Best way to travel between Istanbul, Turkey and Tehran

A: Istanbul, Turkey

B: Tehran

Travel Modes: Price; Distance; Duration; CO2

bus: $64.0; 2779.92 km; 46h 13mins; 83.4 kgs

train: $82.0; 2741.86 km; 67h 16mins; 145.32 kgs

drive: $500.0; 2510.11 km; 31h 33mins; 321.29 kgs

flight: $1208.0; 2091.71 km; 9h 48mins; 225.9 kgs

Tranport	Distance	Time(hrs)	Cost(local)	Cost(usd)
Bus	2779.92 km	46h 13mins	1,587,411 IRR	64.0
Train	2741.86 km	67h 16mins	2,033,871 IRR	82.0
Drive	2510.11 km	31h 33mins	12,401,650 IRR	500.0
Flight	2091.71 km	9h 48mins	29,962,386 IRR	1208.0

Take Train from Aksaray to Otogar: Time: 14mins Cost: 49,607 IRR; $ 1.8 - 2.2 USD CO2 Emission: 0.38 kgs
Take Bus from Istanbul Otogari to Tehran: Time: 44h 43mins Cost: 1,364,182 IRR; $ 49.5 - 60.5 USD CO2 Emission: 82.84 kgs
Take Car from Tehran to Tehran: Time: 14mins Cost: 173,623 IRR; $ 6.3 - 7.7 USD CO2 Emission: 1.5 kgs

Source: Rome2rio

Mode of travel comparision chart

The best and cheapest way to get from Istanbul, Turkey and Tehran is to travel by bus, which will cost about 1,587,411 IRR or 57.60 USD.