What airlines fly to Australia?

United Airlines, Qantas Airways and Air Canada 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 31% 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.

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 18h 39m on average. Another popular route from Colorado to Australia is flying from Aspen to Sydney, which will take roughly 19h 48m. Keep in mind that layovers or delays could extend your travel time.

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

Cathay Pacific, United Airlines, and Qantas Airways 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 September 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.

$494 Cheap Flights from Colorado to Australia in 2026/27

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.

9:00 am - 12:45 pmDEN Denver Intl-MEL Melbourne

34h 45m2 stops Los Angeles Los Angeles Nadi

1:35 pm - 6:10 pmMEL Melbourne-DEN Denver Intl

46h 35m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl

$982Multiple Airlines

Mon, Oct 26 - Mon, Nov 9

9:00 am - 12:35 pmDEN Denver Intl-SYD Sydney Kingsford Smith

34h 35m2 stops Los Angeles Los Angeles Nadi

2:00 pm - 6:10 pmSYD Sydney Kingsford Smith-DEN Denver Intl

46h 10m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl

$1,021Multiple Airlines

Mon, Oct 26 - Mon, Nov 9

7:45 am - 10:35 amDEN Denver Intl-SYD Sydney Kingsford Smith

32h 50m2 stops San Francisco Auckland Intl

11:50 am - 6:18 pmSYD Sydney Kingsford Smith-DEN Denver Intl

24h 28m2 stops Auckland Intl San Francisco

$1,138Air New Zealand

Mon, Feb 1 - Wed, Feb 10

5:00 am - 8:35 amDEN Denver Intl-SYD Sydney Kingsford Smith

33h 35m2 stops Houston George Bush Intcntl Auckland Intl

7:25 pm - 5:50 pmSYD Sydney Kingsford Smith-DEN Denver Intl

39h 25m2 stops Auckland Intl Los Angeles Los Angeles

$1,157Air New Zealand

Tue, Feb 23 - Tue, Mar 16

7:00 pm - 1:55 pmDEN Denver Intl-ADL Adelaide

25h 25m2 stops Vancouver Intl Sydney Kingsford Smith

6:10 am - 12:29 pmADL Adelaide-DEN Denver Intl

22h 49m2 stops Brisbane Vancouver Intl

$1,328Air Canada

Mon, Mar 1 - Wed, Mar 31

7:34 pm - 6:25 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

40h 51m1 stop Los Angeles Los Angeles

2:05 pm - 4:26 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

20h 21m1 stop Dallas/Fort Worth

$1,364Qantas Airways

Sat, Feb 13 - Tue, Feb 23

3:53 pm - 8:45 amDEN Denver Intl-BNE Brisbane

23h 52m1 stop Vancouver Intl

10:45 am - 12:20 pmBNE Brisbane-DEN Denver Intl

18h 35m1 stop Vancouver Intl

$1,392Air Canada

Mon, Nov 2 - Mon, Nov 9

2:17 pm - 8:40 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

25h 23m1 stop Los Angeles Los Angeles

11:20 am - 1:36 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

20h 16m1 stop Los Angeles Los Angeles

$1,409United Airlines

Mon, Oct 26 - Mon, Nov 2

3:14 pm - 5:00 amDEN Denver Intl-MEL Melbourne

20h 46m1 stop Dallas/Fort Worth

12:00 pm - 2:18 pmMEL Melbourne-DEN Denver Intl

20h 18m1 stop Dallas/Fort Worth

$1,505Qantas Airways

Sat, Oct 24 - Sat, Nov 7

7:12 pm - 8:00 amASE Aspen Pitkin County-SYD Sydney Kingsford Smith

19h 48m1 stop Los Angeles Los Angeles

10:30 am - 1:36 pmSYD Sydney Kingsford Smith-ASE Aspen Pitkin County

20h 06m1 stop Los Angeles Los Angeles

$1,529United Airlines

Wed, Oct 21 - Sun, Oct 25

Cheap last minute flights

Enter your travel dates to find the best prices.

