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$430+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Mar 31 — Apr 71
Tue 3/31
Tue 4/7
1 adult, Economy
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Cheap 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 March 1, 2026.

This Delta deal was found by Cheapflights users on 2/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:00 pm
ASE
-
SYD
1 stop26h 50m
Delta
Wed 9/309:15 am
SYD
-
ASE
1 stop26h 48m
Delta
Deal found 2/26$1,066
This United Airlines deal was found by Cheapflights users on 2/27. 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.
Tue 4/143:29 pm
ASE
-
SYD
2 stops23h 31m
United Airlines
Tue 4/219:30 am
SYD
-
ASE
1 stop22h 35m
United Airlines
Deal found 2/27$1,067
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/92:17 pm
ASE
-
SYD
2 stops24h 43m
United Airlines
Wed 9/309:30 am
SYD
-
ASE
2 stops20h 51m
United Airlines
Deal found 2/26$1,071
This Kiwi.com deal was found by Cheapflights users on 2/25. 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.
Mon 4/2710:29 pm
DEN
-
SYD
2 stops45h 21m
Multiple Airlines
Tue 5/125:50 pm
SYD
-
DEN
1 stop32h 57m
Multiple Airlines
Deal found 2/25$1,082
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/276:00 am
DEN
-
SYD
2 stops38h 05m
Multiple Airlines
Tue 5/55:50 pm
SYD
-
DEN
1 stop32h 57m
Multiple Airlines
Deal found 2/27$1,084
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/110:29 pm
DEN
-
SYD
2 stops45h 21m
Multiple Airlines
Fri 5/85:50 pm
SYD
-
DEN
1 stop31h 55m
Multiple Airlines
Deal found 2/27$1,094
This Kiwi.com deal was found by Cheapflights users on 2/25. 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.
Mon 4/2010:29 pm
DEN
-
SYD
2 stops45h 21m
Multiple Airlines
Mon 5/45:50 pm
SYD
-
DEN
1 stop32h 57m
Multiple Airlines
Deal found 2/25$1,102
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/149:30 pm
DEN
-
SYD
1 stop42h 00m
Multiple Airlines
Tue 4/215:50 pm
SYD
-
DEN
1 stop32h 57m
Multiple Airlines
Deal found 2/28$1,103
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/285:33 pm
ASE
-
SYD
1 stop21h 32m
United Airlines
Wed 3/411:20 am
SYD
-
ASE
1 stop19h 35m
United Airlines
Deal found 2/26$1,107
This Air Canada deal was found by Cheapflights users on 2/27. 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.
Wed 3/257:05 pm
DEN
-
SYD
1 stop20h 30m
Air Canada
Tue 4/79:20 am
SYD
-
DEN
1 stop19h 15m
Air Canada
Deal found 2/27$1,109
This Air Canada deal was found by Cheapflights users on 2/27. 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 5/127:50 pm
DEN
-
SYD
1 stop19h 30m
Air Canada
Tue 5/269:20 am
SYD
-
DEN
1 stop23h 40m
Air Canada
Deal found 2/27$1,110
This United Airlines deal was found by Cheapflights users on 3/1. 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 5/299:40 am
ASE
-
SYD
1 stop29h 15m
United Airlines
Mon 6/159:30 am
SYD
-
ASE
2 stops21h 14m
United Airlines
Deal found 3/1$1,113

Find flight deals from Colorado to Sydney

Keep the following information in mind while searching for Colorado to Sydney flight deals. Data was last updated March 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$1,067
(United Airlines)

One-way from

$430
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,105
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 Sydney Kingsford Smith
Search Deals
One-way flight from Colorado to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 March 1, 2026.
Use the filters below to find and compare flights from Colorado to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Tue 4/14

12:18 pm-6:50 am

1 stop26h 32m

Sydney Kingsford Smith

Tue 4/21

9:15 am-12:45 pm

1 stop19h 30m

$1,067

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Tue 4/14

3:29 pm-7:00 am

2 stops23h 31m

Sydney Kingsford Smith

Tue 4/21

10:20 am-2:40 pm

2 stops20h 20m

$1,071

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Fri 5/29

12:00 pm-6:50 am

1 stop26h 50m

Sydney Kingsford Smith

Mon 6/15

9:15 am-8:03 pm

1 stop26h 48m

$1,108

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Fri 5/29

7:15 pm-7:00 am

1 stop19h 45m

Sydney Kingsford Smith

Mon 6/15

9:30 am-5:26 pm

2 stops23h 56m

$1,112

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Mon 4/13

3:26 pm-7:00 am

2 stops23h 34m

Sydney Kingsford Smith

Mon 4/27

9:30 am-4:32 pm

2 stops23h 02m

$1,138

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Thu 8/13

12:00 pm-6:50 am

1 stop26h 50m

Sydney Kingsford Smith

Sat 8/22

9:15 am-8:03 pm

1 stop26h 48m

$1,147

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Thu 8/13

8:00 pm-7:00 am

1 stop19h 00m

Sydney Kingsford Smith

Sat 8/22

9:30 am-2:15 pm

1 stop20h 45m

$1,147

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 4/3

8:04 pm-8:05 am

1 stop19h 01m

Sydney Kingsford Smith

Sun 4/12

9:10 am-12:06 pm

1 stop18h 56m

$1,405

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 3/13

3:36 pm-8:05 am

2 stops23h 29m

Sydney Kingsford Smith

Sun 3/22

10:20 am-2:55 pm

2 stops21h 35m

$1,413

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 3/13

8:00 pm-8:05 am

1 stop19h 05m

Sydney Kingsford Smith

Mon 3/23

10:25 am-4:27 pm

1 stop23h 02m

$1,421

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/28

Showing 1-10 of 31 resultsSorted by cheapest first
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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, September is the cheapest month in which you can book a flight from Colorado to Sydney (average of $303). Flying from Colorado to Sydney in January is currently the most expensive (average of $970). 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.

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 19h 01m. Fly via Delta, United Airlines, or Qantas Airways to get the fastest option. There are 8348 mi between Colorado and Sydney. This flight may include one or multiple stops.

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

    $384 is the cheapest one-way deal found within the past few days, from Alaska Airlines. You may also be able to find cheap deals on Qantas Airways and American Airlines, with prices starting from $392 and $411, respectively.

  • 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, September is the cheapest month in which you can book a flight from Colorado to Sydney (average of $303). Flying from Colorado to Sydney in January is currently the most expensive (average of $970). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from Colorado to Sydney

Discover the top 8 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 March 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$255Average$1,365FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$684Average$1,191FlexibilityNo cancel feeOn-time74%
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$800Average$1,332FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$833Average$1,131FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$853Average$1,458FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$980Average$1,251FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,144Average$1,274FlexibilityNo cancel feeOn-time78%

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