From Dumfries train to Glasgow Central then train to Paisley Gilmour Street. 1 h 59 min £24. From Dumfries, Academy Street (Catherine Street) bus to Buchanan Bus Station then bus to Glasgow Airport, Terminal Building (Glasgow Airport). 2 h 38 min £26. From Dumfries drive to Glasgow Airport (GLA). 1 h 31 min £16. From Dumfries towncar to Glasgow Airport. 1 h 31 min £215.