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Cheap flights from Ontario to Ko Samui from C$ 755

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 9/4. Fares are subject to change and may not be available on all flights or dates of travel.
YYZ — USM
14 Jan — 21 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ontario to Ko Samui

Enter your travel dates to find the best prices.

Cheapest flights from Ontario to Ko Samui
Explore the most affordable flight options available from Ontario to Ko Samui. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 December 2025.

Thu 25/123:10 p.m.YYZ - USM
2 stops28h 40mMultiple Airlines
Thu 8/18:30 a.m.USM - YYZ
3 stops34h 10mMultiple Airlines
Deal found 14/12C$ 3,427
Sun 21/121:55 p.m.YYZ - USM
2 stops38h 45mCathay Pacific
Wed 31/127:55 a.m.USM - YYZ
2 stops25h 05mCathay Pacific
Deal found 12/12C$ 3,643
Sun 21/1212:35 a.m.YYZ - USM
2 stops32h 45mMultiple Airlines
Thu 8/18:30 a.m.USM - YYZ
3 stops35h 20mMultiple Airlines
Deal found 14/12C$ 3,738
Thu 18/122:45 p.m.YYZ - USM
2 stops29h 05mMultiple Airlines
Mon 29/127:55 a.m.USM - YYZ
2 stops61h 25mMultiple Airlines
Deal found 12/12C$ 3,982
Sun 21/1212:35 a.m.YYZ - USM
2 stops31h 50mMultiple Airlines
Tue 6/17:35 p.m.USM - YYZ
3 stops47h 05mMultiple Airlines
Deal found 14/12C$ 3,988
Sun 21/126:30 a.m.YYZ - USM
3 stops37h 30mMultiple Airlines
Tue 30/128:15 a.m.USM - YYZ
3 stops42h 19mMultiple Airlines
Deal found 12/12C$ 4,015

Find flight deals from Ontario to Ko Samui

Keep the following information in mind while searching for Ontario to Ko Samui flight deals. Data was last updated 15 December 2025.

Round-trip from

C$ 1,585

One-way from

C$ 755
11/1-21/1
  • 11/1-21/1
  • 4 total stops
  • 73h 40m total
  • Ontario to Ko Samui
Search Deals
9/4
  • 9/4
  • 3 total stops
  • 54h 40m total
  • Ontario to Ko Samui
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario to Ko Samui 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 Ko Samui that are best for you.

Fly from

Ontario

Fly to

Ko Samui

Route

Depart

Return

Price

MontrealKo Samui

YUL - USM

YULUSM

Montreal Pierre Elliott Trudeau Intl

Mon 26/1

7:30 a.m.-7:45 a.m.

3 stops36h 15m

Ko Samui

Mon 23/2

7:35 p.m.-5:05 p.m.

2 stops33h 30m

C$ 1,605

TorontoKo Samui

YYZ - USM

YYZUSM

Toronto Pearson Intl

Sat 14/2

10:35 p.m.-6:50 p.m.

2 stops56h 15m

Ko Samui

Thu 26/2

6:05 p.m.-4:49 p.m.

2 stops34h 44m

C$ 1,681

TorontoKo Samui

YYZ - USM

YYZUSM

Toronto Pearson Intl

Sun 22/2

6:45 p.m.-10:35 a.m.

2 stops27h 50m

Ko Samui

Sun 1/3

6:30 p.m.-7:25 p.m.

2 stops36h 55m

C$ 1,684

MontrealKo Samui

YUL - USM

YULUSM

Montreal Pierre Elliott Trudeau Intl

Mon 16/2

7:30 a.m.-7:35 a.m.

3 stops36h 05m

Ko Samui

Tue 31/3

6:25 p.m.-5:05 p.m.

2 stops33h 40m

C$ 1,844

TorontoKo Samui

YYZ - USM

YYZUSM

Toronto Pearson Intl

Sat 2/5

1:45 a.m.-4:35 p.m.

2 stops27h 50m

Ko Samui

Thu 7/5

9:15 a.m.-9:35 p.m.

2 stops23h 20m

C$ 1,990

TorontoKo Samui

YYZ - USM

YYZUSM

Toronto Pearson Intl

Fri 23/1

12:15 a.m.-3:40 p.m.

