Scoping out the transportation options in St. Charles Historic District is a smart way to keep your trip affordable. The nearest airport is 7.1 mi (11.5 km) from the centre in Lambert-St. Louis International Airport (STL). However, if that doesn't suit your budget, you can look into flights to St. Louis, MO (SUS-Spirit of St. Louis), which is 11.8 mi (19 km) away. St. Charles Historic District might not have very many public transport choices so a car rental could be a reasonable alternative to explore the area.