List of bus routes in Thessaloniki

This is a list of Thessaloniki Urban Transport Organization (OASTH) contracted bus routes in Thessaloniki, Greece.

Tickets
Pre-printed regular tickets may be purchased at OASTH ticket selling booths, at 1000 points of sale throughout the metropolitan area of Thessaloniki, or at ticket vending machines on-board buses. Special route tickets are only valid for the Cultural Route No 50 and AIRPORT - INTERCITY BUS TERMINAL routes No 01Χ and 01N and issued for one trip only. Tickets may be purchased from Cultural Route attendants onboard No 50 buses, or at OASTH kiosks and ticket vending machines on board the corresponding buses.

Historic classification
When the bus system of Thessaloniki was first established in 1957 all lines were numbered from the eastern to the western routes starting with 1. This applied to all routes from 1 to 29. However, after 1979 the rest of the lines were numbered based on the date of their creation.

Current classification
Nowadays, there is no official classification however unofficially the routes are classified as follows: trunk routes, urban routes (OASTH operated routes), metropolitan - regional routes (KTEL operated routes).

List of routes
All routes operate in both directions unless detailed. Operatings hours and frequencies are based on OASTH's summer everyday schedule. NOTE: the operating hours and frequencies may defer during the weekend. Average frequencies also differ based on the time of the day, see OASTH's official site or the referrences for the exact times.

Temporary express lines
In 2023, the Transport Authority of Thessaloniki started operating 4 special temporary express lines until the "Flyover" road of Thessaloniki was complete, presumably in 2028.