R12 418 Find Cheap Flights to Boulder

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Boulder departing on 13/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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Cheap Flight Deals to Boulder

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights to Boulder that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals to Boulder

Recommended return deals departing in the coming months from the most popular airlines that fly to Boulder.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
18:50 - 15:30JNB-DEN
28h 40m1 stop
16:50 - 19:40DEN-JNB
18h 50m1 stop
R17 114Delta
Find Deal
Mon, Apr 7 - Mon, Apr 14
18:50 - 15:30JNB-DEN
28h 40m1 stop
0:55 - 19:40DEN-JNB
34h 45m1 stop
R17 206Delta
Find Deal
Mon, Apr 7 - Sun, Apr 13
2:30 - 22:44CPT-DEN
28h 14m2 stops
6:30 - 21:25DEN-CPT
30h 55m2 stops
R17 316Delta
Find Deal
Mon, Mar 17 - Wed, Jun 11
18:50 - 17:25JNB-DEN
30h 35m2 stops
17:40 - 8:30DEN-JNB
30h 50m1 stop
R17 554Air France
Find Deal
Tue, Jun 10 - Tue, Jun 17
18:50 - 18:11JNB-DEN
31h 21m2 stops
12:59 - 8:30DEN-JNB
35h 31m2 stops
R17 866Air France
Find Deal
Wed, May 7 - Thu, May 22
21:15 - 16:25JNB-DEN
27h 10m1 stop
13:45 - 7:00DEN-JNB
33h 15m2 stops
R19 774British Airways
Find Deal
Sat, May 10 - Sat, May 24
21:15 - 16:25JNB-DEN
27h 10m1 stop
13:45 - 7:00DEN-JNB
33h 15m2 stops
R19 847British Airways
Find Deal
Sat, May 10 - Sat, May 24
18:30 - 16:55CPT-DEN
30h 25m1 stop
17:47 - 15:20DEN-CPT
37h 33m2 stops
R21 168United Airlines
Find Deal
Tue, Mar 18 - Wed, Jun 11
18:30 - 16:55CPT-DEN
30h 25m1 stop
23:50 - 15:20DEN-CPT
31h 30m1 stop
R21 278United Airlines
Find Deal
Tue, Mar 18 - Wed, Jun 11
17:50 - 17:55JNB-DEN
32h 05m1 stop
19:50 - 10:35DEN-JNB
30h 45m1 stop
R27 276Turkish Airlines
Find Deal
Sat, May 10 - Sat, May 24

Good to know

Low season

October

High season

December

Cheapest flight

R12 418
Best time to beat the crowds (15% less expensive on average)
Most popular time to fly and prices are also 4% lower on average.
Flight from Johannesburg to Denver

FAQs - booking Boulder flights

  • How to fly to Boulder?

    You cannot fly directly to Boulder. KAYAK recommends you fly to Denver Intl (DEN) (53,76 km from Boulder). From there you can hire a car or take a taxi.

  • What airports are near Boulder?

    The closest airport is Denver Intl (DEN) (53,76 km). KAYAK recommends you fly to Denver Intl.

  • How far is Denver Intl Airport from central Denver?

    You’ll need to travel 30 km to reach the Denver city centre from Denver Intl Airport.

  • What is the name of Denver’s airport?

    There is only 1 airport in Denver, called Denver Intl Airport (DEN). It can also be referred to as Denver or Denver Intl.

  • How does KAYAK find such low prices on flights to Boulder?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Boulder.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Boulder?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Boulder is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Boulder?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Boulder with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Boulder?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Boulder up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Boulder

  • There is no major airport in Boulder. It is instead served by Denver Intl Airport.
  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly from South Africa is February.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Boulder flight deals.
See more tips

Top 5 airlines flying to Boulder

Need help choosing which airline to fly with from South Africa to Boulder? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7,8
KLMOverall score based on 1330 reviews
7,3Food
7,7Comfort
7,2Entertainment
7,8Boarding
8,3Crew
Airline reviews

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

2,0 Mediocrejack, Jan 2025CPT - AMS
Read more KLM reviews

Overall very poor. Flight was disorganised, staff were rude and this is my second experience with KLM that I've had baggage go missing. It feels like, if you are an economy customer, KLM staff do not show you any care. I shall never fly with KLM again. Worst airline in Europe

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Good flight with KLM, friendly staff. Food was good, had much worse on other airlines. Selection of drinks also good enough for us. Entertainment was also good. The economy seats are ok and that’s it. For a 12 hour flight I think a little more comfort in the economy seats in pitch and softness would be highly appreciated by the customers and can makte the difference.

Good food. Excellent crew service. Clean aircraft. Narrow seats and isle.

