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R12 270+ Cheap flights to Boulder

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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
Aug 26 — Sep 21
1 adult
1 adult, Economy, 0 bags

Flights to Boulder in 2026

Enter your travel dates to find the best prices.

Cheapest flights to Boulder
Explore the most affordable flight options available to Boulder. Find the lowest fares based on data from user searches, with prices last updated on 27 July 2026.

Wed 9/920:15
JNB
-
DEN
2 stops35h 32m
Virgin Atlantic
Wed 16/912:10
DEN
-
JNB
1 stop23h 30m
Virgin Atlantic
Deal found 26/7R16 556
Thu 23/722:00
JNB
-
DEN
1 stop26h 58m
United Airlines
Thu 6/823:59
DEN
-
JNB
1 stop34h 31m
United Airlines
Deal found 22/7R16 859
Fri 21/815:05
JNB
-
DEN
2 stops27h 04m
United Airlines
Sat 29/813:42
DEN
-
JNB
1 stop20h 48m
United Airlines
Deal found 27/7R17 884
Wed 9/923:15
JNB
-
DEN
2 stops28h 32m
KLM
Wed 16/96:35
DEN
-
JNB
2 stops30h 45m
KLM
Deal found 26/7R18 052
Sun 6/923:15
JNB
-
DEN
2 stops32h 19m
Delta
Sun 13/96:30
DEN
-
JNB
2 stops29h 10m
Delta
Deal found 23/7R18 489
Thu 23/723:15
JNB
-
DEN
2 stops32h 12m
Delta
Thu 6/86:40
DEN
-
JNB
2 stops30h 40m
Delta
Deal found 22/7R19 565
Wed 9/922:00
JNB
-
DEN
1 stop31h 11m
United Airlines
Wed 16/97:40
DEN
-
JNB
1 stop26h 50m
United Airlines
Deal found 26/7R23 397
Fri 21/819:25
JNB
-
DEN
1 stop29h 05m
Multiple Airlines
Fri 28/818:40
DEN
-
JNB
1 stop28h 20m
Multiple Airlines
Deal found 27/7R25 666
Sat 22/822:00
JNB
-
DEN
1 stop31h 11m
United Airlines
Sat 29/87:40
DEN
-
JNB
1 stop26h 50m
United Airlines
Deal found 27/7R25 817
Fri 21/819:25
JNB
-
DEN
1 stop29h 05m
British Airways
Sat 29/818:40
DEN
-
JNB
1 stop30h 45m
British Airways
Deal found 27/7R26 204
Sun 6/914:05
JNB
-
DEN
2 stops40h 07m
Qatar Airways
Tue 22/1223:28
DEN
-
JNB
2 stops55h 07m
Qatar Airways
Deal found 26/7R29 112
Sun 6/923:15
JNB
-
DEN
2 stops32h 19m
Delta
Tue 22/126:45
DEN
-
JNB
2 stops30h 15m
Delta
Deal found 25/7R29 986

Find flight deals to Boulder

Find the latest flights to Boulder in 2026, with up-to-date prices and availability. In the last 7 days, Cheapflights users made a total of 594 507 searches and data was last updated on 27 July 2026.

Return from

R16 556

One-way from

R12 270

Popular in

March

Cheapest in

February

Average price

R21 077
Virgin Atlantic
  • Virgin Atlantic
  • 9/9-16/9
  • 3 total stops
  • 59h 02m total
  • Johannesburg to Denver
Search Deals
Qatar Airways
  • Qatar Airways
  • 2/10
  • 2 total stops
  • 32h 13m total
  • Johannesburg to Boulder
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (R1 379 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (R427 potential savings vs. average return price).
Search Deals
Average for return flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Locate flights to Boulder that fit your budget, with regularly updated fares and availability. In the last 7 days, Cheapflights users made a total of 594 507 searches and data was last updated on 27 July 2026.
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

Route

Depart

Return

Price

Cheapest return flight
Fastest return journey

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 21/8

15:05-10:09

2 stops27h 04m

Denver Intl

Sat 29/8

13:42-18:30

1 stop20h 48m

R17 884

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 21/8

15:05-10:09

2 stops27h 04m

Denver Intl

Fri 28/8

23:59-18:30

1 stop34h 31m

R17 884

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 22/8

15:05-16:53

2 stops33h 48m

Denver Intl

Sat 29/8

13:42-18:30

1 stop20h 48m

R17 884

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Wed 9/9

23:15-19:47

2 stops28h 32m

Denver Intl

Wed 16/9

6:35-21:20

2 stops30h 45m

R18 052

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 6/9

23:15-23:34

2 stops32h 19m

Denver Intl

Sun 13/9

6:30-19:40

2 stops29h 10m

R18 489

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 6/9

23:15-23:34

2 stops32h 19m

Denver Intl

Tue 22/12

6:45-22:00

2 stops30h 15m

R29 986

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 6/9

12:10-20:15

2 stops40h 05m

Denver Intl

Tue 22/12

23:59-0:25

2 stops39h 26m

R30 053

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 6/9

18:50-15:40

1 stop28h 50m

Denver Intl

Tue 22/12

8:05-22:00

2 stops28h 55m

R30 557
Cheapest one-way

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 2/10

14:05-14:18

2 stops32h 13m

R12 270

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 2/10

18:00-18:25

1 stop32h 25m

R13 850

Flights are sorted by cheapest return flights first.