2 stops27h 25m

Ko Samui

Sat 21/2

8:15 a.m.-8:20 p.m.

2 stops48h 05m

C$ 2,177

MontrealKo Samui

YUL - USM

YULUSM

Montreal Pierre Elliott Trudeau Intl

Wed 18/2

8:50 p.m.-10:35 a.m.

2 stops25h 45m

Ko Samui

Fri 6/3

7:10 p.m.-2:05 p.m.

2 stops54h 55m

C$ 2,221

TorontoKo Samui

YYZ - USM

YYZUSM

Toronto Pearson Intl

Sat 14/2

8:10 p.m.-9:20 a.m.

2 stops25h 10m

Ko Samui

Sat 21/2

7:30 p.m.-2:40 p.m.

2 stops55h 10m

C$ 2,225

MontrealKo Samui

YUL - USM

YULUSM

Montreal Pierre Elliott Trudeau Intl

Wed 25/2

8:50 p.m.-4:25 p.m.

2 stops31h 35m

Ko Samui

Sat 7/3

8:20 p.m.-2:05 p.m.

2 stops53h 45m

C$ 2,253

TorontoKo Samui

YYZ - USM

YYZUSM

Toronto Pearson Intl

Sat 31/1

10:35 p.m.-7:30 a.m.

3 stops44h 55m

Ko Samui

Sat 28/2

7:35 p.m.-6:40 a.m.

3 stops47h 05m

C$ 2,288

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

Showing 1-10 of 28 results
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Best time to book a flight from Ontario to Ko Samui

Have a flexible travel schedule? Discover the best time to fly to Ko Samui 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 Ko Samui

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

Find hourly flight availability from Ontario to Ko Samui. 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.

It’s typically best to fly out from Region of Ontario to Ko Samui in the afternoon. Doing so could potentially save you 78% on the flight price compared to flying in the evening, which is usually more expensive.

What is the cheapest day to fly from Region of Ontario to Ko Samui?

Use this chart to determine the cheapest time to fly round-trip from Ontario to Ko Samui. Price data was last updated on 30 March 2025.

Travelers seeking maximum savings on their Region of Ontario to Ko Samui flight should consider departing on Saturday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Ko Samui. 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 Ko Samui from Ontario?

    Ko Samui (USM) is the airport you will fly into if you book a flight from Ontario to Ko Samui. It is only a 3.3 km journey from Ko Samui (USM) to Ko Samui’s city centre.

  • How long is the flight from Region of Ontario to Ko Samui?

    Departing from Region of Ontario to Ko Samui will take you 25h 45m. The distance from Region of Ontario to Ko Samui is about 13858 km. This flight may include one or multiple stops.

  • What are the most popular routes from Region of Ontario to Ko Samui?

    The most popular route from Region of Ontario to Ko Samui is Montreal Pierre Elliott Trudeau Intl - Ko Samui. You may also consider Toronto Pearson Intl - Ko Samui or Toronto Island - Ko Samui.

  • Can I find deals for flights from Ontario to Ko Samui that include hotel bookings?

    Yes. In addition to deals on Ontario to Ko Samui flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Ko Samui?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Ko Samui.

  • Can I find deals for business class flights from Ontario to Ko Samui?

    Yes. Cheapflights offers flight deals from Ontario to Ko Samui 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

Travelling to a place near Ko Samui?

Book flights to Ko Samui if you plan to visit one of these locations
Ko Pha Ngan
Ko Tao

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Ko Samui

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Ontario to Ko Samui

Discover the top airline that operate flights from Ontario to Ko Samui. 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
EVA AirCheapestC$ 1,884AverageC$ 2,074FlexibilityNo cancel feeOn-time74%
Search EVA Air 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 Ko Samui?

Cheapflights makes it easy to find Ontario to Ko Samui flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from Ontario to Ko Samui?

Cheapflights simply makes it quick and affordable to book flights from Ontario to Ko Samui by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Ontario to Ko Samui with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ontario to Ko Samui flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from Ontario to Ko Samui become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Ko Samui from Ontario today and book when prices fit your budget.

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