$80 Find Cheap Flights from Raleigh to Boulder

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Raleigh to Boulder departing on 6/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$153
Typical prices: $481-$276
Frontier
Tue 6/2Wed 6/3
RDU - DEN • 2 stops
Cheapest non-stop
$156
Typical prices: $481-$235
Frontier
Wed 5/27Sat 5/30
RDU - DEN • Non-stop
Arrival airport
You can't fly directly to Boulder. It is served by Denver (DEN), located 33.4 miles from Boulder.
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Flight Deals
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Flight Deals

Cheap Flights from Raleigh to Boulder (RDU-DEN)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Raleigh to Boulder that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Raleigh to Boulder

Tue, Jun 2 - Wed, Jun 3
Frontier Logo
12:54 pm - 11:44 pm
RDU
-
DEN
12h 50m
2 stops
Frontier Logo
6:03 am - 11:31 am
DEN
-
RDU
3h 28mnonstop
$153Frontier
Sat, Jun 6 - Sat, Jun 13
Frontier Logo
12:26 pm - 2:32 pm
RDU
-
DEN
4h 06mnonstop
Frontier Logo
6:00 am - 2:33 pm
DEN
-
RDU
6h 33m
1 stop
$154Frontier
Wed, May 27 - Sat, May 30
Frontier Logo
12:26 pm - 2:32 pm
RDU
-
DEN
4h 06mnonstop
Frontier Logo
6:03 am - 11:31 am
DEN
-
RDU
3h 28mnonstop
$156Frontier
Wed, May 20 - Wed, May 27
Frontier Logo
1:23 pm - 3:28 pm
RDU
-
DEN
4h 05mnonstop
Frontier Logo
6:03 am - 11:31 am
DEN
-
RDU
3h 28mnonstop
$157Frontier
Tue, Aug 18 - Sun, Aug 23
Frontier Logo
12:26 pm - 2:29 pm
RDU
-
DEN
4h 03mnonstop
Frontier Logo
11:42 pm - 8:03 am
DEN
-
RDU
6h 21m
1 stop
$158Frontier
Thu, May 28 - Tue, Jun 2
Frontier Logo
12:26 pm - 2:32 pm
RDU
-
DEN
4h 06mnonstop
Frontier Logo
6:03 am - 11:31 am
DEN
-
RDU
3h 28mnonstop
$159Frontier
Tue, Jun 2 - Sat, Jun 6
Frontier Logo
12:26 pm - 2:32 pm
RDU
-
DEN
4h 06mnonstop
Frontier Logo
9:52 am - 10:46 pm
DEN
-
RDU
10h 54m
1 stop
$160Frontier
Tue, May 26 - Mon, Jun 1
Frontier Logo
3:07 pm - 11:04 pm
RDU
-
DEN
9h 57m
1 stop
Frontier Logo
6:03 am - 11:31 am
DEN
-
RDU
3h 28mnonstop
$161Frontier
Wed, May 27 - Sat, May 30
Frontier Logo
10:16 am - 7:29 pm
RDU
-
DEN
11h 13m
1 stop
Frontier Logo
6:03 am - 11:31 am
DEN
-
RDU
3h 28mnonstop
$162Frontier
Sat, Jul 18 - Tue, Jul 21
Frontier Logo
1:36 pm - 8:32 pm
RDU
-
DEN
8h 56m
1 stop
Frontier Logo
6:03 am - 11:31 am
DEN
-
RDU
3h 28mnonstop
$163Frontier
Useful Info

Good to know

Low seasonNovember
Cheapest flight$80
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Raleigh to Denver

When to book flights from Raleigh to Boulder

Are your dates flexible? Find out the best times to travel from Raleigh to Boulder based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

FAQs for booking flights from Raleigh to Boulder

  • Which airports will I be using when flying from Raleigh to Boulder?

    When flying out of Raleigh you’ll be using Raleigh-Durham. Boulder does not have its own airport so you’ll be flying into nearby Denver Intl airport, which is 33.4 mi away.

  • How long does a flight from Raleigh to Boulder take?

    Direct flights cover the 1,432 miles separating Raleigh and Boulder in about 3h 35m.

  • How many flights are there between Raleigh and Boulder?

    8 direct flights run between Raleigh and Boulder on a daily basis. On average, there are about 57 departures each week.

  • What’s the cheapest day of the week to fly between Raleigh and Boulder?

    Consider leaving on a Thursday and avoid Sundays if you are looking for the best rates. For your return to Raleigh, you’ll find the best rates on Wednesdays and the most expensive ones on Sundays.

  • How does KAYAK find such low prices on flights from Raleigh to Boulder?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Raleigh to Boulder.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Raleigh to Boulder?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boulder from Raleigh is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Raleigh to Boulder?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Boulder with an airline and back to Raleigh with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Raleigh to Boulder?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boulder from Raleigh up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • Which airlines provide the cheapest flights from Raleigh to Boulder?

