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$99+ Cheap flights from Raleigh (RDU) to Boulder, CO

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — DEN
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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The best prices from Raleigh-Durham to Boulder are usually found in April or May, booked 84 days in advance, depart on a Saturday or Tuesday and return on a Friday

Cheap flight deals from Raleigh to Boulder

Discover tips and strategies to find the most affordable flight options for your journey from Raleigh (RDU) to Boulder (BD9). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2024.

Round-trip from

$126
(Cheapflightsfares)

One-way from

$99
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$379
From Raleigh-Durham to Boulder
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One-way flight from Raleigh-Durham to Boulder
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High demand for flights, 7% potential price rise
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Best time to find cheap flights, 3% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from Raleigh to Boulder

Cheapest flights from Raleigh to Boulder
Explore the most affordable flight options available from Raleigh to Boulder. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2024.

This FlightHub deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/309:27 pmRDU - DEN
1 stop28h 17mFrontier
Mon 1/137:50 amDEN - RDU
1 stop6h 53mFrontier
Deal found 12/17$226
This Delta deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/315:59 pmRDU - DEN
1 stop5h 46mDelta
Wed 1/16:00 amDEN - RDU
1 stop8h 03mDelta
Deal found 12/17$540

Find flights from Raleigh to Boulder within your budget

Customize your flight search to find flights from Raleigh to Boulder that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Thu 2/20

5:20 pm-7:32 pm

Nonstop4h 12m

Denver Intl

Mon 2/24

11:00 am-4:20 pm

Nonstop3h 20m

$126

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Sat 2/1

8:18 am-11:34 pm

2 stops17h 16m

Denver Intl

Sat 2/8

12:11 pm-9:00 am

2 stops18h 49m

$194

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Thu 2/20

3:55 pm-10:42 pm

1 stop8h 47m

Denver Intl

Mon 2/24

12:29 am-9:20 am

1 stop6h 51m

$217

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Sun 2/9

7:30 am-9:40 am

Nonstop4h 10m

Denver Intl

Wed 2/12

11:45 am-5:00 pm

Nonstop3h 15m

$238

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Tue 2/11

9:51 am-2:25 pm

1 stop6h 34m

Denver Intl

Thu 2/20

6:29 am-4:45 pm

1 stop8h 16m

$256

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Tue 1/14

8:00 am-10:08 am

Nonstop4h 08m

Denver Intl

Tue 1/21

5:49 pm-11:07 pm

Nonstop3h 18m

$257

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Wed 5/7

8:30 pm-5:27 pm

1 stop22h 57m

Denver Intl

Fri 5/9

6:30 pm-10:48 am

1 stop14h 18m

$285

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Tue 2/18

5:00 am-9:38 am

1 stop6h 38m

$99

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Thu 2/6

5:20 pm-7:32 pm

Nonstop4h 12m

$103

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

Thu 2/20

7:02 pm-10:46 pm

1 stop5h 44m

$118

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 16 results
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Best time to book a flight from Raleigh to Boulder

Have a flexible travel schedule? Discover the best time to fly to Boulder from Raleigh with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Travel insights for flights from Raleigh to Boulder

Get recent, data-driven insights about flights from Raleigh to Boulder including ideal travel times, pricing trends, and more.

How far ahead should I book a flight from Raleigh to Boulder?

Use this chart to determine the optimal time to book a round-trip flight from Raleigh to Boulder. Price data was last updated on December 13, 2024.

To ensure you get the cheapest price possible for a flight from Raleigh to Boulder, you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

What is the cheapest month to book a flight from Raleigh to Boulder?

Currently, October is the cheapest month in which you can book a flight from Raleigh to Boulder (average of $197). Flying from Raleigh to Boulder in March is currently the most expensive (average of $271). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from RDU to BD9?

Find hourly flight availability from Raleigh to Boulder. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Raleigh to Boulder as you normally would.

What is the cheapest day to fly from Raleigh to Boulder?

Use this chart to determine the cheapest time to fly round-trip from Raleigh to Boulder. Price data was last updated on June 30, 2024.

Travelers seeking maximum savings on their Raleigh to Boulder flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Boulder by month

Plan your trip to Boulder by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boulder ranges from 0.5 - 2.3 inches per month. May is typically the wettest month, when rainfall can reach 2.3 in. January is typically the driest time to visit Boulder when rainfall is around 0.5 in.

Temperature in Boulder by month

Plan your trip to Boulder by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boulder, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boulder

Get insights into the airlines that provide service to Boulder. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boulder. Reviews last updated December 18, 2024.
See what other customers who have flown with Frontier, Southwest and United Airlines from Raleigh to Boulder have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,552 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,279 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Crew

8.7

Food

7.2

Entertainment

7.7

Overall

8.1

Boarding

8.2

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Raleigh to Boulder. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Raleigh to Boulder?

    Located just 11.1 mi from the city center, Raleigh-Durham is the airport most travelers will use when flying to Boulder from Raleigh. Booking flights from Raleigh-Durham (RDU) to Boulder should be relatively easy as there is 1 daily outbound flight to Boulder from 6 different airlines.

  • How popular is this Raleigh to Boulder flight route?

    Flights from Raleigh-Durham to Boulder have been viewed 165 times in the past calendar month.

  • What are the cheapest airlines to fly from Raleigh to Boulder one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $99. However, be on the lookout for offers from Frontier and United Airlines, as they are both options that can get you from Raleigh to Boulder for a low price.

  • What are the most reliable airlines from Raleigh to Boulder?

    The top 3 most reliable airlines when flying from Raleigh to Boulder are United Airlines (87%), Frontier (82%) and Southwest (72%).

  • What are the cheapest flights from Raleigh to Boulder?

    The cheapest flight price from Raleigh to Boulder is $79. On average you can expect to pay $900. The most popular route, (Raleigh-Durham - Denver Intl), can usually be booked for $138.

  • Can I find deals for flights from Raleigh to Boulder that include hotel bookings?

    Yes. In addition to deals on Raleigh to Boulder flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Raleigh to Boulder?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Raleigh to Boulder.

  • Can I find deals for business class flights from Raleigh to Boulder?

    Yes. Cheapflights offers flight deals from Raleigh to Boulder by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Raleigh to Boulder?

    Currently, October is the cheapest month in which you can book a flight from Raleigh to Boulder (average of $197). Flying from Raleigh to Boulder in March is currently the most expensive (average of $271). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 6 airlines flying from Raleigh to Boulder

Discover the top 6 airlines that operate flights from Raleigh to Boulder. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$70Average$254FlexibilityNo cancel feeOn-time83%
FrontierCheapest$82Average$228FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$178Average$405FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$184Average$440FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$198Average$371FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$357FlexibilityNo cancel feeOn-timeN/A
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