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R11 898+ 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 6/10. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
Oct 13 — Oct 201
1 adult
1 adult, Economy

Flights to Boulder in 2025

Find the latest flights to Boulder in 2025, 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 13 September 2025.

Return from

R16 205

One-way from

R11 898

Popular in

June

Cheapest in

January

Average price

R18 723
Turkish Airlines
  • Turkish Airlines
  • 7/11-25/11
  • 2 total stops
  • 62h 00m total
  • Johannesburg to Denver
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6/10
  • 6/10
  • 3 total stops
  • 36h 46m total
  • Johannesburg to Boulder
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Highest demand for flights based on searches. 6% potential increase in price (R24 239 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (R6 191 potential savings vs. average return price).
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Average for return flights in September 2025
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Find flight deals to Boulder

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 13 September 2025.

Fri 7/1119:05JNB - DEN
1 stop31h 30mTurkish Airlines
Tue 25/1119:20DEN - JNB
1 stop30h 30mTurkish Airlines
Deal found 13/9R16 205
Sun 2/1120:15JNB - DEN
2 stops47h 08mMultiple Airlines
Sun 16/118:45DEN - JNB
2 stops37h 20mMultiple Airlines
Deal found 11/9R16 830
Fri 28/1122:00JNB - DEN
2 stops30h 29mUnited Airlines
Thu 8/111:49DEN - JNB
1 stop21h 46mUnited Airlines
Deal found 12/9R16 952
Fri 28/1119:05JNB - DEN
1 stop31h 30mTurkish Airlines
Thu 8/119:20DEN - JNB
1 stop30h 30mTurkish Airlines
Deal found 12/9R16 969
Sat 13/921:20JNB - DEN
2 stops26h 48mUnited Airlines
Sat 20/98:02DEN - JNB
2 stops25h 43mUnited Airlines
Deal found 13/9R16 987
Wed 26/1122:00JNB - DEN
2 stops44h 59mDelta
Sun 11/17:00DEN - JNB
2 stops40h 40mDelta
Deal found 11/9R17 039
Mon 24/1122:00JNB - DEN
2 stops34h 35mDelta
Sun 11/112:20DEN - JNB
2 stops35h 20mDelta
Deal found 12/9R17 091
Tue 25/1122:00JNB - DEN
2 stops31h 43mDelta
Tue 13/111:00DEN - JNB
2 stops36h 40mDelta
Deal found 12/9R17 178
Tue 25/1122:00JNB - DEN
2 stops31h 43mDelta
Mon 12/111:00DEN - JNB
2 stops36h 40mDelta
Deal found 11/9R17 195

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 13 September 2025.
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

Johannesburg

Route

Depart

Return

Price

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 29/11

22:00-19:29

2 stops30h 29m

Denver Intl

Sat 10/1

12:48-18:35

1 stop20h 47m

R16 952

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 28/11

22:00-14:50

2 stops25h 50m

Denver Intl

Wed 7/1

11:49-18:35

1 stop21h 46m

R16 952

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 29/11

22:00-19:29

2 stops30h 29m

Denver Intl

Thu 8/1

12:48-18:35

1 stop20h 47m

R16 952

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 30/11

22:00-19:29

2 stops30h 29m

Denver Intl

Fri 9/1

12:48-18:35

1 stop20h 47m

R16 952

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 29/11

22:00-19:29

2 stops30h 29m

Denver Intl

Wed 7/1

12:48-18:35

1 stop20h 47m

R16 952

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 30/11

22:00-12:09

1 stop23h 09m

Denver Intl

Wed 7/1

11:49-18:35

1 stop21h 46m

R16 952

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Mon 24/11

22:00-20:43

2 stops31h 43m

Denver Intl

Tue 13/1

10:30-8:40

2 stops37h 10m

R17 091

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 30/11

22:00-12:09

1 stop23h 09m

Denver Intl

Sun 11/1

15:55-9:30

1 stop32h 35m

R17 351

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Thu 13/11

22:00-22:22

2 stops33h 22m

Denver Intl

Mon 17/11

12:26-7:35

2 stops34h 09m

R17 942

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 28/11

22:00-20:43

2 stops31h 43m

Denver Intl

Tue 13/1

10:30-8:40

2 stops37h 10m

R18 011

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 15 results
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

When is the best time to book a flight to Boulder?

Use this chart to determine the optimal time to book a return flight from Johannesburg to Boulder. Price data was last updated on 12 September 2025.

To ensure you get the cheapest price possible for a flight to Boulder, you should look to book at least 14 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

How long is the flight to Boulder?

On average, a flight from Johannesburg to Boulder takes 28 hours 40 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 British Airways, United Airlines and Virgin Atlantic.

United Airlines
United Airlines
From R913
British Airways
British Airways
From R977
Virgin Atlantic
Virgin Atlantic
From R939
Turkish Airlines
Turkish Airlines
From R910

What are the cheapest airlines that fly to Boulder?

The cheapest airlines flying from Johannesburg to Boulder are Turkish Airlines, Lufthansa and United 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 13 September 2025.
See what other customers who have flown with Air France, United Airlines, andVirgin Atlantic 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.
Air France
7,4
Good
1 468 reviews
Check prices

Overall

7,4

Boarding

7,4

Comfort

7,4

Food

7,0

Crew

8,2

Entertainment

6,9

Reviews

1 / 20
10,0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Air France
7,4
Good
1 468 reviews
Air France
7,4
Good
1 468 reviews
Check prices

Overall

7,4

Boarding

7,4

Comfort

7,4

Food

7,0

Crew

8,2

Entertainment

6,9

Reviews

1 / 20
10,0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
United Airlines
7,4
Good
8 934 reviews
Air France
7,4
Good
1 468 reviews
Check prices

Overall

7,4

Boarding

7,4

Comfort

7,4

Food

7,0

Crew

8,2

Entertainment

6,9

Reviews

1 / 20
10,0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Virgin Atlantic
7,4
Good
664 reviews
Air France
7,4
Good
1 468 reviews
Check prices

Overall

7,4

Boarding

7,4

Comfort

7,4

Food

7,0

Crew

8,2

Entertainment

6,9

Reviews

1 / 20
10,0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Lufthansa
6,8
Okay
7 409 reviews
Air France
7,4
Good
1 468 reviews
Check prices

Overall

7,4

Boarding

7,4

Comfort

7,4

Food

7,0

Crew

8,2

Entertainment

6,9

Reviews

1 / 20
10,0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
British Airways
6,7
Okay
7 361 reviews
Air France
7,4
Good
1 468 reviews
Check prices

Overall

7,4

Boarding

7,4

Comfort

7,4

Food

7,0

Crew

8,2

Entertainment

6,9

Reviews

1 / 20
10,0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.

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 R149, however they can be found for as little as R149.

  • 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 (26 hours 20 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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