Best way to travel between Oslo, Norway and Cologne

A: Oslo, Norway

B: Cologne

Travel Modes: Price; Distance; Duration; CO2

bus: $71.4; 1406.12 km; 21h 27mins; 42.18 kgs

ferry: $100.74938999999999; 1246.45 km; 25h 51mins; 159.55 kgs

train: $115.5; 1614.93 km; 18h 10mins; 85.59 kgs

flight: $127.71; 1135.48 km; 5h 12mins; 122.63 kgs

drive: $235.2; 1478.22 km; 13h 57mins; 189.21 kgs

Tranport	Distance	Time(hrs)	Cost(local)	Cost(usd)
Bus	1406.12 km	21h 27mins	53 EUR	71.4
Ferry	1246.45 km	25h 51mins	74 EUR	100.74938999999999
Train	1614.93 km	18h 10mins	85 EUR	115.5
Flight	1135.48 km	5h 12mins	94 EUR	127.71
Drive	1478.22 km	13h 57mins	173 EUR	235.2

Take Bus from Oslo Bussterminal to Helsingborg Centralstation: Time: 6h 5mins Cost: 26 EUR; $ 31.5 - 38.5 USD CO2 Emission: 15.27 kgs
Take Bus from Helsingborg to Bremen central train station: Time: 9h 40mins Cost: 26 EUR; $ 31.5 - 38.5 USD CO2 Emission: 16.84 kgs
Take Train from Bremen Hbf to Köln Hbf: Time: 3h 42mins Cost: 63 EUR; $ 76.5 - 93.5 USD CO2 Emission: 17.79 kgs

Source: Rome2rio

Mode of travel comparision chart

The best and cheapest way to get from Oslo, Norway and Cologne is to travel by bus, which will cost about 52 EUR or 63.90 USD.