1:10 pm - 11:50 amDEN Denver Intl-SYD Sydney Kingsford Smith

30h 40m2 stops Los Angeles Los Angeles Nadi

2:00 pm - 11:49 pmSYD Sydney Kingsford Smith-DEN Denver Intl

27h 49m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl

$1,044Multiple Airlines

Sat, Sep 26 - Tue, Nov 3

1:18 pm - 11:50 amDEN Denver Intl-SYD Sydney Kingsford Smith

30h 32m3 stops Phoenix Sky Harbor Intl Los Angeles Los Angeles Nadi

2:00 pm - 11:49 pmSYD Sydney Kingsford Smith-DEN Denver Intl

27h 49m3 stops Nadi Los Angeles Los Angeles Las Vegas Harry Reid Intl

$1,073Multiple Airlines

Sat, Sep 26 - Tue, Nov 3

12:25 pm - 6:50 amDEN Denver Intl-SYD Sydney Kingsford Smith

26h 25m1 stop Los Angeles Los Angeles

10:15 am - 6:09 pmSYD Sydney Kingsford Smith-DEN Denver Intl

24h 54m1 stop Los Angeles Los Angeles

$1,510Delta

Mon, Sep 28 - Wed, Oct 21

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

18h 55m1 stop Los Angeles Los Angeles

10:15 am - 11:26 amSYD Sydney Kingsford Smith-DEN Denver Intl

18h 11m1 stop Los Angeles Los Angeles

$1,510Delta

Wed, Sep 23 - Tue, Oct 13

5:40 pm - 7:00 amDEN Denver Intl-SYD Sydney Kingsford Smith

21h 20m1 stop Los Angeles Los Angeles

11:55 am - 10:09 pmSYD Sydney Kingsford Smith-DEN Denver Intl

27h 14m2 stops Auckland Intl San Francisco

$1,789Air New Zealand

Mon, Sep 28 - Wed, Oct 21

11:06 am - 7:05 amDEN Denver Intl-SYD Sydney Kingsford Smith

27h 59m1 stop Los Angeles Los Angeles

1:00 pm - 9:47 pmSYD Sydney Kingsford Smith-DEN Denver Intl

25h 47m1 stop Dallas/Fort Worth

$1,955American Airlines

Mon, Sep 28 - Wed, Oct 21

11:23 am - 7:20 amDEN Denver Intl-SYD Sydney Kingsford Smith

27h 57m2 stops Edmonton Vancouver Intl

10:20 am - 11:54 pmSYD Sydney Kingsford Smith-DEN Denver Intl

30h 34m3 stops Vancouver Intl Toronto Pearson Intl Chicago O'Hare Intl

$1,959Air Canada

Mon, Sep 28 - Wed, Oct 21

1:30 pm - 3:00 pmDEN Denver Intl-PER Perth

35h 30m2 stops Houston George Bush Intcntl Auckland Intl

5:20 pm - 5:56 pmPER Perth-DEN Denver Intl

39h 36m3 stops Melbourne Auckland Intl Los Angeles Los Angeles

$2,343Air New Zealand

Sat, Sep 26 - Sun, Nov 8

7:45 am - 7:20 amDEN Denver Intl-SYD Sydney Kingsford Smith

31h 35m3 stops Chicago O'Hare Intl Toronto Pearson Intl Vancouver Intl

10:20 am - 4:10 pmSYD Sydney Kingsford Smith-DEN Denver Intl

22h 50m2 stops Vancouver Intl San Diego

$18,617Air Canada

Mon, Sep 28 - Sat, Oct 10

12:17 pm - 7:05 amDEN Denver Intl-SYD Sydney Kingsford Smith

26h 48m2 stops Phoenix Sky Harbor Intl Los Angeles Los Angeles

12:00 pm - 10:34 pmSYD Sydney Kingsford Smith-DEN Denver Intl

26h 34m1 stop Dallas/Fort Worth

$28,755American Airlines

Wed, Sep 23 - Tue, Sep 29

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Air New Zealand flights from Colorado to Australia

