There are
1,046 mi
from Gaithersburg, MD to Lenexa, KS
That's the driving distance. It would take 19 hours 58 mins to go from Gaithersburg, Maryland to Lenexa, Kansas.
The flight distance (direct flight from Gaithersburg, MD to Lenexa, KS) is 939.38 mi.
1,046 mi = 1,682.69 kms