Best way to travel between Sofia and Frankfurt

A: Sofia

B: Frankfurt

Travel Modes: Price; Distance; Duration; CO2

bus: $94.0; 2053.82 km; 33h 53mins; 61.61 kgs

train: $146.0; 1814.4 km; 18h 5mins; 96.16 kgs

flight: $224.0; 1487.85 km; 5h 7mins; 160.69 kgs

drive: $320.0; 1697.81 km; 18h 14mins; 217.32 kgs

Tranport	Distance	Time(hrs)	Cost(local)	Cost(usd)
Bus	2053.82 km	33h 53mins	69 EUR	94.0
Train	1814.4 km	18h 5mins	108 EUR	146.0
Flight	1487.85 km	5h 7mins	165 EUR	224.0
Drive	1697.81 km	18h 14mins	236 EUR	320.0

Take Bus from Sofia Central to Vidin: Time: 3h 49mins Cost: 8 EUR; $ 9.9 - 12.1 USD CO2 Emission: 7.88 kgs
Take Bus from Vidin to Negotin: Time: 1h 33mins Cost: 2 EUR; $ 2.7 - 3.3 USD CO2 Emission: 1.54 kgs
Take Bus from Negotin to Frankfurt: Time: 26h 28mins Cost: 59 EUR; $ 72.0 - 88.0 USD CO2 Emission: 52.22 kgs

Source: Rome2rio

Mode of travel comparision chart

The best and cheapest way to get from Sofia and Frankfurt is to travel by bus, which will cost about 69 EUR or 84.60 USD.