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R12 253+ 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 17/3. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
Apr 9 — Apr 161
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 10 March 2026.

Wed 16/921:15
JNB
-
DEN
1 stop27h 15m
British Airways
Wed 4/1114:48
DEN
-
JNB
2 stops31h 47m
British Airways
Deal found 7/3R16 016
Tue 21/420:25
JNB
-
DEN
2 stops31h 54m
Delta
Mon 11/519:02
DEN
-
JNB
2 stops29h 43m
Delta
Deal found 6/3R16 299
Wed 16/98:45
JNB
-
DEN
1 stop37h 00m
Lufthansa
Wed 4/1110:20
DEN
-
JNB
1 stop23h 15m
Lufthansa
Deal found 7/3R17 148
Tue 10/321:55
JNB
-
DEN
1 stop32h 22m
Delta
Thu 3/126:30
DEN
-
JNB
2 stops44h 40m
Delta
Deal found 9/3R17 297
Tue 10/321:55
JNB
-
DEN
1 stop32h 22m
Delta
Mon 30/1123:59
DEN
-
JNB
2 stops51h 11m
Delta
Deal found 9/3R17 497
Wed 22/48:45
JNB
-
DEN
1 stop37h 35m
Multiple Airlines
Wed 29/418:05
DEN
-
JNB
2 stops52h 35m
Multiple Airlines
Deal found 8/3R17 947
Tue 10/321:55
JNB
-
DEN
1 stop32h 22m
Delta
Sun 29/1123:59
DEN
-
JNB
2 stops51h 11m
Delta
Deal found 9/3R18 080
Sat 4/421:15
JNB
-
DEN
1 stop27h 05m
British Airways
Sat 11/418:30
DEN
-
JNB
1 stop28h 30m
British Airways
Deal found 5/3R18 346
Wed 22/48:45
JNB
-
DEN
1 stop37h 35m
Lufthansa
Wed 29/417:40
DEN
-
JNB
1 stop30h 55m
Lufthansa
Deal found 8/3R18 513
Thu 16/412:10
JNB
-
DEN
2 stops39h 32m
Multiple Airlines
Thu 3/1223:59
DEN
-
JNB
2 stops30h 51m
Multiple Airlines
Deal found 9/3R18 896

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 10 March 2026.

Return from

R16 299

One-way from

R12 253

Popular in

June

Cheapest in

February

Average price

R21 093
Delta
  • Delta
  • 21/4-11/5
  • 4 total stops
  • 61h 37m total
  • Johannesburg to Denver
Search Deals
Qatar Airways
  • Qatar Airways
  • 17/3
  • 2 total stops
  • 34h 29m total
  • Johannesburg to Boulder
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (R1 285 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (R327 potential savings vs. average return price).
Search Deals
Average for return flights in March 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 10 March 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

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Tue 21/4

20:25-20:19

2 stops31h 54m

Denver Intl

Mon 11/5

19:02-8:45

2 stops29h 43m

R16 299

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Wed 22/4

20:25-19:42

2 stops31h 17m

Denver Intl

Wed 29/4

18:01-8:25

2 stops30h 24m

R16 299

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Wed 22/4

8:45-14:20

1 stop37h 35m

Denver Intl

Wed 29/4

17:40-8:35

1 stop30h 55m

R18 513

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Thu 16/4

12:10-19:42

2 stops39h 32m

Denver Intl

Thu 3/12

23:59-15:50

2 stops30h 51m

R18 896

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 4/4

17:00-21:46

2 stops36h 46m

Denver Intl

Sat 11/4

23:59-0:15

2 stops40h 16m

R18 912
Fastest return journey

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Tue 21/4

19:00-15:40

1 stop28h 40m

Denver Intl

Mon 11/5

16:05-6:40

1 stop30h 35m

R20 078

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Sat 4/4

21:55-0:09

1 stop34h 14m

Denver Intl

Sat 11/4

6:20-19:40

2 stops29h 20m

R21 509

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Tue 23/6

21:15-19:36

2 stops30h 21m

Denver Intl

Thu 23/7

15:11-7:00

2 stops31h 49m

R22 741
Cheapest one-way

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Tue 17/3

20:30-22:59

2 stops34h 29m

R12 253

JohannesburgDenver

JNB - DEN

JNBDEN

Johannesburg OR Tambo

Mon 16/3

12:45-23:04

2 stops42h 19m

R12 403

Flights are sorted by cheapest return flights first.

Deals found on 6/3

Showing 1-10 of 18 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

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 6 March 2026.

To ensure you get the cheapest price possible for a flight to Boulder, you should look to book at least 77 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 15 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.

British Airways
British Airways
From R16 298
United Airlines
United Airlines
From R15 677
Virgin Atlantic
Virgin Atlantic
From R14 663
KLM
KLM
From R15 771

What are the cheapest airlines that fly to Boulder?

The cheapest airlines flying from Johannesburg to Boulder are American Airlines, Virgin Atlantic 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 10 March 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
1 468 reviews
Check prices

Food

7,3

Boarding

7,8

Comfort

7,6

Overall

7,8

Entertainment

7,1

Crew

8,4

Reviews

1 / 20
2,0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7,8
Good
1 468 reviews
KLM
7,8
Good
1 468 reviews
Check prices

Food

7,3

Boarding

7,8

Comfort

7,6

Overall

7,8

Entertainment

7,1

Crew

8,4

Reviews

1 / 20
2,0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7,5
Good
680 reviews
KLM
7,8
Good
1 468 reviews
Check prices

Food

7,3

Boarding

7,8

Comfort

7,6

Overall

7,8

Entertainment

7,1

Crew

8,4

Reviews

1 / 20
2,0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
United Airlines
7,4
Good
9 409 reviews
KLM
7,8
Good
1 468 reviews
Check prices

Food

7,3

Boarding

7,8

Comfort

7,6

Overall

7,8

Entertainment

7,1

Crew

8,4

Reviews

1 / 20
2,0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Lufthansa
6,8
Okay
7 840 reviews
KLM
7,8
Good
1 468 reviews
Check prices

Food

7,3

Boarding

7,8

Comfort

7,6

Overall

7,8

Entertainment

7,1

Crew

8,4

Reviews

1 / 20
2,0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
British Airways
6,7
Okay
7 781 reviews
KLM
7,8
Good
1 468 reviews
Check prices

Food

7,3

Boarding

7,8

Comfort

7,6

Overall

7,8

Entertainment

7,1

Crew

8,4

Reviews

1 / 20
2,0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 441, however they can be found for as little as R3 163.

  • 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 15 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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