Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Phuket City to Montreal as you normally would.
Phuket City (HKT), located 27.5 km from the city centre, is the airport you fly out of when you book flights from Phuket City to Montreal. 0 airlines have flights from Phuket to Montreal on a regular basis. Booking flights from Phuket City to Montreal should not be difficult; the airport handles an average of 0 outbound flights to Montreal per day.
Yes, there are multiple flights from Phuket City to Montreal for under ฿45,400. The cheapest flight booked recently is on อเมริกันแอร์ไลน์ for just ฿45,352, but on average you can expect to pay ฿45,352.