$728 Find Cheap Flights to Boulder

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Low season

April

High season

February

Cheapest flight

$728
Best time to beat the crowds but there is an average 7% increase in price.
Most popular time to fly and prices are also 9% lower on average.
Flight from Auckland 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 rent a car or get 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?

    The distance between Denver Intl Airport and the city centre of Denver is 30 km.

  • 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 New Zealand is November.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Boulder flight deals.
See more tips

Top 4 airlines flying to Boulder

Need help choosing which airline to fly with from New Zealand 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.
7.9
Air New ZealandOverall score based on 485 reviews
7.9Comfort
7.2Food
8.2Boarding
7.4Entertainment
8.5Crew
Airline reviews

The flight we had booked was cancelled due to bad weather conditions, but we were lucky to arrive at the airport quite early and got a seat on an earlier flight. The flight was mostly nice, but there were some hefty turbulences towards Queenstown. One of the passengers behaved hysterically. It would have been great if the crew had done something to calm her.

8.0 ExcellentSamuel, Jan 2025AKL - ZQN
Read more Air New Zealand reviews

The flight we had booked was cancelled due to bad weather conditions, but we were lucky to arrive at the airport quite early and got a seat on an earlier flight. The flight was mostly nice, but there were some hefty turbulences towards Queenstown. One of the passengers behaved hysterically. It would have been great if the crew had done something to calm her.

Sitting in an aisle seat equals getting hit by food cart and spilled on multiple times Food: gross and minimalistic Crew: frumpy and kurt Sound on multiple entertainment platforms poor Not an earplug problem, system soundboard poor

Major hassle with the weight of carryon luggage Having to repack bags at airport Not an issue in most of world Ridiculous issue considering the 400 pound gentleman sitting behind us

Overall experience was poor. In general crew was polite in speaking but that was all about it. I am vegetarian so I always carry a cup noodle box with me just in case. So I pressed "CALL" button for hot water for my cup noodle on my seat and waited for 10-15 minutes but nobody came. I personally took the box and went all the way to back of the plane. When I requested stewardess to put hot water in my cup noodle she refused as it was a "safety" hazard. I told her that you always serve coffee and tea these are also hot. But she still refused. I went back to my seat and from the seat I ordered hot water and it was brought to me without any problem. I poured THAT hot water in my cup noodle and ate. I was sitting in seat 36A, which was 2nd row in economy class. After eating my noodle I took the box and went 2 rows in the front where there was a kitchen to throw it. Again the stewardess there told me she didn't have a waste bin there and asked me to go back of the plane and throw it there. Tell me if above experiences are 'ok' for your airline??

Liked the non-stop option, can always use more leg room!

Wonderful Airlines…our American Airlines could learn from ANZ. From boarding to landing everyone was professional and gracious. Kiwi’s really are the nicest of all people! Thank you

typical long haul economy flight. Food was mediocre, inflight service was average. Offered in flight snacks but in seat ordering didn't work. Entertainment was good.

Would have been nice to have decaf coffee as an option, and perhaps a scone

Overall, a great experience from food and crew. The only setback was that this was the Second flight from Air New Zealand within a week that was an hour late for boarding.

The flight attendances were very helpful and friendly ! Dinner and breakfast were great . The seat was not too comfortable though .

I have flown Qantas multiple times in the past it seemed this flight the plane had less seat room or the seats were way less comfortable than before. Everything else was about the same. Thanks

Our baggage didn’t arrive with us on the plane. Need I say more?

American Airlines was their usual junk service — but at least it got us down to LA. I was more irritated that while they codeshare with Alaska Airlines in Seattle, they could not out our flight on one of these, opting for one of the small SkyWest operated American Eagle flights — and causing a 14 hour layover. Which I accepted due to a $2000 difference in airfare — that said it was irritating for a flight that usually would have cost around $100 extra, if that.

nothing to complain about w/the food, and professionalism of the crew. i just cant stand being on a flight for that long of a time.

Everything was great from the staff to the seats and food. The plane was timely taking off and landing.. I couldn't have asked for a better experience (especially on such a long flight)

Good communication regarding any updates time of flight and flight delayed. The fight was delayed by two and half hours at eleventh hour. That was unexpected, especially when you international passenger.

The service was excellent. The quarters were a little cramped in Economy, and we had to exist there for 18 hours.

It was very nice. I will try to fly with Qantas whenever I can.

