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$54+ 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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
ATL — DEN
Jun 4 — Jun 111
Thu 6/4
Thu 6/11
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 41 days in advance, depart on a Wednesday or Friday 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 May 5, 2026.

This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Fri 5/2210:50 pm
ATL
-
DEN
1 stop17h 42m
Frontier
Mon 5/2511:54 pm
DEN
-
ATL
Nonstop3h 04m
Frontier
Deal found 4/30$129
This Kiwi.com deal was found by Cheapflights users on 4/30. 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.
Sat 5/236:35 am
ATL
-
DEN
1 stop9h 57m
Frontier
Wed 5/276:03 am
DEN
-
ATL
1 stop6h 11m
Frontier
Deal found 4/30$130
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/287:35 am
ATL
-
DEN
Nonstop3h 30m
Frontier
Mon 6/16:03 am
DEN
-
ATL
1 stop6h 11m
Frontier
Deal found 4/30$131
This Kiwi.com deal was found by Cheapflights users on 5/4. 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 8/117:00 am
ATL
-
DEN
1 stop8h 34m
Frontier
Tue 8/186:30 am
DEN
-
ATL
Nonstop3h 08m
Frontier
Deal found 5/4$133
This Frontier deal was found by Cheapflights users on 4/30. 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.
Thu 5/217:35 am
ATL
-
DEN
Nonstop3h 30m
Frontier
Sun 5/246:00 am
DEN
-
ATL
1 stop12h 11m
Frontier
Deal found 4/30$134
This Kiwi.com deal was found by Cheapflights users on 5/3. 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 5/266:15 pm
ATL
-
DEN
1 stop7h 29m
Frontier
Thu 5/2811:54 pm
DEN
-
ATL
Nonstop3h 04m
Frontier
Deal found 5/3$135
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/217:35 am
ATL
-
DEN
Nonstop3h 30m
Frontier
Wed 5/276:30 am
DEN
-
ATL
1 stop9h 06m
Frontier
Deal found 4/30$136
This Super.com deal was found by Cheapflights users on 5/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/198:40 pm
ATL
-
DEN
Nonstop3h 44m
Frontier
Tue 5/2610:00 am
DEN
-
ATL
Nonstop3h 09m
Frontier
Deal found 5/3$137
This Kiwi.com deal was found by Cheapflights users on 5/1. 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.
Fri 5/2210:50 pm
ATL
-
DEN
1 stop17h 42m
Frontier
Thu 5/286:03 am
DEN
-
ATL
1 stop6h 32m
Frontier
Deal found 5/1$138
This Cheapflightsfares deal was found by Cheapflights users on 5/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/2310:06 am
ATL
-
DEN
1 stop13h 44m
Frontier
Sat 5/3011:54 pm
DEN
-
ATL
Nonstop3h 04m
Frontier
Deal found 5/2$139
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/287:35 am
ATL
-
DEN
Nonstop3h 30m
Frontier
Tue 6/26:30 am
DEN
-
ATL
1 stop13h 02m
Frontier
Deal found 4/30$140

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 May 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$129
(Kiwi.com)

One-way from

$54
(Frontier)

Popular in

December

Cheapest in

January

Average price

$237
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
High demand for flights, 0% potential price rise
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 May 2026
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 May 5, 2026.
Use the filters below to find and compare flights from Atlanta to Boulder that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Sat 5/23

7:06 pm-11:52 pm

1 stop6h 46m

Denver Intl

Tue 5/26

5:48 pm-10:57 pm

Nonstop3h 09m

$240

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Wed 6/3

11:29 am-3:17 pm

1 stop5h 48m

Denver Intl

Wed 6/10

11:59 pm-11:08 am

2 stops9h 09m

$332

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Tue 5/26

7:06 pm-11:53 pm

1 stop6h 47m

Denver Intl

Tue 6/2

11:59 pm-11:08 am

2 stops9h 09m

$332

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Sat 6/13

6:30 am-10:45 am

2 stops6h 15m

Denver Intl

Wed 6/17

5:40 am-1:20 pm

1 stop5h 40m

$355
Quickest round-trip

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Mon 5/18

9:15 pm-10:39 pm

Nonstop3h 24m

Denver Intl

Mon 5/18

12:56 am-5:58 am

Nonstop3h 02m

$382

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Sat 6/20

1:30 pm-7:40 pm

2 stops8h 10m

Denver Intl

Wed 6/24

12:20 pm-9:00 pm

2 stops6h 40m

$453

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Mon 5/18

8:45 pm-11:45 pm

1 stop5h 00m

Denver Intl

Wed 5/20

5:55 pm-11:00 pm

Nonstop3h 05m

$457

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Mon 7/27

3:40 pm-8:00 pm

1 stop6h 20m

Denver Intl

Fri 7/31

12:55 pm-8:45 pm

2 stops5h 50m

$464

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Fri 5/22

8:45 pm-11:45 pm

1 stop5h 00m

Denver Intl

Tue 5/26

1:15 pm-9:45 pm

2 stops6h 30m

$468

AtlantaDenver

ATL - DEN

ATLDEN

Atlanta Hartsfield-Jackson

Fri 6/5

7:10 am-11:00 am

2 stops5h 50m

Denver Intl

Sun 6/7

5:00 am-1:10 pm

1 stop6h 10m

$480

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/4

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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

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 May 5, 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 22% 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 May 2, 2026.

Travelers seeking maximum savings on their Atlanta to Boulder flight should consider departing on Saturday 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 May 5, 2026.

The most flights from ATL to BD9 are scheduled on a Monday (41 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (8 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 May 5, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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
4,305 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
7.9
Good
4,305 reviews
Southwest
7.9
Good
4,305 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,459 reviews
Southwest
7.9
Good
4,305 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,683 reviews
Southwest
7.9
Good
4,305 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,667 reviews
Southwest
7.9
Good
4,305 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Frontier
5.6
Fair
2,965 reviews
Southwest
7.9
Good
4,305 reviews

Food

7.0

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 30 flights from Hartsfield-Jackson to Boulder per day from 6 different airlines.

  • How popular is this Atlanta to Boulder flight route?

    Flights from Atlanta Hartsfield-Jackson to Boulder have been viewed 328 times in the past calendar month.

  • How long is the flight from Atlanta to Boulder?

    For as low as $382, United Airlines can have you in Boulder from Atlanta in 3h 24m. The distance from Atlanta to Boulder is about 1196 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 ($44), Southwest ($78), and United Airlines ($79).

  • 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: Volaris (93%), Air Canada (85%), United Airlines (85%).

  • What are the cheapest flights from Atlanta to Boulder?

    On average you can expect to pay $678 for a flight from Atlanta to Boulder. The cheapest flight overall is $70 while the most popular route, (Atlanta Hartsfield-Jackson - Denver Intl) is currently priced at $152.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Atlanta to Boulder

Discover the top 6 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 May 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$68Average$208FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$106Average$336FlexibilityNo cancel feeOn-time71%
JetBlueCheapest$120Average$206FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$123Average$380FlexibilityNo cancel feeOn-time69%
DeltaCheapest$126Average$378FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$156Average$346FlexibilityNo cancel feeOn-time63%

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