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Cheap flights from Colorado to Sydney from $636

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 27/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
18 Jun — 25 Jun1
1 adult

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 13 June 2025.

Round-trip from

$1,282

One-way from

$636

Popular in

December

Cheapest in

April

Average price

$1,385
Qantas Airways
  • Qantas Airways
  • 28/10-10/11
  • 2 total stops
  • 39h 52m total
  • Colorado to Sydney
Search Deals
Qantas Airways
  • Qantas Airways
  • 27/9
  • 1 total stop
  • 21h 05m total
  • Colorado to Sydney
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($410 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($69 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

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 13 June 2025.

Tue 28/1017:42DEN - SYD
1 stop20h 43mQantas Airways
Mon 10/1111:15SYD - DEN
1 stop19h 09mQantas Airways
Deal found 11/6$1,282
Sun 26/1006:30DEN - SYD
1 stop32h 05mDelta
Wed 12/1111:05SYD - DEN
1 stop18h 25mDelta
Deal found 11/6$1,322
Wed 9/708:15COS - SYD
2 stops30h 20mDelta
Wed 16/709:25SYD - COS
2 stops28h 48mDelta
Deal found 11/6$1,343
Wed 25/611:40DEN - SYD
1 stop27h 50mMultiple Airlines
Sun 7/916:20SYD - DEN
2 stops35h 50mMultiple Airlines
Deal found 11/6$1,434
Thu 24/718:35DEN - SYD
1 stop20h 20mAmerican Airlines
Thu 31/709:10SYD - DEN
2 stops22h 36mAmerican Airlines
Deal found 11/6$1,458
Tue 30/911:22DEN - SYD
2 stops27h 58mAir Canada
Sun 12/1010:20SYD - DEN
2 stops24h 43mAir Canada
Deal found 12/6$1,584
Sat 15/1116:59DEN - SYD
2 stops25h 31mFiji Airways
Sat 6/1214:30SYD - DEN
2 stops23h 25mFiji Airways
Deal found 12/6$1,750
Wed 27/816:46DEN - SYD
2 stops23h 59mAir New Zealand
Sun 7/911:50SYD - DEN
2 stops23h 50mAir New Zealand
Deal found 11/6$1,853
Tue 5/808:09ASE - SYD
2 stops34h 26mAir New Zealand
Wed 20/809:55SYD - ASE
2 stops26h 11mAir New Zealand
Deal found 11/6$1,942
Mon 4/812:05ASE - SYD
1 stop26h 30mDelta
Wed 20/809:25SYD - ASE
1 stop24h 26mDelta
Deal found 11/6$1,950
Mon 4/813:30ASE - SYD
2 stops25h 30mUnited Airlines
Wed 20/810:20SYD - ASE
2 stops22h 34mUnited Airlines
Deal found 13/6$1,957
Thu 30/1018:43DEN - SYD
2 stops32h 02mAlaska Airlines
Tue 11/1121:40SYD - DEN
2 stops30h 51mAlaska Airlines
Deal found 11/6$2,080

Cheapflights Fare Finder

Customise 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 647,157 searches. Data last updated 13 June 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

Tue 28/10

17:42-07:25

1 stop20h 43m

Sydney Kingsford Smith

Mon 10/11

11:15-12:24

1 stop19h 09m

$1,282

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 26/10

06:30-07:35

1 stop32h 05m

Sydney Kingsford Smith

Wed 12/11

11:05-11:30

1 stop18h 25m

$1,322

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Wed 9/7

08:15-06:35

2 stops30h 20m

Sydney Kingsford Smith

Wed 16/7

09:25-22:13

2 stops28h 48m

$1,343

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 25/6

11:40-07:30

1 stop27h 50m

Sydney Kingsford Smith

Sun 7/9

16:20-12:10

2 stops35h 50m

$1,434

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 24/7

18:35-06:55

1 stop20h 20m

Sydney Kingsford Smith

Thu 31/7

09:10-15:46

2 stops22h 36m

$1,458

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 15/11

16:59-12:30

2 stops25h 31m

Sydney Kingsford Smith

Sat 6/12

14:30-19:55

2 stops23h 25m

$1,750

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 12/11

11:50-09:35

1 stop27h 45m

Sydney Kingsford Smith

Wed 26/11

11:20-12:37

1 stop19h 17m

$1,845

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 27/7

07:45-08:45

2 stops33h 00m

Sydney Kingsford Smith

Mon 11/8

08:45-19:40

2 stops26h 55m

$1,853

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Tue 5/8

08:09-10:35

2 stops34h 26m

Sydney Kingsford Smith

Wed 20/8

09:55-20:06

2 stops26h 11m

$1,942

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Mon 4/8

12:05-06:35

1 stop26h 30m

Sydney Kingsford Smith

Wed 20/8

09:25-17:51

1 stop24h 26m

$1,950

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 34 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 return 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, May is the cheapest month in which you can book a flight from Colorado to Sydney (average of $129). Flying from Colorado to Sydney in October is currently the most expensive (average of $171). 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 13 June 2025.

When flying from Colorado to Sydney, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 50.0 - 130.0 inches per month. March is typically the wettest month, when rainfall can reach 130.0 mm. September is typically the driest time to visit Sydney when rainfall is around 50.0 mm.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 22.0 C. Travellers hoping to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 11.0 C).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 13 June 2025.
Read through reviews of airlines operating flights from Colorado to Sydney, such as Air Tahiti Nui, Fiji Airways and Singapore Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very Good
64 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Fiji Airways
8.1
Very Good
194 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Singapore Airlines
8.1
Very Good
1,302 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very Good
7,946 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air New Zealand
8.0
Very Good
483 reviews
Air Tahiti Nui
8.7
Very Good
64 reviews
Check prices

Overall

8.7

Entertainment

7.3

Comfort

8.1

Food

7.8

Boarding

8.7

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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 7.5 km from the city centre, Sydney Kingsford Smith (SYD) is the airport most travelers will use when flying to Sydney from Colorado.

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

    To fly one-way, consider booking your trip with Qantas Airways, which is currently one of the cheapest options available, starting at $636. Delta flights start at $662 while deals on American Airlines start at $694 one-way.

  • What are the most popular routes from Colorado to Sydney?

    The most popular route from Colorado to Sydney is Denver Intl - Sydney Kingsford Smith. You may also consider Aspen Pitkin County - Sydney Kingsford Smith or Colorado Springs - Sydney Kingsford Smith.

  • 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 holiday 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, May is the cheapest month in which you can book a flight from Colorado to Sydney (average of $129). Flying from Colorado to Sydney in October is currently the most expensive (average of $171). 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

Travelling to a place near Colorado?

Book flights to Colorado if you plan to visit one of these locations
Parramatta
Wollongong
Katoomba
Manly
Penrith
Coogee
Randwick
Cronulla
Terrigal
Lithgow
Bondi Beach
Leura
Swansea

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Alternative routes for Colorado to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Colorado to Sydney

Discover the top 3 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 647,157 searches. Data last updated 13 June 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$306Average$1,429FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$475Average$2,242FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,262Average$2,037FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Colorado to Sydney?

Cheapflights helps you search for flights from Colorado to Sydney via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Colorado to Sydney?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Sydney from Colorado.

Can Cheapflights find flights from Colorado to Sydney with no change fees?

Yes! Cheapflights helps users easily find flights from Colorado to Sydney with no change fees.

Can Cheapflights notify me if prices for flights from Colorado to Sydney become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Sydney from Colorado today and book when prices fit your budget.

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