Flight to Canada goes via Zurich where there will be a plane change. Do I require a transit visa?

Saketh Rao as long as the terminal is same , not required . Pls recheck if you are landing at Heathrow and your next flight is also from Heathrow

Is transit visa required for London ( No terminal change)if we are going through the below route:

I believe if there is only one layover, a transit visa is not required.

S Singh Bhullar It is only required if the terminals are different

Saketh Rao which site are you booking from?