$112+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
RDU — DEN
Jul 5 — Jul 121
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 June 5, 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 June 5, 2026.
This Super.com deal was found by Cheapflights users on 5/31. 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.
Mon 9/2812:48 pm
RDU
- DEN
Nonstop4h 04m
Frontier
Sat 10/36:30 am
DEN
- RDU
Nonstop3h 23m
Frontier
Deal found 5/31![Frontier logo]()
$183
This Frontier deal was found by Cheapflights users on 5/31. 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 9/2812:48 pm
RDU
- DEN
Nonstop4h 04m
Frontier
Wed 9/306:30 am
DEN
- RDU
Nonstop3h 23m
Frontier
Deal found 5/31![Frontier logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Wed 8/56:15 am
RDU
- DEN
1 stop9h 46m
Frontier
Tue 8/1811:42 pm
DEN
- RDU
1 stop6h 21m
Frontier
Deal found 6/3![Frontier logo]()
$186
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 6/306:15 am
RDU
- DEN
1 stop9h 44m
Frontier
Wed 7/15:05 am
DEN
- RDU
1 stop16h 11m
Frontier
Deal found 6/3![Frontier logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Mon 8/106:15 am
RDU
- DEN
1 stop9h 46m
Frontier
Sat 8/1511:59 pm
DEN
- RDU
1 stop6h 12m
Frontier
Deal found 6/4![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/410:22 pm
RDU
- DEN
2 stops25h 43m
Frontier
Tue 8/1111:46 pm
DEN
- RDU
1 stop6h 25m
Frontier
Deal found 6/3![Frontier logo]()
$197
This Frontier deal was found by Cheapflights users on 5/31. 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 10/112:48 pm
RDU
- DEN
Nonstop4h 04m
Frontier
Sat 10/36:30 am
DEN
- RDU
Nonstop3h 23m
Frontier
Deal found 5/31![Frontier logo]()
$199
This Frontier deal was found by Cheapflights users on 5/31. 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 9/2912:48 pm
RDU
- DEN
Nonstop4h 04m
Frontier
Tue 10/66:30 am
DEN
- RDU
Nonstop3h 23m
Frontier
Deal found 5/31![Frontier logo]()
$203
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Wed 8/56:15 am
RDU
- DEN
1 stop9h 46m
Frontier
Mon 8/1711:59 pm
DEN
- RDU
1 stop10h 00m
Frontier
Deal found 6/3![Frontier logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 6/4. 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 8/46:15 am
RDU
- DEN
1 stop17h 50m
Frontier
Sat 8/811:59 pm
DEN
- RDU
1 stop20h 45m
Frontier
Deal found 6/4![Frontier logo]()
$205
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Sat 8/86:15 am
RDU
- DEN
1 stop9h 46m
Frontier
Wed 8/126:30 am
DEN
- RDU
1 stop14h 05m
Frontier
Deal found 6/4![Frontier logo]()
$207
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 June 5, 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 June 5, 2026.
This Super.com deal was found by Cheapflights users on 5/31. 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 8/1312:26 pm
RDU
- DEN
Nonstop3h 53m
Frontier
Sun 8/166:03 am
DEN
- RDU
Nonstop3h 28m
Frontier
Deal found 5/31![Frontier logo]()
$335
This Southwest deal was found by Cheapflights users on 5/31. 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 7/44:05 pm
RDU
- DEN
Nonstop3h 45m
Southwest
Wed 7/87:15 pm
DEN
- RDU
Nonstop3h 25m
Southwest
Deal found 5/31![Southwest logo]()
$517
This Delta deal was found by Cheapflights users on 6/1. 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 7/77:10 pm
RDU
- DEN
1 stop6h 17m
Delta
Fri 7/106:35 am
DEN
- RDU
1 stop13h 10m
Delta
Deal found 6/1![Delta logo]()
$520
This Gotogate deal was found by Cheapflights users on 5/31. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/2110:14 am
RDU
- DEN
1 stop23h 47m
Frontier
Fri 6/265:29 pm
DEN
- RDU
1 stop18h 12m
Frontier
Deal found 5/31![Frontier logo]()
$380
This Super.com deal was found by Cheapflights users on 5/31. 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 6/125:07 pm
RDU
- DEN
1 stop7h 57m
Frontier
Sun 6/146:03 am
DEN
- RDU
Nonstop3h 28m
Frontier
Deal found 5/31![Frontier logo]()
$451
This Southwest deal was found by Cheapflights users on 6/1. 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.
