With 75 firm orders for the E195-E2, as well as 25 more options, it appears the aircraft will also be used to bump up capacity on current Dash 8-400 routes.
The new routes from Halifax and Vancouver come two months after the airlines announced plans to align transborder networks and share revenue on Canada-US flights.
The Canadian carrier will return to the Scottish market during the summer 2022 season with two new routes from Toronto and the resumption of flights to Glasgow from Nova Scotia.
'It has become unviable to serve these markets and these decisions were regrettably inevitable as demand is being obliterated by the Atlantic bubble and third-party fee increases,' WestJet president and CEO Ed Sims said.