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R12 480+ 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 13/3. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
Feb 26 — Mar 51
1 adult

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 21 February 2025.

Return from

R17 642

One-way from

R12 480

Popular in

August

Cheapest in

February

Average price

R18 048
KLM
  • KLM
  • 7/5-22/5
  • 3 total stops
  • 72h 20m total
  • Johannesburg to Denver
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Qatar Airways
  • Qatar Airways
  • 13/3
  • 2 total stops
  • 33h 48m total
  • Johannesburg to Boulder
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (R34 272 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (R6 524 potential savings vs. average return price).
Search Deals
Average for return flights in February 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 21 February 2025.

Sat 1/1121:55JNB - DEN
1 stop31h 27mDelta
Wed 12/116:30DEN - JNB
2 stops30h 30mDelta
Deal found 20/2R17 402
Wed 7/518:50JNB - DEN
1 stop28h 40mMultiple Airlines
Thu 22/517:40DEN - JNB
2 stops43h 40mMultiple Airlines
Deal found 19/2R17 642
Wed 7/518:50JNB - DEN
1 stop28h 40mAir France
Thu 22/517:40DEN - JNB
1 stop30h 50mAir France
Deal found 19/2R18 435
Sat 1/1117:00JNB - DEN
2 stops38h 56mKenya Airways
Wed 12/1123:59DEN - JNB
2 stops30h 51mKenya Airways
Deal found 20/2R19 098
Sat 10/521:15JNB - DEN
1 stop27h 10mBritish Airways
Sat 24/513:45DEN - JNB
2 stops33h 15mBritish Airways
Deal found 19/2R19 836
Sun 13/418:55JNB - DEN
2 stops36h 45mVirgin Atlantic
Sun 20/418:15DEN - JNB
2 stops32h 00mVirgin Atlantic
Deal found 19/2R21 145
Sun 6/419:35JNB - DEN
2 stops28h 55mSWISS
Sun 13/420:15DEN - JNB
2 stops53h 05mSWISS
Deal found 20/2R21 237
Tue 1/721:15JNB - DEN
2 stops30h 17mAmerican Airlines
Tue 15/717:30DEN - JNB
2 stops31h 55mAmerican Airlines
Deal found 20/2R21 900
Sun 6/419:00JNB - DEN
1 stop28h 55mUnited Airlines
Sun 13/48:05DEN - JNB
2 stops25h 40mUnited Airlines
Deal found 20/2R23 246
Sat 10/517:50JNB - DEN
1 stop32h 05mTurkish Airlines
Sat 24/519:50DEN - JNB
1 stop30h 45mTurkish Airlines
Deal found 19/2R27 265
Sat 22/323:00JNB - DEN
3 stops47h 47mEthiopian Air
Wed 11/613:55DEN - JNB
3 stops30h 00mEthiopian Air
Deal found 20/2R31 966
Sun 13/413:45JNB - DEN
3 stops36h 35mSingapore Airlines
Sun 20/419:35DEN - JNB
2 stops39h 00mSingapore Airlines
Deal found 21/2R50 419

Find flights to Boulder within your budget

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 21 February 2025.

Fly from

Johannesburg

Route

Depart

Return

Price

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Wed 7/5

18:50-15:30

1 stop28h 40m

Denver Intl

Thu 22/5

17:40-21:20

2 stops43h 40m

R17 642

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Wed 7/5

18:50-15:30

1 stop28h 40m

Denver Intl

Thu 22/5

17:40-8:30

1 stop30h 50m

R18 435

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 10/5

21:15-16:25

1 stop27h 10m

Denver Intl

Sat 24/5

13:45-7:00

2 stops33h 15m

R19 836

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 13/4

18:55-23:40

2 stops36h 45m

Denver Intl

Sun 20/4

18:15-10:15

2 stops32h 00m

R21 145

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 6/4

19:35-16:30

2 stops28h 55m

Denver Intl

Sun 13/4

20:15-9:20

2 stops53h 05m

R21 237

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Tue 1/7

21:15-19:32

2 stops30h 17m

Denver Intl

Tue 15/7

17:30-9:25

2 stops31h 55m

R21 900

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 9/5

1:15-19:44

2 stops50h 29m

Denver Intl

Sat 24/5

6:20-15:50

2 stops25h 30m

R22 767

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 6/4

19:00-15:55

1 stop28h 55m

Denver Intl

Sun 13/4

11:50-17:45

1 stop21h 55m

R23 246

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Tue 1/7

23:15-23:09

2 stops31h 54m

Denver Intl

Mon 14/7

0:59-19:40

1 stop34h 41m

R24 703

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 10/5

17:50-17:55

1 stop32h 05m

Denver Intl

Sat 24/5

19:50-10:35

1 stop30h 45m

R27 265

Flights are sorted by cheapest return flights first.

Deals found on 21/2

Showing 1-10 of 17 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.

Travel insights for flights to Boulder

Get recent, data-driven insights about flights to Boulder including ideal travel times, pricing trends, and more.

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 14 February 2025.

To ensure you get the cheapest price possible for a flight to Boulder, you should look to book at least 20 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 25 hours 55 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 Air France.

British Airways

British Airways

From R905

United Airlines

United Airlines

From R926

Air France

Air France

From R923

Kenya Airways

Kenya Airways

From R998

What are the cheapest airlines that fly to Boulder?

The cheapest airlines flying from Johannesburg to Boulder are SWISS, KLM and British Airways.

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 21 February 2025.
Read through reviews of airlines servicing Boulder, such as Singapore Airlines, Delta and SWISS. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8,1
Very Good
1 299 reviews
Check prices

Comfort

7,9

Food

7,7

Entertainment

8,0

Overall

8,1

Crew

8,6

Boarding

8,2

Reviews

1 / 20

8,0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

Singapore Airlines
8,1
Very Good
1 299 reviews
Singapore Airlines
8,1
Very Good
1 299 reviews
Check prices

Comfort

7,9

Food

7,7

Entertainment

8,0

Overall

8,1

Crew

8,6

Boarding

8,2

Reviews

1 / 20

8,0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

Delta
8,0
Very Good
8 213 reviews
Singapore Airlines
8,1
Very Good
1 299 reviews
Check prices

Comfort

7,9

Food

7,7

Entertainment

8,0

Overall

8,1

Crew

8,6

Boarding

8,2

Reviews

1 / 20

8,0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

SWISS
7,5
Good
1 568 reviews
Singapore Airlines
8,1
Very Good
1 299 reviews
Check prices

Comfort

7,9

Food

7,7

Entertainment

8,0

Overall

8,1

Crew

8,6

Boarding

8,2

Reviews

1 / 20

8,0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

Virgin Atlantic
7,5
Good
654 reviews
Singapore Airlines
8,1
Very Good
1 299 reviews
Check prices

Comfort

7,9

Food

7,7

Entertainment

8,0

Overall

8,1

Crew

8,6

Boarding

8,2

Reviews

1 / 20

8,0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

Qatar Airways
7,4
Good
3 609 reviews
Singapore Airlines
8,1
Very Good
1 299 reviews
Check prices

Comfort

7,9

Food

7,7

Entertainment

8,0

Overall

8,1

Crew

8,6

Boarding

8,2

Reviews

1 / 20

8,0
Excellent

Anonymous,Dec 2024

NRT - LAX

Crew and in flight experience were great! I felt safe in the plane. Only downside was sitting in economy and the seat/person in front of me who had their seat reclined most of the flight (9 hrs) which made it difficult to eat or be fully comfortable.

  • 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, SWISS 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, Johannesburg offers the quickest one-way flight (25 hours 55 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).

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