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$399+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Apr 28 — May 51
Tue 4/28
Tue 5/5
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 29, 2026.

This Trip.com deal was found by Cheapflights users on 3/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/127:20 am
DEN
-
SYD
2 stops46h 50m
Multiple Airlines
Mon 5/181:15 pm
SYD
-
DEN
2 stops27h 23m
Multiple Airlines
Deal found 3/28$821
This Trip.com deal was found by Cheapflights users on 3/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:00 am
DEN
-
SYD
2 stops37h 05m
Multiple Airlines
Mon 5/181:15 pm
SYD
-
DEN
2 stops27h 23m
Multiple Airlines
Deal found 3/28$823
This Trip.com deal was found by Cheapflights users on 3/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:00 am
DEN
-
SYD
2 stops37h 05m
Multiple Airlines
Sun 5/176:00 am
SYD
-
DEN
2 stops34h 38m
Multiple Airlines
Deal found 3/27$851
This Trip.com deal was found by Cheapflights users on 3/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/267:20 am
DEN
-
SYD
2 stops36h 30m
Multiple Airlines
Tue 6/21:15 pm
SYD
-
DEN
2 stops22h 51m
Multiple Airlines
Deal found 3/25$863
This Trip.com deal was found by Cheapflights users on 3/24. 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 5/46:00 am
DEN
-
SYD
2 stops48h 10m
Multiple Airlines
Fri 5/86:00 am
SYD
-
DEN
2 stops34h 38m
Multiple Airlines
Deal found 3/24$883
This Trip.com deal was found by Cheapflights users on 3/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/117:00 am
DEN
-
SYD
2 stops37h 05m
Multiple Airlines
Sun 5/241:15 pm
SYD
-
DEN
2 stops22h 51m
Multiple Airlines
Deal found 3/26$895
This Trip.com deal was found by Cheapflights users on 3/29. 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.
Tue 5/196:00 am
DEN
-
SYD
3 stops37h 50m
Multiple Airlines
Sun 5/246:00 am
SYD
-
DEN
2 stops30h 06m
Multiple Airlines
Deal found 3/29$942
This Trip.com deal was found by Cheapflights users on 3/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/237:00 am
DEN
-
SYD
2 stops36h 50m
Multiple Airlines
Fri 6/51:15 pm
SYD
-
DEN
2 stops27h 23m
Multiple Airlines
Deal found 3/25$943
This Trip.com deal was found by Cheapflights users on 3/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/257:00 am
DEN
-
SYD
2 stops47h 10m
Multiple Airlines
Fri 5/296:00 am
SYD
-
DEN
2 stops34h 38m
Multiple Airlines
Deal found 3/28$949
This lol.travel deal was found by Cheapflights users on 3/24. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/267:05 pm
DEN
-
SYD
1 stop20h 15m
Air Canada
Sun 5/109:20 am
SYD
-
DEN
2 stops24h 47m
Air Canada
Deal found 3/24$1,093
This United Airlines deal was found by Cheapflights users on 3/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/136:58 pm
ASE
-
SYD
1 stop20h 02m
United Airlines
Sat 8/229:30 am
SYD
-
ASE
1 stop26h 56m
United Airlines
Deal found 3/28$1,406
This Delta deal was found by Cheapflights users on 3/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1312:00 pm
ASE
-
SYD
1 stop26h 50m
Delta
Sat 8/229:15 am
SYD
-
ASE
1 stop26h 48m
Delta
Deal found 3/27$1,407

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 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$821
(Trip.com)

One-way from

$399
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$1,221
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. 10% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($31 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 29, 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

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 5/24

6:08 pm-7:05 am

1 stop20h 57m

Sydney Kingsford Smith

Thu 5/28

9:10 am-5:37 pm

1 stop24h 27m

$1,233

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 5/7

12:41 pm-7:05 am

1 stop26h 24m

Sydney Kingsford Smith

Mon 5/11

9:10 am-5:48 pm

1 stop24h 38m

$1,234

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 4/23

6:07 pm-6:50 pm

2 stops32h 43m

Sydney Kingsford Smith

Thu 4/30

8:45 pm-12:06 pm

2 stops31h 21m

$1,368

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

$1,406

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Thu 8/13

6:58 pm-7:00 am

1 stop20h 02m

Sydney Kingsford Smith

Sat 8/22

9:30 am-1:36 pm

1 stop20h 06m

$1,407

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Sat 5/9

11:40 am-7:00 am

2 stops27h 20m

Sydney Kingsford Smith

Sat 5/16

10:20 am-5:26 pm

2 stops23h 06m

$1,432

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Wed 5/13

5:12 pm-7:00 am

2 stops21h 48m

Sydney Kingsford Smith

Sun 5/17

9:30 am-6:22 pm

2 stops24h 52m

$1,502

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 7/8

5:54 pm-6:55 am

1 stop21h 01m

Sydney Kingsford Smith

Wed 7/22

10:20 am-4:35 pm

1 stop22h 15m

$1,608

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 5/1

12:55 pm-6:50 am

1 stop25h 55m

Sydney Kingsford Smith

Sun 5/10

9:15 am-5:35 pm

1 stop24h 20m

$1,642

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 6/27

3:55 pm-6:50 am

2 stops22h 55m

Sydney Kingsford Smith

Sun 7/12

9:15 am-8:01 pm

2 stops26h 46m

$1,646

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/29

Showing 1-10 of 26 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 $994). 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 20h 02m. Fly via Qantas Airways, Delta, or United Airlines 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 Delta, with prices starting from $424 and $437, 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 $994). 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 March 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$253Average$1,364FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$684Average$1,191FlexibilityNo cancel feeOn-time74%
Alaska AirlinesCheapest$745Average$958FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$800Average$1,371FlexibilityNo cancel feeOn-time74%
United AirlinesCheapest$853Average$1,459FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$874Average$1,286FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$1,009Average$1,249FlexibilityNo cancel feeOn-time67%
Air New ZealandCheapest$1,121Average$1,285FlexibilityNo cancel feeOn-time78%

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