Colorado

By plane

All major airlines fly into Denver International Airport code: DEN as it is the major hub for the region, and in fact the ninth busiest airport in the world.

Here are some of the airports servicing Colorado:

CITY	IATA	ICAO	AIRPORT
Aspen	ASE	KASE	Aspen-Pitkin County Airport Sardy Field
Colorado Springs	COS	KCOS	City of Colorado Springs Municipal Airport
Cortez	CEZ	KCEZ	Cortez Municipal Airport
Denver	DEN	KDEN	Denver International Airport
Durango	DRO	KDRO	Durango-La Plata County Airport
Eagle	EGE	KEGE	Eagle County Regional Airport
Fort Collins / Loveland	FNL	KFNL	Fort Collins-Loveland Municipal Airport
Grand Junction	GJT	KGJT	Grand Junction Regional Airport Walker Field
Gunnison	GUC	KGUC	Gunnison-Crested Butte Regional Airport
Hayden	HDN	KHDN	Yampa Valley Airport Yampa Valley Regional
Montrose	MTJ	KMTJ	Montrose Regional Airport
Telluride	TEX	KTEX	Telluride Regional Airport

By train

Amtrak (http://www.amtrak.com) runs the California Zephyr (http://www.amtrak.com/ser...) from Emeryville to Chicago, stopping in Denver, Fort Morgan, Winter Park, Granby, Glenwood Springs, and Grand Junction.

Through the Eastern Plains, Amtrak runs the Southwest Chief (http://www.amtrak.com/ser...): from Chicago to Los Angeles, stopping in Lamar, La Junta, and Trinidad.

For more information, see Wikitravel's article Rail travel in the United States.