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Cheap flights from Denver to Sydney from $818

DEN — SYD
24 Nov — 1 Dec1
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 28/1011:39 -
2 stops27h 56m
Tue 3/1111:20 -
2 stops24h 43m
Deal found 22/10$1,436
Mon 26/1015:37 -
2 stops23h 58m
Sun 8/1111:20 -
1 stop19h 23m
Deal found 21/10$1,439
Mon 26/1015:37 -
2 stops23h 58m
Wed 11/1111:20 -
2 stops24h 43m
Deal found 22/10$1,443
Tue 1/1209:50 -
2 stops32h 45m
Tue 15/1214:00 -
2 stops23h 45m
Deal found 21/10$1,460
Mon 26/1008:15 -
1 stop31h 20m
Wed 11/1111:20 -
2 stops39h 17m
Deal found 24/10$1,477
Sat 24/1012:05 -
1 stop27h 30m
Mon 2/1111:20 -
1 stop19h 00m
Deal found 21/10$1,490
Sun 6/1213:46 -
2 stops38h 19m
Sun 13/1214:50 -
3 stops36h 26m
Deal found 22/10$1,499

Find flight deals from Denver to Sydney

Round-trip from

$1,389

One-way from

$818

Popular in

December

Cheapest in

April

Average price

$2,014
3/2-18/2
  • 3/2-18/2
  • 3 total stops
  • 46h 22m total
  • Denver to Sydney
Search Deals
8/12-31/12
  • 8/12-31/12
  • 1 total stop
  • 37h 56m total
  • Denver to Sydney
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($594 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($104 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 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
Fastest return journey

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 20/2

14:22-06:25

1 stop22h 03m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$851

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 20/2

07:00-06:25

2 stops29h 25m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$939

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 29/12

22:48-06:25

1 stop37h 37m

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

Wed 30/12

19:30-19:25

2 stops53h 55m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,200

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

$1,240

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Thu 31/12

18:32-19:45

3 stops31h 13m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,589

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 5/1

07:00-13:00

2 stops36h 00m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,766

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 5/1

07:00-09:00

1 stop32h 00m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,920

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 5/1

11:31-09:05

1 stop27h 34m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,925

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 2/1

21:11-06:20

1 stop39h 09m

Sydney Kingsford Smith

Wed 31/12

00:00-07:00

Nonstop0h 00m

$1,954

Flights are sorted by cheapest return flights first.

Deals found on 23/10

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 $1,676). Flying from Denver to Sydney in December is currently the most expensive (average of $2,754). 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 $1,721 and $2,460 in February.
The cheapest return price found within the last 5 days was $1,389 on Multiple Airlines (3 Feb–18 Feb).

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
1,117 reviews
Check prices

Boarding

7.7

Comfort

7.4

Crew

8.1

Food

7.0

Overall

7.5

Entertainment

7.2

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
1,117 reviews
Qantas Airways
7.5
Good
1,117 reviews
Check prices

Boarding

7.7

Comfort

7.4

Crew

8.1

Food

7.0

Overall

7.5

Entertainment

7.2

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?

    Alaska Airlines, Delta, and United Airlines can get you from Denver to Sydney in just under 21h 20m. Your travel time can differ by up to 9h 04m. 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 ($1,243), offers the cheapest pricing from Denver to Sydney. Qantas Airways is 36% 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 $1,676). Flying from Denver to Sydney in December is currently the most expensive (average of $2,754). 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$1,243Average$1,984FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

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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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