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Cheap flights from Denver to Sydney from $744

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/9. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
16 Sep — 23 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
Explore the most affordable flight options available from Denver to Sydney. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 August 2026.

Wed 16/912:42 -
2 stops31h 08m
Wed 7/1006:05 -
3 stops34h 39m
Deal found 14/8$1,371
Wed 4/1112:02 -
2 stops30h 48m
Wed 18/1109:55 -
2 stops26h 17m
Deal found 16/8$1,383
Mon 9/1112:02 -
2 stops30h 33m
Thu 12/1114:00 -
2 stops28h 25m
Deal found 12/8$1,397
Tue 10/1112:02 -
2 stops30h 33m
Fri 13/1106:00 -
2 stops36h 25m
Deal found 12/8$1,443
Mon 28/909:43 -
3 stops34h 07m
Tue 6/1014:15 -
3 stops26h 29m
Deal found 15/8$1,466
Sun 1/1112:02 -
2 stops30h 33m
Sun 8/1114:00 -
2 stops28h 25m
Deal found 13/8$1,555
Sun 25/1013:10 -
2 stops30h 40m
Sat 7/1111:50 -
2 stops24h 22m
Deal found 13/8$1,556

Find flight deals from Denver to Sydney

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Sydney (SYD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 17 August 2026.

Round-trip from

$1,371

One-way from

$744

Popular in

December

Cheapest in

May

Average price

$1,922
16/9-7/10
  • 16/9-7/10
  • 5 total stops
  • 65h 47m total
  • Denver to Sydney
Search Deals
22/9
  • 22/9
  • 3 total stops
  • 41h 05m total
  • Denver to Sydney
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($421 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($80 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Denver to Sydney that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 17 August 2026.
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 21/1

12:49-19:45

2 stops36h 56m

Sydney Kingsford Smith

Sun 31/1

21:40-18:33

2 stops38h 53m

$2,108

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 17/11

12:45-08:30

1 stop25h 45m

Sydney Kingsford Smith

Tue 1/12

10:40-11:47

1 stop19h 07m

$2,129

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Thu 21/1

16:22-20:50

2 stops34h 28m

Sydney Kingsford Smith

Sun 14/2

11:05-15:16

2 stops46h 11m

$2,493

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Fri 11/12

19:45-09:05

1 stop19h 20m

Sydney Kingsford Smith

Fri 1/1

11:20-19:49

1 stop26h 29m

$2,622
Fastest return journey

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Fri 18/12

19:49-08:30

1 stop18h 41m

Sydney Kingsford Smith

Mon 28/12

10:40-18:10

1 stop25h 30m

$3,574

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Fri 18/12

13:32-09:05

1 stop25h 33m

Sydney Kingsford Smith

Mon 28/12

11:50-20:07

1 stop26h 17m

$3,609

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Tue 17/11

06:25-17:55

3 stops41h 30m

Sydney Kingsford Smith

Tue 1/12

15:50-22:59

3 stops49h 09m

$3,822

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Wed 9/9

15:15-19:15

3 stops60h 00m

Sydney Kingsford Smith

Mon 21/9

11:00-11:22

2 stops40h 22m

$4,404

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 5/12

12:45-21:15

2 stops38h 30m

Sydney Kingsford Smith

Thu 31/12

15:50-22:38

3 stops48h 48m

$4,462

DenverSydney

DEN Denver Intl - SYD Sydney Kingsford Smith

DENSYD

Denver Intl

Sat 7/11

14:27-06:55

3 stops46h 28m

Sydney Kingsford Smith

Fri 13/11

16:20-15:10

2 stops40h 50m

$4,848

Flights are sorted by cheapest return flights first.

Deals found on 16/8

Showing 1-10 of 18 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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 $1,665). Flying from Denver to Sydney in December is currently the most expensive (average of $2,536). 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 $1,387 and $2,543 in September.
The cheapest return price found within the last 5 days was $1,371 on Multiple Airlines (16 Sept–7 Oct).

Reviews of airlines servicing Sydney

Get insights into the airlines that provide service to Sydney. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sydney. Reviews last updated 17 August 2026.
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
1,083 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Overall

7.5

Crew

8.1

Food

7.0

Comfort

7.4

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
1,083 reviews
Qantas Airways
7.5
Good
1,083 reviews
Check prices

Entertainment

7.2

Boarding

7.7

Overall

7.5

Crew

8.1

Food

7.0

Comfort

7.4

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

Find useful and relevant information for your journey from Denver to Sydney. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Denver to Sydney?

    Delta, Cathay Pacific, and United Airlines can get you from Denver to Sydney in just under 19h 20m. Your travel time can differ by up to 15h 08m. 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 ($1,274), 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 $1,665). Flying from Denver to Sydney in December is currently the most expensive (average of $2,536). 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
Randwick
Terrigal
Leura
Bondi Beach
Coogee

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Denver to Sydney

Discover the top airline that operate flights from Denver to Sydney. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 647,157 searches. Data last updated 17 August 2026.
AirlineCheapestAverageFlexibilityOn-time
Qantas AirwaysCheapest$1,274Average$1,971FlexibilityNo cancel feeOn-time74%
Search Qantas Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Denver to Sydney?

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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