From Oban train to Glasgow, Cathedral Street (Queen St Station) then line 500 bus to Glasgow Airport, Terminal Building (Glasgow Airport). 3 h 23 min £32. From Oban, Station Road (Bus Stance 3) bus to Buchanan Bus Station then bus to Glasgow Airport, Terminal Building (Glasgow Airport). 3 h 29 min £24. From Oban drive to Glasgow Airport (GLA). 1 h 49 min £17.
ScotRail operates a train from Oban to Glasgow Airport (GLA) once daily. Tickets cost $29 - $45 and the journey takes 2 h 59 min. First also services this route every 5 minutes. Alternatively, Scottish Citylink operates a bus from Oban to Glasgow Airport (GLA) 4 times a day. Tickets cost $22 - $30 and the journey takes 3 h. 2 other operators also service this route.