Cheap Train tickets to Glasgow, US

What are the most popular routes to Glasgow?

Whitefish - GlasgowAverage price£87Average duration8h 18mDaily departures1
Wolf Point - GlasgowAverage price£20Average duration46mDaily departures1
Seattle - GlasgowAverage price£189Average duration21h 49mDaily departures2
Vancouver - GlasgowAverage price£183Average duration23h 35mDaily departures4
Everett - GlasgowAverage price£190Average duration20h 49mDaily departures2