Terrible. 6 hour delay with no explanations and only 15 dollars in food credits. A disaster. I'll just leave it at that.

We lucked out. The passenger who was supposed to be in our row changed her seat, so my husband and I had 3 seats for the 2 of us. We were able to stretch out a little which made the trip much more tolerable.

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.

Flight was 3 1/2 hour delayed with no credit or meal vouchers

My one complaint was that while we boarded using the standard enclosed gangway, when we arrived at SEATAC, the ground crew were slow to hook up the stairs. After reaching the tarmac we had to walk up a long ramp all outside in 35° weather. We just came from Bali and did not have warm weather clothes. This was in addition to having to collect our bags in Vancouver, take them through security again and then having to show our passports 4 more times all within the Air Canada section.

So we didn't actually go. We were hoping to go for the Inauguration of the first female president. When That Guy got elected, we bailed. Unfortunately, we got basically none of our money back, despite having travel insurance. Would not fly with Air Canada again unless I had to.

flight was delayed, there was open communication about the delay the delay pushed way past the posted delay time and

Ok Did not like that the second leg of flight was moved earlier making it a rush to make it

This was my first time flying on Air Canada and the experience was good and pleasant enough, great crew members and the price I paid was amazing,

This was my first time and the experience was good and pleasant enough, great crew members and the price I paid was amazing,

Overcharged by either United or Air Canada. Abuse of access to my credit/debit card.

I was overcharged either by United or sister airline Air Canada. It's exhausting dealing with companies nowadays that irresponsibly abuse access to credit/debit cards.

Air Canada is not only the worst airline in the business but the worst business in history.

Your crew was so so so wonderful Only thing sound be great if you kept some phone chargers and converters rest 👌👌👌👌

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Recent return flight deals

19/2Wed
2 stopsAir Canada
30h 55mAKL-DEN
26/2Wed
1 stopAir Canada
19h 24mDEN-AKL
$1,563
18/3Tue
1 stop
23h 20mAKL-DEN
31/3Mon
2 stops
26h 05mDEN-AKL
$1,581
19/2Wed
1 stopAmerican Airlines
23h 22mAKL-DEN
26/2Wed
1 stopAmerican Airlines
31h 10mDEN-AKL
$1,642
19/2Wed
1 stopAmerican Airlines
28h 49mAKL-DEN
26/2Wed
2 stopsAmerican Airlines
19h 16mDEN-AKL
$1,651
5/3Wed
2 stopsAir Canada
22h 47mAKL-DEN
19/3Wed
2 stopsAir Canada
23h 20mDEN-AKL
$1,787
14/2Fri
2 stopsAir Canada
30h 20mAKL-DEN
16/2Sun
1 stopAir Canada
21h 00mDEN-AKL
$1,792
22/3Sat
2 stopsDelta
29h 02mAKL-DEN
31/3Mon
2 stopsDelta
41h 00mDEN-AKL
$2,233
22/3Sat
1 stopAir New Zealand
31h 44mAKL-DEN
31/3Mon
1 stopAir New Zealand
29h 00mDEN-AKL
$2,261
18/4Fri
2 stopsUnited Airlines
31h 24mAKL-DEN
3/5Sat
1 stopUnited Airlines
38h 39mDEN-AKL
$2,444
18/4Fri
2 stopsUnited Airlines
33h 01mAKL-DEN
3/5Sat
3 stopsUnited Airlines
28h 50mDEN-AKL
$2,472

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Recent one-way flight deals

8/2Sat
2 stops
33h 02mAKL-DEN
$728
8/2Sat
3 stops
30h 21mAKL-DEN
$744
7/6Sat
2 stops
26h 46mAKL-DEN
$801
15/6Sun
1 stopAir Canada
22h 33mAKL-DEN
$1,045
7/6Sat
1 stopAir New Zealand
19h 45mAKL-DEN
$1,116
29/3Sat
2 stopsQantas Airways
26h 46mAKL-DEN
$1,186
29/3Sat
1 stopAir New Zealand
31h 13mAKL-DEN
$1,274
21/2Fri
3 stopsQantas Airways
42h 47mZQN-DEN
$2,127
23/6Mon
2 stopsUnited Airlines
26h 10mAKL-DEN
$5,073
23/6Mon
3 stopsUnited Airlines
31h 03mAKL-DEN
$5,715

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