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$750+ 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 26/5. Fares are subject to change and may not be available on all flights or dates of travel.
— DEN
28 May — 4 Jun1
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 28 April 2026.

Thu 4/615:15
AKL
-
DEN
3 stops30h 10m
Multiple Airlines
Thu 11/612:32
DEN
-
AKL
2 stops30h 13m
Multiple Airlines
Deal found 28/4$1,939
Tue 2/615:15
AKL
-
DEN
1 stop39h 57m
Multiple Airlines
Tue 9/622:39
DEN
-
AKL
2 stops44h 06m
Multiple Airlines
Deal found 28/4$2,003
Tue 2/615:15
AKL
-
DEN
1 stop39h 57m
Multiple Airlines
Thu 11/612:32
DEN
-
AKL
2 stops30h 13m
Multiple Airlines
Deal found 28/4$2,061
Tue 2/615:15
AKL
-
DEN
1 stop39h 57m
Multiple Airlines
Fri 12/612:32
DEN
-
AKL
2 stops40h 43m
Multiple Airlines
Deal found 28/4$2,083
Sun 3/515:35
AKL
-
DEN
2 stops20h 41m
Multiple Airlines
Mon 4/506:00
DEN
-
AKL
2 stops36h 45m
Multiple Airlines
Deal found 27/4$2,141
Sun 3/515:35
AKL
-
DEN
2 stops20h 41m
Multiple Airlines
Sun 10/507:00
DEN
-
AKL
2 stops35h 45m
Multiple Airlines
Deal found 27/4$2,144
Tue 2/615:15
AKL
-
DEN
1 stop39h 57m
Multiple Airlines
Sat 13/612:32
DEN
-
AKL
2 stops30h 48m
Multiple Airlines
Deal found 28/4$2,185
Fri 5/614:00
AKL
-
DEN
2 stops39h 01m
Fiji Airways
Thu 11/612:39
DEN
-
AKL
2 stops30h 06m
Fiji Airways
Deal found 28/4$2,197
Thu 4/615:15
AKL
-
DEN
2 stops22h 51m
Multiple Airlines
Sun 14/622:39
DEN
-
AKL
2 stops44h 41m
Multiple Airlines
Deal found 28/4$2,210
Tue 2/615:15
AKL
-
DEN
1 stop39h 57m
Multiple Airlines
Sun 14/612:32
DEN
-
AKL
2 stops34h 13m
Multiple Airlines
Deal found 28/4$2,212
Fri 5/620:15
AKL
-
DEN
1 stop17h 51m
Multiple Airlines
Wed 10/622:39
DEN
-
AKL
2 stops44h 06m
Multiple Airlines
Deal found 28/4$2,249
Mon 1/619:50
AKL
-
DEN
1 stop22h 08m
Multiple Airlines
Wed 10/622:39
DEN
-
AKL
2 stops44h 06m
Multiple Airlines
Deal found 28/4$2,266

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 134,765 searches and data was last updated on 28 April 2026.

Return from

$1,939

One-way from

$750

Popular in

April

Cheapest in

February

Average price

$2,727
4/6-11/6
  • 4/6-11/6
  • 5 total stops
  • 60h 23m total
  • Auckland to Denver
Search Deals
26/5
  • 26/5
  • 2 total stops
  • 38h 04m total
  • Auckland to Boulder
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($135 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($51 potential savings vs. average return price).
Search Deals
Average for return flights in April 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 134,765 searches and data was last updated on 28 April 2026.
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
Fastest return journey

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Sat 15/8

19:50-20:09

1 stop18h 19m

Denver Intl

Mon 24/8

16:20-05:30

1 stop19h 10m

$2,556

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Thu 14/5

13:25-20:03

2 stops24h 38m

Denver Intl

Sun 17/5

12:41-16:50

2 stops34h 09m

$2,561

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Fri 22/5

06:00-15:32

2 stops27h 32m

Denver Intl

Mon 8/6

15:11-12:15

2 stops27h 04m

$2,594

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Fri 22/5

13:25-23:43

3 stops28h 18m

Denver Intl

Mon 8/6

15:11-12:15

2 stops27h 04m

$2,594

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Sat 15/8

13:25-23:42

3 stops28h 17m

Denver Intl

Mon 24/8

15:00-14:05

3 stops29h 05m

$2,603

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Thu 14/5

13:50-00:59

1 stop29h 09m

Denver Intl

Sun 17/5

06:00-06:00

1 stop30h 00m

$2,630
Cheapest one-way

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Sat 30/5

14:00-00:38

2 stops28h 38m

$1,050
Fastest single journey

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Sat 6/6

08:20-17:20

2 stops27h 00m

$1,326

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Sat 6/6

13:25-22:44

3 stops27h 19m

$1,326

AucklandDenver

AKL - DEN

AKLDEN

Auckland Intl

Sun 13/9

08:20-08:12

3 stops41h 52m

$1,338

Flights are sorted by cheapest return flights first.

Deals found on 26/4

Sorted by cheapest first

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

How long is the flight to Boulder?

On average, a flight from Auckland to Boulder takes 20 hours 41 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, Qantas Airways and Air Canada.

Air New Zealand
Air New Zealand
From $1,849
Qantas Airways
Qantas Airways
From $1,406
Air Canada
Air Canada
From $1,337
United Airlines
United Airlines
From $1,888

What are the cheapest airlines that fly to Boulder?

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

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 28 April 2026.
Read through reviews of airlines serving the United States, such as Air New Zealand,Qantas Airways, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air New Zealand
8.0
Very Good
638 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Qantas Airways
7.5
Good
1,028 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
United Airlines
7.4
Good
9,675 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding
Air Canada
7.1
Good
10,976 reviews
Air New Zealand
8.0
Very Good
638 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

7.9

Food

7.4

Entertainment

7.4

Boarding

8.2

Reviews

1 / 20
6.0
Good

Anonymous,Mar 2026

SIN - AKL

We were stuck on tarmac for an hour after boarding

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 Canada is rated the highest out of the airlines that fly to Boulder.

  • 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 (20 hours 41 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

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