    In the last 72 hours, the cheapest one-way ticket between Raleigh and Boulder found on KAYAK was with Frontier for $57. Frontier offered a round-trip connection from $98 and Delta from $128.

Top tips for finding cheap flights from Raleigh to Boulder

  • There is no airport in Boulder. Instead, you’ll be flying into Denver Airport when flying between Raleigh and Boulder.
  • The cheapest flight from Raleigh to Boulder was found 59 days before departure, on average.
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly is January.

Reviews of the top 5 airlines serving Raleigh to Boulder

 
Need help choosing which airline to fly with from Raleigh to Boulder? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4304 reviews
7.0Food
7.5Entertainment
8.0Comfort
8.6Crew
8.1Boarding
Airline reviews

I'm glad it wasn't only 75% full because I could get a good seat

8.0 ExcellentBobby, May 2026
BNA - GSP
Read more Southwest reviews

I'm glad it wasn't only 75% full because I could get a good seat

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Seats were very comfortable. They tilted back. Drinks and snacks were free and served 3 times. Attendants were awesome.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

The agent at check in and at the gate were less than thrilled to be at work. I'm not a fan of Kayak's placement on the plane. I got put in the middle seat and none of my preferences were used.

In ATL they have two sets of departure screens. Follow what is on your airline's departure board - the ATL Airport Authority departure board had completely incorrect details about the gate assignment for my flight, which would have made me miss boarding.

Flight was delayed it was hot while sitting on the plane, one engine was working on the plane until they had to do some jimmy rigging down the runway in order for the other engine to charge up. It was ridiculous

The flight was very good and the staff was very friendly and helpful!

The only thing I would say is we tried to get on a standby earlier flight, but with our fair we couldn’t. That seems senseless to leave with open seats..

Very easy to use and convenient, you can perform any action within the same portal

In a world of delays, Delta was on time both ways! Boarding was fast and efficient. Staff was friendly. AND wifi worked.

It was good overall except from Omaha to Denver when flight a was a repeatedly delayed apparently due to some issue at Denver. Communications could have been handled better. I had to board then deboard with luggage and board again

I didn’t have a seat assignment and my seat was very dirty on the flight from Frankfurt to Budapest.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

The entertainment options on the seat back video boards were nice.

The boarding process was straightforward. One pertinent observation regarding all boarding procedures is that if an individual requires assistance or possesses a special status and is part of preboarding, it is advisable to limit the number of passengers who can preboard with them, rather than the entire, sometimes large, companion groups. The seats are uncomfortable, and the entertainment options are significantly inferior compared to other airlines. During the snack service, I requested an additional bag of snacks, but my request was denied. Initially, the flight attendant agreed to my request.becoming a strange accurate moment. The flight duration was four hours.

I had a cancelled flight because of technical issues going to my destination, and a delayed flight coming home. All told it wasn’t a total bust.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

Had to wait for a gate for a long time, then waited on the run way for a long time before leaving. The actual flights part was good.

Airlines should be prohibited from using the seats they get away with.

Everything was delayed and the staff sent me to the wrong gate, causing me to miss one of my flights. I arrived at my destination 6 hours later than I was supposed to.

Got home at 3am after deboarding the plane. No compensation offered by American

The "on the ground" A/C was not working. It was so hot while waiting to get in the air, a passenger from the rear of the plan declared "I just can't!" and waited in the gangway until time to close the doors. It was miserable. But the crew were champs and had an amazing attitude. I know they were as miserable as we were but didn't let that affect their performance.

When I booked my flight a month ago - I selected a seat. That seat was NOT the one I ended up with when I checked into my flight the day before. This is the second time this has occurred. So, I checked my next flight on Wednesday and Thursday and no seat was assigned. Poor, very poor customer service.

Cleared standby and gave up my seat. Terrible policy and boarding experience

Message about flight cancelation was received late due to being in the air. No explanation, just canceled and booked on morning flight. We had to stay in the airport overnight because there was no transportation offered to get to the hotel that AA had available. Actual inflight was fine.

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

Ceiling fell down and had to have maintenance come and duct tape it up. No WiFi on the flight.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

It was an early flight and most people napped/slept and the crew let us which was nice.

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

I knew going into this that Frontier, being a low cost carrier, would be pretty bare bones and charge for most extras but this was made up for by the fact that the airplane was a reasonably new Airbus, every employee was great and best of all, Everett Washington is an amazing airport - thanks Frontier for flying there!!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

The experience was good. No frills but I got there safe and sound and on time.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

Everything you need to know for your flight from Raleigh to Boulder

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