How long is the flight from Colorado to Australia?

Flight times from Colorado to Australia vary, but if you’re flying out of Denver and flying into Sydney (one of the most popular routes), then the duration is 23h on average. Another popular route from Colorado to Australia is flying from Aspen to Sydney, which will take roughly 24h 48m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to Australia?

United Airlines, Qantas Airways and Air New Zealand are the top three most popular airlines that fly to Australia from Colorado according to our data. United Airlines is the first choice among our users, with 30% of people opting to fly with this airline when traveling to Australia. Keep in mind that there are 7 different airlines that fly to Australia on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Colorado to Australia?

China Eastern, Air Canada, and China Southern are the most popular carriers operating from Colorado to Australia

When did momondo last update prices for flights from Colorado to Australia?

Prices for flights from Colorado to Australia refresh daily.

How many operators does momondo search for flights from Colorado to Australia?

As of August 2026, there are 7 operators available to choose from for flights from Colorado to Australia.

How old do you have to be to fly from Colorado to Australia?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Australia.

What documentation or ID do you need to fly to Australia?

The necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$544 Cheap Flights from Colorado to Australia in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Colorado to Australia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

1:10 pm - 12:05 pmDEN Denver Intl-MEL Melbourne

30h 55m2 stops Los Angeles Los Angeles Nadi

2:20 pm - 12:25 amMEL Melbourne-DEN Denver Intl

27h 05m2 stops Nadi Los Angeles Los Angeles

$965Multiple Airlines

Sat, Sep 26 - Thu, Oct 8

6:30 am - 10:05 pmDEN Denver Intl-SYD Sydney Kingsford Smith

46h 35m2 stops Los Angeles Los Angeles Nadi

6:00 am - 12:25 amSYD Sydney Kingsford Smith-DEN Denver Intl

36h 25m2 stops Nadi Los Angeles Los Angeles

$976Multiple Airlines

Sat, Oct 24 - Mon, Nov 9

1:30 pm - 7:00 amDEN Denver Intl-BNE Brisbane

24h 30m2 stops Los Angeles Los Angeles Auckland Intl

8:20 am - 5:56 pmBNE Brisbane-DEN Denver Intl

26h 36m2 stops Auckland Intl Los Angeles Los Angeles

$1,133Air New Zealand

Mon, Nov 2 - Mon, Nov 16

5:50 pm - 7:00 amDEN Denver Intl-BNE Brisbane

44h 10m2 stops Los Angeles Los Angeles Auckland Intl

11:15 am - 5:56 pmBNE Brisbane-DEN Denver Intl

23h 41m2 stops Auckland Intl Los Angeles Los Angeles

$1,133Air New Zealand

Tue, Nov 3 - Tue, Nov 17

2:15 pm - 7:00 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

24h 45m2 stops Denver Intl Los Angeles Los Angeles

9:30 am - 1:34 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

20h 04m1 stop Los Angeles Los Angeles

$1,308United Airlines

Tue, Sep 8 - Tue, Sep 22

9:40 am - 6:55 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

29h 15m1 stop San Francisco

10:20 am - 7:52 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

25h 32m1 stop San Francisco

$1,308United Airlines

Tue, Sep 8 - Tue, Sep 22

7:50 pm - 7:05 amDEN Denver Intl-BNE Brisbane

19h 15m1 stop Vancouver Intl

10:00 am - 8:47 amBNE Brisbane-DEN Denver Intl

38h 47m2 stops Vancouver Intl Edmonton

$1,418Air Canada

Mon, Oct 5 - Mon, Oct 19

7:51 am - 7:05 amDEN Denver Intl-BNE Brisbane

31h 14m1 stop Vancouver Intl

10:00 am - 8:22 amBNE Brisbane-DEN Denver Intl

38h 22m2 stops Vancouver Intl Las Vegas Harry Reid Intl

$1,428Air Canada

Wed, Aug 19 - Mon, Aug 24

7:55 pm - 6:50 amDEN Denver Intl-SYD Sydney Kingsford Smith

18h 55m1 stop Los Angeles Los Angeles

9:15 am - 6:22 pmSYD Sydney Kingsford Smith-DEN Denver Intl

25h 07m1 stop Los Angeles Los Angeles

$1,509Delta

Mon, Aug 24 - Sun, Sep 6

7:55 pm - 6:50 amDEN Denver Intl-SYD Sydney Kingsford Smith

18h 55m1 stop Los Angeles Los Angeles

9:15 am - 6:11 pmSYD Sydney Kingsford Smith-DEN Denver Intl

24h 56m1 stop Los Angeles Los Angeles

$1,509Delta

Mon, Aug 24 - Mon, Sep 21

Cheap last minute flights

Enter your travel dates to find the best prices.

