Start with the 05:00 İDO ferry from Istanbul to Bursa, about 2h 15m. Transfer in Bursa, then take the 09:15 FlixBus bus on to Gebze (50 min). Transfer in Gebze, then take the 11:15 FlixBus bus on to Bayrampaşa (1h 45m). Transfer in Bayrampaşa, then take the 13:30 FlixBus bus on to Sofia (8h 30m). Transfer in Sofia, then take the 07:00 (+1d) FlixBus bus on to Athens (12h 21m). You arrive in Athens around 19:21 (+1d). In total it's roughly EUR 159 over 38h 21m, 4 transfers.
İDO
FlixBusOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
FlixBusOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
FlixBusOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
FlixBusOpens Omio — enter your date to compare trains and buses for this route; the price is finalised at checkout.
Ground-only route to Athens by ferry + bus. Ferry (İDO, 2h 15min) + Bus (FlixBus, 50min) via Bursa + Bus (FlixBus, 1h 45min) via Gebze + Bus (FlixBus, 8h 30min) via İstanbul Esenler + Bus (FlixBus, 12h 21min) via Sofia.