we are 4 travallers arriving @ dortmund airport staying at the Mercure City Hotel Dortmund. Does anyone know the cost of a taxi from the airport to hotel? can this be pre-booked? If getting the shuttle bus to the city centre (railway station) this would be 20 euros for the 4 of us. Maybe a Taxi would be the same price. Or what is the distance from the airport to the hotel?