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Cheap flights from Denver to Sydney from $699

DEN — SYD
24 Oct — 31 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Denver to Sydney

Enter your travel dates to find the best prices.

Cheapest flights from Denver to Sydney

Mon 9/1113:10 -
2 stops29h 25m
Mon 16/1114:00 -
3 stops37h 07m
Deal found 23/9$1,422
Mon 26/1009:00 -
2 stops34h 35m
Mon 9/1114:00 -
3 stops46h 10m
Deal found 19/9$1,444
Sat 26/913:10 -
2 stops30h 40m
Tue 3/1114:00 -
3 stops27h 49m
Deal found 22/9$1,477
Mon 2/1113:10 -
2 stops25h 25m
Sat 14/1111:50 -
2 stops23h 45m
Deal found 23/9$1,505
Sun 1/1113:10 -
2 stops29h 25m
Sat 7/1114:00 -
3 stops37h 40m
Deal found 21/9$1,528
Sat 26/913:10 -
2 stops30h 40m
Fri 16/1014:15 -
3 stops35h 55m
Deal found 22/9$1,550
Tue 3/1109:10 -
1 stop29h 50m
Tue 17/1111:10 -
1 stop22h 01m
Deal found 21/9$1,552
Tue 27/1009:10 -
1 stop30h 50m
Wed 18/1111:10 -
1 stop22h 01m
Deal found 19/9$1,571

Find flight deals from Denver to Sydney

Round-trip from

$1,422

One-way from

$699

Popular in

December

Cheapest in

May

Average price

$1,676
9/11-16/11
  • 9/11-16/11
  • 5 total stops
  • 66h 32m total
  • Denver to Sydney
Search Deals
7/11-31/12
  • 7/11-31/12
  • 1 total stop
  • 37h 30m total
  • Denver to Sydney
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($483 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($80 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Denver to Sydney that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 20/10

22:55-07:30

1 stop39h 35m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$700

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 30/11

22:29-06:25

1 stop37h 56m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$853

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Thu 15/10

09:00-09:00

2 stops31h 00m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$975

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 24/11

21:55-19:45

2 stops27h 50m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,065

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 23/11

07:20-07:15

2 stops53h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,163

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sun 11/10

22:45-07:30

3 stops39h 45m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,175
Fastest return journey

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 1/12

19:00-09:35

1 stop20h 35m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,180

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sun 28/2

15:45-10:35

2 stops24h 50m

Sydney Kingsford Smith

Sun 14/3

11:50-21:53

1 stop28h 03m

$1,849

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 23/11

19:59-08:30

1 stop18h 31m

Sydney Kingsford Smith

Sun 13/12

10:40-00:02

1 stop31h 22m

$2,201

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 9/11

19:30-19:25

2 stops53h 55m

Sydney Kingsford Smith

Thu 12/11

21:35-17:25

2 stops37h 50m

$2,259

Flights are sorted by cheapest return flights first.

Deals found on 21/9

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Best time to book a flight from Denver to Sydney

Have a flexible travel schedule? Discover the best time to fly to Sydney from Denver with our price prediction graph.
Estimated return price

Cheapflights Insights

Everything you need to know about your flight from Denver to Sydney

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

The best time to book flights from Denver to Sydney is 22 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Denver to Sydney?

Currently, May is the cheapest month in which you can book a flight from Denver to Sydney (average of $1,669). Flying from Denver to Sydney in December is currently the most expensive (average of $2,542). 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 for a return flight from Denver to Sydney?

Airfare is below average for this route at the moment.

Denver to Sydney flights typically cost between $1,559 and $2,156 in November.
The cheapest return price found within the last 5 days was $1,422 on Multiple Airlines (9 Nov–16 Nov).

Reviews of airlines servicing Sydney

See what other customers who have flown with Qantas Airways from Denver to Sydney have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Qantas Airways
7.5
Good
1,103 reviews
Check prices

Comfort

7.4

Boarding

7.7

Crew

8.1

Overall

7.5

Entertainment

7.2

Food

7.0

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.
Qantas Airways
7.5
Good
1,103 reviews
Qantas Airways
7.5
Good
1,103 reviews
Check prices

Comfort

7.4

Boarding

7.7

Crew

8.1

Overall

7.5

Entertainment

7.2

Food

7.0

Reviews

1 / 20
4.0
Okay

Robyn,Aug 2026

LAX - SYD

I was flabbergasted when the crew completely missed me in the distribution of food and drinks in Business Class - even after they looked twice at my opened table. However - this has happened to me on my last longhaul QF flight and with the same hosty (older woman with curly bob). She obviously cannot handly the stress of initial boarding as both times she has come back to me with an apology. When compared to our usual Business/ First longhauls with Qatar or Emirates, Qantas leave ALOT to be desired. I would highly recommend going with another airline. BTW I'm a 4th gen Aussie and previous Qantas employee - I would love to love them if they provided service but they just dont.

Related info for your journey

  • How long is the flight from Denver to Sydney?

    Air New Zealand, Delta, and Turkish Airlines can get you from Denver to Sydney in just under 18h 31m. Your travel time can differ by up to 35h 24m. There are 13435 km between Denver and Sydney. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from Denver to Sydney round-trip?

    According to our current data, Qantas Airways ($1,277), offers the cheapest pricing from Denver to Sydney. Qantas Airways is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Denver to Sydney that include hotel bookings?

    Yes. In addition to deals on Denver to Sydney flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Denver to Sydney?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Denver to Sydney.

  • Can I find deals for business class flights from Denver to Sydney?

    Yes. Cheapflights offers flight deals from Denver 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 Denver to Sydney?

    Currently, May is the cheapest month in which you can book a flight from Denver to Sydney (average of $1,669). Flying from Denver to Sydney in December is currently the most expensive (average of $2,542). 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 Sydney?

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

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Denver to Sydney

AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,277Average$1,976FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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Deals for Denver to Sydney flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Denver to Sydney.

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Need flexible booking options for your flight to Sydney from Denver? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

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