$68+ 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
Apr 29 — May 61
Round-trip
1 adult, Economy
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Find cheap flights from Raleigh to Boulder with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Raleigh-Durham to Boulder are usually found in January or September, booked 59 days in advance, depart on a Thursday or Friday and return on a Thursday
Cheap flight deals from Raleigh to Boulder
Cheapest
Best
Last-minute
One-way
Cheapest flights from Raleigh to BoulderExplore 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 March 30, 2026.
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 March 30, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/26. 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.
Sun 5/1712:26 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Sat 5/236:00 am
DEN
- RDU
1 stop6h 33m
Frontier
Deal found 3/26![Frontier logo]()
$150
This Frontier deal was found by Cheapflights users on 3/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/1712:26 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Wed 5/2011:54 pm
DEN
- RDU
1 stop10h 05m
Frontier
Deal found 3/30![Frontier logo]()
$151
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/214:00 pm
RDU
- DEN
1 stop8h 29m
Frontier
Fri 4/246:20 am
DEN
- RDU
1 stop10h 12m
Frontier
Deal found 3/27![Frontier logo]()
$152
This Expedia deal was found by Cheapflights users on 3/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/136:43 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Thu 4/1611:59 pm
DEN
- RDU
1 stop8h 00m
Frontier
Deal found 3/30![Frontier logo]()
$154
This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/32:17 pm
RDU
- DEN
1 stop20h 07m
Frontier
Tue 6/911:40 pm
DEN
- RDU
1 stop29h 41m
Frontier
Deal found 3/27![Frontier logo]()
$155
This Super.com deal was found by Cheapflights users on 3/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/249:49 pm
RDU
- DEN
Nonstop4h 10m
Frontier
Fri 5/13:45 pm
DEN
- RDU
Nonstop3h 19m
Frontier
Deal found 3/27![Frontier logo]()
$156
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/133:57 pm
RDU
- DEN
1 stop9h 07m
Frontier
Wed 4/221:09 pm
DEN
- RDU
1 stop8h 06m
Frontier
Deal found 3/27![Frontier logo]()
$157
This CheapOair deal was found by Cheapflights users on 3/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/812:26 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Sun 5/106:03 am
DEN
- RDU
Nonstop3h 28m
Frontier
Deal found 3/27![Frontier logo]()
$158
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/179:49 pm
RDU
- DEN
Nonstop4h 10m
Frontier
Sun 4/2611:59 pm
DEN
- RDU
1 stop6h 47m
Frontier
Deal found 3/27![Frontier logo]()
$159
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/236:10 am
RDU
- DEN
1 stop7h 59m
Frontier
Mon 4/271:07 pm
DEN
- RDU
1 stop8h 18m
Frontier
Deal found 3/27![Frontier logo]()
$160
This Super.com deal was found by Cheapflights users on 3/29. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/116:47 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Wed 4/1511:40 am
DEN
- RDU
Nonstop3h 25m
Frontier
Deal found 3/29![Frontier logo]()
$161
Best flights from Raleigh to BoulderDiscover carefully curated flight deals from Raleigh to Boulder that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 30, 2026.
Discover carefully curated flight deals from Raleigh to Boulder that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 30, 2026.
This Expedia deal was found by Cheapflights users on 3/30. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2112:54 pm
RDU
- DEN
1 stop11h 30m
Frontier
Tue 6/27:00 am
DEN
- RDU
1 stop7h 00m
Frontier
Deal found 3/30![Frontier logo]()
$172
This Southwest deal was found by Cheapflights users on 3/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/254:50 pm
RDU
- DEN
1 stop6h 45m
Southwest
Sat 5/210:15 am
DEN
- RDU
2 stops6h 40m
Southwest
Deal found 3/26![Southwest logo]()
$236
This Southwest deal was found by Cheapflights users on 3/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/188:00 am
RDU
- DEN
2 stops7h 40m
Southwest
Sat 4/251:00 pm
DEN
- RDU
1 stop5h 55m
Southwest
Deal found 3/27![Southwest logo]()
$240
This CheapOair deal was found by Cheapflights users on 3/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/248:06 pm
