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$421+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Jul 31 — Aug 71
Fri 7/31
Fri 8/7
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 July 1, 2026.

This Trip.com deal was found by Cheapflights users on 6/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/277:00 am
DEN
-
SYD
2 stops36h 50m
Multiple Airlines
Thu 8/66:15 am
SYD
-
DEN
2 stops34h 27m
Multiple Airlines
Deal found 6/29$942
This Trip.com deal was found by Cheapflights users on 6/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/237:00 am
DEN
-
SYD
2 stops36h 50m
Multiple Airlines
Sun 9/61:15 pm
SYD
-
DEN
2 stops27h 29m
Multiple Airlines
Deal found 6/29$973
This Kiwi.com deal was found by Cheapflights users on 6/27. 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.
Tue 8/1110:39 pm
DEN
-
SYD
2 stops45h 11m
Multiple Airlines
Tue 8/185:50 pm
SYD
-
DEN
1 stop32h 13m
Multiple Airlines
Deal found 6/27$1,073
This Trip.com deal was found by Cheapflights users on 6/30. 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.
Tue 7/288:45 am
DEN
-
SYD
2 stops35h 05m
Multiple Airlines
Tue 8/41:15 pm
SYD
-
DEN
3 stops50h 42m
Multiple Airlines
Deal found 6/30$1,074
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Sat 8/2910:39 pm
DEN
-
SYD
2 stops45h 11m
Multiple Airlines
Tue 9/85:50 pm
SYD
-
DEN
1 stop31h 50m
Multiple Airlines
Deal found 6/28$1,082
This Kiwi.com deal was found by Cheapflights users on 6/26. 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.
Wed 8/197:25 am
DEN
-
SYD
2 stops36h 25m
Multiple Airlines
Mon 11/1611:15 am
SYD
-
DEN
1 stop40h 40m
Multiple Airlines
Deal found 6/26$1,083
This Kiwi.com deal was found by Cheapflights users on 6/28. 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.
Mon 8/1710:39 pm
DEN
-
SYD
2 stops45h 11m
Multiple Airlines
Fri 8/285:50 pm
SYD
-
DEN
1 stop32h 13m
Multiple Airlines
Deal found 6/28$1,086
This Trip.com deal was found by Cheapflights users on 6/30. 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.
Sat 7/257:00 am
DEN
-
SYD
2 stops47h 25m
Multiple Airlines
Fri 7/311:15 pm
SYD
-
DEN
2 stops27h 14m
Multiple Airlines
Deal found 6/30$1,091
This Kiwi.com deal was found by Cheapflights users on 6/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:25 am
DEN
-
SYD
2 stops36h 25m
Multiple Airlines
Thu 11/1911:15 am
SYD
-
DEN
1 stop31h 10m
Multiple Airlines
Deal found 6/29$1,096
This Kiwi.com deal was found by Cheapflights users on 6/27. 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.
Sat 10/1710:29 pm
DEN
-
SYD
2 stops45h 21m
Multiple Airlines
Sun 11/111:15 am
SYD
-
DEN
1 stop40h 40m
Multiple Airlines
Deal found 6/27$1,097
This Kiwi.com deal was found by Cheapflights users on 6/27. 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.
Tue 10/206:30 am
DEN
-
SYD
2 stops37h 20m
Multiple Airlines
Thu 11/511:15 am
SYD
-
DEN
1 stop21h 22m
Multiple Airlines
Deal found 6/27$1,098
This KAYAK deal was found by Cheapflights users on 6/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/137:12 pm
ASE
-
SYD
1 stop19h 48m
Air New Zealand
Sat 8/2210:20 am
SYD
-
ASE
1 stop25h 32m
Air New Zealand
Deal found 6/30$1,270

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 July 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$825
(Trip.com)

One-way from

$421
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$1,156
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. 14% potential increase in price ($226 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($42 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 July 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

Cheapest round-trip

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Thu 8/13

7:12 pm-7:00 am

1 stop19h 48m

Sydney Kingsford Smith

Sat 8/22

10:20 am-7:52 pm

1 stop25h 32m

$1,270

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Thu 8/13

9:40 am-6:55 am

1 stop29h 15m

Sydney Kingsford Smith

Sat 8/22

10:20 am-7:52 pm

1 stop25h 32m

$1,286

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 8/27

3:57 pm-8:45 am

2 stops24h 48m

Sydney Kingsford Smith

Sat 9/12

11:55 am-11:07 pm

2 stops27h 12m

$1,343

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 8/27

1:43 pm-6:50 pm

2 stops37h 07m

Sydney Kingsford Smith

Sun 9/6

8:45 pm-12:20 pm

2 stops31h 35m

$1,468

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 8/25

10:39 pm-7:30 am

1 stop40h 51m

Sydney Kingsford Smith

Thu 9/3

12:00 pm-10:55 pm

1 stop26h 55m

$1,488

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 7/29

11:23 am-7:20 am

2 stops27h 57m

Sydney Kingsford Smith

Wed 8/5

9:20 am-7:35 pm

2 stops26h 15m

$1,516

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Thu 8/13

12:20 pm-6:55 am

2 stops26h 35m

Sydney Kingsford Smith

Mon 8/17

10:20 am-4:26 pm

2 stops22h 06m

$1,530

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Thu 8/13

7:45 am-7:20 am

3 stops31h 35m

Sydney Kingsford Smith

Mon 8/17

9:20 am-8:40 am

2 stops39h 20m

$1,894

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 7/19

9:08 pm-6:50 pm

2 stops29h 42m

Sydney Kingsford Smith

Tue 8/11

8:45 pm-10:33 am

2 stops29h 48m

$1,954

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 8/19

5:45 pm-4:45 pm

2 stops31h 00m

Sydney Kingsford Smith

Mon 11/16

7:10 pm-5:56 pm

3 stops40h 46m

$2,218

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Showing 1-10 of 21 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 $73). Flying from Colorado to Sydney in January is currently the most expensive (average of $850). 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?

How far ahead should I book a flight from Colorado to Sydney?

To ensure you get the cheapest price possible for a flight from Colorado to Sydney, you should look to book at least 31 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 48m. Fly via Air New Zealand, United Airlines, or Air Canada to get the fastest option. There are 8223 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?

    $411 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Qantas Airways and Air Canada, with prices starting from $424 and $599, 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 $73). Flying from Colorado to Sydney in January is currently the most expensive (average of $850). 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
Coogee
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 July 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$1,364FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$684Average$793FlexibilityNo cancel feeOn-time74%
Alaska AirlinesCheapest$745Average$924FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$800Average$1,337FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$844Average$1,081FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$853Average$1,460FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$1,009Average$1,301FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,144Average$1,286FlexibilityNo cancel feeOn-time78%

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