I guess I'm an average cyclist. I ride my bike if walking takes too long. There's a subway 1.4 km from my house. Google maps says 4 min but I'm not sure. It's all flat. About how long would it take?
Assuming your terrain is relatively flat:
Average cyclists will be 10-15 km/h, so that's 8.5 and 6 minutes.
I've walked past a grannie cyclist while out exercising my dog, so she would be doing under 6 km/h and at that speed would take 21 minutes to get to the station.
A fast road bike does 40 km/h and the pros can do 50-55 km/h sustained, so that's 2.1 minutes and 1.5 minutes respectively.
The world land speed record on a bike is well above 130 km/h and at that speed you'd be at the station in ~38 seconds.
The formula is
( Distance in km ) / ( Speed im km/h ) * 60
returning a time in minutes. This assumes no stopping for lights or traffic or crossing.