Find cheap flights to Boulder from R10 172

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight departing on 18/3. 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.
1 adult
Sat 30/12
Sat 6/1
In the last 7 days travellers have searched 44 312 419 times on KAYAK, and here is why:

Find the best priceCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Free to useThere are no hidden charges or fees.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Search hundreds of travel sites at once for deals on flights to Boulder

Good to know

Low season

January

High season

December

Cheapest flight

R10 172
Best time to beat the crowds (4% less expensive on average)
Most popular time to fly and prices are also 5% 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). Another nearby airport is Colorado Springs (COS) (142,97 km) KAYAK recommends you fly to Denver Intl.

  • How far is Denver from central Denver?

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

  • What is the name of Denver’s airport?

    There is only 1 airport in Denver, called Denver (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 July, August and September. The cheapest month to fly from South Africa is January.
  • 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 KAYAK reviews.
8,6
Singapore AirlinesOverall score based on 3983 reviews
86entertainment
87overall
88boarding
85comfort
89crew
83food
Airline reviews

Crew is phenomenal. Helpful with anything you may need. Lots of entertainment options. Food was good. On time, no complaints.

Read more about Singapore Airlines

Crew is phenomenal. Helpful with anything you may need. Lots of entertainment options. Food was good. On time, no complaints.

I didn’t get to go, and no refund was available after asking for 2 months

Seamless fussy free flight. Great service as expected of SIA.

Bangkok airport needs a redesign to make it more accommodating for passengers with long layovers between flights. It needs a better selection of restaurants, stores and rest rooms near the departure gates. It also needs a shuttle or other transport system to help passengers transit the long distances between gates in different concourses.

Pros: "Crew very polite and friendly"
Cons: "Crew forgot to bring me things twice so I had to ask another crew member on both occasions."
Pros: "Flat bed is wide and comfortable. Cabin crew was excellent."
Pros: "I didn't like the trip much. After the trip we found out that our body was bitten by fleas. Our body is now full of rashes, every part of my body is so itchy. We was seated in 61A and 61C, seems like in the previous flight a dog was sitting there or some kind of animal that left fleas in the sit."
Cons: "Please clean better the seats. This is unacceptable, not a good way to start a trip in Japan. We only hope to get better sitting in our last flight with SQ, from Japan to LA."
Pros: "The crew was terrific. Always smiling and helpful."
Cons: "If you need more space economy is a tight fit. It would be better to upgrade."
Pros: "Nothing."
Cons: "Everything. Singapore Airlines had a great reputation. Imagine my disappointment. It was a horrible flight. The crew was nice enough, but inattentive. The food, if such a term may be applied here, was inedible. Just vile. In flight entertainment was a complete joke. Boarding was awful, but it always is. Seats were extremely uncomfortable. This racket is the ultimate way to rip somebody off of $1000. Horrible."
Pros: "Service was great on both sectors"
Cons: "Premium economy seat is still not comfortable enough in comparison with economy."

Very tight seating. Crew seemed too dis interested and too slow to remove main meal trays.

Pros: "I would have appreciated that with ALL required paperwork, my stay at check in point would have lasted a little less than two hours I spent standing and waiting for a feedback."
Cons: "Updating clients and offering a seat if it’s a long wait could have improved the situation. It is on reception that the business gets its impression. Thanks."
Pros: "Crew was great. They made up for mistakes in a positive and amenable way."
Cons: "Flight was late. There was no communication about it. The flight from Joburg to Doha was late, therefore I missed my connection. The delay was not officially communicated to any of the passengers — no announcements made, no representatives to talk to at the gate — until well past the time that we should have been in the air. It was distressing."
Pros: "Nothing special"
Cons: "I found my seat a bit uncomfortable for this leg of the jurney"
Pros: "The service of the cabin was great!"
Cons: "The food was not of the quality I would have expected from the expectation created by the airlines marketing. We boarded close to a full hour later than scheduled and the boarding process was very slow."
Pros: "decent leg room. the staff was accommodating"
Cons: "the brea was har. some of the food was overheated thus making it hard to eat"
Pros: "Fantastic service, very friendly staff who are always happy to help"
Cons: "Should have internet free of charge in flight"
Pros: "Foods, crew are accomodating and all sevice facility are very good"
Cons: "Just update the movies regularly"
Pros: "I was surprised with the quality of gluten free meals served for me, it was well organised and taken care of where I never had to wait. My flight schedules were changed few days before departure by Qatar Airways, but only thing I had to do was to confirm that I have noted, my seats and all the rest of details intact, excellent."
Cons: "The change of my flight schedule for the entire journey was done without giving me any options (departure flights from origin and return). It would have caused me inconvenience if the change of time does not allow me to adjust my plans."
Pros: "Great flight. Everything was good. The only very small issue is hey offer WiFi but even if you pay the allocation of data make you feel like you living in the 1990. 10 meg free and 300 meg for a whole flight is a complete joke, especially for USD 30. They could manage protocols but give a reasonable service."
Cons: "WiFi"
Pros: "Delta is doing a great job keeping everything calm and clean during this pandemic!"
Pros: "Definitely pick comfort plus on this flight if you can. You can walk around a lot more on this flight compared to other flights. Food was really good! Recommend the overnight flights...."
Cons: "More leg room would have been nice..."
Cons: "Wouldn’t change a thing! I don’t always fly! But when I do!! I fly delta!!"
Pros: "The staff at Delta are always friendly and helpful and they were able to squeeze me onto a very full flight."
Pros: "I always have a consistently good experience on Delta. Everything was great."
Cons: "It was a Great flight. I always enjoy flying Delta"
Cons: "My flight was delayed almost 3 hours. Not good. Once in the air it was fine."
Pros: "The crew was great and the free entertainment was great"
Cons: "Bring back pillows and blankets especially on red eyes out of Anchorage"
Cons: "Flight was delayed and completely packed so our family could not get seats together"
Pros: "The seat was great, I wish all seats on the plane were that comfortable"
Cons: "Nothing, everyone was great"

