Find flights
Airlines

$870+ Cheap flights to Boulder

— DEN
10 Oct — 17 Oct1
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

Tue 24/1108:00 -
2 stops24h 20m
Sun 29/1119:00 -
2 stops27h 00m
Deal found 8/9$1,990
Thu 22/1015:00 -
2 stops37h 30m
Thu 29/1013:10 -
1 stop21h 40m
Deal found 7/9$2,036
Tue 17/1120:20 -
1 stop17h 15m
Sun 6/1210:25 -
2 stops32h 20m
Deal found 10/9$2,057
Mon 12/1012:05 -
2 stops42h 16m
Mon 19/1018:42 -
2 stops25h 28m
Deal found 6/9$2,204
Wed 25/1106:40 -
2 stops25h 05m
Thu 28/106:18 -
2 stops31h 37m
Deal found 8/9$2,236
Mon 12/1019:50 -
1 stop22h 09m
Mon 19/1013:10 -
2 stops29h 55m
Deal found 6/9$2,241
Mon 12/1014:50 -
1 stop26h 19m
Mon 19/1020:34 -
1 stop37h 56m
Deal found 6/9$2,250
Mon 23/1113:20 -
1 stop19h 03m
Mon 30/1118:51 -
2 stops27h 04m
Deal found 8/9$2,252
Sun 25/1019:55 -
1 stop23h 04m
Sat 7/1121:18 -
1 stop36h 27m
Deal found 8/9$2,262

Find flight deals to Boulder

Return from

$1,990

One-way from

$870

Popular in

July

Cheapest in

February

Average price

$2,677
24/11-29/11
  • 24/11-29/11
  • 4 total stops
  • 51h 20m total
  • Auckland to Denver
Search Deals
31/10-31/12
  • 31/10-31/12
  • 3 total stops
  • 39h 09m total
  • Auckland to Boulder
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($280 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($41 potential savings vs. average return price).
Search Deals
Average for return flights in September 2026
Search Deals

Cheapflights Fare Finder

 
Use the filters below to find and compare flights to Boulder that are best for you.

Fly from

Route

Departure

Return

Price

Cheapest return flight

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Sat 6/3

14:50-10:39

3 stops39h 49m

Denver Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

$1,051

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Fri 9/10

17:15-16:59

3 stops42h 44m

Denver Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

$1,065

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Tue 6/10

19:50-08:40

1 stop31h 50m

Denver Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

$1,092

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Sat 20/2

14:45-23:00

1 stop28h 15m

Denver Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

$1,315

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Fri 15/1

14:45-23:00

1 stop28h 15m

Denver Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

$1,316
Fastest return journey

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Sat 6/3

19:00-22:01

1 stop23h 01m

Denver Intl

Wed 31/12

00:00-19:00

Nonstop0h 00m

$1,322

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Mon 12/10

14:50-22:09

1 stop26h 19m

Denver Intl

Mon 19/10

20:34-05:30

1 stop37h 56m

$2,250

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Mon 23/11

07:30-11:45

2 stops24h 15m

Denver Intl

Mon 30/11

16:25-14:05

2 stops25h 40m

$2,255

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Sun 25/10

19:55-23:59

1 stop23h 04m

Denver Intl

Sat 7/11

21:18-05:45

1 stop36h 27m

$2,262

AucklandDenver

AKL Auckland Intl - DEN Denver Intl

AKLDEN

Auckland Intl

Sun 25/10

19:50-23:30

1 stop22h 40m

Denver Intl

Sat 7/11

19:20-17:45

2 stops26h 25m

$2,311

Flights are sorted by cheapest return flights first.

Deals found on 10/9

Showing 1-10 of 14 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

Cheapflights Insights

Everything you need to know about your flight to Boulder

How long is the flight to Boulder?

On average, a flight from Auckland to Boulder takes 17 hours 35 minutes. Flights to Boulder from other popular cities in New Zealand 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 Auckland to Boulder are Air New Zealand and Qantas Airways.

Air New Zealand
Air New Zealand
From $1,866
Qantas Airways
Qantas Airways
From $1,885

What are the cheapest airlines that fly to Boulder?

The cheapest airlines flying from Auckland to Boulder are Air New Zealand and Qantas Airways.

Rainfall in Boulder 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

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

Read through reviews of airlines serving the United States, such as Air New Zealand and Qantas Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Food

7.5

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed
Air New Zealand
8.0
Very Good
669 reviews
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Food

7.5

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed
Qantas Airways
7.5
Good
1,091 reviews
Air New Zealand
8.0
Very Good
669 reviews
Check prices

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

Entertainment

7.4

Food

7.5

Reviews

1 / 20
6.0
Good

Anonymous,Aug 2026

FLL - IAH

All good. Problem was delay caused by weather in Houston creating anxiety about my AirNZ connection. Nothing that United could do about that, and in fairness th captain kept us very well informed

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, Air New Zealand 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 $308, however they can be found for as little as $308.

  • Where does the fastest flight to Boulder depart from?

    For those looking to save time traveling to Boulder, Auckland Intl offers the quickest one-way flight (17 hours 35 minutes).

  • Does Denver Intl have rental cars?

    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

Browse thousands of different options on Cheapflights for your next trip

Search flights to Boulder by cabin class

First Class flights to Boulder
Business Class flights to Boulder
Prem Economy Class flights to Boulder
Economy Class flights to Boulder

Fly with Cheapflights

How does Cheapflights help users find flights to Boulder?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights to Boulder. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets to Boulder?

Cheapflights helps you find that perfect flight to Boulder by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights to Boulder with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights to Boulder, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights to Boulder become cheaper?

Yes! Start tracking prices for Boulder flights today and get alerted when prices change. To subscribe and begin receiving alerts, click the bell icon next to the flight deals above and provide your email address.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.