There was fog in Amsterdam so many flights were delayed because of the weather. Air France knew that the flight would be delayed by two hours but still boarded the plane on time. Instead of letting the passengers wait at the gate we were crammed into the plane. It was uncomfortable. No refreshments were given. I couldn’t charge my devices onboard.

The food & entertainment really stood out in terms of quality. The nasi goreng & chicken satay were absolutely delicious. It’s great that KLM feature international cuisine.

Seats were comfortable crew members support was very good but AVML ordered or selected by us needs a lot of improvement.

Transavia flight, was booked as KLM but i couldnt select seat or access boarding pass with KLM at all. Crammed seating and very no frills experience all around. First and last time.

Seats were nice and comfy. Crew was polite and attentive. Business class is awesome and worth the money.

Overall a very pleasant flight. No significant issues on either flight. Amsterdam airport is very convenient for connecting

Much better than the major US Carriers especially in Biz Class.

I wish that the meal included a vegetable or even a salad instead of couscous! Why serve chicken with rice AND couscous? Service was good overall though a bit lacking in friendliness. Usually on air france I've been offered a glass of champagne before dinner, wine with dinner, and a digestif after dinner. We were only offered wine this time!

It was not Air France but Air Europa. But confusion over our checked luggage. Whether it was checked all the way to Tenerife or not. It was not. Had to line up again in Departures. At least our Sky Priority was honoured. Flight was fine.

My wife and I had a row to ourselves after moving seats. There were no TVs and you had to buy food. So we did nothing but had a quick nap. Flight was fine.

The male attended that served are section was a snob. He did not answer my call light when my wine spilled all over the floor. I did not push it again or drew his attention to it. He just ignored the call light when he came to give us our meal, serving the people behind us first. I did not push it again or drew his attention to it to see his reaction. It was so obvious that he was ignoring us. We were in premium economy!

The plane was old Only 3 bathrooms available for economy The entertainment was old and the selection was poor

Georgian Airways check in staff initially denied us, because they thought passengers required transit visas to transfer on connecting flights. This required 70 minutes for them to call multiple people to confirm how transfers worked. They did not apologize once accepting our check in. Onboard, the four hour flight gave stale bread with spam slices as lunch. The only included drinks were still or sparkling water.

I did not get my baggage at my final destination..poor coordination with connecting flights with partner airlines (Saudi airways). Also the food was very mediocre.

Not a good one this time. The absence of internet without any information/notification ahead was really the unacceptable part. Also this new A350-900 has a serious legroom challenge for economy seats. It’s more like a medium-haul flight legroom configuration.

Not great , just ok . I expected better food but it did not deliver . Flight staff was ok . The guy at the drop off bag counter was the only saving grace in this whole trip . He was pleasant, friendly and very helpful . You couldn’t ask for a better assistance from him .

Food choices were very limited. Taste of the dishes was average.

I liked all the informational texts. I always knew where to go and when .

Not as good as expected Air Can needs to improve totally rated on internet as worst

Received an email the night before showing that there would be seatback entertainment on our flight. We get on and there was no seatback entertainment. And then it was a scramble to try to set up the iPads for the kids before takeoff so they could watch something for the four hour flight.

The reason I don’t fly United. No in seat entertainment for a long flight and inconsistent WiFi and entertainment available from my device.

It was 4 hours late. Almost missed my connecting flight no food or drinks on connecting flight. Overall terrible experience

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

The food for long haul was poor compared to Singapore airlines economy. Pasta plain with tomato sauce . Singapore airlines give me Hagen dash small ice cream cup it was great. The choices of dinner course Singapore air also much better The crew mostly friendly. The economy seat are as expected.

The plane was clean. The staff was excellent. The flight attendants were very good. Enjoyable flight. Overall. The seats in the back are too small but, will always be.

I was at the back of the plane with earphones, and I could still hear the chatty flight attendants; I wasn't able to sleep at all.

Service and food were decent, seats are a bit too narrow. Leg room is normal. Bathroom should be cleaned more frequently. WiFi is cumbersome and should be simplified.

they have cancell the flight with no reasons, My parents were in the cold weather in the airport for 24 hours they did not give any hotel and food. I hate Turkish Airline, this is our last time that we ha ve chosen Turkish Airline.

Same as before boarding process and lack of crew experience in the process

Turkish Airlines is amazing. I have a problem with the ticket I purchased through the kayak website. I have filed a complaint related to the fact that I was contacted by phone on the day I purchased the ticket and told that the amount that the ticket had been advertised for was not accurate and that I had to pay more. This is totally fraudulent. I will look into addressing this further tomorrow and will never ever use kayak again.

Bad service and food was not good. Give very less food.

Crew members, pilots and flight attendants are excellent. Beside, that, customer service is very lacking in all aspects of Turkish airlines

The ac did not work and the plane was deployed for the AC BUT IT NEVER WORKED. I have high blood pressure and I was SWEATING AND NEARLY PASSED OUT. Do better.

