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$49+ Cheap flights from Atlanta (ATL) 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 1/31. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — DEN
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Atlanta Hartsfield-Jackson to Boulder are usually found in January or September, booked 37 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Atlanta to Boulder

Cheapest flights from Atlanta to Boulder
Explore the most affordable flight options available from Atlanta to Boulder. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/10. 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 12/309:10 pmATL - DEN
1 stop13h 46mFrontier
Tue 1/66:00 amDEN - ATL
Nonstop3h 07mFrontier
Deal found 12/10$120
This Frontier deal was found by Cheapflights users on 12/10. 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 12/317:59 pmATL - DEN
1 stop9h 59mFrontier
Wed 1/76:00 amDEN - ATL
Nonstop3h 07mFrontier
Deal found 12/10$126
This Frontier deal was found by Cheapflights users on 12/11. 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 12/317:59 pmATL - DEN
1 stop9h 59mFrontier
Tue 1/66:33 pmDEN - ATL
1 stop10h 34mFrontier
Deal found 12/11$131
This Frontier deal was found by Cheapflights users on 12/10. 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 12/239:15 pmATL - DEN
1 stop12h 34mFrontier
Thu 1/86:00 amDEN - ATL
Nonstop3h 07mFrontier
Deal found 12/10$135
This Frontier deal was found by Cheapflights users on 12/10. 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 12/239:15 pmATL - DEN
1 stop12h 34mFrontier
Tue 1/66:33 pmDEN - ATL
1 stop10h 34mFrontier
Deal found 12/10$140
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/244:30 pmATL - DEN
1 stop29h 34mFrontier
Thu 1/86:00 amDEN - ATL
Nonstop3h 07mFrontier
Deal found 12/10$148
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/244:30 pmATL - DEN
1 stop29h 34mFrontier
Wed 1/710:42 amDEN - ATL
1 stop8h 58mFrontier
Deal found 12/10$153
This Kiwi.com deal was found by Cheapflights users on 12/10. 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 12/244:30 pmATL - DEN
1 stop29h 34mFrontier
Tue 1/66:33 pmDEN - ATL
1 stop10h 34mFrontier
Deal found 12/10$159
This Frontier deal was found by Cheapflights users on 12/10. 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 12/2010:50 pmATL - DEN
1 stop12h 06mFrontier
Thu 1/86:00 amDEN - ATL
Nonstop3h 07mFrontier
Deal found 12/10$160

Find flight deals from Atlanta to Boulder

Keep the following information in mind while searching for Atlanta to Boulder flight deals. Data was last updated December 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$82
(Frontier)

One-way from

$49
(Frontier)

Popular in

December

Cheapest in

January

Average price

$301
Provider with most accurate pricing for Atlanta Hartsfield-Jackson-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Atlanta Hartsfield-Jackson-Denver Intl flights.
Search Deals
From Atlanta Hartsfield-Jackson to Boulder
Search Deals
One-way flight from Atlanta Hartsfield-Jackson to Boulder
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($5 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 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 Atlanta 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 12, 2025.
Use the filters below to find and compare flights from Atlanta to Boulder that are best for you.

