Best way to travel between Istanbul, Turkey and Slovenia

A: Istanbul, Turkey

B: Slovenia

Travel Modes: Price; Distance; Duration; CO2

train: $131.0; 1784.99 km; 41h 6mins; 94.6 kgs

bus: $169.0; 1828.86 km; 30h 30mins; 54.87 kgs

drive: $300.0; 1536.08 km; 17h 15mins; 196.62 kgs

flight: $337.0; 1372.99 km; 7h 14mins; 148.28 kgs

Tranport	Distance	Time(hrs)	Cost(local)	Cost(usd)
Train	1784.99 km	41h 6mins	96 EUR	131.0
Bus	1828.86 km	30h 30mins	124 EUR	169.0
Drive	1536.08 km	17h 15mins	221 EUR	300.0
Flight	1372.99 km	7h 14mins	248 EUR	337.0

Take Bus from Istanbul to Sarajevo: Time: 27h 18mins Cost: 59 EUR; $ 72.0 - 88.0 USD CO2 Emission: 35.04 kgs
Take Train from Sarajevo to Zagreb Glavni Kolod.: Time: 9h 21mins Cost: 29 EUR; $ 36.0 - 44.0 USD CO2 Emission: 25.12 kgs
Take Train from Zagreb Glavni Kolod. to Ljubljana: Time: 2h 23mins Cost: 7 EUR; $ 9.0 - 11.0 USD CO2 Emission: 7.58 kgs

Source: Rome2rio

Mode of travel comparision chart

The best and cheapest way to get from Istanbul, Turkey and Slovenia is to travel by train, which will cost about 96 EUR or 117.90 USD.