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

Air New Zealand

Feb 1

DEN7:45 amDenver Intl

32h 50m

2 stops

SYD10:35 amSydney Kingsford Smith

Feb 10

SYD11:50 amSydney Kingsford Smith

24h 28m

2 stops

DEN6:18 pmDenver Intl

$1,138

Air New Zealand

Feb 23

DEN5:00 amDenver Intl

33h 35m

2 stops

SYD8:35 amSydney Kingsford Smith

Mar 16

SYD7:25 pmSydney Kingsford Smith

39h 25m

2 stops

DEN5:50 pmDenver Intl

$1,157

Air New Zealand

Oct 26

ASE2:17 pmAspen Pitkin County

25h 18m

2 stops

SYD8:35 amSydney Kingsford Smith

Nov 2

SYD9:55 amSydney Kingsford Smith

45h 41m

2 stops

ASE1:36 pmAspen Pitkin County

$1,161

United Airlines flights from Colorado to Australia

Our best United Airlines deals on Colorado to Australia flight tickets

United Airlines

Oct 26

ASE2:17 pmAspen Pitkin County

25h 23m

1 stop

SYD8:40 amSydney Kingsford Smith

Nov 2

SYD11:20 amSydney Kingsford Smith

20h 16m

1 stop

ASE1:36 pmAspen Pitkin County

$1,409

United Airlines

Oct 21

ASE7:12 pmAspen Pitkin County

19h 48m

1 stop

SYD8:00 amSydney Kingsford Smith

Oct 25

SYD10:30 amSydney Kingsford Smith

20h 06m

1 stop

ASE1:36 pmAspen Pitkin County

$1,529

United Airlines

Oct 21

ASE2:15 pmAspen Pitkin County

24h 45m

2 stops

SYD8:00 amSydney Kingsford Smith

Oct 25

SYD11:50 amSydney Kingsford Smith

23h 37m

2 stops

ASE6:27 pmAspen Pitkin County

$1,534

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverMelbourne

DEN Denver Intl - MEL Melbourne

DENMEL

Denver Intl

Mon 10/26

9:00 am-12:45 pm

2 stops34h 45m

Melbourne

Mon 11/9

1:35 pm-6:10 pm

3 stops46h 35m

$982

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 10/26

9:00 am-12:35 pm

2 stops34h 35m

Sydney Kingsford Smith

Mon 11/9

2:00 pm-6:10 pm

3 stops46h 10m

$1,021

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 2/1

7:45 am-10:35 am

2 stops32h 50m

Sydney Kingsford Smith

Wed 2/10

11:50 am-6:18 pm

2 stops24h 28m

$1,138

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 2/23

5:00 am-8:35 am

2 stops33h 35m

Sydney Kingsford Smith

Tue 3/16

7:25 pm-5:50 pm

2 stops39h 25m

$1,157

DenverAdelaide

DEN Denver Intl - ADL Adelaide

DENADL

Denver Intl

Mon 3/1

7:00 pm-1:55 pm

2 stops25h 25m

Adelaide

Wed 3/31

6:10 am-12:29 pm

2 stops22h 49m

$1,328

AspenSydney

ASE Aspen Pitkin County - SYD Sydney Kingsford Smith

ASESYD

Aspen Pitkin County

Sat 2/13

7:34 pm-6:25 am

1 stop40h 51m

Sydney Kingsford Smith

Tue 2/23

2:05 pm-4:26 pm

1 stop20h 21m

$1,364

DenverBrisbane

DEN Denver Intl - BNE Brisbane

DENBNE

Denver Intl

Mon 11/2

3:53 pm-8:45 am

1 stop23h 52m

Brisbane

Mon 11/9

10:45 am-12:20 pm

1 stop18h 35m

$1,392

AspenSydney

ASE Aspen Pitkin County - SYD Sydney Kingsford Smith

ASESYD

Aspen Pitkin County

Mon 10/26

2:17 pm-8:40 am

1 stop25h 23m

Sydney Kingsford Smith

Mon 11/2

11:20 am-1:36 pm

1 stop20h 16m

$1,409

DenverMelbourne

DEN Denver Intl - MEL Melbourne

DENMEL

Denver Intl

Sat 10/24

3:14 pm-5:00 am

1 stop20h 46m

Melbourne

Sat 11/7

12:00 pm-2:18 pm

1 stop20h 18m

$1,505

Quickest round-trip

AspenSydney

ASE Aspen Pitkin County - SYD Sydney Kingsford Smith

ASESYD

Aspen Pitkin County

Wed 10/21

7:12 pm-8:00 am

1 stop19h 48m

Sydney Kingsford Smith

Sun 10/25

10:30 am-1:36 pm

1 stop20h 06m

$1,529

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 $1,132. If you aren’t able to travel during the month of April, then book flights to Australia from Colorado during June instead. Flights to Australia in June, while not as cheap as those in April, still average around $1,204.

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 $1,367 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 $1,061 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

Best Price Found	$494
Fastest flight time	18h 39m
Direct flights	None

The best one-way flight to Australia from Colorado in the past 72 hours is $494. The best round-trip flight deal from Colorado to Australia found on momondo in the last 72 hours is $982.

The fastest flight from Colorado to Australia takes 18h 39m

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 September 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 8,595 reviews	Search Delta flights
Fiji Airways	PriceFrom $682	Free Cancellation	Rating 8.0 259 reviews	Search Fiji Airways flights
Air Canada	PriceFrom $770	Free Cancellation	Rating 7.1 11,665 reviews	Search Air Canada flights
American Airlines	PriceFrom $844	Free Cancellation	Rating 7.0 12,081 reviews	Search American Airlines flights
Qantas Airways	PriceFrom $847	Free Cancellation	Rating 7.5 1,101 reviews	Search Qantas Airways flights
United Airlines	PriceFrom $853	Free Cancellation	Rating 7.4 10,227 reviews	Search United Airlines flights
Air New Zealand	PriceFrom $1,033	Free Cancellation	Rating 8.0 669 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.