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Top Route
Chicago
ORD / MDW
Denver
DEN

A popular domestic route connecting the Midwest to the Rocky Mountain region — in high demand year-round, particularly during ski season and summer.

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Route Details

Route TypeDomestic — Midwest to Mountain West
Typical Flight Duration~2 hours 30 minutes non-stop
Main CarriersUnited Airlines, American Airlines, Southwest, Frontier, Spirit
Busiest PeriodWinter ski season (December–March) and summer
Best Time to Book4–6 weeks in advance; ski season books out fast

About This Route

The Chicago–Denver corridor connects two of America's major metropolitan hubs. O'Hare (ORD) and Denver International (DEN) are both top-10 U.S. airports by passenger volume. The route attracts business travelers as well as leisure visitors headed to Colorado's skiing, hiking, and outdoor recreation.

With multiple carriers including United, American, Southwest, Frontier, and Spirit operating on this route, there is usually a strong selection of fares available at any given time. Our agents can find the best combination of price, schedule, and baggage policy for your trip.

Booking Tips for This Route

  • Denver International Airport (DEN) is a major United Airlines hub — good connection options for onward travel across the Mountain West.
  • Frontier Airlines is based in Denver and often offers the lowest base fares on this route.
  • Book early for ski season travel — December through February fares to Denver can be very expensive.
  • Morning departures from ORD tend to be more reliable — Chicago is prone to winter weather delays.
  • Denver sits at 5,280 feet — visitors from lower elevations may feel mild altitude effects for the first day or two.
  • Midweek travel on this route is significantly cheaper than weekend departures in winter.

Ready to Book Chicago to Denver?

Call now and our agents will compare all carriers for the best fare on your travel dates.

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