RDU
- DEN
1 stop28h 48m
Frontier
Mon 6/2910:00 am
DEN
- RDU
1 stop12h 20m
Frontier
Deal found 3/30![Frontier logo]()
$251
This Southwest deal was found by Cheapflights users on 3/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/98:00 am
RDU
- DEN
2 stops7h 40m
Southwest
Tue 5/128:45 am
DEN
- RDU
2 stops7h 15m
Southwest
Deal found 3/26![Southwest logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Thu 5/72:32 pm
RDU
- DEN
2 stops9h 52m
Frontier
Mon 5/1111:59 pm
DEN
- RDU
1 stop6h 52m
Frontier
Deal found 3/30![Frontier logo]()
$252
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/44:50 pm
RDU
- DEN
2 stops8h 55m
Southwest
Wed 5/62:05 pm
DEN
- RDU
2 stops8h 05m
Southwest
Deal found 3/30![Southwest logo]()
$287
This Frontier deal was found by Cheapflights users on 3/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/2212:26 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Sat 5/3011:59 pm
DEN
- RDU
1 stop6h 52m
Frontier
Deal found 3/30![Frontier logo]()
$294
This Southwest deal was found by Cheapflights users on 3/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/712:50 pm
RDU
- DEN
2 stops9h 05m
Southwest
Sun 5/1011:55 pm
DEN
- RDU
1 stop7h 35m
Southwest
Deal found 3/27![Southwest logo]()
$302
This Southwest deal was found by Cheapflights users on 3/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/205:15 am
RDU
- DEN
Nonstop3h 50m
Southwest
Mon 4/207:05 pm
DEN
- RDU
Nonstop3h 15m
Southwest
Deal found 3/30![Southwest logo]()
$317
This Southwest deal was found by Cheapflights users on 3/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/115:15 pm
RDU
- DEN
Nonstop3h 50m
Southwest
Sat 4/1810:15 am
DEN
- RDU
Nonstop3h 20m
Southwest
Deal found 3/28![Southwest logo]()
$357
This Southwest deal was found by Cheapflights users on 3/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/202:00 pm
RDU
- DEN
2 stops7h 50m
Southwest
Tue 4/211:15 pm
DEN
- RDU
2 stops6h 20m
Southwest
Deal found 3/28![Southwest logo]()
$367
Last-minute flights from Raleigh to BoulderDiscover last-minute flight deals from Raleigh to Boulder. Data last updated March 30, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Boulder. Data last updated March 30, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 3/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/45:45 am
RDU
- DEN
1 stop13h 13m
Frontier
Fri 4/1012:13 am
DEN
- RDU
1 stop10h 01m
Frontier
Deal found 3/28![Frontier logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 3/28. 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.
Sun 4/53:57 pm
RDU
- DEN
1 stop9h 07m
Frontier
Sat 4/116:00 am
DEN
- RDU
1 stop15h 44m
Frontier
Deal found 3/28![Frontier logo]()
$204
This Frontier deal was found by Cheapflights users on 3/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/82:11 pm
RDU
- DEN
1 stop10h 58m
Frontier
Fri 4/1012:13 am
DEN
- RDU
1 stop10h 01m
Frontier
Deal found 3/28![Frontier logo]()
$188
This Frontier deal was found by Cheapflights users on 3/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:47 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Sun 4/1212:13 am
DEN
- RDU
1 stop9h 01m
Frontier
Deal found 3/26![Frontier logo]()
$154
This Super.com deal was found by Cheapflights users on 3/26. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:00 am
RDU
- DEN
1 stop8h 09m
Frontier
Tue 4/1411:59 pm
DEN
- RDU
1 stop8h 00m
Frontier
Deal found 3/26![Frontier logo]()
$157
This Expedia deal was found by Cheapflights users on 3/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:47 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Sun 4/126:00 am
DEN
- RDU
1 stop27h 42m
Frontier
Deal found 3/26![Frontier logo]()
$179
This Super.com deal was found by Cheapflights users on 3/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:00 am
RDU
- DEN
1 stop8h 09m
Frontier
Fri 4/106:00 am
DEN
- RDU
1 stop28h 17m
Frontier
Deal found 3/27![Frontier logo]()
$207
One-way flights from Raleigh to BoulderSearch for one-way flight options from Raleigh to Boulder. Find affordable one-way fares based on user searches. Data last updated March 30, 2026.
Search for one-way flight options from Raleigh to Boulder. Find affordable one-way fares based on user searches. Data last updated March 30, 2026.
