HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Australia

$406+ 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 11/25. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado to Australia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 October 29, 2025.

This Air Canada deal was found by Cheapflights users on 10/29. 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 11/2511:44 amDEN - BNE
2 stops28h 01mAir Canada
Thu 12/2510:45 amBNE - DEN
2 stops24h 23mAir Canada
Deal found 10/29$768
This Air Canada deal was found by Cheapflights users on 10/28. 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.
Thu 11/277:05 pmDEN - BNE
1 stop20h 40mAir Canada
Thu 12/410:45 amBNE - DEN
1 stop18h 52mAir Canada
Deal found 10/28$770
This Air Canada deal was found by Cheapflights users on 10/27. 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 11/103:53 pmDEN - BNE
1 stop23h 52mAir Canada
Tue 11/256:35 amBNE - DEN
2 stops22h 48mAir Canada
Deal found 10/27$788
This Air Canada deal was found by Cheapflights users on 10/27. 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 11/101:25 pmDEN - BNE
2 stops26h 20mMultiple Airlines
Tue 11/256:05 amBNE - DEN
2 stops23h 18mMultiple Airlines
Deal found 10/27$793
This Air Canada deal was found by Cheapflights users on 10/26. 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.
Wed 12/2411:20 amDEN - BNE
2 stops28h 25mAir Canada
Thu 1/1510:45 amBNE - DEN
2 stops23h 00mAir Canada
Deal found 10/26$825
This Air Canada deal was found by Cheapflights users on 10/26. 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.
Thu 12/257:05 pmDEN - BNE
1 stop20h 40mAir Canada
Thu 1/1510:45 amBNE - DEN
2 stops39h 10mAir Canada
Deal found 10/26$828
This Air Canada deal was found by Cheapflights users on 10/26. 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 12/239:11 pmDEN - BNE
2 stops42h 34mAir Canada
Thu 1/1510:45 amBNE - DEN
1 stop22h 45mAir Canada
Deal found 10/26$829
This American Airlines deal was found by Cheapflights users on 10/26. 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.
Sat 11/18:11 amDEN - BNE
1 stop29h 19mAmerican Airlines
Sat 11/89:40 amBNE - DEN
1 stop21h 15mAmerican Airlines
Deal found 10/26$844
This CheapOair deal was found by Cheapflights users on 10/28. 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.
Mon 11/178:45 amDEN - BNE
1 stop31h 00mAir Canada
Mon 11/2412:05 pmBNE - DEN
2 stops45h 21mAir Canada
Deal found 10/28$845
This United Airlines deal was found by Cheapflights users on 10/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/27:05 pmDEN - BNE
1 stop19h 25mUnited Airlines
Wed 11/1911:40 amBNE - DEN
1 stop27h 40mUnited Airlines
Deal found 10/27$847
This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/512:55 pmDEN - MEL
2 stops27h 40mQantas Airways
Mon 11/1012:30 pmMEL - DEN
2 stops24h 13mQantas Airways
Deal found 10/26$1,050
This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/64:45 pmDEN - MEL
2 stops23h 50mQantas Airways
Mon 11/1012:30 pmMEL - DEN
2 stops24h 13mQantas Airways
Deal found 10/26$1,052

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 October 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$765
(Expedia)

One-way from

$406
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$1,310
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.
Search Deals
From Colorado to Australia
Search Deals
One-way flight from Colorado to Australia
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($269 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 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 October 29, 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 11/25