Tue 7/74:10 pm
RDU
- DEN
2 stops7h 30m
Southwest
Tue 7/711:50 pm
DEN
- RDU
1 stop7h 30m
Southwest
Deal found 6/1![Southwest logo]()
$538
This Southwest deal was found by Cheapflights users on 6/3. 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 7/186:35 pm
RDU
- DEN
1 stop5h 45m
Southwest
Sat 7/2511:55 am
DEN
- RDU
2 stops8h 05m
Southwest
Deal found 6/3![Southwest logo]()
$542
This Southwest deal was found by Cheapflights users on 6/2. 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 7/258:35 am
RDU
- DEN
2 stops6h 45m
Southwest
Tue 7/2812:20 pm
DEN
- RDU
2 stops6h 50m
Southwest
Deal found 6/2![Southwest logo]()
$547
This Southwest deal was found by Cheapflights users on 5/31. 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 8/1310:20 am
RDU
- DEN
2 stops7h 40m
Southwest
Sun 8/166:05 am
DEN
- RDU
1 stop4h 50m
Southwest
Deal found 5/31![Southwest logo]()
$550
This Southwest deal was found by Cheapflights users on 6/2. 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.
Wed 7/18:25 am
RDU
- DEN
2 stops7h 20m
Southwest
Sat 7/46:40 am
DEN
- RDU
2 stops8h 15m
Southwest
Deal found 6/2![Southwest logo]()
$555
This Southwest deal was found by Cheapflights users on 6/4. 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 7/28:40 am
RDU
- DEN
2 stops7h 15m
Southwest
Thu 7/97:40 am
DEN
- RDU
2 stops6h 35m
Southwest
Deal found 6/4![Southwest logo]()
$555
Last-minute flights from Raleigh to BoulderDiscover last-minute flight deals from Raleigh to Boulder. Data last updated June 5, 2026 and is based on user searches.
Discover last-minute flight deals from Raleigh to Boulder. Data last updated June 5, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 6/2310:22 pm
RDU
- DEN
1 stop26h 42m
Frontier
Wed 7/112:18 pm
DEN
- RDU
1 stop8h 58m
Frontier
Deal found 6/3![Frontier logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Wed 6/242:36 pm
RDU
- DEN
1 stop10h 28m
Frontier
Wed 7/112:18 pm
DEN
- RDU
1 stop8h 58m
Frontier
Deal found 6/3![Frontier logo]()
$238
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Sat 6/2711:47 am
RDU
- DEN
1 stop12h 29m
Frontier
Wed 7/111:46 pm
DEN
- RDU
1 stop10h 13m
Frontier
Deal found 6/4![Frontier logo]()
$235
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Mon 6/2912:10 pm
RDU
- DEN
1 stop27h 49m
Frontier
Sat 7/46:30 am
DEN
- RDU
1 stop15h 52m
Frontier
Deal found 6/3![Frontier logo]()
$225
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 6/306:15 am
RDU
- DEN
1 stop9h 44m
Frontier
Wed 7/15:05 am
DEN
- RDU
1 stop16h 11m
Frontier
Deal found 6/3![Frontier logo]()
$188
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 6/306:15 am
RDU
- DEN
1 stop9h 44m
Frontier
Tue 7/74:10 pm
DEN
- RDU
2 stops29h 54m
Frontier
Deal found 6/3![Frontier logo]()
$208
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 6/308:00 am
RDU
- DEN
2 stops15h 44m
Frontier
Sat 7/119:58 am
DEN
- RDU
1 stop12h 05m
Frontier
Deal found 6/3![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Sat 7/46:15 am
RDU
- DEN
1 stop9h 44m
Multiple Airlines
Tue 7/711:59 pm
DEN
- RDU
1 stop6h 59m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$241
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Wed 7/811:56 am
RDU
- DEN
1 stop12h 09m
Frontier
Wed 7/158:55 am
DEN
- RDU
1 stop10h 54m
Frontier
Deal found 6/4![Frontier logo]()
$242
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 7/286:15 am
RDU
- DEN
1 stop9h 45m
Frontier
Thu 8/1311:46 pm
DEN
- RDU
1 stop6h 25m
Frontier
Deal found 6/5![Frontier logo]()
$226
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 June 5, 2026.