Amazing KLM service and brilliant economy comfort seats. Well worth the extra.

Pros: "Friendly crew, great access to a variety refreshments, robust entertainment library."
Cons: "No suggestions."
Cons: "I had paid for an upgrade to sit in the front of the cabin with extra legroom (row 14A). When I boarded a man sat it my seat. He had not paid for the upgrade, but the crew let him stay in my seat. I had asked him to social distance but he continued to sit right behind me bo matter which seat I moved to. He argued with the crew until they gave up and let him stay. They did not check his boarding pass or ask him to move to his assigned seat I found a different seat away from him but I don’t see the point in paying for extra legroom when the crew let’s people who haven’t paid for it sit it those seats. I felt harassed by the man and was very uncomfortable the whole flight. I am considering my next step, I think I should at least receive a refund for the upgrade I paid for."
Pros: "The best airline ever! Super friendly crew and staff, great customer service and nice planes. Love KLM!"
Cons: "Boarding at Florence is always chaotic but this isn't within the control of KLM or their crew."
Pros: "Very friendly and responsive crew. Announcements from the Capitan and chief of flight attendants are very informative and comforting. Seat positions: very good leg room (even in economy)!"
Cons: "Newer airplane, as 747s are kind of outdated now, especially for long distance flights. But overall had good experience with KLM"
Pros: "Crew were excellent"
Cons: "Old aircraft. Uncomfortable seats in economy. Entertainment screens old and almost impossible to watch - watched my iPhone! No mobile phone charger."
Pros: "Good amount of space on the plane, lots of movies to watch, good food and drink."
Pros: "The crew was amazing, flight on schedule and good entertainment."
Cons: "Space is just reasonable on a long flight, even if there's seats more spacious that you could choose if you pay more."
Pros: "Seat was comfy and spacious for economy class"
Cons: "Vegetarian meal was okay but could be more enjoyable if served with bread at start of meal."
Pros: "Very attentive staff Good info from captain and flight crew Nice individual TV"
Pros: "Lufthansa is a good company overall. The entertainment system was very good."
Cons: "The usual - cramped space although I was fortunate enough that the middle seat wasn't occupied"
Pros: "Food was great and the staff were even better. We were served lunch and dinner. I watched at least 4 movies. The staff provided great snacks and wonderful company. Great flight."
Pros: "Flying premier economy. Flight was on time...no crying babies. Very friendly crew"
Cons: "Long lines to get through boarding"
Cons: "The flight was transferred to a smaller plane, either because there were few passengers (the first story we heard) or because of mechanical problems on the original craft (the second story). Business class was oversold as a result, and boarding was delayed for an hour while they waited for enough BC passengers to accept 800 euros for the downgrade to economy plus. They repeatedly threatened to cancel the flight rather than raise the offer. Eventually enough knuckled under and we were allowed to leave. Some no doubt missed connections because of this petty brinkmanship. The funny coda is that because the plane was so undersold, anyone in economy that wanted their own row could have one, while economy plus was packed with the embittered and downgraded."
Pros: "I always try to fly with Lufthansa when I do go to Germany to visit my family. At times they might be more expensive then others but you don't pay extra for everything. Also I got a great price at Kayak. The service was excellent and I do love the fact that Lufthansa is now flying directly from Denver to Munich makes it so much easier."
Pros: "The aircraft was clean. The service was great. Food was OK. I enjoyed the wine service. Lots of movie choices. HOW does one get "bumped up" to Premium Economy?"
Cons: "The seats in Economy were the most uncomfortable I have ever sat in for such a long time nine and a half hours. All six of us found them to be uncomfortable. No seat bottom cushioning. I had a back pain. Boarding started with the First Class and Business Class first. It took an additional 20 minutes for Economy class to start boarding. The line was very, very long and interfered with other travelers in the airport terminal. "boarding area to Frankfurt was cramped" When we arrived in Denver, only five Custom Agents were on duty to process our arrival passports, although there are 14 control stations at Denver. It appeared as though the Custom Agents were not aware of the arrival of the Lufthansa 747 nor the one that followed. All other Custom in Europe were much more efficient and move people through quickly. What a bad first impress made by the USA Customs people."
Pros: "Good food, friendly flight attendants"
Cons: "Boarding process was torture. Lufthansa invited us to check-in early, but would not allow us to finish the check-in online process the day prior: seemed to be glitch in their computer system. We arrived at the airport early, but no one at Lufthansa could help us with seat assignments in order to seat our 12-yo daughter next to a partent. The airline did not open the gate area until 1+35 prior to the flight (advertised 2-hrs prior), and did not put anyone at the gate-desk until 1-hr prior to departure ...and they still could not help us. Boarding was disorganized; Lufthansa appeared to board by different groups, but there were no announcements as to which group(s) should board. Instead there was just a large crowd milling about, waiting to push their way to a gate agent. Very un-German."
Cons: "The monitor at my seat wouldn't load and when rebooted displayed only 9 movie choices and very limited audio book selections."
Pros: "Flight attendants were always there when you needed them and were super nice. The plane was very clean and orderly and the crew just made it a really great flight."
Cons: "I really have no complaints at all. It was a super great flight and I will choose Lufthansa whenever possible when I fly in the future!"

