The cheapest way to the airport. Nothing listed is quicker.
Bus F to the Hauptbahnhof
F · IVB (Innsbrucker Verkehrsbetriebe)Pickup, hours & luggage
Boards at. Innsbruck Hauptbahnhof, stop G, towards Flughafen
EUR 3.30 for the Innsbruck single, one ride with changes. Buy it at the machine at the airport or in the apps; nothing is sold on board. Up to four children under six ride free with an adult.
Luggage. No luggage rule or rack is stated; it is an ordinary city bus.
Hours. Every 15 minutes on weekdays by day, every 20 on Saturdays, every 30 on Sundays and every evening. The first, at 04:32, runs every day.