7:12 pm - 7:00 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

19h 48m1 stop Los Angeles Los Angeles

9:30 am - 8:26 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

26h 56m1 stop Los Angeles Los Angeles

$1,288United Airlines

Thu, Aug 13 - Mon, Aug 24

2:15 pm - 6:55 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

24h 40m2 stops Denver Intl San Francisco

9:30 am - 1:34 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

20h 04m1 stop Los Angeles Los Angeles

$1,292United Airlines

Thu, Aug 13 - Mon, Aug 24

2:15 pm - 6:55 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

24h 40m2 stops Denver Intl San Francisco

9:30 am - 1:34 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

20h 04m1 stop Los Angeles Los Angeles

$1,293United Airlines

Thu, Aug 13 - Mon, Aug 24

10:39 pm - 7:30 amDEN Denver Intl-SYD Sydney Kingsford Smith

40h 51m1 stop Los Angeles Los Angeles

1:15 pm - 9:16 pmSYD Sydney Kingsford Smith-DEN Denver Intl

24h 01m2 stops Nadi San Francisco

$1,328Multiple Airlines

Mon, Aug 10 - Wed, Aug 19

7:00 am - 7:05 amDEN Denver Intl-SYD Sydney Kingsford Smith

32h 05m1 stop Los Angeles Los Angeles

9:10 am - 1:13 pmSYD Sydney Kingsford Smith-DEN Denver Intl

20h 03m1 stop Los Angeles Los Angeles

$1,346Multiple Airlines

Mon, Aug 10 - Wed, Aug 19

12:25 pm - 8:45 amDEN Denver Intl-SYD Sydney Kingsford Smith

28h 20m2 stops San Francisco Auckland Intl

11:55 am - 6:19 amSYD Sydney Kingsford Smith-DEN Denver Intl

34h 24m2 stops Auckland Intl Honolulu

$1,452Air New Zealand

Mon, Aug 10 - Wed, Aug 19

9:20 pm - 9:35 pmDEN Denver Intl-MEL Melbourne

56h 15m2 stops Los Angeles Los Angeles Auckland Intl

8:35 am - 10:18 pmMEL Melbourne-DEN Denver Intl

29h 43m2 stops Auckland Intl Los Angeles Los Angeles

$1,494Air New Zealand

Mon, Aug 10 - Tue, Aug 25

7:45 pm - 10:20 pmDEN Denver Intl-PER Perth

36h 35m2 stops Vancouver Intl Brisbane

10:40 pm - 2:51 pmPER Perth-DEN Denver Intl

30h 11m2 stops Brisbane Vancouver Intl

$1,831Air Canada

Wed, Aug 12 - Wed, Sep 9

6:26 pm - 6:45 amDEN Denver Intl-MEL Melbourne

20h 19m1 stop Los Angeles Los Angeles

9:45 am - 5:56 pmMEL Melbourne-DEN Denver Intl

24h 11m1 stop Los Angeles Los Angeles

$1,984Qantas Airways

Mon, Aug 10 - Tue, Aug 25

6:26 pm - 6:45 amDEN Denver Intl-MEL Melbourne

20h 19m1 stop Los Angeles Los Angeles

9:45 am - 5:56 pmMEL Melbourne-DEN Denver Intl

24h 11m1 stop Los Angeles Los Angeles

$1,985Qantas Airways

Mon, Aug 10 - Tue, Aug 25

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United Airlines flights from Colorado to Australia

