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$484+ 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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Jan 28 — Feb 41
Wed 1/28
Wed 2/4
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 29, 2025.

This Cathay Pacific deal was found by Cheapflights users on 12/29. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:40 pmDEN - SYD
2 stops32h 10mMultiple Airlines
Sat 5/169:50 pmSYD - DEN
2 stops42h 09mMultiple Airlines
Deal found 12/29$1,471
This Air Canada deal was found by Cheapflights users on 12/29. 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 12/308:45 amDEN - SYD
1 stop28h 10mAir Canada
Sat 5/169:20 amSYD - DEN
1 stop23h 40mAir Canada
Deal found 12/29$1,499
This Cathay Pacific deal was found by Cheapflights users on 12/28. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:44 amDEN - SYD
2 stops32h 51mMultiple Airlines
Sat 5/167:40 amSYD - DEN
2 stops30h 10mMultiple Airlines
Deal found 12/28$1,546
This Air Canada deal was found by Cheapflights users on 12/28. 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.
Mon 12/297:05 pmDEN - SYD
1 stop20h 30mAir Canada
Sat 5/169:20 amSYD - DEN
1 stop23h 40mAir Canada
Deal found 12/28$1,584
This Air Canada deal was found by Cheapflights users on 12/27. 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.
Tue 12/308:45 amDEN - SYD
1 stop28h 10mAir Canada
Tue 1/137:15 pmSYD - DEN
2 stops35h 11mAir Canada
Deal found 12/27$1,598
This Kiwi.com deal was found by Cheapflights users on 12/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:00 amDEN - SYD
1 stop31h 25mMultiple Airlines
Sun 1/1110:00 pmSYD - DEN
2 stops40h 04mMultiple Airlines
Deal found 12/26$1,662
This Delta deal was found by Cheapflights users on 12/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/286:25 pmDEN - SYD
1 stop18h 25mDelta
Mon 1/122:15 pmSYD - DEN
1 stop21h 55mDelta
Deal found 12/28$1,664
This United Airlines deal was found by Cheapflights users on 12/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:45 amDEN - SYD
1 stop29h 15mUnited Airlines
Sat 5/1610:20 amSYD - DEN
1 stop20h 39mUnited Airlines
Deal found 12/29$1,714
This oojo deal was found by Cheapflights users on 12/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/279:17 pmDEN - BNE
2 stops43h 38mAir New Zealand
Sun 1/116:05 pmBNE - DEN
2 stops39h 27mAir New Zealand
Deal found 12/26$2,041
This oojo deal was found by Cheapflights users on 12/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/278:11 pmDEN - BNE
1 stop40h 34mQantas Airways
Sun 1/1112:10 pmBNE - DEN
1 stop17h 08mQantas Airways
Deal found 12/26$2,106
This Orbitz deal was found by Cheapflights users on 12/26. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/275:30 pmDEN - BNE
2 stops46h 15mMultiple Airlines
Sun 1/117:50 pmBNE - DEN
2 stops38h 54mMultiple Airlines
Deal found 12/26$2,148
This oojo deal was found by Cheapflights users on 12/27. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:37 pmDEN - MEL
1 stop19h 53mAir New Zealand
Mon 1/56:50 pmMEL - DEN
2 stops41h 26mAir New Zealand
Deal found 12/27$2,206

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 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$825
(Trip.com)

One-way from

$484
(Trip.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 ($293 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($49 potential savings vs. average RT price).
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Average for round-trip flights in December 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 December 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

Wed 3/11

9:00 am-10:25 am

2 stops33h 25m

Brisbane

Sun 3/22

11:50 am-12:30 am

2 stops28h 40m

$888

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

$948

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Sun 4/5

11:20 am-7:05 am

2 stops27h 45m

Brisbane

Sat 4/18

8:40 pm-12:33 pm

2 stops31h 53m

$976

DenverBrisbane

DEN - BNE

DENBNE

Denver Intl

Sat 2/7

9:05 pm-8:45 am

2 stops42h 40m

Brisbane

Sat 2/21

10:45 am-12:37 pm

1 stop18h 52m

$1,018

DenverAdelaide

DEN - ADL

DENADL

Denver Intl

Wed 4/1

7:05 pm-1:30 pm

2 stops25h 55m

Adelaide

Wed 4/15

7:00 pm-12:38 pm

2 stops33h 08m

$1,032

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

$1,043

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 2/7

12:00 pm-7:25 am

1 stop25h 25m

Sydney Kingsford Smith

Fri 2/13

5:45 pm-6:05 pm

1 stop18h 20m

$1,077

DenverMelbourne

DEN - MEL

DENMEL

Denver Intl

Sun 4/5

12:49 pm-6:45 am

1 stop25h 56m

Melbourne

Sat 4/18

9:45 am-7:49 pm

1 stop26h 04m

$1,119

DenverMelbourne

DEN - MEL

DENMEL

Denver Intl

Mon 2/23

12:47 pm-9:30 am

1 stop26h 43m

Melbourne

Tue 3/10

12:00 pm-7:14 pm

1 stop24h 14m

$1,119

DenverMelbourne

DEN - MEL

DENMEL

Denver Intl

Mon 5/4

12:37 pm-6:45 am

1 stop26h 08m

Melbourne

Tue 5/26

9:45 am-5:37 pm

1 stop23h 52m

$1,119

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/28

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 $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 29, 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 $1,171, Air Canada can have you in Australia from Colorado in 24h 36m. 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 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$277Average$1,386FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$684Average$1,319FlexibilityNo cancel feeOn-time74%
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$765Average$1,239FlexibilityNo cancel feeOn-time74%
Air CanadaCheapest$770Average$1,280FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$804Average$967FlexibilityNo cancel feeOn-time71%
Air New ZealandCheapest$834Average$1,300FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$853Average$1,489FlexibilityNo cancel feeOn-time69%

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