For me it was a good experience… thank you Turkish Airlines

Old aircraft, very very low business class standards, no privacy between the seats, horrible old TVs, tiny bathrooms.

Good service, the airline also provided a traveling kit bag (tooth brush, socks, slippers, visor for sleeping).

Boarding crew is unfriendly as i was asked to handover carryon luggage too upto final destination Bangalore I was not prepared for that and i had to travel without my diabetic and hypertension medicines

American Airlines seemed to run a 'dry' flight. No alcohol was offered at any point with meals. Breakfast was a bit tasteless. The 'hot pocket' whatever that is, was horrid breadish pastry with very little filling. Decaf coffee was horrid. Seats didn't seem as wide or spacious as usual, especually for a ten hour flight.

They did not provide free WiFi, It could be purchased for, I think, around $25, This seemed excessive.

Less than average, low level of shared required information needed during the transfer from airport to another, also the used team during boarding In Indianapolis station is Not Professional

Reliable, great value, but not outstanding in any aspect. This is similar to the experience you get in most international carriers like Etihad or Delta.

Flight got diverted because of an emergency and the crew were fantastic and probably saved that passenger’s life. While in emergency landing some measures could have been taken to prevent additional delays. In general not great experience with BA. I used to fly BA years ago all the time, very disappointed by the whole experience, seats were tight, bathrooms tight.

Business class area too small and chair and equipment not comfortable .

Lost my luggage in London Was double charged for luggage

Boarding could have been better organized. The one member of staff disappeared for a while so boarding by group relied on honesty.

I never made this flight but the staff helped to get me rebooked (see previous review)

Book Cheap Boulder Plane Tickets

Recent return flight deals

7/4Mon
1 stopDelta
28h 40mJNB-DEN
14/4Mon
1 stopDelta
18h 50mDEN-JNB
R17 114
7/4Mon
1 stopDelta
28h 40mJNB-DEN
13/4Sun
1 stopDelta
34h 45mDEN-JNB
R17 206
17/3Mon
2 stopsDelta
28h 14mCPT-DEN
11/6Wed
2 stopsDelta
30h 55mDEN-CPT
R17 316
10/6Tue
2 stopsAir France
30h 35mJNB-DEN
17/6Tue
1 stopAir France
30h 50mDEN-JNB
R17 554
7/5Wed
2 stopsAir France
31h 21mJNB-DEN
22/5Thu
2 stopsAir France
35h 31mDEN-JNB
R17 866
10/5Sat
1 stopBritish Airways
27h 10mJNB-DEN
24/5Sat
2 stopsBritish Airways
33h 15mDEN-JNB
R19 774
10/5Sat
1 stopBritish Airways
27h 10mJNB-DEN
24/5Sat
2 stopsBritish Airways
33h 15mDEN-JNB
R19 847
18/3Tue
1 stopUnited Airlines
30h 25mCPT-DEN
11/6Wed
2 stopsUnited Airlines
37h 33mDEN-CPT
R21 168
18/3Tue
1 stopUnited Airlines
30h 25mCPT-DEN
11/6Wed
1 stopUnited Airlines
31h 30mDEN-CPT
R21 278
10/5Sat
1 stopTurkish Airlines
32h 05mJNB-DEN
24/5Sat
1 stopTurkish Airlines
30h 45mDEN-JNB
R27 276

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Recent one-way flight deals

13/3Thu
2 stopsQatar Airways
33h 48mJNB-DEN
R12 418
13/3Thu
1 stopTurkish Airlines
31h 35mJNB-DEN
R13 280
2/3Sun
3 stops
54h 25mJNB-DEN
R14 253
22/5Thu
2 stopsQatar Airways
41h 03mJNB-DEN
R15 152
2/3Sun
2 stopsQatar Airways
41h 18mJNB-DEN
R15 262
21/5Wed
2 stops
50h 29mJNB-DEN
R15 977
22/5Thu
1 stopAir France
28h 40mJNB-DEN
R16 417
1/3Sat
2 stopsKenya Airways
51h 31mJNB-DEN
R18 050
13/3Thu
3 stopsUnited Airlines
29h 55mJNB-DEN
R21 553
2/3Sun
1 stopUnited Airlines
23h 11mJNB-DEN
R84 948

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Last minute flights to Boulder

Last minute flight, train and bus deals

26/2Wed
multi-stopKenya Airways
43h 16mJNB-DEN
12/12Fri
multi-stopKenya Airways
46h 41mDEN-JNB
R26 084
26/2Wed
multi-stop
43h 16mJNB-DEN
12/12Fri
multi-stop
25h 45mDEN-JNB
R43 180

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Everything you need to know for your flight to Boulder

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