Our best United Airlines deals on Colorado to Australia flight tickets

United Airlines

Aug 13

ASE7:12 pmAspen Pitkin County

19h 48m

1 stop

SYD7:00 amSydney Kingsford Smith

Aug 24

SYD9:30 amSydney Kingsford Smith

26h 56m

1 stop

ASE8:26 pmAspen Pitkin County

$1,288

United Airlines

Aug 13

ASE7:30 amAspen Pitkin County

31h 30m

2 stops

SYD7:00 amSydney Kingsford Smith

Aug 24

SYD10:20 amSydney Kingsford Smith

40h 46m

2 stops

ASE11:06 amAspen Pitkin County

$1,292

United Airlines

Aug 13

ASE2:15 pmAspen Pitkin County

24h 40m

2 stops

SYD6:55 amSydney Kingsford Smith

Aug 24

SYD9:30 amSydney Kingsford Smith

20h 04m

1 stop

ASE1:34 pmAspen Pitkin County

$1,293

Air New Zealand flights from Colorado to Australia

Our best Air New Zealand deals on Colorado to Australia flight tickets

Air New Zealand

Nov 2

DEN1:30 pmDenver Intl

24h 30m

2 stops

BNE7:00 amBrisbane

Nov 16

BNE8:20 amBrisbane

26h 36m

2 stops

DEN5:56 pmDenver Intl

$1,133

Air New Zealand

Oct 21

DEN4:15 pmDenver Intl

23h 30m

2 stops

SYD8:45 amSydney Kingsford Smith

Nov 4

SYD9:55 amSydney Kingsford Smith

26h 01m

2 stops

DEN5:56 pmDenver Intl

$1,135

Air New Zealand

Aug 19

DEN5:45 pmDenver Intl

23h 00m

2 stops

SYD8:45 amSydney Kingsford Smith

Sep 9

SYD9:55 amSydney Kingsford Smith

28h 23m

2 stops

DEN10:18 pmDenver Intl

$1,136

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverMelbourne

DEN Denver Intl - MEL Melbourne

DENMEL

Denver Intl

Sat 9/26

1:10 pm-12:05 pm

2 stops30h 55m

Melbourne

Thu 10/8

2:20 pm-12:25 am

2 stops27h 05m

$965

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 10/24

6:30 am-10:05 pm

2 stops46h 35m

Sydney Kingsford Smith

Mon 11/9

6:00 am-12:25 am

2 stops36h 25m

$976

DenverBrisbane

DEN Denver Intl - BNE Brisbane

DENBNE

Denver Intl

Mon 11/2

1:30 pm-7:00 am

2 stops24h 30m

Brisbane

Mon 11/16

8:20 am-5:56 pm

2 stops26h 36m

$1,133

DenverBrisbane

DEN Denver Intl - BNE Brisbane

DENBNE

Denver Intl

Tue 11/3

5:50 pm-7:00 am

2 stops44h 10m

Brisbane

Tue 11/17

11:15 am-5:56 pm

2 stops23h 41m

$1,133

AspenSydney

ASE Aspen Pitkin County - SYD Sydney Kingsford Smith

ASESYD

Aspen Pitkin County

Tue 9/8

2:15 pm-7:00 am

2 stops24h 45m

Sydney Kingsford Smith

Tue 9/22

9:30 am-1:34 pm

1 stop20h 04m

$1,308

AspenSydney

ASE Aspen Pitkin County - SYD Sydney Kingsford Smith

ASESYD

Aspen Pitkin County

Tue 9/8

9:40 am-6:55 am

1 stop29h 15m

Sydney Kingsford Smith

Tue 9/22

10:20 am-7:52 pm

1 stop25h 32m

$1,308

DenverBrisbane

DEN Denver Intl - BNE Brisbane

DENBNE

Denver Intl

Mon 10/5

7:50 pm-7:05 am

1 stop19h 15m

Brisbane

Mon 10/19

10:00 am-8:47 am

2 stops38h 47m

$1,418

DenverBrisbane

DEN Denver Intl - BNE Brisbane

DENBNE

Denver Intl

Wed 8/19

7:51 am-7:05 am

1 stop31h 14m

Brisbane

Mon 8/24

10:00 am-8:22 am

2 stops38h 22m

$1,428

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 8/24

7:55 pm-6:50 am

1 stop18h 55m

Sydney Kingsford Smith

Sun 9/6

9:15 am-6:22 pm

1 stop25h 07m

$1,509

Quickest round-trip

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 8/24

7:55 pm-6:50 am

1 stop18h 55m

Sydney Kingsford Smith

Mon 9/21

9:15 am-6:11 pm

1 stop24h 56m

$1,509

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Colorado to Australia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Australia?

The month of April is, on average, the cheapest month to fly to Australia from Colorado, with most prices found around $1,136. If you aren’t able to travel during the month of April, then book flights to Australia from Colorado during May instead. Flights to Australia in May, while not as cheap as those in April, still average around $1,221.

How far in advance should I book a flight from Colorado to Australia?

You are more likely to see cheaper flights to Australia from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Australia for around $1,363 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Australia from Colorado for as low as $1,068 on momondo.

Can stopping save me money on Colorado to Australia flights?

You could potentially save up to 1% on your flight if you consider stops on a Colorado to Australia flight.

Cheap Colorado to Australia flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to Australia

Fastest flight time	23h 00m
Direct flights	None

The fastest flight from Colorado to Australia takes 23h 00m

There are no direct flights from Colorado to Australia. There are no popular flight routes from Colorado to Australia.

Search flight deals

Frequently asked questions about flying from Colorado to Australia

When did momondo last update prices for flights from Colorado to Australia?
Prices for flights from Colorado to Australia refresh daily.
How many operators does momondo search for flights from Colorado to Australia?
As of August 2026, there are 7 operators available to choose from for flights from Colorado to Australia.
How old do you have to be to fly from Colorado to Australia?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Australia.
What documentation or ID do you need to fly to Australia?
The necessary travel and health documents for your Australia trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Colorado to Australia

Compare and see reviews for airlines that fly from Colorado to Australia with momondo

Airline	Rating	Free Cancellation	Price
Delta	PriceFrom $117	Free Cancellation	Rating 7.8 8,500 reviews	Search Delta flights
Fiji Airways	PriceFrom $682	Free Cancellation	Rating 8.0 252 reviews	Search Fiji Airways flights
Air Canada	PriceFrom $827	Free Cancellation	Rating 7.1 11,455 reviews	Search Air Canada flights
Qantas Airways	PriceFrom $849	Free Cancellation	Rating 7.5 1,079 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $853	Free Cancellation	Rating 7.4 10,089 reviews	Search United Airlines flights
American Airlines	PriceFrom $895	Free Cancellation	Rating 7.1 11,894 reviews	Search American Airlines flights
Air New Zealand	PriceFrom $946	Free Cancellation	Rating 8.0 659 reviews	Search Air New Zealand flights

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Australia?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Colorado to Australia for you.

Can I find flights from Colorado to Australia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Australia from Colorado with this policy.

How can momondo help me find flights from Colorado to Australia?

Once all potential Colorado to Australia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Colorado to Australia right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Colorado to Australia now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Australia and let you know when they change.