Possession of marijuana is now legal in Colorado but passengers caught carrying it in the airport are subject to arrest, jail time and fines up to 2 500 dollars.
Here are the rules for marijuana at the COS airport.
NOTICE: MARIJUANA IS PROHIBITED IN THIS FACILITY
It is unlawful to possess, consume, use, display, transfer, distribute, sell, transport, or grow (?) marijuana (including both recreational and medical) in or upon the passenger terminal facility, any overhang area to the passenger terminal facility, or the Air Operations Area (AOA) of the Colorado
Springs Municipal Airport. This includes all passenger carry-on and checked baggage. You must dispose of any and all marijuana before entering prohibited areas and/or checking baggage. Violators may be assessed a fine of not more than $2,500, imprisonment up to 189 days, probation, or a combination of fine, imprisonment, or probation, in addition to any other applicable penalties
under state or federal law.