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$480+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Jan 21 — Jan 281
Wed 1/21
Wed 1/28
1 adult, Economy
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Cheap 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 December 22, 2025.

This oojo deal was found by Cheapflights users on 12/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:11 pmDEN - SYD
1 stop18h 49mQantas Airways
Tue 1/611:20 amSYD - DEN
1 stop25h 33mQantas Airways
Deal found 12/20$1,379
This Kiwi.com deal was found by Cheapflights users on 12/20. 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 12/246:35 amDEN - MEL
2 stops32h 55mMultiple Airlines
Thu 1/2212:00 pmMEL - DEN
1 stop29h 31mMultiple Airlines
Deal found 12/20$1,386
This American Airlines deal was found by Cheapflights users on 12/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:05 pmDEN - SYD
1 stop20h 20mAmerican Airlines
Sat 5/169:10 amSYD - DEN
1 stop22h 54mAmerican Airlines
Deal found 12/22$1,402
This American Airlines deal was found by Cheapflights users on 12/22. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:44 pmDEN - SYD
2 stops20h 16mAmerican Airlines
Sat 5/169:10 amSYD - DEN
2 stops21h 52mAmerican Airlines
Deal found 12/22$1,406
This American Airlines deal was found by Cheapflights users on 12/20. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/262:13 pmDEN - SYD
2 stops24h 47mAmerican Airlines
Sun 7/265:50 pmSYD - DEN
1 stop33h 20mAmerican Airlines
Deal found 12/20$1,416
This oojo deal was found by Cheapflights users on 12/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:39 pmDEN - SYD
1 stop26h 21mQantas Airways
Wed 1/145:45 pmSYD - DEN
1 stop19h 08mQantas Airways
Deal found 12/21$1,525
This Air Canada deal was found by Cheapflights users on 12/20. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:05 pmDEN - SYD
2 stops25h 35mAir Canada
Tue 1/137:15 pmSYD - DEN
2 stops35h 11mAir Canada
Deal found 12/20$1,531
This Qantas Airways deal was found by Cheapflights users on 12/20. 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 Qantas Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:11 pmDEN - SYD
1 stop18h 49mQantas Airways
Tue 1/1311:20 amSYD - DEN
1 stop18h 58mQantas Airways
Deal found 12/20$1,552
This American Airlines deal was found by Cheapflights users on 12/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/288:11 pmDEN - SYD
1 stop18h 49mAmerican Airlines
Mon 1/1211:20 amSYD - DEN
2 stops24h 46mAmerican Airlines
Deal found 12/21$1,556
This American Airlines deal was found by Cheapflights users on 12/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:39 pmDEN - SYD
1 stop26h 21mAmerican Airlines
Sun 1/1110:05 amSYD - DEN
2 stops20h 13mAmerican Airlines
Deal found 12/21$1,577
This oojo deal was found by Cheapflights users on 12/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2412:39 pmDEN - BNE
2 stops32h 46mQantas Airways
Mon 1/53:10 pmBNE - DEN
2 stops38h 08mQantas Airways
Deal found 12/21$1,651
This oojo deal was found by Cheapflights users on 12/20. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/2512:39 pmDEN - MEL
2 stops40h 56mQantas Airways
Tue 1/68:15 amMEL - DEN
2 stops22h 03mQantas Airways
Deal found 12/20$1,759

Find flight deals from Colorado to Australia

Keep the following information in mind while searching for Colorado to Australia flight deals. Data was last updated December 22, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$888
(Trip.com)

One-way from

$480
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,604
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. 21% potential increase in price ($294 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 22, 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

Sun 3/8

7:25 pm-7:45 am

2 stops44h 20m

Brisbane

Sun 3/22

9:45 am-6:06 pm

2 stops24h 21m

$947

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 5/1

8:19 pm-7:05 am

1 stop18h 46m

Sydney Kingsford Smith

Sun 5/24

9:10 am-11:31 am

1 stop18h 21m

$957

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 4/3

8:04 pm-8:30 am

1 stop19h 26m

Sydney Kingsford Smith

Fri 4/17

9:10 am-4:04 pm

1 stop22h 54m

$958

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 2/4

11:25 am-7:25 am

1 stop26h 00m

Sydney Kingsford Smith

Wed 2/11

11:20 am-6:00 pm

1 stop24h 40m

$968

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Sun 4/5

11:18 am-7:05 am

2 stops27h 47m

Brisbane

Sat 4/18

8:40 pm-12:38 pm

2 stops31h 58m

$974

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 3/12

2:16 pm-9:00 am

2 stops25h 44m

Sydney Kingsford Smith

Sun 3/22

5:45 pm-7:34 pm

1 stop18h 49m

$986

DenverAdelaide

DEN - ADL

DENADL

Denver Intl

Sun 4/5

4:11 pm-11:50 am

2 stops28h 09m

Adelaide

Sat 4/18

7:00 pm-12:38 pm

2 stops33h 08m

$993

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Fri 5/1

7:50 pm-7:05 am

1 stop19h 15m

Brisbane

Tue 5/19

10:00 am-6:17 pm

1 stop24h 17m

$999

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 4/3

12:49 pm-8:05 am

1 stop26h 16m

Sydney Kingsford Smith

Fri 4/17

9:10 am-3:46 pm

2 stops22h 36m

$1,008

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 4/9

8:19 pm-7:05 am

1 stop18h 46m

Sydney Kingsford Smith

Thu 4/16

9:10 am-7:49 pm

1 stop26h 39m

$1,010

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 53 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 $418). 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 December 22, 2025.

It’s typically best to fly out from Colorado to Australia at noon. Doing so could potentially save you 31% 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 December 16, 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 $957, Air Canada can have you in Australia from Colorado in 18h 46m. The distance from Colorado to Australia is about 8348 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Colorado to Australia one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $331. However, be on the lookout for offers from American Airlines and Qantas Airways, as they are both options that can get you from Colorado to Australia for a low price.

  • 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 $418). 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 December 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$684Average$1,319FlexibilityNo cancel feeOn-time74%
DeltaCheapest$698Average$1,390FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$765Average$1,226FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$770Average$1,280FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$804Average$975FlexibilityNo cancel feeOn-time71%
Air New ZealandCheapest$834Average$1,302FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$853Average$1,498FlexibilityNo cancel feeOn-time69%

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