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Cheap flights from Colorado to Sydney from $589

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
2 Jul — 9 Jul1
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 27 June 2025.

Round-trip from

$1,157

One-way from

$589

Popular in

December

Cheapest in

April

Average price

$1,379
Qantas Airways
  • Qantas Airways
  • 6/8-13/8
  • 2 total stops
  • 39h 25m 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 ($394 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($68 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 27 June 2025.

Tue 2/921:23DEN - SYD
2 stops41h 42mAlaska Airlines
Tue 30/909:10SYD - DEN
1 stop18h 13mAlaska Airlines
Deal found 26/6$1,147
Wed 6/817:59DEN - SYD
1 stop21h 06mQantas Airways
Wed 13/809:10SYD - DEN
1 stop18h 19mQantas Airways
Deal found 26/6$1,157
Wed 6/814:47DEN - SYD
2 stops24h 18mAmerican Airlines
Wed 13/809:10SYD - DEN
2 stops24h 28mAmerican Airlines
Deal found 26/6$1,232
Tue 30/1212:59DEN - SYD
1 stop23h 51mDelta
Tue 13/111:05SYD - DEN
1 stop25h 04mDelta
Deal found 25/6$1,284
Sat 27/908:00COS - SYD
2 stops30h 35mDelta
Fri 3/1009:25SYD - COS
2 stops29h 04mDelta
Deal found 25/6$1,300
Fri 17/1018:05DEN - SYD
1 stop21h 15mAir Canada
Fri 14/1111:20SYD - DEN
2 stops23h 15mAir Canada
Deal found 26/6$1,466
Fri 1/822:55DEN - SYD
1 stop40h 10mMultiple Airlines
Mon 11/809:10SYD - DEN
1 stop21h 15mMultiple Airlines
Deal found 26/6$1,627
Sat 15/1116:59DEN - SYD
2 stops25h 31mFiji Airways
Sat 6/1214:30SYD - DEN
2 stops23h 25mFiji Airways
Deal found 27/6$1,784
Mon 4/819:06ASE - SYD
1 stop19h 54mUnited Airlines
Wed 20/810:20SYD - ASE
1 stop25h 23mUnited Airlines
Deal found 27/6$1,804
Tue 5/812:05ASE - SYD
1 stop26h 30mDelta
Wed 20/809:25SYD - ASE
1 stop24h 26mDelta
Deal found 27/6$1,806
Tue 5/807:40ASE - SYD
2 stops34h 55mAir New Zealand
Wed 20/809:55SYD - ASE
2 stops26h 11mAir New Zealand
Deal found 26/6$1,887
Wed 27/816:46DEN - SYD
2 stops23h 59mAir New Zealand
Tue 2/918:20SYD - DEN
2 stops41h 33mAir New Zealand
Deal found 27/6$1,907

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 27 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 2/9

21:23-07:05

2 stops41h 42m

Sydney Kingsford Smith

Tue 30/9

09:10-11:23

1 stop18h 13m

$1,147

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 6/8

17:59-07:05

1 stop21h 06m

Sydney Kingsford Smith

Wed 13/8

09:10-11:29

1 stop18h 19m

$1,157

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 6/8

14:47-07:05

2 stops24h 18m

Sydney Kingsford Smith

Wed 13/8

09:10-17:38

2 stops24h 28m

$1,232

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 21/10

19:15-07:35

1 stop19h 20m

Sydney Kingsford Smith

Tue 18/11

11:05-18:09

1 stop25h 04m

$1,286

Colorado SpringsSydney

COS - SYD

COSSYD

Colorado Springs

Sat 27/9

08:00-06:35

2 stops30h 35m

Sydney Kingsford Smith

Fri 3/10

09:25-22:29

2 stops29h 04m

$1,300

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 17/10

18:05-08:20

1 stop21h 15m

Sydney Kingsford Smith

Fri 14/11

11:20-16:35

2 stops23h 15m

$1,466

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 1/8

22:55-07:05

1 stop40h 10m

Sydney Kingsford Smith

Mon 11/8

09:10-14:25

1 stop21h 15m

$1,627

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

$1,784

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Mon 4/8

19:06-07:00

1 stop19h 54m

Sydney Kingsford Smith

Wed 20/8

10:20-19:43

1 stop25h 23m

$1,804

AspenSydney

ASE - SYD

ASESYD

Aspen Pitkin County

Tue 5/8

12:05-06:35

1 stop26h 30m

Sydney Kingsford Smith

Wed 20/8

09:25-17:51

1 stop24h 26m

$1,806

Flights are sorted by cheapest return flights first.

Deals found on 26/6

Showing 1-10 of 33 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 27 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.

How much does it cost for a return flight from Colorado to Sydney?

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 27 June 2025.
See what other customers who have flown with ANA, Singapore Airlines, andFiji Airways from Colorado to Sydney have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
ANA
8.3
Very Good
887 reviews
Check prices

Entertainment

7.9

Boarding

8.5

Crew

8.7

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
ANA
8.3
Very Good
887 reviews
ANA
8.3
Very Good
887 reviews
Check prices

Entertainment

7.9

Boarding

8.5

Crew

8.7

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Singapore Airlines
8.1
Very Good
1,315 reviews
ANA
8.3
Very Good
887 reviews
Check prices

Entertainment

7.9

Boarding

8.5

Crew

8.7

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Fiji Airways
8.0
Very Good
202 reviews
ANA
8.3
Very Good
887 reviews
Check prices

Entertainment

7.9

Boarding

8.5

Crew

8.7

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Delta
8.0
Very Good
7,963 reviews
ANA
8.3
Very Good
887 reviews
Check prices

Entertainment

7.9

Boarding

8.5

Crew

8.7

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.
Air New Zealand
8.0
Very Good
485 reviews
ANA
8.3
Very Good
887 reviews
Check prices

Entertainment

7.9

Boarding

8.5

Crew

8.7

Overall

8.3

Comfort

8.2

Food

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2025

SEA - HND

The flight with ANA was fantastic. Huge plane but was boarded swiftly and efficiently with a lot of crew members engaged to expedite the process. The onboard crew was polite and considerate and constantly doing things to serve passengers. The plane was new and in great working order-- definitely more spacious than the Alaska plane we took from SLC. Food was solid, not great. Lots of movie options.

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 $589. Delta flights start at $633 while deals on American Airlines start at $639 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 Colorado Springs - Sydney Kingsford Smith or Aspen Pitkin County - 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
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Cronulla
Terrigal
Lithgow
Bondi Beach
Leura

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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 27 June 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$305Average$1,423FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
United AirlinesCheapest$473Average$2,156FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Qantas AirwaysCheapest$1,257Average$2,029FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

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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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