Search for one-way flight options from Raleigh to Boulder. Find affordable one-way fares based on user searches. Data last updated June 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Fri 8/219:40 am
RDU
- DEN
2 stops40h 14m
Frontier
Deal found 6/3![Frontier logo]()
$112
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 8/2012:54 pm
RDU
- DEN
1 stop11h 22m
Frontier
Deal found 6/3![Frontier logo]()
$114
This Kiwi.com deal was found by Cheapflights users on 6/3. 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 9/112:54 pm
RDU
- DEN
2 stops10h 50m
Frontier
Deal found 6/3![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Sat 7/46:15 am
RDU
- DEN
1 stop9h 44m
Frontier
Deal found 6/4![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 6/1. 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 8/1812:54 pm
RDU
- DEN
1 stop22h 04m
Frontier
Deal found 6/1![Frontier logo]()
$122
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Sat 8/298:50 am
RDU
- DEN
2 stops14h 35m
Multiple Airlines
Deal found 6/4![Multiple Airlines logo]()
$124
This Kiwi.com deal was found by Cheapflights users on 6/3. 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.
Wed 9/28:06 pm
RDU
- DEN
2 stops28h 10m
Frontier
Deal found 6/3![Frontier logo]()
$125
This Kiwi.com deal was found by Cheapflights users on 6/4. 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.
Mon 8/37:32 pm
RDU
- DEN
1 stop14h 35m
Frontier
Deal found 6/4![Frontier logo]()
$128
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Fri 7/311:50 am
RDU
- DEN
1 stop28h 09m
Frontier
Deal found 6/5![Frontier logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Sat 7/2512:04 pm
RDU
- DEN
1 stop12h 24m
Frontier
Deal found 6/5![Frontier logo]()
$130
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 June 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $186 (Kiwi.com) |
One-way from | $112 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $366 |
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 June 5, 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 8/13
12:26 pm-2:19 pm
Nonstop3h 53m
Denver Intl
Sun 8/16
6:03 am-11:31 am
Nonstop3h 28m
$335
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Sun 6/21
10:14 am-8:01 am
1 stop23h 47m
Denver Intl
Fri 6/26
5:29 pm-1:41 pm
1 stop18h 12m
$380
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Fri 6/12
5:07 pm-11:04 pm
1 stop7h 57m
Denver Intl
Sun 6/14
6:03 am-11:31 am
Nonstop3h 28m
$451
Quickest round-trip
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Sat 7/4
4:05 pm-5:50 pm
Nonstop3h 45m
Denver Intl
Wed 7/8
7:15 pm-12:40 am
Nonstop3h 25m
$517
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Tue 7/7
7:10 pm-11:27 pm
1 stop6h 17m
Denver Intl
Fri 7/10
6:35 am-9:45 pm
1 stop13h 10m
$520
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Tue 7/7
4:10 pm-9:40 pm
2 stops7h 30m
Denver Intl
Tue 7/7
11:50 pm-9:20 am
1 stop7h 30m
$538
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Sat 7/18
6:35 pm-10:20 pm
1 stop5h 45m
Denver Intl
Sat 7/25
11:55 am-10:00 pm
2 stops8h 05m
$542
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Sat 7/25
8:35 am-1:20 pm
2 stops6h 45m
Denver Intl
Tue 7/28
12:20 pm-9:10 pm
2 stops6h 50m
$547
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Thu 8/13
10:20 am-4:00 pm
2 stops7h 40m
Denver Intl
Sun 8/16
6:05 am-12:55 pm
1 stop4h 50m
$550
RaleighDenver
RDU - DEN
RDUDEN
Raleigh-Durham
Wed 7/1
8:25 am-1:45 pm
2 stops7h 20m
Denver Intl
Sat 7/4
6:40 am-4:55 pm
2 stops8h 15m
$555
Showing 1-10 of 23 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
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 June 5, 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 49% on airfare.
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 June 5, 2026.
The most flights from RDU to BD9 are scheduled on a Monday (7 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 on average).
How much does it cost to fly round-trip from Raleigh to Boulder?
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 May 30, 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. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 June 5, 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.
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Food
7.0
Crew
8.6
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
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.
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Raleigh and Boulder flights
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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 June 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$249 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$157 | Average$342 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$197 | Average$427 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$198 | Average$422 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$199 | Average$393 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$408 | FlexibilityNo cancel fee | On-timeN/A |