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$91+ Cheap flights from Charlotte (CLT) 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 3/9. Fares are subject to change and may not be available on all flights or dates of travel.
CLT — DEN
Jan 8 — Jan 151
Thu 1/8
Thu 1/15
1 adult, Economy
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Cheapflights Tip: The best prices from Charlotte Douglas to Boulder are usually found in January or September, booked 81 days in advance, depart on a Thursday or Friday and return on a Thursday

Cheap flight deals from Charlotte to Boulder

Cheapest flights from Charlotte to Boulder
Explore the most affordable flight options available from Charlotte to Boulder. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 9, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/8. 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 12/239:24 amCLT - DEN
1 stop15h 49mFrontier
Thu 1/16:05 amDEN - CLT
Nonstop3h 17mFrontier
Deal found 12/8$148
This Frontier deal was found by Cheapflights users on 12/8. 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 12/222:51 pmCLT - DEN
1 stop10h 13mFrontier
Thu 1/16:05 amDEN - CLT
Nonstop3h 17mFrontier
Deal found 12/8$156
This Frontier deal was found by Cheapflights users on 12/8. 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 12/183:07 pmCLT - DEN
1 stop9h 52mFrontier
Thu 1/16:05 amDEN - CLT
Nonstop3h 17mFrontier
Deal found 12/8$160
This Kiwi.com deal was found by Cheapflights users on 12/8. 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 12/239:24 amCLT - DEN
1 stop15h 49mFrontier
Tue 1/66:10 amDEN - CLT
1 stop11h 36mFrontier
Deal found 12/8$173
This Super.com deal was found by Cheapflights users on 12/7. 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 12/222:51 pmCLT - DEN
1 stop10h 13mFrontier
Thu 12/256:05 amDEN - CLT
Nonstop3h 17mFrontier
Deal found 12/7$175
This Kiwi.com deal was found by Cheapflights users on 12/6. 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 12/183:07 pmCLT - DEN
1 stop9h 52mFrontier
Thu 1/2210:45 amDEN - CLT
1 stop6h 58mFrontier
Deal found 12/6$178
This Kiwi.com deal was found by Cheapflights users on 12/8. 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 12/239:24 amCLT - DEN
1 stop15h 49mFrontier
Mon 1/56:05 amDEN - CLT
Nonstop3h 17mFrontier
Deal found 12/8$179
This Cheapflightsfares deal was found by Cheapflights users on 12/8. 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.
Tue 12/239:24 amCLT - DEN
1 stop15h 49mFrontier
Tue 12/306:25 amDEN - CLT
1 stop5h 43mFrontier
Deal found 12/8$182
This Frontier deal was found by Cheapflights users on 12/8. 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 12/2010:22 pmCLT - DEN
1 stop12h 16mFrontier
Thu 1/16:05 amDEN - CLT
Nonstop3h 17mFrontier
Deal found 12/8$186

Find flight deals from Charlotte to Boulder

Keep the following information in mind while searching for Charlotte to Boulder flight deals. Data was last updated December 9, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$112
(Cheapflightsfares)

One-way from

$91
(Frontier)

Popular in

December

Cheapest in

January

Average price

$315
Provider with most accurate pricing for Charlotte Douglas-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Charlotte Douglas-Denver Intl flights.
Search Deals
From Charlotte Douglas to Boulder
Search Deals
One-way flight from Charlotte Douglas to Boulder
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Charlotte 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 9, 2025.
Use the filters below to find and compare flights from Charlotte to Boulder that are best for you.

