The average bus between St. Louis and Longmont takes 22h 21m and the fastest bus takes 19h 5m. There is at least one bus per day from St. Louis to Longmont. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run once daily between St. Louis and Longmont. The earliest departure is at 4:30 PM in the afternoon, and the last departure from St. Louis is at 11:45 PM which arrives into Longmont at 5:50 PM. All services require a transfer at Denver Union Station and take an average of 22h 21m. The schedules shown below are for the next available departures.
Arrives next day

22h 56m • 1 change
Arrives next day

18h 5m • 1 change
Arrives next day

22h 55m • 1 change
Arrives next day

18h 5m • 1 change
Want to know about travelling from St. Louis to Longmont? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from St. Louis to Longmont. However, there are services departing from St. Louis station and arriving at Longmont station via Denver Union Station station. The journey, including transfers, takes approximately 22h 21m.
St. Louis to Longmont bus services, operated by Greyhound USA, depart from St Louis Bus Station.
St. Louis to Longmont bus services, operated by Greyhound USA, arrive at Coffman St & 4th Ave station.
The distance between St. Louis and Longmont is 1,290.5 km. The road distance is 1,440 km.
You can take a bus from St Louis Bus Station to Coffman St & 4th Ave via Denver Union Station and Union Station Gate B16 in around 19h 10m.