pearson Intl

Fri 2/1

7:10 a.m.-2:28 p.m.

1 stop30h 18m

Saint Thomas Island Cyril E King

Sun 11/1

5:42 p.m.-8:11 p.m.

2 stops27h 29m

C$ 790

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/12

Showing 1-10 of 24 results
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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

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

Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Saint Thomas Island (average of C$ 392). Flying from Region of Ontario to Saint Thomas Island in July is currently the most expensive (average of C$ 1,029). 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.

What is the cheapest time of day to fly from ON to STT?

Find hourly flight availability from Ontario to Saint Thomas Island. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 15 December 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 45% on flights from Region of Ontario to Saint Thomas Island by exploring options for tickets at noon.

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 9h 18m. United Airlines provides one of the quickest options available for as low as C$ 599. 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.

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

    Currently, August is the cheapest month in which you can book a flight from Region of Ontario to Saint Thomas Island (average of C$ 392). Flying from Region of Ontario to Saint Thomas Island in July is currently the most expensive (average of C$ 1,029). 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

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 15 December 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapestC$ 514AverageC$ 783FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapestC$ 531AverageC$ 828FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
DeltaCheapestC$ 571AverageC$ 592FlexibilityNo cancel feeOn-timeN/A
Search Delta 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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