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R13 325+ 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 1/4. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
Mar 31 — Apr 71
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 26 March 2025.

Return from

R17 390

One-way from

R13 325

Popular in

August

Cheapest in

November

Average price

R22 494
Delta
  • Delta
  • 13/4-19/4
  • 3 total stops
  • 65h 02m total
  • Johannesburg to Denver
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1/4
  • 1/4
  • 3 total stops
  • 37h 52m total
  • Johannesburg to Boulder
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Highest demand for flights based on searches. 8% potential increase in price (R34 735 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (R6 278 potential savings vs. average return price).
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Average for return flights in March 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 26 March 2025.

Sun 13/423:15JNB - DEN
2 stops30h 17mDelta
Sat 19/40:55DEN - JNB
1 stop34h 45mDelta
Deal found 24/3R17 390
Wed 2/421:15JNB - DEN
1 stop27h 10mMultiple Airlines
Wed 3/1217:30DEN - JNB
1 stop29h 00mMultiple Airlines
Deal found 25/3R17 736
Tue 1/421:15JNB - DEN
1 stop27h 10mBritish Airways
Thu 27/1117:30DEN - JNB
1 stop31h 50mBritish Airways
Deal found 25/3R17 936
Tue 1/41:15JNB - DEN
2 stops50h 45mKenya Airways
Wed 3/1223:59DEN - JNB
2 stops30h 51mKenya Airways
Deal found 25/3R18 939
Sun 13/419:00JNB - DEN
1 stop28h 55mUnited Airlines
Sun 20/414:00DEN - JNB
1 stop19h 45mUnited Airlines
Deal found 24/3R23 387
Sat 10/518:50JNB - DEN
1 stop28h 40mAir France
Sat 24/512:35DEN - JNB
2 stops35h 50mAir France
Deal found 24/3R23 642
Fri 4/417:55JNB - DEN
1 stop32h 00mTurkish Airlines
Tue 2/1219:35DEN - JNB
1 stop30h 15mTurkish Airlines
Deal found 25/3R24 900
Fri 4/410:40JNB - DEN
2 stops40h 00mLufthansa
Sun 30/1117:45DEN - JNB
2 stops36h 50mLufthansa
Deal found 25/3R25 228
Mon 12/514:30JNB - DEN
3 stops32h 17mEthiopian Air
Thu 22/513:55DEN - JNB
3 stops30h 00mEthiopian Air
Deal found 25/3R35 089
Wed 9/413:45JNB - DEN
3 stops36h 35mSingapore Airlines
Tue 22/419:35DEN - JNB
2 stops63h 00mSingapore Airlines
Deal found 25/3R50 547

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 26 March 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

Sun 13/4

23:15-21:32

2 stops30h 17m

Denver Intl

Sun 20/4

6:20-19:40

2 stops29h 20m

R17 390

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Wed 9/4

19:25-16:25

1 stop29h 00m

Denver Intl

Tue 22/4

18:35-9:25

1 stop30h 50m

R18 629

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Mon 12/5

18:50-15:30

1 stop28h 40m

Denver Intl

Thu 22/5

17:40-8:30

1 stop30h 50m

R18 939

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Tue 6/5

1:15-20:39

2 stops51h 24m

Denver Intl

Thu 22/5

12:31-0:15

2 stops51h 44m

R19 012

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 4/4

17:00-20:00

2 stops35h 00m

Denver Intl

Fri 5/12

23:59-10:55

2 stops49h 56m

R20 142

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sun 13/4

19:00-15:55

1 stop28h 55m

Denver Intl

Sun 20/4

14:00-17:45

1 stop19h 45m

R23 387

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 4/4

17:55-17:55

1 stop32h 00m

Denver Intl

Thu 4/12

19:35-10:50

1 stop30h 15m

R24 900

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Fri 4/4

10:40-18:40

2 stops40h 00m

Denver Intl

Sun 30/11

17:45-15:35

2 stops36h 50m

R25 228

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Mon 12/5

14:30-14:47

3 stops32h 17m

Denver Intl

Thu 22/5

13:55-3:55

3 stops30h 00m

R35 089

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Wed 9/4

13:45-18:20

3 stops36h 35m

Denver Intl

Tue 22/4

19:35-18:35

2 stops63h 00m

R50 547

Flights are sorted by cheapest return flights first.

Deals found on 25/3

Showing 1-10 of 16 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 21 March 2025.

To ensure you get the cheapest price possible for a flight to Boulder, you should look to book at least 62 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 27 hours 10 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 R916

United Airlines

United Airlines

From R924

Air France

Air France

From R920

Kenya Airways

Kenya Airways

From R1 017

What are the cheapest airlines that fly to Boulder?

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

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 26 March 2025.
Read through reviews of airlines servicing Boulder, such as Singapore Airlines, Delta and Qatar Airways. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Singapore Airlines
8,1
Very Good
1 284 reviews
Check prices

Food

7,7

Boarding

8,2

Overall

8,1

Entertainment

8,0

Crew

8,6

Comfort

7,9

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
1 284 reviews
Singapore Airlines
8,1
Very Good
1 284 reviews
Check prices

Food

7,7

Boarding

8,2

Overall

8,1

Entertainment

8,0

Crew

8,6

Comfort

7,9

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
7 891 reviews
Singapore Airlines
8,1
Very Good
1 284 reviews
Check prices

Food

7,7

Boarding

8,2

Overall

8,1

Entertainment

8,0

Crew

8,6

Comfort

7,9

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
3 539 reviews
Singapore Airlines
8,1
Very Good
1 284 reviews
Check prices

Food

7,7

Boarding

8,2

Overall

8,1

Entertainment

8,0

Crew

8,6

Comfort

7,9

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.
Air France
7,4
Good
1 423 reviews
Singapore Airlines
8,1
Very Good
1 284 reviews
Check prices

Food

7,7

Boarding

8,2

Overall

8,1

Entertainment

8,0

Crew

8,6

Comfort

7,9

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.
United Airlines
7,4
Good
8 608 reviews
Singapore Airlines
8,1
Very Good
1 284 reviews
Check prices

Food

7,7

Boarding

8,2

Overall

8,1

Entertainment

8,0

Crew

8,6

Comfort

7,9

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.

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, 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 (27 hours 10 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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