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$492+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This FlightHub deal was found by Cheapflights users on 12/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:05 pmDEN - SYD
2 stops27h 35mMultiple Airlines
Tue 1/137:15 pmSYD - DEN
2 stops39h 15mMultiple Airlines
Deal found 12/16$1,464
This Air Canada deal was found by Cheapflights users on 12/17. 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 12/307:05 pmDEN - SYD
2 stops25h 35mAir Canada
Tue 1/137:15 pmSYD - DEN
2 stops39h 15mAir Canada
Deal found 12/17$1,532
This American Airlines deal was found by Cheapflights users on 12/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:11 pmDEN - SYD
1 stop18h 49mAmerican Airlines
Tue 1/1311:20 amSYD - DEN
1 stop18h 58mAmerican Airlines
Deal found 12/17$1,572
This Air Canada deal was found by Cheapflights users on 12/17. 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.
Sun 12/287:05 pmDEN - SYD
1 stop20h 30mAir Canada
Mon 1/127:15 pmSYD - DEN
2 stops35h 22mAir Canada
Deal found 12/17$1,596
This FlightHub deal was found by Cheapflights users on 12/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/257:05 pmDEN - SYD
1 stop20h 30mAir Canada
Wed 1/149:00 amSYD - DEN
2 stops21h 26mAir Canada
Deal found 12/16$1,602
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/243:41 pmDEN - SYD
1 stop21h 19mUnited Airlines
Sun 1/1111:50 amSYD - DEN
1 stop24h 35mUnited Airlines
Deal found 12/17$1,663
This Delta deal was found by Cheapflights users on 12/17. 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 12/247:10 amDEN - SYD
2 stops31h 20mDelta
Sun 1/1110:40 amSYD - DEN
2 stops30h 45mDelta
Deal found 12/17$1,668

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 December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$836
(Trip.com)

One-way from

$492
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,604
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
Search Deals
One-way flight from Colorado to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($294 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 18, 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

Wed 3/4

7:05 pm-9:35 am

1 stop20h 30m

Sydney Kingsford Smith

Wed 3/18

10:20 am-12:28 pm

1 stop19h 08m

$954

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 2/15

11:42 am-9:35 am

2 stops27h 53m

Sydney Kingsford Smith

Sun 3/8

8:00 am-11:37 am

2 stops21h 37m

$969

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 2/8

11:42 am-9:35 am

2 stops27h 53m

Sydney Kingsford Smith

Sun 2/22

8:00 am-12:28 pm

2 stops22h 28m

$974

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 3/12

8:04 pm-9:00 am

1 stop19h 56m

Sydney Kingsford Smith

Wed 3/25

5:45 pm-12:59 am

2 stops24h 14m

$1,006

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 2/7

12:53 pm-9:00 am

1 stop26h 07m

Sydney Kingsford Smith

Sat 2/14

11:20 am-4:00 pm

2 stops22h 40m

$1,028

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 1/31

7:05 pm-9:35 am

1 stop20h 30m

Sydney Kingsford Smith

Thu 2/12

11:20 am-4:53 pm

2 stops23h 33m

$1,039

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 1/15

7:05 pm-5:40 pm

2 stops28h 35m

Sydney Kingsford Smith

Thu 1/22

11:20 am-6:07 pm

2 stops24h 47m

$1,059

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 2/28

11:19 am-9:35 am

2 stops28h 16m

Sydney Kingsford Smith

Tue 3/3

11:20 am-12:37 pm

1 stop19h 17m

$1,099

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Sun 5/10

3:25 pm-7:00 am

2 stops23h 35m

Sydney Kingsford Smith

Sun 5/31

9:30 am-5:29 pm

2 stops23h 59m

$1,153

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Mon 5/11

3:25 pm-6:55 am

2 stops23h 30m

Sydney Kingsford Smith

Sun 5/31

9:30 am-5:29 pm

2 stops23h 59m

$1,153

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 32 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 $858). 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 December 18, 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 19h 56m. Fly via Air Canada, American Airlines, 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 cheapest airlines to fly from Colorado to Sydney one-way?

    $331 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 $405, respectively.

  • 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 $858). 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 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Fiji AirwaysCheapest$684Average$1,356FlexibilityNo cancel feeOn-time74%
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
DeltaCheapest$786Average$1,404FlexibilityNo cancel feeOn-timeN/A
Qantas AirwaysCheapest$803Average$897FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$826Average$857FlexibilityNo cancel feeOn-time71%
Air New ZealandCheapest$834Average$1,266FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$853Average$1,459FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$980Average$1,269FlexibilityNo cancel feeOn-time67%

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