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$449+ Cheap flights from Colorado to Sydney (SYD)

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 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap flight deals from Colorado to Sydney

Keep the following information in mind while searching for Colorado to Sydney flight deals. Data was last updated September 16, 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 Sydney Kingsford Smith
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One-way flight from Colorado to Sydney Kingsford Smith
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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 Sydney

Cheapest flights from Colorado to Sydney
Explore the most affordable flight options available from Colorado to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Alaska Airlines deal was found by Cheapflights users on 9/14. 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.
Tue 11/118:02 pmDEN - SYD
2 stops29h 43mAlaska Airlines
Tue 11/189:40 pmSYD - DEN
2 stops32h 47mAlaska Airlines
Deal found 9/14$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.
Tue 11/48:02 pmDEN - SYD
2 stops29h 43mAlaska Airlines
Sun 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.
Wed 10/226:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
Sat 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.
Thu 10/308:02 pmDEN - SYD
2 stops30h 43mAlaska Airlines
Tue 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 9/15. 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.
Wed 10/226:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
Fri 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.
Fri 10/311:23 pmDEN - SYD
2 stops37h 22mAlaska Airlines
Tue 11/189:40 pmSYD - DEN
2 stops32h 47mAlaska 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.
Tue 11/48:02 pmDEN - SYD
2 stops29h 43mAlaska Airlines
Thu 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.
Wed 10/226:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
Tue 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.
Thu 10/166:20 pmDEN - SYD
2 stops32h 25mAlaska Airlines
Sat 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.
Thu 10/308:02 pmDEN - SYD
2 stops30h 43mAlaska Airlines
Sat 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.
Fri 10/317:00 amDEN - SYD
2 stops43h 45mAlaska Airlines
Thu 11/209:40 pmSYD - DEN
2 stops44h 21mAlaska Airlines
Deal found 9/16$1,054
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.
Fri 10/317:00 amDEN - SYD
2 stops43h 45mAlaska Airlines
Sat 11/159:40 pmSYD - DEN
2 stops32h 47mAlaska Airlines
Deal found 9/16$1,059

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado to Sydney 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 September 16, 2025.
Use the filters below to find and compare flights from Colorado to Sydney that are best for you.

Fly from

Colorado

Fly to

Sydney

Route

Depart

Return

Price

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 11/4

8:02 pm-7:45 pm

2 stops29h 43m

Sydney Kingsford Smith

Thu 11/20

9:40 pm-12:01 am

2 stops44h 21m

$1,045

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 10/30

3:37 pm-7:45 pm

2 stops35h 08m

Sydney Kingsford Smith

Thu 11/6

9:40 pm-2:41 pm

2 stops35h 01m

$1,118

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 11/2

8:02 pm-7:45 pm

2 stops29h 43m

Sydney Kingsford Smith

Thu 11/20

9:40 pm-12:01 am

2 stops44h 21m

$1,136

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Wed 10/29

12:10 pm-10:30 am

2 stops29h 20m

Sydney Kingsford Smith

Wed 11/5

9:55 am-9:38 pm

2 stops29h 43m

$1,168

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Thu 11/13

12:01 pm-8:30 am

1 stop26h 29m

Sydney Kingsford Smith

Mon 11/17

10:40 am-12:22 pm

1 stop19h 42m

$1,303

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Wed 10/29

12:10 pm-7:10 am

1 stop26h 00m

Sydney Kingsford Smith

Wed 11/5

10:40 am-5:52 pm

1 stop25h 12m

$1,335

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 12/30

1:08 pm-8:30 am

1 stop25h 22m

Sydney Kingsford Smith

Tue 1/13

10:40 am-11:32 am

1 stop18h 52m

$1,363

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Mon 1/5

7:37 pm-9:05 am

1 stop19h 28m

Sydney Kingsford Smith

Mon 1/19

11:20 am-7:55 pm

2 stops26h 35m

$1,367

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 11/5

7:19 pm-8:30 am

1 stop19h 11m

Sydney Kingsford Smith

Fri 11/21

10:40 am-11:43 am

1 stop19h 03m

$1,413

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 12/25

1:08 pm-8:30 am

1 stop25h 22m

Sydney Kingsford Smith

Wed 1/14

10:40 am-6:09 pm

1 stop25h 29m

$1,413

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 39 results
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Best time to book a flight from Colorado to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney 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 Sydney

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

Currently, March is the cheapest month in which you can book a flight from Colorado to Sydney (average of $1,032). Flying from Colorado to Sydney 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 SYD?

Find hourly flight availability from Colorado to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Colorado to Sydney, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Colorado to Sydney?

Related info for your journey

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

  • What airport do you fly into for flights to Sydney from Colorado?

    Located just 4.6 mi from the city center, Sydney Kingsford Smith (SYD) is the airport most travelers will use when flying to Sydney from Colorado.

  • How long is the flight from Colorado to Sydney?

    There are many flights that can get you from Colorado to Sydney in 26h 29m. Fly via Alaska Airlines, Air New Zealand, or Delta to get the fastest option. There are 8223 mi between Colorado and Sydney. This flight may include one or multiple stops.

  • What are the most popular routes from Colorado to Sydney?

    Most travelers choose Denver Intl - Sydney Kingsford Smith, Aspen Pitkin County - Sydney Kingsford Smith or Colorado Springs - Sydney Kingsford Smith when deciding on the best route from Colorado to Sydney.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Colorado to Sydney 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 Sydney?

    Currently, March is the cheapest month in which you can book a flight from Colorado to Sydney (average of $1,032). Flying from Colorado to Sydney 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly
Coogee

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Top 7 airlines flying from Colorado to Sydney

Discover the top 7 airlines that operate flights from Colorado to Sydney. 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$698Average$1,367FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$807Average$905FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$832Average$867FlexibilityNo cancel feeOn-time71%
Air New ZealandCheapest$834Average$1,236FlexibilityNo cancel feeOn-time78%
Air CanadaCheapest$1,034Average$1,228FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,261Average$1,473FlexibilityNo cancel feeOn-time69%

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