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$495+ 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 12/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
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 November 13, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$974
(Trip.com)

One-way from

$495
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$1,265
Provider with most accurate pricing for Denver Intl-Sydney Kingsford Smith flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Sydney Kingsford Smith flights.
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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. 15% potential increase in price ($189 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($31 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 13, 2025.

This Trip.com deal was found by Cheapflights users on 11/11. 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.
Wed 12/105:01 pmDEN - SYD
1 stop21h 59mMultiple Airlines
Wed 12/175:45 pmSYD - DEN
2 stops22h 44mMultiple Airlines
Deal found 11/11$1,028
This Trip.com deal was found by Cheapflights users on 11/11. 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.
Wed 11/1911:45 amDEN - SYD
1 stop25h 40mMultiple Airlines
Wed 12/311:20 amSYD - DEN
2 stops29h 09mMultiple Airlines
Deal found 11/11$1,067
This Trip.com deal was found by Cheapflights users on 11/11. 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.
Sun 12/76:00 amDEN - SYD
1 stop33h 00mMultiple Airlines
Sun 12/215:45 pmSYD - DEN
2 stops28h 13mMultiple Airlines
Deal found 11/11$1,093
This Trip.com deal was found by Cheapflights users on 11/12. 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 11/1712:59 amDEN - SYD
2 stops36h 26mMultiple Airlines
Fri 12/511:20 amSYD - DEN
1 stop30h 57mMultiple Airlines
Deal found 11/12$1,098
This Ovago deal was found by Cheapflights users on 11/12. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:59 pmCOS - SYD
2 stops27h 26mMultiple Airlines
Wed 12/177:15 pmSYD - COS
2 stops34h 32mMultiple Airlines
Deal found 11/12$1,298
This Delta deal was found by Cheapflights users on 11/12. 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.
Thu 12/258:10 amCOS - SYD
2 stops28h 40mDelta
Tue 2/102:15 pmSYD - COS
2 stops39h 02mDelta
Deal found 11/12$1,566
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Thu 12/2512:11 pmCOS - SYD
2 stops48h 49mUnited Airlines
Thu 1/811:20 amSYD - COS
2 stops28h 38mUnited Airlines
Deal found 11/12$1,634
This oojo deal was found by Cheapflights users on 11/12. 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 12/1012:45 pmCOS - SYD
2 stops32h 05mQantas Airways
Wed 12/172:05 pmSYD - COS
1 stop19h 40mQantas Airways
Deal found 11/12$1,762
This United Airlines deal was found by Cheapflights users on 11/12. 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.
Thu 12/258:20 amCOS - SYD
2 stops30h 45mUnited Airlines
Tue 2/1011:50 amSYD - COS
1 stop28h 08mUnited Airlines
Deal found 11/12$1,817
This Orbitz deal was found by Cheapflights users on 11/12. 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.
Thu 12/259:23 amCOS - SYD
2 stops27h 32mAir Canada
Tue 2/1011:20 amSYD - COS
3 stops43h 02mAir Canada
Deal found 11/12$1,980
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Thu 11/131:40 pmASE - SYD
1 stop25h 25mUnited Airlines
Mon 11/1711:20 amSYD - ASE
1 stop19h 16mUnited Airlines
Deal found 11/10$2,062
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Fri 12/267:00 amCOS - SYD
2 stops29h 20mUnited Airlines
Fri 1/212:10 pmSYD - COS
2 stops29h 49mUnited Airlines
Deal found 11/10$2,665

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 November 13, 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

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Thu 4/2

1:37 pm-7:35 am

1 stop24h 58m

Sydney Kingsford Smith

Mon 4/6

9:25 am-2:03 pm

1 stop20h 38m

$1,347

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 11/30

7:05 pm-9:35 am

1 stop20h 30m

Sydney Kingsford Smith

Sun 12/14

11:20 am-12:37 pm

1 stop19h 17m

$1,415

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 12/30

7:10 am-6:50 am

2 stops29h 40m

Sydney Kingsford Smith

Sat 5/16

9:25 am-5:38 pm

2 stops24h 13m

$1,415

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 1/24

8:32 pm-7:00 am

1 stop40h 28m

Sydney Kingsford Smith

Fri 2/6

11:50 am-2:24 pm

1 stop20h 34m

$1,419

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Thu 3/19

3:40 pm-9:05 am

2 stops24h 25m

Sydney Kingsford Smith

Thu 4/2

10:30 am-2:20 pm

2 stops20h 50m

$1,465

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 12/10

1:25 pm-7:00 am

1 stop23h 35m

Sydney Kingsford Smith

Wed 12/17

11:20 am-12:27 pm

1 stop19h 07m

$1,511

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 12/28

5:35 am-9:15 am

1 stop33h 40m

Sydney Kingsford Smith

Mon 1/12

11:20 am-12:19 pm

1 stop18h 59m

$1,521

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Mon 12/1

6:00 am-10:30 am

2 stops34h 30m

Sydney Kingsford Smith

Mon 12/15

11:45 am-4:22 pm

2 stops22h 37m

$1,548

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 1/6

7:11 pm-7:45 pm

2 stops30h 34m

Sydney Kingsford Smith

Mon 1/26

9:40 pm-11:38 am

2 stops31h 58m

$1,557

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Mon 12/29

1:10 pm-8:30 am

1 stop25h 20m

Sydney Kingsford Smith

Sat 5/16

9:25 am-6:10 pm

1 stop24h 45m

$1,561

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/12

Showing 1-10 of 27 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, June is the cheapest month in which you can book a flight from Colorado to Sydney (average of $667). Flying from Colorado to Sydney in January is currently the most expensive (average of $860). 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 November 13, 2025.

It’s typically best to fly out from Colorado to Sydney in the evening. Doing so could potentially save you 28% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Colorado to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Colorado to Sydney flight should consider departing on Saturday at noon when fares are most often at their lowest. Thursday at noon 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 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 20h 30m. Fly via Delta, Air Canada, or United Airlines to get the fastest option. There are 8348 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, Colorado Springs - Sydney Kingsford Smith or Aspen Pitkin County - 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, June is the cheapest month in which you can book a flight from Colorado to Sydney (average of $667). Flying from Colorado to Sydney in January is currently the most expensive (average of $860). 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$806Average$898FlexibilityNo cancel feeOn-time74%
DeltaCheapest$830Average$1,367FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$832Average$865FlexibilityNo cancel feeOn-time71%
Air New ZealandCheapest$834Average$1,251FlexibilityNo cancel feeOn-time78%
Air CanadaCheapest$1,009Average$1,268FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,260Average$1,463FlexibilityNo cancel feeOn-time69%

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