Fly from

Atlanta

Fly to

Boulder

Route

Depart

Return

Price

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Thu 2/19

8:00 pm-9:41 pm

Nonstop3h 41m

Denver Intl

Mon 2/23

9:06 pm-9:45 am

1 stop10h 39m

$93

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Fri 2/20

6:00 am-7:39 am

Nonstop3h 39m

Denver Intl

Tue 2/24

11:59 pm-12:22 pm

1 stop10h 23m

$93

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Sat 1/24

8:40 am-10:18 am

Nonstop3h 38m

Denver Intl

Tue 1/27

10:08 am-3:07 pm

Nonstop2h 59m

$157

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Sat 1/24

8:40 am-10:18 am

Nonstop3h 38m

Denver Intl

Wed 1/28

5:35 pm-10:35 pm

Nonstop3h 00m

$157

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Mon 1/12

4:20 pm-5:57 pm

Nonstop3h 37m

Denver Intl

Sat 1/17

5:35 pm-10:35 pm

Nonstop3h 00m

$177

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Fri 1/16

9:31 pm-10:55 pm

Nonstop3h 24m

Denver Intl

Sun 1/25

6:00 am-10:57 am

Nonstop2h 57m

$197

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Thu 1/15

10:46 am-4:41 pm

1 stop7h 55m

Denver Intl

Sun 1/18

12:05 am-5:21 am

Nonstop3h 16m

$204

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Tue 1/6

2:30 pm-3:55 pm

Nonstop3h 25m

Denver Intl

Tue 1/13

2:10 pm-9:30 pm

1 stop5h 20m

$227

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Tue 12/30

10:46 pm-8:48 am

1 stop12h 02m

Denver Intl

Wed 12/31

12:14 am-5:28 am

Nonstop3h 14m

$251

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Tue 12/23

9:15 pm-7:49 am

1 stop12h 34m

Denver Intl

Fri 12/26

8:05 am-9:25 pm

1 stop11h 20m

$267

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 21 results
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Best time to book a flight from Atlanta to Boulder

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

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

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

The price you pay for your flight from Atlanta to Boulder may vary depending on when you book. For the best chance of a lower fare, look to book 37 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, January is the cheapest month in which you can book a flight from Atlanta to Boulder (average of $58). Flying from Atlanta to Boulder in July is currently the most expensive (average of $138). 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 ATL to BD9?

Find hourly flight availability from Atlanta 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 12, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 38% on flights from Atlanta to Boulder by exploring options for tickets in the evening.

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

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

Travelers seeking maximum savings on their Atlanta 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 Atlanta to Boulder

Explore weekly flight availability from Atlanta 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 12, 2025.

The most flights from ATL to BD9 are scheduled on a Thursday (43 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (18 on average).

How much does it cost to fly round-trip from Atlanta 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 December 12, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from Atlanta to Boulder by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,253 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

7.9

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
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

7.9

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
8,008 reviews
Southwest
7.9
Good
4,253 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

7.9

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
9,095 reviews
Southwest
7.9
Good
4,253 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

7.9

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
11,050 reviews
Southwest
7.9
Good
4,253 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

7.9

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
3,084 reviews
Southwest
7.9
Good
4,253 reviews

Crew

8.6

Food

7.0

Comfort

8.0

Entertainment

7.5

Boarding

8.1

Overall

7.9

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 Atlanta 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 Atlanta to Boulder?

    If you book a flight to Boulder from Atlanta, you will be flying from Hartsfield-Jackson, which is the city’s only airport. Atlanta Hartsfield-Jackson (ATL) is located 8.2 mi from the center of Atlanta. There are 33 flights from Hartsfield-Jackson to Boulder per day from 5 different airlines.

  • How popular is this Atlanta to Boulder flight route?

    Flights from Atlanta Hartsfield-Jackson to Boulder have been viewed 307 times in the past calendar month.

  • How long is the flight from Atlanta to Boulder?

    For as low as $157, Frontier can have you in Boulder from Atlanta in 3h 38m. The distance from Atlanta to Boulder is about 1196 mi. Generally, flights for this route are nonstop.

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

    The cheapest airlines for a one-way flight from Atlanta to Boulder are Frontier ($45), Southwest ($78), and United Airlines ($81).

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Atlanta to Boulder on time: United Airlines (91%), Air Canada (90%), Aeromexico (86%).

  • What are the cheapest flights from Atlanta to Boulder?

    On average you can expect to pay $663 for a flight from Atlanta to Boulder. The cheapest flight overall is $42 while the most popular route, (Atlanta Hartsfield-Jackson - Denver Intl) is currently priced at $94.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Atlanta to Boulder (average of $58). Flying from Atlanta to Boulder in July is currently the most expensive (average of $138). 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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Alternative routes for Atlanta to Boulder

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Atlanta to Boulder

Discover the top 5 airlines that operate flights from Atlanta 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$71Average$202FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$133Average$385FlexibilityNo cancel feeOn-time69%
DeltaCheapest$145Average$355FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$157Average$346FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$171Average$329FlexibilityNo cancel feeOn-time71%

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