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$449+ Cheap flights from Colorado to Australia

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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
oct. 17 — oct. 241
vie. 10/17
vie. 10/24
1 adult, Economy
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Cheap flight deals from Colorado to Australia

Keep the following information in mind while searching for Colorado to Australia flight deals. Data was last updated septiembre 17, 2025.

Round-trip from

$1,015
(Alaska Airlines)

One-way from

$449
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$1,034
From Colorado to Australia
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One-way flight from Colorado to Australia
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Highest demand for flights based on searches. 17% potential increase in price ($218 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Colorado to Australia

Cheapest flights from Colorado to Australia
Explore the most affordable flight options available from Colorado to Australia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on septiembre 17, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/58:02 pmDEN - SYD
2 stops29h 43mAlaska Airlines
dom. 11/99:40 pmSYD - DEN
1 stop35h 01mAlaska Airlines
Deal found 9/15$1,015
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/48:02 pmDEN - SYD
2 stops29h 43mAlaska Airlines
dom. 11/169:40 pmSYD - DEN
2 stops35h 01mAlaska Airlines
Deal found 9/16$1,016
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/226:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
sáb. 11/19:40 pmSYD - DEN
2 stops32h 47mAlaska Airlines
Deal found 9/15$1,032
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/308:02 pmDEN - SYD
2 stops30h 43mAlaska Airlines
mar. 11/189:40 pmSYD - DEN
2 stops38h 10mAlaska Airlines
Deal found 9/16$1,033
This Alaska Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 11/58:02 pmDEN - SYD
2 stops29h 43mAlaska Airlines
jue. 11/209:40 pmSYD - DEN
1 stop32h 14mAlaska Airlines
Deal found 9/17$1,038
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/226:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
vie. 10/319:40 pmSYD - DEN
2 stops37h 10mAlaska Airlines
Deal found 9/15$1,041
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/317:00 amDEN - SYD
2 stops43h 45mAlaska Airlines
dom. 11/169:40 pmSYD - DEN
2 stops35h 01mAlaska Airlines
Deal found 9/16$1,042
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/48:02 pmDEN - SYD
2 stops29h 43mAlaska Airlines
jue. 11/209:40 pmSYD - DEN
2 stops44h 21mAlaska Airlines
Deal found 9/16$1,045
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/226:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
mar. 10/289:40 pmSYD - DEN
2 stops34h 01mAlaska Airlines
Deal found 9/15$1,048
This Alaska Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/166:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
sáb. 10/259:40 pmSYD - DEN
2 stops31h 47mAlaska Airlines
Deal found 9/15$1,049
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/308:02 pmDEN - SYD
2 stops30h 43mAlaska Airlines
sáb. 11/159:40 pmSYD - DEN
2 stops32h 47mAlaska Airlines
Deal found 9/16$1,050
This Alaska Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 10/317:00 amDEN - SYD
2 stops43h 45mAlaska Airlines
jue. 11/209:40 pmSYD - DEN
2 stops44h 21mAlaska Airlines
Deal found 9/16$1,054

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Australia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 17, 2025.
Use the filters below to find and compare flights from Colorado to Australia that are best for you.

Fly from

Colorado

Fly to

Australia

Route

Depart

Return

Price

DenverSydney

DEN - SYD

DENSYD

Denver Intl

mar. 11/4

8:02 pm-7:45 pm

2 stops29h 43m

Sydney Kingsford Smith

dom. 11/16

9:40 pm-2:41 pm

2 stops35h 01m

$1,016

DenverSydney

DEN - SYD

DENSYD

Denver Intl

jue. 10/30

8:02 pm-7:45 pm

2 stops30h 43m

Sydney Kingsford Smith

jue. 11/20

9:40 pm-12:01 am

2 stops44h 21m

$1,062

DenverSydney

DEN - SYD

DENSYD

Denver Intl

mar. 11/4

8:02 pm-7:45 pm

2 stops29h 43m

Sydney Kingsford Smith

vie. 11/21

9:40 pm-10:40 pm

2 stops43h 00m

$1,076

DenverSydney

DEN - SYD

DENSYD

Denver Intl

jue. 10/30

3:37 pm-7:45 pm

2 stops35h 08m

Sydney Kingsford Smith

jue. 11/6

9:40 pm-2:41 pm

2 stops35h 01m

$1,118

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

lun. 10/13

6:00 am-7:45 am

2 stops33h 45m

Brisbane

lun. 10/20

9:00 am-7:40 pm

2 stops26h 40m

$1,178

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

jue. 11/6

11:31 am-9:55 am

2 stops29h 24m

Brisbane

lun. 11/17

11:10 am-5:58 pm

2 stops23h 48m

$1,215

DenverCairns

DEN - CNS

DENCNS

Denver Intl

sáb. 10/25

5:04 pm-11:40 am

2 stops26h 36m

Cairns

sáb. 11/1

12:35 pm-7:26 pm

2 stops22h 51m

$1,234

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

vie. 2/13

7:49 am-7:00 am

2 stops30h 11m

Brisbane

dom. 2/22

11:10 am-7:37 pm

2 stops25h 27m

$1,257

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

lun. 10/20

3:46 pm-7:45 am

2 stops23h 59m

Brisbane

jue. 11/20

8:20 am-5:58 pm

2 stops26h 38m

$1,260

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

jue. 11/13

12:01 pm-8:30 am

1 stop26h 29m

Sydney Kingsford Smith

lun. 11/17

10:40 am-12:22 pm

1 stop19h 42m

$1,282

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 60 results
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Best time to book a flight from Colorado to Australia

Have a flexible travel schedule? Discover the best time to fly to Australia from Colorado with our price prediction graph.
Estimated round-trip 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 from Colorado to Australia

What is the cheapest month to book a flight from Colorado to Australia?

Currently, March is the cheapest month in which you can book a flight from Colorado to Australia (average of $1,032). Flying from Colorado to Australia in December is currently the most expensive (average of $1,627). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CO to AU?

Find hourly flight availability from Colorado to Australia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated septiembre 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Australia as you normally would.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Australia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Colorado to Australia?

    For as low as $1,282, Alaska Airlines can have you in Australia from Colorado in 26h 29m. The distance from Colorado to Australia is about 8223 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Colorado to Australia that include hotel bookings?

    Yes. In addition to deals on Colorado to Australia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado to Australia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado to Australia.

  • Can I find deals for business class flights from Colorado to Australia?

    Yes. Cheapflights offers flight deals from Colorado to Australia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado to Australia?

    Currently, March is the cheapest month in which you can book a flight from Colorado to Australia (average of $1,032). Flying from Colorado to Australia in December is currently the most expensive (average of $1,627). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 8 airlines flying from Colorado to Australia

Discover the top 8 airlines that operate flights from Colorado to Australia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated septiembre 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$645Average$1,268FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$695Average$994FlexibilityNo cancel feeOn-time71%
DeltaCheapest$698Average$1,367FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
Air New ZealandCheapest$834Average$1,299FlexibilityNo cancel feeOn-time78%
Air CanadaCheapest$962Average$1,269FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,157Average$1,544FlexibilityNo cancel feeOn-time69%
Fiji AirwaysCheapest$1,159Average$1,283FlexibilityNo cancel feeOn-time74%

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