11:44 am-8:45 am

2 stops28h 01m

Brisbane

Thu 12/25

10:45 am-6:08 pm

2 stops24h 23m

$768

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Wed 3/4

3:56 pm-8:45 am

1 stop23h 49m

Brisbane

Fri 3/20

9:45 am-6:04 pm

2 stops24h 19m

$768

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Thu 11/27

7:05 pm-8:45 am

1 stop20h 40m

Brisbane

Thu 12/4

10:45 am-12:37 pm

1 stop18h 52m

$770

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-6:04 pm

2 stops24h 19m

$770

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Sun 4/5

11:21 am-7:05 am

2 stops27h 44m

Brisbane

Sat 4/18

8:45 pm-12:38 pm

2 stops31h 53m

$784

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Mon 2/23

7:05 pm-3:30 pm

2 stops27h 25m

Brisbane

Sun 3/8

10:45 am-5:04 pm

2 stops23h 19m

$788

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Sun 3/8

7:05 pm-11:30 am

2 stops24h 25m

Brisbane

Sun 3/22

9:45 am-6:04 pm

2 stops24h 19m

$788

DenverAdelaide

DEN - ADL

DENADL

Denver Intl

Tue 2/24

7:05 pm-7:00 pm

2 stops30h 25m

Adelaide

Tue 3/3

6:10 am-12:37 pm

2 stops23h 57m

$803

DenverAdelaide

DEN - ADL

DENADL

Denver Intl

Mon 2/2

7:05 pm-7:10 pm

2 stops30h 35m

Adelaide

Tue 2/17

6:10 am-7:28 pm

2 stops30h 48m

$871

DenverAdelaide

DEN - ADL

DENADL

Denver Intl

Sun 2/1

7:05 pm-10:30 pm

2 stops33h 55m

Adelaide

Sun 2/15

6:10 am-5:44 pm

2 stops29h 04m

$871

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 60 results
1
2
3
...
6

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 $421). Flying from Colorado to Australia in October is currently the most expensive (average of $825). 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 October 29, 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 $1,185, Air Canada can have you in Australia from Colorado in 19h 02m. 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.

  • 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 $421). Flying from Colorado to Australia in October is currently the most expensive (average of $825). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Colorado to Australia

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Sydney flights
Los Angeles to Melbourne flights
Los Angeles to Auckland flights
San Francisco to Sydney flights
John F Kennedy Intl to Sydney flights
Los Angeles to Papeete flights
Dallas/Fort Worth to Sydney flights
San Francisco to Auckland flights
San Francisco to Melbourne flights
Newark to Sydney flights
John F Kennedy Intl to Auckland flights
LaGuardia to Sydney flights
John F Kennedy Intl to Melbourne flights
Dallas/Fort Worth to Melbourne flights
Dallas/Fort Worth to Auckland flights
Seattle to Auckland flights
Newark to Melbourne flights
Hobby to Sydney flights
Seattle to Sydney flights
Los Angeles to Brisbane flights
Newark to Auckland flights
Dulles Intl to Sydney flights
San Francisco to Papeete flights
O'Hare Intl to Sydney flights
Ontario to Sydney flights
George Bush Intcntl to Sydney flights
LaGuardia to Auckland flights
Boston to Sydney flights
Santa Ana to Sydney flights
LaGuardia to Melbourne flights
Seattle to Melbourne flights
Reagan-National to Sydney flights
Los Angeles to Avalon flights
Dallas/Fort Worth to Brisbane flights
Dulles Intl to Melbourne flights
O'Hare Intl to Auckland flights
Atlanta to Sydney flights
Honolulu to Auckland flights
Boston to Auckland flights
Dulles Intl to Auckland flights
O'Hare Intl to Melbourne flights
Baltimore to Sydney flights
Ontario to Auckland flights
Denver to Sydney flights
Hobby to Auckland flights
Denver to Auckland flights
Santa Ana to Auckland flights
Baltimore to Melbourne flights
Los Angeles to Nadi flights
Sky Harbor Intl to Sydney flights

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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$645Average$1,279FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$693Average$992FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
DeltaCheapest$786Average$1,380FlexibilityNo cancel feeOn-timeN/A
Air New ZealandCheapest$834Average$1,303FlexibilityNo cancel feeOn-time78%
Air CanadaCheapest$1,009Average$1,305FlexibilityNo cancel feeOn-time67%
Fiji AirwaysCheapest$1,159Average$1,283FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$1,310Average$1,536FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.