Book Cheap Boulder Plane Tickets

Recent one-way flight deals

18/3Mon
2 stops
42h 59mJNB-DEN
R547
17/3Sun
2 stops
53h 54mJNB-DEN
R588
15/3Fri
2 stopsDelta
35h 29mJNB-DEN
R723
16/3Sat
2 stopsDelta
30h 31mJNB-DEN
R724
20/3Wed
2 stops
45h 19mJNB-DEN
R726
18/3Mon
1 stopBritish Airways
28h 35mJNB-DEN
R738
17/3Sun
1 stopBritish Airways
28h 35mJNB-DEN
R740
16/3Sat
1 stopUnited Airlines
29h 30mJNB-DEN
R927
6/1Sat
2 stopsUnited Airlines
48h 31mCPT-DEN
R951
11/1Thu
1 stopLufthansa
29h 30mJNB-DEN
R1 936

Search by stops

Search by airline

Search by price

Recent return flight deals

12/2Mon
2 stops
30h 58mJNB-DEN
12/3Tue
1 stop
32h 00mDEN-JNB
R877
9/2Fri
1 stopBritish Airways
28h 40mJNB-DEN
12/3Tue
1 stopBritish Airways
29h 10mDEN-JNB
R885
11/2Sun
2 stopsKLM
29h 54mJNB-DEN
12/3Tue
2 stopsKLM
26h 40mDEN-JNB
R899
9/2Fri
2 stopsDelta
33h 23mJNB-DEN
12/3Tue
2 stopsDelta
26h 33mDEN-JNB
R909
9/2Fri
1 stopDelta
21h 53mJNB-DEN
12/3Tue
2 stopsDelta
31h 55mDEN-JNB
R911
11/2Sun
1 stopBritish Airways
26h 05mJNB-DEN
12/3Tue
2 stopsBritish Airways
30h 45mDEN-JNB
R940
14/12Thu
2 stopsUnited Airlines
33h 15mJNB-DEN
31/12Sun
2 stopsUnited Airlines
27h 35mDEN-JNB
R1 141
14/12Thu
2 stopsUnited Airlines
33h 15mJNB-DEN
31/12Sun
3 stopsUnited Airlines
27h 35mDEN-JNB
R1 249
14/12Thu
2 stopsLufthansa
38h 25mJNB-DEN
1/1Mon
2 stopsLufthansa
36h 45mDEN-JNB
R1 470
18/2Sun
2 stopsKLM
31h 46mCPT-DEN
28/3Thu
2 stopsKLM
26h 35mDEN-CPT
R5 800

Search by stops

Search by airline

Search by price

Flights to Boulder

Browse origins:

Browse destinations: