$130 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 9/4. 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
$211
Typical prices: $197-$399
Frontier
Sat 9/19Thu 9/24
RDU - DEN • 1 stop
Cheapest non-stop
$215
Typical prices: $197-$413
Frontier
Tue 9/22Wed 9/30
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

Sat, Sep 19 - Thu, Sep 24
Frontier Logo
4:20 pm - 10:33 pm
RDU
-
DEN
8h 13m
1 stop
Frontier Logo
6:30 am - 11:53 am
DEN
-
RDU
3h 23mnonstop
$211Frontier
Tue, Sep 22 - Wed, Sep 30
Frontier Logo
12:48 pm - 2:52 pm
RDU
-
DEN
4h 04mnonstop
Frontier Logo
6:30 am - 11:53 am
DEN
-
RDU
3h 23mnonstop
$215Frontier
Tue, Sep 22 - Wed, Sep 30
Frontier Logo
12:48 pm - 2:52 pm
RDU
-
DEN
4h 04mnonstop
Frontier Logo
6:30 am - 11:53 am
DEN
-
RDU
3h 23mnonstop
$216Frontier
Tue, Sep 22 - Sat, Sep 26
Frontier Logo
6:35 am - 2:00 pm
RDU
-
DEN
9h 25m
1 stop
Frontier Logo
6:30 am - 3:07 pm
DEN
-
RDU
6h 37m
1 stop
$218Frontier
Sun, Sep 20 - Sat, Oct 3
Frontier Logo
12:48 pm - 2:52 pm
RDU
-
DEN
4h 04mnonstop
Frontier Logo
6:30 am - 11:53 am
DEN
-
RDU
3h 23mnonstop
$220Frontier
Tue, Sep 22 - Thu, Sep 24
Frontier Logo
12:48 pm - 2:52 pm
RDU
-
DEN
4h 04mnonstop
Frontier Logo
6:30 am - 11:53 am
DEN
-
RDU
3h 23mnonstop
$222Frontier
Sat, Sep 19 - Thu, Sep 24
Frontier Logo
12:48 pm - 2:52 pm
RDU
-
DEN
4h 04mnonstop
Frontier Logo
6:30 am - 11:53 am
DEN
-
RDU
3h 23mnonstop
$224Frontier
Sat, Jul 25 - Sat, Aug 1
Frontier Logo
6:15 am - 10:28 pm
RDU
-
DEN
18h 13m
1 stop
Frontier Logo
11:59 pm - 8:11 am
DEN
-
RDU
6h 12m
1 stop
$226Frontier
Tue, Sep 29 - Thu, Oct 1
Frontier Logo
12:48 pm - 2:52 pm
RDU
-
DEN
4h 04mnonstop
Frontier Logo
6:25 am - 12:17 am
DEN
-
RDU
15h 52m
2 stops
$227Frontier
Tue, Sep 29 - Thu, Oct 1
Frontier Logo
12:48 pm - 2:52 pm
RDU
-
DEN
4h 04mnonstop
Frontier Logo
6:30 am - 12:17 am
DEN
-
RDU
15h 47m
1 stop
$230Frontier
Useful Info

Good to know

Low seasonNovember
Cheapest flight$130
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly with an average 11% increase in price.
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?

    6 direct flights run between Raleigh and Boulder on a daily basis. On average, there are about 43 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 Mondays 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 5 days, the cheapest one-way ticket between Raleigh and Boulder found on KAYAK was with Frontier for $58. Frontier offered a round-trip connection from $98 and JetBlue from $157.

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 51 days before departure, on average.
  • Book at least 1 week 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.
7.9
SouthwestOverall score based on 4245 reviews
8.6Crew
8.0Comfort
7.0Food
7.5Entertainment
8.1Boarding
Airline reviews

Crew was rude, flight was late, wifi didn't work, no food, basically nothing about this flight was good.

2.0 MediocreIrene, Jun 2026
CMH - DEN
Read more Southwest reviews

Crew was rude, flight was late, wifi didn't work, no food, basically nothing about this flight was good.

Flight was constantly delayed with significant changes in time, it was supposed to get to Colorado Springs at 8:30 PM but it got there after midnight.

Airline is not very senior friendly. Flights are late, forcing us to run to the connecting flight. Food is awful. Wish they would go back to pretzels and peanuts. During flight, pressurization isn’t quite right and all of our ears get plugged. Everything is nickel and dime, charging for boarding, seat selection and legroom. While a screen at the desk in the gate area says check your roll on bag now for free due to space limitation, the employee at the desk will not check the bag without a $100 fee. Insane.

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

I appreciate the staff who allowed me to board though I arrived a little late! Regarding the assigned seating, I had booked my flight before this change and wasn't aware of the change at the time, and so I didn't select a seat at booking as I didn't realize it was relevant. Better communication about the change would have been helpful for preparing.

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

It was cancelled at the last minute. Left us scrambling. Totally unacceptable

Seats are tight. You pay extra to get to board early so you can sit with your companion. If not, you possibly will end up sitting in a middle seat if you are boarding group C.

Lost cabin pressure and had go back to the originating airport. We were left sitting on the plane for more than 30 minutes with no directions from Southwest on what was going on, other than the app telling us there would be a flight at 12:30 AM. I finally got off and went directly to a SW desk and rebooked for the next day. I understand that malfunctions happen, but SW was totally unprepared to manage the situation and did not serve the passengers. To make matters worse, they took one hour to find my checked bag.

Appreciate that when flight was delayed, our next connection waited for us.

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Two delays on two separate planes with parts they could not easily find and replace.

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.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Flight was 3 hours late so only had an OK experience

I had a wonderful experience flying with delta. The gentleman taking care of us on our flight was so nice, accommodating, and attentive. He always was smiling and giving pins to the kids which made me smile. The flight was quick too and without turbulence. Thank you for the great flying experience.

Horrible. This was not first class. This was a connecting flight whi h was late. My original flight never came. I hated the fact that delta gave me a connecting flight from New York to Orlando Florida. No meals and the television screens were not working. There wasn't even any power to charge your phones. This is NOT FIRST CLASS DELTA!!! Do better next time!

Flight was late. Club was full. Experience is exactly what I expected.

Everything would be much better if Kayak stopped nosing into my business with Delta.

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

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

Food is terrible. Flight is outdated and seats are not comfy.

Good flight. On time. Boarding and seating was easy. Crew were really friendly, yet professional. Bathroom (by cockpit) was small but serviceable. Some the seats were showing some notable wear & tear, but were comfy. Very happy UA customer. TY! 🤛🏽💗

Boarding was easy. RDU gates can get crowded, be prepared to be patient. Flight was smooth, with excellent service. Pilots really provided a lot of visibility into flight details. Plane and seats were clean and serviceable. TY!

All flights were on time and boarding was issue free

Water service would be great. The way they board is terrible. Slow passengers first😂😂 They need to smart up a bit

Got automatically assigned middle seats unless you fork out extra money for a seat assignment, not impressed.

Late by nearly 2 hours due to taking that long to change a tire on the plane.

The boarding on this Air Canada flight from Toronto to Barcelona was a complete mess. The ticket was written under United but they were actually Air Canada flights. We went from one end of the Toronto airport to the complete other side.

Check in for 5am flight at RDU was hampered by American check in counters being seriously understaffed , was told even supervisor called out. Took so long in line for special services check in that we missed our 5am departure even after arriving at 3:30am. Had to be rescheduled to later flight from Charlotte to St Thomas.

Awfully rude American worker at door when we started boarding flight. Then, walk into a blazing hot airplane with no air conditioning until twenty minutes into the flight. Free entertainment was non existent! My husband, along with the fellow passenger in our row, and I could not get entertainment to work, no WIFI! Really?? Been flying American a long time. Was very disappointed.

Flight delayed and missed connection. Rescheduled flight cancelled after 6 hrs wait. Rerouted thru ORD, flight cancelled, overnight stay in ORD. Still in the air on new flight!

Very below average , plane from Dallas to Toyko was very poor designed plane. I had to sit for 13 hours next to fat man. Really bad seat and entertainment screen sucked

This flight never occurred because AA couldn’t get their act together.

Terrible. The flight was delayed two hours due to weather. Then when we got on the plane, the first pilot ended up timing out and we had to wait for a second pilot. Second pile came on board and we tax it out. Had to return back to the gate because of an unruly passenger. Then the copilot timed out. Had to wait for new copilot. Also had to wait for maintenance to check for fuel. Then found out the second pilot timed out and we had to wait for a third pilot. Was ready to go and then needed maintenance again for another issue. In the end, it was 2 o’clock in the morning when they announced that the flight couldn’t go because the third pilot and the second copilot had timed out.

One of the best flights I’ve had. So smooth.

Everything was great except boarding for the flight from Charlotte to Raleigh and seating from New Orleans to Charlotte.

For an over three hour long flight one pack of cookies was not enough.

Unlike other airlines, did not allow for basic economy flexibility for new COVID spike. Disappointing.

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

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!!!

I liked the price of the flight and the chance to buy a seat with no person seated in the middle seat.. Also the flight was right on time.

Flight got delayed for 3.5 hours, and for the first hour after the departure time there was no update from the gate folks...

I am very disappointed with Frontier Airlines. They cancelled our flight because they couldn't find a crew member, and then didn't get us to our connecting flight. We had to cancel our whole vacation. We were promised flight and hotel vouchers, but they never sent them.

Over an hour delay in departure but I was notified beforehand. Another delay on tarmac upon arrival at LGA. We ended up departing the plane almost 2 hours later than expected

Attendance were to busy bull shitting to pay attention to the guest, had an attude problem.

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

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