This WAYA deal was found by Cheapflights users on 3/27. 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 WAYA is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/163:42 pm
RDU
- DEN
1 stop8h 47m
Frontier
Deal found 3/27![Frontier logo]()
$68
This Frontier deal was found by Cheapflights users on 3/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:49 pm
RDU
- DEN
Nonstop4h 10m
Frontier
Deal found 3/28![Frontier logo]()
$69
This Super.com deal was found by Cheapflights users on 3/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/154:00 pm
RDU
- DEN
1 stop8h 29m
Frontier
Deal found 3/27![Frontier logo]()
$71
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/284:00 pm
RDU
- DEN
1 stop8h 29m
Frontier
Deal found 3/27![Frontier logo]()
$72
This Super.com deal was found by Cheapflights users on 3/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:16 am
RDU
- DEN
1 stop11h 13m
Frontier
Deal found 3/27![Frontier logo]()
$77
This Frontier deal was found by Cheapflights users on 3/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2612:54 pm
RDU
- DEN
1 stop11h 30m
Frontier
Deal found 3/26![Frontier logo]()
$78
This Super.com deal was found by Cheapflights users on 3/27. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/245:47 pm
RDU
- DEN
1 stop7h 22m
Frontier
Deal found 3/27![Frontier logo]()
$79
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/154:27 pm
RDU
- DEN
1 stop8h 37m
Frontier
Deal found 3/27![Frontier logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Tue 5/196:15 am
RDU
- DEN
1 stop18h 09m
Frontier
Deal found 3/30![Frontier logo]()
$82
This Super.com deal was found by Cheapflights users on 3/29. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/226:55 pm
RDU
- DEN
Nonstop4h 06m
Frontier
Deal found 3/29![Frontier logo]()
$83
This Super.com deal was found by Cheapflights users on 3/30. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/173:49 pm
RDU
- DEN
1 stop8h 40m
Frontier
Deal found 3/30![Frontier logo]()
$84
This Frontier deal was found by Cheapflights users on 3/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/275:37 pm
RDU
- DEN
1 stop7h 32m
Frontier
Deal found 3/27![Frontier logo]()
$85
Find flight deals from Raleigh to Boulder
Keep the following information in mind while searching for Raleigh to Boulder flight deals. Data was last updated March 30, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $150 (Kiwi.com) |
One-way from | $68 (WAYA) |
Popular in | June |
Cheapest in | January |
Average price | $337 |
Cheapflights Fare Finder
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 March 30, 2026.
Use the filters below to find and compare flights from Raleigh to Boulder that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Thu 5/21
12:54 pm-10:24 pm
1 stop11h 30m
Denver Intl
Tue 6/2
7:00 am-4:00 pm
1 stop7h 00m
$172
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Sat 4/25
4:50 pm-9:35 pm
1 stop6h 45m
Denver Intl
Sat 5/2
10:15 am-6:55 pm
2 stops6h 40m
$236
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Sat 4/18
8:00 am-1:40 pm
2 stops7h 40m
Denver Intl
Sat 4/25
1:00 pm-8:55 pm
1 stop5h 55m
$240
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Sat 5/9
8:00 am-1:40 pm
2 stops7h 40m
Denver Intl
Tue 5/12
8:45 am-6:00 pm
2 stops7h 15m
$245
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Wed 6/24
8:06 pm-10:54 pm
1 stop28h 48m
Denver Intl
Mon 6/29
10:00 am-12:20 am
1 stop12h 20m
$251
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Thu 5/7
2:32 pm-10:24 pm
2 stops9h 52m
Denver Intl
Mon 5/11
11:59 pm-8:51 am
1 stop6h 52m
$252
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Mon 5/4
4:50 pm-11:45 pm
2 stops8h 55m
Denver Intl
Wed 5/6
2:05 pm-12:10 am
2 stops8h 05m
$287
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Fri 5/22
12:26 pm-2:32 pm
Nonstop4h 06m
Denver Intl
Sat 5/30
11:59 pm-8:51 am
1 stop6h 52m
$294
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Thu 5/7
12:50 pm-7:55 pm
2 stops9h 05m
Denver Intl
Sun 5/10
11:55 pm-9:30 am
1 stop7h 35m
$302
Quickest round-trip
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Mon 4/20
5:15 am-7:05 am
Nonstop3h 50m
Denver Intl
Mon 4/20
7:05 pm-12:20 am
Nonstop3h 15m
$317
Showing 1-10 of 22 resultsSorted by cheapest first
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.
RDU-DEN
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.
Cheapflights Insights
Everything you need to know about your flight from Raleigh to Boulder
RDU-BD9
RDU-DEN
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 March 13, 2026.
To ensure you get the cheapest price possible for a flight from Raleigh to Boulder, you should look to book at least 59 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, January is the cheapest month in which you can book a flight from Raleigh to Boulder (average of $86). Flying from Raleigh to Boulder in June is currently the most expensive (average of $176). 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 March 30, 2026.
One of the essential ways to save on airfare from Raleigh to Boulder is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 45% on airfare.
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 March 28, 2026.
Travelers seeking maximum savings on their Raleigh to Boulder flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday mornings 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 March 30, 2026.
The most flights from RDU to BD9 are scheduled on a Monday (8 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (4 on average).
How much does it cost to fly round-trip from Raleigh to Boulder?
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 March 30, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Raleigh to Boulder have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Food
7.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
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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 March 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$100 | Average$248 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$128 | Average$378 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$157 | Average$342 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$187 | Average$442 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$200 | Average$368 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$200 | Average$409 | FlexibilityNo cancel fee | On-time63% |