Route guide · 1,433 miles
Cheap Flights from Raleigh-durham to Denver
RDU → DEN · Nonstop 3h 25m · Live round-trip fares
Flying from Raleigh-durham to Denver doesn't have to drain your wallet. This 1,433-mile hop takes about 3h 25m nonstop, and fares swing a lot depending on the week you pick. Travelers who book roughly 3–6 weeks out usually come out ahead — set a free alert and let the deals come to you.
Live fares for RDU → DEN are updating. Use the search below for real-time prices.
Search live pricesCheapest recent fare
See live fares
Updated daily
Flight time
3h 25m
Nonstop, typical
Distance
1,433 mi
RDU → DEN
Book ahead
3–6 weeks
Best window, typically
Nonstop airlines
1
Southwest Airlines
Nonstop flights from Raleigh-durham to Denver
Want to skip the layover? Nonstops from Raleigh-durham to Denver are flown by Southwest Airlines, getting you there in about 3h 25m. For the lowest fares, book around 3–6 weeks before departure — last-minute nonstops on this route rarely come cheap.
Booking insights: Raleigh-durham → Denver
- Distance: 1,433 miles · nonstop flight time: 3h 25m.
- Rule of thumb for this route: the sweet spot is usually 3–6 weeks before departure.
- Tuesday and Wednesday departures usually undercut Friday and Sunday fares on routes like this one.
- Set a free Airfare Deal alert instead of checking daily — the best fares can sell out in hours.
Free fare alerts
Watch Raleigh-durham (RDU) → Denver (DEN)
We check this route's fares daily. The moment the price drops, we'll email you — free, unsubscribe anytime.
Talk to a real person
Get Raleigh-durham → Denver flights confirmed by phone
Fares move fast. Call us and we'll confirm the latest price for your dates — or drop your number and we'll call you back. Free, no payment taken on the call.
Request a callback
Flying from Raleigh-durham to Denver: what you need to know
The flight
Raleigh-durham to Denver is a proper cross-country leg — 1,433 miles and around 3h 25m in the air nonstop. Download entertainment before you board, bring a full water bottle, and think about the time change: even a two-hour shift can leave you groggy if you land late and start early.
Airlines on this route
Southwest Airlines flies this route nonstop. That matters more than it sounds: the cheapest fare on one carrier is rarely the same product as the cheapest on another. Checked-bag fees, free seat selection and change rules all differ, so compare the full trip cost before you pick a winner. See our airline guides for exactly what each carrier charges — then send an enquiry and we'll confirm the all-in price for your dates.
Leaving from Raleigh-durham (RDU)
Plan to be at the airport two hours before a domestic departure — ninety minutes can work at smaller airports outside peak times, but security lines are the one variable you can't control. If you're checking a bag, add time rather than cutting it close. Our Raleigh-durham airport guide covers terminals, parking and ground transport so you can plan the trip to the airport, not just the flight.
Arriving in Denver (DEN)
Before you land, know how you're getting from the airport to where you're staying — it's the part of the trip people forget to plan. The Denver airport guide lays out your ground options, from transit and shuttles to rideshares and rental cars. Flying back the other way? Check Denver to Raleigh-durham fares — prices on the return direction often move on a different rhythm.
When to book
For a trip of 1,433 miles, booking 3–6 weeks ahead typically lands you in the sweet spot. Leave it to the final two weeks and prices usually climb as the cheapest seats sell out. If your dates are flexible, midweek departures are where the lower fares hide on most domestic routes.
Good to know before you go
- Download the airline's app before you fly; gate changes and delays show up there first.
- Nonstop time on this route is about 3h 25m — a one-stop itinerary needs to be a lot cheaper to be worth the extra hours.
- Tuesday and Wednesday departures are typically the cheapest days on domestic routes.
- Screenshot your fare before you enquire — prices move, and a saved fare helps our team match or beat it.
- Flexible dates? Search a few days either side — one day can change the fare a lot.
Raleigh-durham to Denver flight FAQs
How long is the flight from RDU to DEN?
Nonstop flights from Raleigh-durham to Denver take about 3h 25m and cover roughly 1,433 miles. One-stop itineraries add 2–4 hours depending on the layover city.
Are there nonstop flights from Raleigh-durham to Denver?
Yes — look for Southwest Airlines on this route. Nonstop seats are usually priced best 3–6 weeks before departure.
What is the cheapest month to fly from Raleigh-durham to Denver?
There's no single magic month, but prices on this route generally soften in the shoulder season, when demand dips after the holidays and again in early fall. A free fare alert is the easiest way to catch those windows.
How much are last minute flights from RDU to DEN?
Walking up to this route at the last minute is the expensive way to do it — prices inside 7 days of departure climb fast. The 3–6 weeks booking window is where the value sits.
What is a good round-trip deal from Raleigh-durham to Denver?
A good deal is anything at or below the recent fares shown above. Set a free Airfare Deal alert and we'll ping you the moment fares drop.
Which airlines fly from Raleigh-durham to Denver?
The main carriers on this route are Southwest Airlines. Comparing all of them on the live search below usually surfaces the lowest fare for your dates.
How early should I get to Raleigh-durham airport for this flight?
Plan on two hours before departure for a domestic flight — ninety minutes can work at smaller airports outside peak times. If you're checking a bag, earlier is better; the bag-drop line, not the flight, is what runs late.
Do the cheapest fares on this route include a checked bag?
Usually not. Basic economy fares on most airlines include a carry-on but charge extra for checked bags, and seat selection can cost more too. Add up the real total before comparing — a slightly higher regular fare sometimes works out cheaper. Our team confirms the full breakdown with you before you pay.
More cheap flights from Raleigh-durham
How Airfare Deal works — Airfare Deal is a free fare-search and enquiry service. We take no payment online; send an enquiry and our travel team confirms your fare before you pay anything.