Fly from

Charlotte

Fly to

Boulder

Route

Depart

Return

Price

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Wed 2/11

8:00 am-10:00 am

Nonstop4h 00m

Denver Intl

Sat 2/14

5:35 pm-10:48 pm

Nonstop3h 13m

$179

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Sat 1/10

8:00 am-10:00 am

Nonstop4h 00m

Denver Intl

Wed 1/14

5:46 pm-10:59 pm

Nonstop3h 13m

$179

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Fri 1/16

12:55 pm-2:50 pm

Nonstop3h 55m

Denver Intl

Tue 1/20

1:30 pm-6:30 pm

Nonstop3h 00m

$198

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Sun 2/1

8:00 am-10:00 am

Nonstop4h 00m

Denver Intl

Sat 2/7

5:46 pm-10:59 pm

Nonstop3h 13m

$198

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Tue 1/13

4:19 pm-6:16 pm

Nonstop3h 57m

Denver Intl

Thu 1/15

5:46 pm-10:59 pm

Nonstop3h 13m

$198

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Wed 12/24

4:51 pm-9:45 pm

1 stop6h 54m

Denver Intl

Wed 1/7

7:05 am-4:02 pm

1 stop6h 57m

$217

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Sun 1/11

4:19 pm-6:16 pm

Nonstop3h 57m

Denver Intl

Thu 1/15

10:01 am-3:16 pm

Nonstop3h 15m

$217

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Thu 12/25

8:00 am-10:00 am

Nonstop4h 00m

Denver Intl

Thu 1/1

6:00 am-2:13 pm

1 stop6h 13m

$229

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Thu 12/25

8:00 am-10:00 am

Nonstop4h 00m

Denver Intl

Wed 12/31

5:25 pm-10:38 pm

Nonstop3h 13m

$232

CharlotteDenver

CLT - DEN

CLTDEN

Charlotte Douglas

Thu 1/22

5:00 pm-9:05 pm

1 stop6h 05m

Denver Intl

Wed 1/28

1:30 pm-6:30 pm

Nonstop3h 00m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/8

Showing 1-10 of 19 results
1
2

Best time to book a flight from Charlotte to Boulder

Have a flexible travel schedule? Discover the best time to fly to Boulder from Charlotte 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.

Cheapflights Insights

Everything you need to know about your flight from Charlotte to Boulder

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

Use this chart to determine the optimal time to book a round-trip flight from Charlotte to Boulder. Price data was last updated on December 5, 2025.

Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from Charlotte to Boulder. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Charlotte to Boulder (average of $77). Flying from Charlotte to Boulder in June is currently the most expensive (average of $165). 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 CLT to BD9?

Find hourly flight availability from Charlotte 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 9, 2025.

It’s typically best to fly out from Charlotte to Boulder in the evening. Doing so could potentially save you 42% on the flight price compared to flying in the morning, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Charlotte to Boulder. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Charlotte to Boulder flight should consider departing on Friday evenings 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.

Weekly flight availability from Charlotte to Boulder

Explore weekly flight availability from Charlotte 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 December 9, 2025.

The most flights from CLT to BD9 are scheduled on a Friday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).

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 9, 2025.
Read reviews from past customers who have flown Southwest, Delta, and United Airlines from Charlotte to Boulder. 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
8.0
Very good
4,254 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
8.0
Very good
4,254 reviews
Southwest
8.0
Very good
4,254 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Delta
7.9
Good
8,011 reviews
Southwest
8.0
Very good
4,254 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,089 reviews
Southwest
8.0
Very good
4,254 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,045 reviews
Southwest
8.0
Very good
4,254 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Frontier
5.8
Fair
3,085 reviews
Southwest
8.0
Very good
4,254 reviews

Entertainment

7.5

Crew

8.6

Comfort

8.0

Overall

8.0

Food

7.0

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Charlotte 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 Charlotte to Boulder?

    Charlotte Douglas (CLT), located 5.7 mi from the city center, is the airport you fly out of when you book flights from Charlotte to Boulder. 6 airlines have flights from Douglas to Boulder on a regular basis. Booking flights from Charlotte Douglas to Boulder should not be difficult; the airport handles an average of 6 outbound flights to Boulder per day.

  • How popular is this Charlotte to Boulder flight route?

    Flights from Charlotte Douglas to Boulder have been viewed 113 times in the past calendar month.

  • How long is the flight from Charlotte to Boulder?

    There are many flights that can get you from Charlotte to Boulder in 3h 55m. Fly via United Airlines or Southwest to get the fastest option. There are 1334 mi between Charlotte and Boulder. Generally, flights for this route are nonstop.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $58. Users have also found prices from $89 and $89 on Southwest and American Airlines, respectively.

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

    No one likes to see their flight delayed. When booking a flight from Charlotte to Boulder consider choosing United Airlines (90%), American Airlines (88%) or Frontier (78%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Charlotte to Boulder?

    Looking for the cheapest flight from Charlotte to Boulder? While on average our users pay $653, our data indicates the cheapest price to be $72. The most popular route (Charlotte Douglas - Denver Intl), is priced around $133.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Charlotte 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 Charlotte to Boulder?

    Currently, January is the cheapest month in which you can book a flight from Charlotte to Boulder (average of $77). Flying from Charlotte to Boulder in June is currently the most expensive (average of $165). 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.

See more FAQs

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Top 6 airlines flying from Charlotte to Boulder

Discover the top 6 airlines that operate flights from Charlotte 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 9, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$96Average$203FlexibilityNo cancel feeOn-time62%
DeltaCheapest$118Average$354FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$152Average$305FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$163Average$388FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$177Average$348FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$179Average$381FlexibilityNo cancel feeOn-time63%

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