Go Around Map: a free map of flights, day by day
Pick an airport and a day to see every route flying from or to it on a map, with the flights and their times, and which routes only operate on other days of the week. Use it to see where you can fly and to plan a trip around the days flights actually run. Free, with no sign-in.
All routes lead somewhere.
Eventually.
Pick an airport on the map, or search for one, and choose a day to see where you can fly.