The cheapest way in. Nothing listed is quicker.
S19 or RE6 to Köln Hauptbahnhof
S19RE6 · DB Regio NRW (S19) and National Express (RE6), RheinlandtarifPickup, hours & luggage
Boards at. Flughafen Köln/Bonn station, under the terminals — the S19 from platforms 1 and 2, the RE6 from platform 3; lifts and escalators come up inside the terminal
EUR 4.00 an adult, EUR 1.80 a child aged 6 to 14, EUR 9.60 for a 24hTicket, EUR 19.20 for the 24hTicket 5 Personen (up to five people, 24 hours, on every bus, tram, S-Bahn and regional train in the city) — cheaper than five singles at EUR 20.00. The EUR 2.90 Kurzstrecke is not sold for S-Bahn or regional trains. The KölnCard covers the same area for EUR 9.00 (one person) or EUR 19.00 (five), sold at the same machines.
Luggage. Commuter trains with racks and standing room; full at rush hour.