Book Your United Flight Book this flight
Get a United fare check: Chicago and Denver
The Chicago to Denver route at a glance
United runs a lot of flights between its Chicago and Denver hubs, so there's usually a time that suits you rather than just one or two options a day. It's about 890 miles, roughly two and a half hours in the air, and Denver is one hour behind Chicago. Denver's altitude and mountain weather can occasionally affect schedules in winter, so if you're connecting onward from there, it's worth leaving a little more time than you would at a sea-level airport.
Tips for this route
- Ski season and summer holidays fill flights to Denver. Book early if you’re heading to the mountains.
- Denver’s airport is a long way from downtown. A train runs between the airport and the city center, which helps if you’re not driving.
- Winter and spring storms can delay flights at both ends. Avoid the tightest connections.
How it works
- Call 1-800-369-5081 or send a fare-check request with your dates and number of travelers.
- We check United fares between Chicago and Denver.
- You review the options and confirm before anything is booked.
Questions about this route
Are you United Airlines?
No. TravelonAir is an independent travel agency and is not affiliated with United Airlines.
Does Denver's weather affect this route in winter?
It can, mainly for passengers connecting onward from Denver. The Chicago-Denver flight itself is usually reliable.
Is there a time difference between Chicago and Denver?
Yes. Denver is one hour behind Chicago.
Can you check both Chicago airports?
Yes. O’Hare is United’s hub, and we can also check Midway if that suits you.
Can you book the return flight too?
Yes. Tell us your dates for both directions, or ask for two one-way tickets. We’ll compare the options.