Deals found on 23/7

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Best time to book a flight to Boulder

Have a flexible travel schedule? Discover the best time to fly to Boulder with our price prediction graph.
Estimated return 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 to Boulder

How long is the flight to Boulder?

On average, a flight from Johannesburg to Boulder takes 40 hours 7 minutes. Flights to Boulder from other popular cities in South Africa will vary in length. Below are a few examples of popular routes and their flight times.

What are the most popular airlines that fly to Boulder?

The most popular airlines flying from Johannesburg to Boulder are United Airlines, British Airways and American Airlines.

United Airlines
United Airlines
From R15 828
British Airways
British Airways
From R16 732
KLM
KLM
From R16 259
Turkish Airlines
Turkish Airlines
From R15 495

What are the cheapest airlines that fly to Boulder?

The cheapest airlines flying from Johannesburg to Boulder are Virgin Atlantic, American Airlines and Turkish Airlines.

Rainfall in Boulder by month

Plan your trip to Boulder by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boulder ranges from 13.0 - 58.0 mm per month. May is typically the wettest month, when rainfall can reach 58.0 mm. January is typically the driest time to visit Boulder when rainfall is around 13.0 mm.

Temperature in Boulder by month

Plan your trip to Boulder by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boulder, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 23.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around -1.0 C).

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 27 July 2026.
See what other customers who have flown with KLM,Virgin Atlantic, andUnited Airlines to the United States have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7,8
Good
1 550 reviews
Check prices

Entertainment

7,2

Comfort

7,7

Crew

8,4

Overall

7,8

Boarding

7,8

Food

7,3

Reviews

1 / 20
4,0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
KLM
7,8
Good
1 550 reviews
KLM
7,8
Good
1 550 reviews
Check prices

Entertainment

7,2

Comfort

7,7

Crew

8,4

Overall

7,8

Boarding

7,8

Food

7,3

Reviews

1 / 20
4,0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
Virgin Atlantic
7,5
Good
695 reviews
KLM
7,8
Good
1 550 reviews
Check prices

Entertainment

7,2

Comfort

7,7

Crew

8,4

Overall

7,8

Boarding

7,8

Food

7,3

Reviews

1 / 20
4,0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
United Airlines
7,4
Good
10 042 reviews
KLM
7,8
Good
1 550 reviews
Check prices

Entertainment

7,2

Comfort

7,7

Crew

8,4

Overall

7,8

Boarding

7,8

Food

7,3

Reviews

1 / 20
4,0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
American Airlines
7,1
Good
11 837 reviews
KLM
7,8
Good
1 550 reviews
Check prices

Entertainment

7,2

Comfort

7,7

Crew

8,4

Overall

7,8

Boarding

7,8

Food

7,3

Reviews

1 / 20
4,0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.
British Airways
6,7
Okay
8 130 reviews
KLM
7,8
Good
1 550 reviews
Check prices

Entertainment

7,2

Comfort

7,7

Crew

8,4

Overall

7,8

Boarding

7,8

Food

7,3

Reviews

1 / 20
4,0
Okay

Subhash,Jul 2026

CDG - ATL

The priority tag for bags were taken out. 1 bag is missing. Food was worst for AVML. The food was dry and burnt.

FAQs about flying to Boulder

  • Can I find cheaper flights to Boulder if I am willing to have stopovers?

    Yes, flights with stopovers are often cheaper than direct flights. Keep an eye out for flight deals to Boulder on Cheapflights that require 1 or 2 stops for potential cost savings.

  • What is the best airline to fly to Boulder?

    Based on reviews from Cheapflights users, Virgin Atlantic is rated the highest out of the airlines that fly to Boulder.

  • How much is a return flight to Boulder?

    A return flight to Boulder will typically cost around R3 212, however they can be found for as little as R3 212.

  • Where does the fastest flight to Boulder depart from?

    For those looking to save time traveling to Boulder, Cape Town Intl offers the quickest one-way flight (24 hours 45 minutes).

  • Does Denver Intl have car hire?

    Yes. Those touching down at Denver Intl can take advantage of the car hire services offered upon their arrival.

  • Are there hotels close to Denver Intl?

    Yes. Denver Intl has hotels nearby for those requiring accommodations. The Westin Denver International Airport is the closest property to Denver Intl (0,0 km away from Denver Intl).

See more FAQs

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