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$421+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Dec 23 — Dec 301
Tue 12/23
Tue 12/30
1 adult, Economy
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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 November 23, 2025.

This Trip.com deal was found by Cheapflights users on 11/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amDEN - SYD
2 stops36h 35mMultiple Airlines
Sun 12/72:50 pmSYD - DEN
2 stops27h 27mMultiple Airlines
Deal found 11/21$979
This Trip.com deal was found by Cheapflights users on 11/22. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/65:01 pmDEN - SYD
1 stop20h 24mMultiple Airlines
Tue 12/911:20 amSYD - DEN
2 stops26h 40mMultiple Airlines
Deal found 11/22$1,084
This Trip.com deal was found by Cheapflights users on 11/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/287:51 amDEN - SYD
1 stop29h 34mMultiple Airlines
Fri 12/511:20 amSYD - DEN
1 stop30h 57mMultiple Airlines
Deal found 11/21$1,119
This Kiwi.com deal was found by Cheapflights users on 11/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:00 amDEN - SYD
1 stop31h 25mMultiple Airlines
Wed 12/105:45 pmSYD - DEN
2 stops22h 44mMultiple Airlines
Deal found 11/21$1,161
This Trip.com deal was found by Cheapflights users on 11/21. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/18:31 amDEN - SYD
1 stop28h 54mMultiple Airlines
Sat 12/611:20 amSYD - DEN
1 stop23h 21mMultiple Airlines
Deal found 11/21$1,162
This Air Canada deal was found by Cheapflights users on 11/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/253:53 pmDEN - BNE
1 stop23h 52mAir Canada
Thu 12/2510:45 amBNE - DEN
2 stops24h 23mAir Canada
Deal found 11/23$1,192
This Trip.com deal was found by Cheapflights users on 11/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:29 pmDEN - PER
2 stops57h 26mMultiple Airlines
Tue 2/1712:25 amPER - DEN
2 stops48h 01mMultiple Airlines
Deal found 11/20$1,325
This CheapOair deal was found by Cheapflights users on 11/23. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/259:53 amDEN - BNE
3 stops37h 12mMultiple Airlines
Thu 12/2510:45 amBNE - DEN
2 stops24h 26mMultiple Airlines
Deal found 11/23$1,372
This Cathay Pacific deal was found by Cheapflights users on 11/21. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/87:15 pmDEN - PER
2 stops36h 40mMultiple Airlines
Sat 3/712:25 amPER - DEN
2 stops32h 55mMultiple Airlines
Deal found 11/21$1,444
This Air Canada deal was found by Cheapflights users on 11/23. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/27:05 pmDEN - CNS
2 stops29h 10mMultiple Airlines
Thu 12/116:00 amCNS - DEN
2 stops23h 37mMultiple Airlines
Deal found 11/23$1,495
This Air Canada deal was found by Cheapflights users on 11/21. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/17:05 pmDEN - CNS
2 stops29h 10mMultiple Airlines
Sat 12/66:00 amCNS - DEN
2 stops23h 37mMultiple Airlines
Deal found 11/21$1,560
This Kiwi.com deal was found by Cheapflights users on 11/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/105:01 pmDEN - MEL
1 stop22h 29mMultiple Airlines
Sun 12/141:55 pmMEL - DEN
2 stops38h 17mMultiple Airlines
Deal found 11/20$1,623

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 November 23, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$895
(Trip.com)

One-way from

$421
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,265
Provider with most accurate pricing for Denver Intl-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Sydney Kingsford Smith flights.
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From Colorado to Australia
Search Deals
One-way flight from Colorado to Australia
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($199 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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 November 23, 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

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Tue 1/20

7:05 pm-8:45 am

1 stop20h 40m

Brisbane

Tue 2/3

10:45 am-12:26 pm

1 stop18h 41m

$951

DenverMelbourne

DEN - MEL

DENMEL

Denver Intl

Sun 2/22

7:10 am-12:45 pm

2 stops35h 35m

Melbourne

Sat 2/28

12:00 pm-1:01 am

1 stop31h 01m

$973

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Thu 2/26

11:42 am-8:45 am

2 stops28h 03m

Brisbane

Mon 3/9

10:45 am-12:37 pm

1 stop17h 52m

$994

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Tue 1/20

3:58 pm-8:45 am

2 stops23h 47m

Brisbane

Tue 2/3

10:45 am-4:45 pm

2 stops23h 00m

$1,020

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Sun 3/8

5:30 pm-7:45 am

2 stops46h 15m

Brisbane

Sun 3/22

9:45 am-8:54 am

2 stops39h 09m

$1,025

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Fri 3/13

7:05 pm-7:45 am

1 stop20h 40m

Brisbane

Fri 3/20

9:45 am-6:06 pm

2 stops24h 21m

$1,036

DenverMelbourne

DEN - MEL

DENMEL

Denver Intl

Wed 3/18

7:05 pm-12:25 pm

2 stops24h 20m

Melbourne

Wed 4/1

6:05 am-12:38 pm

2 stops23h 33m

$1,040

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Sun 4/5

7:05 pm-11:30 am

2 stops24h 25m

Brisbane

Sat 4/18

8:45 pm-12:38 pm

2 stops31h 53m

$1,057

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 3/12

11:42 am-8:35 am

2 stops27h 53m

Sydney Kingsford Smith

Sun 3/22

10:20 am-6:06 pm

2 stops24h 46m

$1,057

DenverAdelaide

DEN - ADL

DENADL

Denver Intl

Tue 4/7

8:49 pm-11:50 am

2 stops47h 31m

Adelaide

Mon 4/20

9:20 pm-4:34 pm

2 stops34h 44m

$1,081

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

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 $420). Flying from Colorado to Australia in July is currently the most expensive (average of $819). 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 November 23, 2025.

It’s typically best to fly out from Colorado to Australia at noon. Doing so could potentially save you 32% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from Colorado to Australia?

Use this chart to determine the cheapest time to fly round-trip from Colorado to Australia. Price data was last updated on October 27, 2024.

Travelers seeking maximum savings on their Colorado to Australia flight should consider departing on Saturday at noon when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 $951, Air Canada can have you in Australia from Colorado in 20h 40m. The distance from Colorado to Australia is about 8012 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 $420). Flying from Colorado to Australia in July is currently the most expensive (average of $819). 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 November 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$645Average$1,277FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$693Average$992FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
DeltaCheapest$830Average$1,367FlexibilityNo cancel feeOn-timeN/A
Air New ZealandCheapest$834Average$1,303FlexibilityNo cancel feeOn-time78%
Air CanadaCheapest$1,009Average$1,301FlexibilityNo cancel feeOn-time67%
Fiji AirwaysCheapest$1,159Average$1,283FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,260Average$1,534FlexibilityNo cancel feeOn-time69%

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