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Cheap flights from Denver to Sydney from $735

DEN — SYD
21 Sep — 28 Sep1
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 16/912:42 -
2 stops41h 43m
Tue 22/906:15 -
3 stops33h 29m
Deal found 17/8$1,356
Tue 20/1013:10 -
2 stops30h 40m
Mon 26/1014:00 -
3 stops36h 48m
Deal found 21/8$1,366
Mon 14/913:10 -
2 stops30h 40m
Mon 21/913:15 -
3 stops36h 28m
Deal found 17/8$1,393
Sun 13/909:05 -
2 stops34h 45m
Fri 18/913:15 -
3 stops36h 52m
Deal found 20/8$1,496
Wed 28/1016:05 -
2 stops25h 30m
Tue 3/1111:50 -
2 stops24h 06m
Deal found 19/8$1,578
Wed 4/1113:10 -
2 stops29h 40m
Wed 25/1109:55 -
2 stops32h 52m
Deal found 19/8$1,580
Mon 26/1013:30 -
2 stops26h 05m
Wed 11/1109:55 -
2 stops26h 05m
Deal found 18/8$1,590
Tue 17/1107:55 -
2 stops30h 40m
Tue 1/1219:25 -
2 stops38h 42m
Deal found 17/8$1,615
Wed 18/1111:43 -
2 stops40h 07m
Wed 2/1209:55 -
2 stops24h 12m
Deal found 18/8$1,618

Find flight deals from Denver to Sydney

Round-trip from

$1,356

One-way from

$735

Popular in

December

Cheapest in

May

Average price

$1,902
16/9-22/9
  • 16/9-22/9
  • 5 total stops
  • 75h 12m total
  • Denver to Sydney
Search Deals
12/9
  • 12/9
  • 3 total stops
  • 50h 20m total
  • Denver to Sydney
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($397 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($77 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

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

Thu 5/11

18:37-19:45

2 stops31h 08m

Sydney Kingsford Smith

Sun 15/11

21:40-12:57

2 stops33h 17m

$2,059

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Wed 9/9

19:50-07:20

1 stop19h 30m

Sydney Kingsford Smith

Mon 21/9

09:20-23:08

1 stop29h 48m

$2,071

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Wed 16/9

08:22-06:10

2 stops29h 48m

Sydney Kingsford Smith

Thu 24/9

07:40-21:42

2 stops30h 02m

$2,073

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Wed 9/9

08:22-08:40

2 stops32h 18m

Sydney Kingsford Smith

Mon 21/9

14:05-10:35

2 stops36h 30m

$2,073

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Mon 28/9

19:55-06:50

1 stop18h 55m

Sydney Kingsford Smith

Mon 5/10

10:15-22:41

2 stops29h 26m

$2,115

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 9/1

19:59-06:25

2 stops40h 26m

Sydney Kingsford Smith

Sun 31/1

21:40-14:07

2 stops34h 27m

$2,158

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 28/11

12:45-08:30

1 stop25h 45m

Sydney Kingsford Smith

Fri 18/12

10:40-23:58

1 stop31h 18m

$2,275

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 9/1

06:30-08:30

1 stop32h 00m

Sydney Kingsford Smith

Sun 31/1

10:40-18:10

1 stop25h 30m

$2,808

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Fri 18/12

10:05-09:05

1 stop29h 00m

Sydney Kingsford Smith

Mon 28/12

11:20-14:26

1 stop21h 06m

$3,574
Fastest return journey

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Thu 17/12

19:15-09:05

1 stop19h 50m

Sydney Kingsford Smith

Thu 31/12

11:50-14:37

1 stop20h 47m

$3,644

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 19 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 9 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 $1,648). Flying from Denver to Sydney in December is currently the most expensive (average of $2,510). 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 $1,402 and $2,302 in September.
The cheapest return price found within the last 5 days was $1,356 on Multiple Airlines (16 Sept–22 Sept).

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
1,085 reviews
Check prices

Entertainment

7.2

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.4

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
1,085 reviews
Qantas Airways
7.5
Good
1,085 reviews
Check prices

Entertainment

7.2

Overall

7.5

Crew

8.1

Boarding

7.7

Comfort

7.4

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 Canada and Delta can get you from Denver to Sydney in just under 18h 55m. Your travel time can differ by up to 35m. 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 ($1,261), 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 $1,648). Flying from Denver to Sydney in December is currently the most expensive (average of $2,510). 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
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$1,261Average$1,951FlexibilityNo 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.

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

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.

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

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.

Can Cheapflights notify me if prices for flights from Denver 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 Denver today and book when prices fit your budget.

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