KLM677/678 is an interesting route with a bit of a story. Starting service in the 1990’s, KLM decided to take a gamble on connecting Amsterdam with a (at the time) smaller Canadian oil city with a promising business clientele, Calgary. When the oil downturn hit, KLM suspended the service in 1996.
The service returned in 2009, again on a gamble, bearing the flight number KLM677 for EHAM-CYYC, and KLM678 for CYYC-EHAM. This flight number has not changed once since 2009. The route, served by aircraft ranging from the A330 family most commonly, to aircraft like the 787-9 and -10, and even a 777 occasionally. It serves as one of the busiest connections to Europe from Calgary.
”KLM678, contact Calgary Departure on 119.8.”
”200 AGL above Schiphol.”