How often does the bus to Sabiha Gökçen Airport run in Istanbul, and how early should you arrive?
Based on 1 discussion with 5 participants · Last activity: 4 days ago
TL;DR
Bus 139 to Sabiha Gökçen technically runs every 2 hours, but it alternates with route 139A, so effective frequency is about once an hour. You're only allowed into the terminal 2 hours before departure, so for an 11:00 flight plan to arrive around 8:00.
What the community said
For a daytime flight (e.g. 11:00), leave extra time for travel and waiting — plan to be at the airport around 3 hours before departure, i.e. by 8:00.
1 day ago 11:00 flight → arrive by 8:00
Bus 139 alternates with the paired route 139A, so the official 2-hour interval effectively becomes about one bus per hour.
26 days ago Bus 139 / 139A — ~1 bus per hour
Having a pre-purchased bus/transfer ticket doesn't guarantee entry to the terminal building: you're only let in strictly 2 hours before departure, even with ticket in hand.
27 days ago Terminal entry — 2 hours before departure
According to the schedule, bus 139 is listed as running every 2 hours, more like an intercity route than city transit — this is confirmed in practice.
28 days ago Schedule: bus 139 — every 2 hours