checking if there are numbers in the string

[Sp00f]

flyTo = input("Where would you like to fly? ")
if flyTo == flyTo.isdigit():
    print("You accidentally added a number")
elif flyTo == flyTo.isalpha():
       print("Okay, we are going to {} ".format(flyTo))
else:
    print("??")

k don't laugh

no matter what is entered,
it says: "??"

I want it to check if there are numbers.. and if so, to say "you accidentally added a number"
how would i proceed with allowing letters, not numbers?

thanks