$140 Cheap United flights Raleigh (RDU) to Colorado Springs (COS)

Landing cheap one-way United Airlines flights from RDU to COS from $140 on Expedia is a breeze — just filter by “Price (lowest to highest).” Or check out our affordable return fares from $279 for your next adventure.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

January is one of the least expensive months to fly to Colorado Springs with United Airlines. You could also find excellent prices on return and one-way tickets in February.

Look for cheap United Airlines flights from Raleigh - Durham Intl. Airport (RDU) to Colorado Springs Airport (COS) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the best day to book a domestic flight is generally Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

Fill in your dates, hit search and check “Nonstop” on Expedia to browse any direct flights from RDU to COS with United Airlines or another carrier.

To find the earliest departures from RDU to COS with United Airlines, sort your results by “Morning” and “Early Morning.” Choosing an early flight usually means you’ll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Colorado Springs Airport (COS) is the primary Colorado Springs gateway for United Airlines flights from Raleigh - Durham Intl. Airport (RDU).

Journey from RDU to COS with United Airlines and enjoy a range of perks starting with a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you can also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to modify or cancel your flight, although additional fees may apply if you made your booking over 24 hours ago. Prefer to keep your options open? Use our “No cancel fee” and “Changes included” filters to find flights that won’t penalize you if you have to revise your plans. To update your itinerary, head to “Trips,” select your flight and click on “Manage Booking” for more details.