While Martinair only flies cargo to Seattle now, they used to fly scheduled summer charters. I believe these flights were routed AMS
. I've flown the SEA
segment a few times: in 1985 on a DC-10-30 (with Air Seychelles logos on it - VERY exotic for Seattle), in 1989 on a 747-200C (with a Qantas tail!), and in 1994 on a 767-300. The other airline logos were due to leasing the planes out during the off-season.
I believe Martinair stopped flying passengers to Seattle in the mid-1990s (perhaps when NWA started its SEA
service?). Since then, Martinair has moved its flights north to Vancouver, Calgary, and Edmonton, all with 767-300s.
Now Seattle, gets the 2 weekly cargo flights on an MD11F or CF per FlySwiss.