Eagle County Regional (EGE) is the closest airport, ~40 minutes west; most travelers fly into Denver (DEN) and drive ~2 hours on I-70. Winter storms can close Vail Pass, so allow extra time.
EGE Eagle County Regional Airport — 40 min drive
DEN Denver International Airport — 120 min drive
ASE Aspen/Pitkin County Airport — 140 min drive
HDN Yampa Valley Regional (Steamboat/Hayden) — 150 min drive
GJT Grand Junction Regional Airport — 150 min drive