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Cheap flights from Denver to Sydney from $708

DEN — SYD
3 Nov — 10 Nov1
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

Sat 31/1013:10 -
2 stops39h 55m
Sat 7/1114:00 -
3 stops37h 40m
Deal found 30/9$1,387
Wed 28/1013:10 -
2 stops30h 25m
Wed 4/1114:00 -
2 stops21h 35m
Deal found 30/9$1,420
Sun 1/1113:10 -
2 stops29h 25m
Mon 16/1114:00 -
3 stops37h 07m
Deal found 30/9$1,461
Mon 2/1109:10 -
2 stops33h 25m
Mon 16/1114:00 -
2 stops22h 03m
Deal found 2/10$1,503
Sun 1/1113:10 -
2 stops29h 25m
Wed 11/1114:00 -
2 stops21h 35m
Deal found 30/9$1,558
Mon 16/1112:54 -
2 stops29h 41m
Mon 23/1114:00 -
2 stops24h 16m
Deal found 2/10$1,561
Tue 8/1215:55 -
2 stops22h 40m
Mon 28/1214:05 -
2 stops25h 33m
Deal found 3/10$1,661

Find flight deals from Denver to Sydney

Round-trip from

$1,387

One-way from

$698

Popular in

December

Cheapest in

April

Average price

$2,107
31/10-7/11
  • 31/10-7/11
  • 5 total stops
  • 77h 35m total
  • Denver to Sydney
Search Deals
9/12-31/12
  • 9/12-31/12
  • 1 total stop
  • 22h 39m total
  • Denver to Sydney
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($526 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($81 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 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

Fri 30/10

22:55-10:10

2 stops42h 15m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$864
Fastest return journey

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Wed 28/10

13:10-06:25

1 stop24h 15m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$953

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 26/10

22:55-06:25

1 stop38h 30m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$953

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sun 27/12

17:55-22:15

3 stops58h 20m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,117

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sun 22/11

18:51-20:50

2 stops55h 59m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,174

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 26/12

22:55-22:15

3 stops53h 20m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,177

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Fri 20/11

22:29-19:45

2 stops27h 16m

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

Wed 6/1

19:30-19:25

2 stops53h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,213

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 11/1

19:30-19:25

2 stops53h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,214

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 28/12

19:30-19:25

2 stops53h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,256

Flights are sorted by cheapest return flights first.

Deals found on 2/10

Showing 1-10 of 22 resultsSorted by cheapest first
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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 31 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, April is the cheapest month in which you can book a flight from Denver to Sydney (average of $1,696). Flying from Denver to Sydney in December is currently the most expensive (average of $2,582). 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 $1,983 and $2,275 in October.
The cheapest return price found within the last 5 days was $1,387 on Multiple Airlines (31 Oct–7 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

Boarding

7.7

Comfort

7.4

Entertainment

7.2

Food

7.0

Overall

7.5

Crew

8.1

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

Boarding

7.7

Comfort

7.4

Entertainment

7.2

Food

7.0

Overall

7.5

Crew

8.1

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

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

    According to our current data, Qantas Airways ($1,297), offers the cheapest pricing from Denver to Sydney. Qantas Airways is 34% 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, April is the cheapest month in which you can book a flight from Denver to Sydney (average of $1,696). Flying from Denver to Sydney in December is currently the most expensive (average of $2,582). 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$1,297Average$2,008FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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