Denver to Raleigh-Durham Flights: What to Know Before You Book

A nonstop flight from Denver to Raleigh-Durham takes about three and a half hours. Denver International Airport (DEN) is Denver's only major commercial airport. United Airlines, Southwest Airlines, and Frontier Airlines operate nonstop flights on the route. Flight rates on this route vary by season and how far in advance you book. It's always a good idea to compare airlines and check total costs, including bags, before you book.

Denver to Raleigh-Durham Flight Details

The Denver to Raleigh-Durham flight route connects the tech corridor of Colorado with Research Triangle Park. There are multiple flights operating daily, with connecting and nonstop service. The table below highlights key details of the DEN to RDU flight route.

Fares are sourced from CheapFlightFares’ internal fare database.

How Much Does A Flight From Denver to Raleigh-Durham Cost?

Flight fares from Denver to Raleigh-Durham remain relatively high, but they fluctuate depending on when you book and which month you fly. When we searched for RDU flights for November four weeks before departure, the fares were around $109. This data comes from CheapFlightFares. Airfares fluctuate throughout the year with consumer demand and holiday schedules.

Low season in Raleigh-Durham is usually the winter months, from January to February. Cold weather and lower post-holiday demand make it a cheap time to book Denver to Raleigh-Durham flights. The one-way fares usually start around $131. However, expect the one-way holiday fares around Christmas and New Year to be around $260 as demand increases.

The next recommended window is spring, from March to May, and the autumn months of September to November. These seasons see relatively less demand because they fall between the high-demand peak seasons and the low/off-peak seasons. Fares during these times can be around $131 to $288 one way.

Summer months are the peak travel period in Raleigh-Durham. Family vacations, school summer holidays, and strong consumer demand for getaways drive fares up. Flights from June to August start at $292 one way, making them the most expensive.

How Long Is the Flight from Denver to Raleigh-Durham?

The average nonstop flight time from Denver International Airport to Raleigh-Durham International Airport (RDU) is around three hours 30 minutes. A connecting itinerary between these destinations, on the other hand, can take five to seven hours or more, depending on the number of layovers and their duration.

There is a two-hour time difference, as Denver is in the Mountain Time Zone, and Raleigh is in the Eastern Time Zone. Raleigh is two hours ahead of Denver. For example, if your flight takes off from Denver at 8:00 a.m., it’s already 10:00 a.m. in Raleigh (Eastern Time). Add the 3.5-hour flight, and you land at 1:30 p.m. in Eastern Time. On the clock, it may look like the trip lasted 5.5 hours, but you were only in the air for 3.5 hours.

Which airlines fly from Denver to Raleigh-Durham?

Three major US airlines fly nonstop from Denver to Raleigh-Durham. With 28 weekly nonstop flights, the daily frequency is about four. Airlines such as American and Delta add to the daily frequency by offering connecting flights.

United Airlines

United operates around 10 weekly nonstop flights between DEN and RDU. The airline offers morning, afternoon, and evening flights, giving travelers the option to fly at any time of day. The airline’s standard fares include a personal item, but basic economy tickets may not allow a carry-on bag, so check the fare rules before booking. United credit cardholders may be entitled to perks like a free checked bag, so check your card benefits before booking.

Southwest Airlines

Southwest flies about 13 nonstop flights per week between Denver and Raleigh-Durham. Denver is one of its major operating bases, so the airline has a large presence at DEN. Southwest’s nonstop flights are also among the quickest on the route, at roughly three hours and five minutes from Denver.

Frontier Airlines

Frontier is a low-cost carrier that operates about five weekly flights from Denver to Raleigh-Durham. The airline’s base fares on this route can be the cheapest, which makes it popular with budget travelers. However, carry-on bags, checked bags, and seat selection cost extra. Therefore, add these costs before deciding whether it is truly the lowest fare. Frontier doesn’t fly this route every day. Check the schedule before booking.

Denver Airport for Raleigh-Durham Flights

Denver International (DEN) is the main airport on the Denver-to-Raleigh-Durham route. It is about 25 miles northeast of downtown Denver, and the drive or train ride generally takes 35 to 45 minutes. The airport has one main building, the Jeppesen Terminal, where travelers check in and go through security. It also has three concourses (A, B, and C) which are connected by an underground train. Each airline flying this route nonstop has its own concourse. United, which operates a major hub in Denver, is based in Concourse B. Southwest, which uses Denver as one of its main operating bases, operates mainly out of Concourse C, and Frontier, which is headquartered in Denver, has a large presence in Concourse A. Travelers must check their boarding pass for their gate and concourse, and allow extra time to get through security and reach their gate. Arriving at least two to three hours before takeoff is advised to avoid any last-minute hassles.

Frequently Asked Questions

Is there a nonstop flight from Denver to Raleigh-Durham (RDU)?

Yes. United, Southwest, and Frontier have offered nonstop service from Denver to RDU.

How long is the flight from Denver to Raleigh-Durham?

A nonstop flight from Denver to Raleigh-Durham takes around three and a half hours. Connecting flights, on the other hand, can take anywhere between five and seven hours or more.

Are there alternate airports in Denver?

No. Denver International (DEN) is the only major commercial airport serving the Denver area.

What is the cheapest time to fly from Denver to Raleigh-Durham?

January and February, outside holiday weeks, are the low season and therefore the cheapest time to fly from Denver to Raleigh-Durham.

How much does a Christmas flight from Denver to Raleigh-Durham cost?

Fares around Christmas and New Year’s can cost you around $359 one way, which is well above the yearly average.