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Cheap flights from Denver to Sydney from $687

DEN — SYD
7 Oct — 14 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

Wed 28/1013:10 -
1 stop24h 15m
Wed 4/1114:00 -
2 stops43h 11m
Deal found 3/9$1,191
Wed 4/1122:55 -
1 stop37h 30m
Tue 10/1114:00 -
2 stops21h 35m
Deal found 4/9$1,200
Thu 5/1113:10 -
1 stop23h 15m
Thu 12/1114:00 -
2 stops22h 03m
Deal found 5/9$1,222
Sat 24/1022:55 -
1 stop38h 30m
Wed 11/1114:00 -
2 stops43h 11m
Deal found 6/9$1,224
Tue 20/1013:10 -
1 stop25h 20m
Tue 3/1114:00 -
2 stops21h 35m
Deal found 3/9$1,231
Mon 19/1022:55 -
1 stop39h 35m
Sun 1/1114:00 -
2 stops37h 45m
Deal found 7/9$1,253
Sat 17/1022:55 -
1 stop39h 35m
Mon 2/1114:00 -
2 stops43h 11m
Deal found 5/9$1,256
Wed 21/1022:55 -
1 stop39h 35m
Sun 1/1114:00 -
2 stops37h 45m
Deal found 7/9$1,261
Tue 20/1009:00 -
1 stop29h 30m
Fri 6/1114:00 -
2 stops22h 03m
Deal found 7/9$1,271
Sat 17/1022:55 -
1 stop39h 35m
Wed 4/1114:00 -
2 stops21h 35m
Deal found 5/9$1,278

Find flight deals from Denver to Sydney

Round-trip from

$1,191

One-way from

$687

Popular in

December

Cheapest in

May

Average price

$1,855
28/10-4/11
  • 28/10-4/11
  • 3 total stops
  • 67h 26m total
  • Denver to Sydney
Search Deals
26/9-31/12
  • 26/9-31/12
  • 1 total stop
  • 26h 20m total
  • Denver to Sydney
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($429 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($74 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 1/12

10:25-06:25

1 stop26h 00m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$751

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 26/9

13:10-07:30

1 stop26h 20m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$798

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 21/11

06:00-06:25

2 stops30h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$863

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 1/3

17:00-18:50

2 stops55h 50m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,025

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 30/11

20:00-19:45

2 stops53h 45m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,056

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Wed 30/9

07:00-20:10

2 stops45h 10m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,142

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Wed 25/11

07:20-07:15

2 stops53h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,142

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 29/9

10:46-06:10

2 stops51h 24m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,142
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

$1,148

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sun 11/10

20:30-20:10

2 stops54h 40m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,198

Flights are sorted by cheapest return flights first.

Deals found on 4/9

Showing 1-10 of 21 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 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 $1,637). Flying from Denver to Sydney in December is currently the most expensive (average of $2,494). 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 typical for this route at the moment.

Denver to Sydney flights typically cost between $1,166 and $2,073 in October.
The cheapest return price found within the last 5 days was $1,191 on Multiple Airlines (28 Oct–4 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
1,090 reviews
Check prices

Entertainment

7.2

Crew

8.1

Food

7.0

Comfort

7.4

Overall

7.5

Boarding

7.7

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
1,090 reviews
Qantas Airways
7.5
Good
1,090 reviews
Check prices

Entertainment

7.2

Crew

8.1

Food

7.0

Comfort

7.4

Overall

7.5

Boarding

7.7

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?

    Delta can get you from Denver to Sydney in just under 18h 51m. Your travel time can differ by up to . There are 13435 km between Denver and Sydney.

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

    According to our current data, Qantas Airways ($1,252), 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, May is the cheapest month in which you can book a flight from Denver to Sydney (average of $1,637). Flying from Denver to Sydney in December is currently the most expensive (average of $2,494). 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
Katoomba
Lithgow
Cronulla
Terrigal
Leura
Randwick
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$1,252Average$1,939FlexibilityNo 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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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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