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$87+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — DEN
janv. 26 — févr. 21
dim. 1/26
dim. 2/2
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 janvier 21, 2025.

Round-trip from

$121
(Kiwi.com)

One-way from

$87
(Cheapflightsfares)

Popular in

December

Cheapest in

April

Average price

$267
From Raleigh-Durham to Boulder
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One-way flight from Raleigh-Durham to Boulder
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Highest demand for flights based on searches. 9% potential increase in price ($29 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in January 2025
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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 janvier 21, 2025.

This Kiwi.com deal was found by Cheapflights users on 1/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 3/35:20 pmRDU - DEN
Nonstop4h 12mFrontier
jeu. 3/66:20 pmDEN - RDU
1 stop10h 36mFrontier
Deal found 1/20$121
This American Airlines deal was found by Cheapflights users on 1/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 2/186:03 pmRDU - DEN
1 stop7h 17mAmerican Airlines
lun. 2/2412:29 amDEN - RDU
1 stop6h 51mAmerican Airlines
Deal found 1/20$199
This JetBlue deal was found by Cheapflights users on 1/20. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 3/264:45 pmRDU - DEN
1 stop7h 03mJetBlue
lun. 3/3110:35 pmDEN - RDU
1 stop8h 30mJetBlue
Deal found 1/20$245
This Delta deal was found by Cheapflights users on 1/20. 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.
mer. 2/125:30 amRDU - DEN
1 stop6h 29mDelta
dim. 2/166:05 amDEN - RDU
1 stop5h 32mDelta
Deal found 1/20$277
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sam. 6/217:55 pmRDU - DEN
1 stop15h 24mSun Country Air
jeu. 7/37:15 pmDEN - RDU
1 stop14h 32mSun Country Air
Deal found 1/20$280
This Booking.com deal was found by Cheapflights users on 1/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 5/215:28 pmRDU - DEN
Nonstop4h 04mMultiple Airlines
ven. 5/236:30 pmDEN - RDU
1 stop14h 12mMultiple Airlines
Deal found 1/20$283
This United deal was found by Cheapflights users on 1/20. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 2/194:53 pmRDU - DEN
1 stop8h 37mUnited Airlines
ven. 2/215:40 pmDEN - RDU
Nonstop3h 16mUnited Airlines
Deal found 1/20$287

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 janvier 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

lun. 3/3

5:20 pm-7:32 pm

Nonstop4h 12m

Denver Intl

jeu. 3/6

6:20 pm-6:56 am

1 stop10h 36m

$121

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mar. 2/18

6:03 pm-11:20 pm

1 stop7h 17m

Denver Intl

lun. 2/24

12:29 am-9:20 am

1 stop6h 51m

$199

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mer. 3/26

4:45 pm-9:48 pm

1 stop7h 03m

Denver Intl

lun. 3/31

10:35 pm-9:05 am

1 stop8h 30m

$245

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mer. 2/12

5:30 am-9:59 am

1 stop6h 29m

Denver Intl

dim. 2/16

6:05 am-1:37 pm

1 stop5h 32m

$277

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

sam. 6/21

7:55 pm-9:19 am

1 stop15h 24m

Denver Intl

ven. 7/4

7:15 pm-10:43 am

1 stop13h 28m

$280

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mer. 5/21

5:28 pm-7:32 pm

Nonstop4h 04m

Denver Intl

ven. 5/23

6:30 pm-10:42 am

1 stop14h 12m

$283

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mer. 2/19

4:46 pm-11:59 pm

1 stop9h 13m

Denver Intl

ven. 2/21

5:40 pm-10:56 pm

Nonstop3h 16m

$287

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mer. 4/16

5:20 pm-7:31 pm

Nonstop4h 11m

$87

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mer. 3/5

5:45 pm-7:50 pm

Nonstop4h 05m

$89

RaleighDenver

RDU - DEN

RDUDEN

Raleigh-Durham

mer. 2/19

6:03 pm-11:20 pm

1 stop7h 17m

$100

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

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 January 17, 2025.

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 $278). 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 janvier 21, 2025.

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.

Weekly flight availability from Raleigh to Boulder

Explore weekly flight availability from Raleigh to Boulder. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated janvier 21, 2025.

The most flights from RDU to BD9 are scheduled on a Monday (8 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (1 on average).

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 janvier 21, 2025.
See what other customers who have flown with United Airlines, Frontier and American 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
4,662 reviews

Comfort

8.1

Crew

8.7

Overall

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

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
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Overall

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

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
9,706 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Overall

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

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
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Overall

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

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
3,201 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Overall

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

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
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Comfort

8.1

Crew

8.7

Overall

8.1

Food

7.2

Entertainment

7.7

Boarding

8.2

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 are 4 daily outbound flights to Boulder from 6 different airlines.

  • How popular is this Raleigh to Boulder flight route?

    Flights from Raleigh-Durham to Boulder have been viewed 194 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 Frontier, with whom users have recently found tickets for as low as $87. However, be on the lookout for offers from Southwest and American 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 (81%) and Southwest (53%).

  • What are the cheapest flights from Raleigh to Boulder?

    The cheapest flight price from Raleigh to Boulder is $65. On average you can expect to pay $1,050. The most popular route, (Raleigh-Durham - Denver Intl), can usually be booked for $148.

  • 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 $278). 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 janvier 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$70Average$255FlexibilityNo cancel feeOn-time83%
FrontierCheapest$83Average$229FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$178Average$411FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$183Average$446FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$198Average$374FlexibilityNo cancel feeOn-time71%
DeltaCheapest$216Average$375FlexibilityNo cancel feeOn-timeN/A
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