Walking can be a pleasant way to explore certain areas of Saint Charles, Missouri, particularly the historic downtown district, which features pedestrian-friendly streets and a charming atmosphere. The city has invested in trails and greenways, making some neighborhoods and recreational areas accessible on foot. However, the feasibility of walking as a primary mode of transportation may vary depending on the distance between destinations and the availability of sidewalks or pedestrian infrastructure in specific areas. Seasonal weather, including hot summers and cold winters, may also influence the comfort of walking for extended periods.

Biking is another practical way to get around Saint Charles, Missouri, thanks to its network of trails and bike-friendly routes. The Katy Trail, a well-known multi-use path, runs through the area and connects to various destinations, making it easier to navigate parts of the city and surrounding areas by bike. Some roads and sidewalks also accommodate cyclists, though distances between destinations may vary. Weather and topography should be considered, as hilly terrain or seasonal conditions could impact the ease of biking.

Public transit options are limited in Saint Charles, Missouri, with services like a trolley bus connecting key areas such as 2nd Street and other main points in the city. While these options can be helpful for short trips within the city, the limited routes and schedules may not cover all destinations or times of day. The infrastructure is more suited for localized travel rather than extensive commuting. Weather conditions and distances between stops could also impact the convenience of using public transit, making it less practical for some travelers.

Ferries are not a primary transportation option in Saint Charles, Missouri. While there is a ferry route connecting Saint Charles to Grafton, Illinois, this service is more suited for specific trips rather than daily commuting. The ferry accommodates vehicles, pedestrians, and bicycles, but the frequency of sailings and travel times can vary. Infrastructure and weather conditions may also impact ferry operations, making it less convenient for regular travel. For those looking to explore nearby areas or enjoy scenic river crossings, the ferry can be a pleasant option, but it is not a comprehensive solution for local transportation needs.