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Cheap flights from Denver to Sydney from $658

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to Sydney departing on 20/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Denver to Sydney (DEN-SYD)

Cheap return flights

Alaska Airlines Logo
18:20 - 19:45DEN-SYD
32h 25m2 stops
Alaska Airlines Logo
21:40 - 14:41SYD-DEN
34h 01m2 stops
$1,552Alaska Airlines
Find Deal
Tue, 21 Oct - Tue, 28 Oct
Alaska Airlines Logo
18:20 - 19:45DEN-SYD
32h 25m2 stops
Alaska Airlines Logo
21:40 - 12:27SYD-DEN
31h 47m2 stops
$1,561Alaska Airlines
Find Deal
Tue, 21 Oct - Tue, 28 Oct
Alaska Airlines Logo
20:02 - 19:45DEN-SYD
29h 43m2 stops
Alaska Airlines Logo
21:40 - 11:54SYD-DEN
32h 14m1 stop
$1,572Alaska Airlines
Find Deal
Wed, 12 Nov - Thu, 20 Nov
Alaska Airlines Logo
20:02 - 19:45DEN-SYD
29h 43m2 stops
Alaska Airlines Logo
21:40 - 22:40SYD-DEN
43h 00m2 stops
$1,593Alaska Airlines
Find Deal
Tue, 4 Nov - Fri, 21 Nov
Logo
18:34 - 11:45DEN-SYD
25h 11m2 stops
Logo
06:00 - 00:36SYD-DEN
35h 36m2 stops
$1,597
Find Deal
Fri, 3 Oct - Mon, 6 Oct
Logo
05:30 - 09:50DEN-SYD
59h 20m2 stops
Logo
17:45 - 00:57SYD-DEN
25h 12m1 stop
$1,641
Find Deal
Sun, 26 Oct - Mon, 10 Nov
Air New Zealand Logo
16:05 - 08:45DEN-SYD
22h 40m2 stops
Air New Zealand Logo
13:55 - 17:58SYD-DEN
22h 03m2 stops
$1,761Air New Zealand
Find Deal
Wed, 12 Nov - Wed, 26 Nov
Air New Zealand Logo
13:45 - 08:45DEN-SYD
25h 00m2 stops
Air New Zealand Logo
13:55 - 17:58SYD-DEN
22h 03m2 stops
$1,762Air New Zealand
Find Deal
Mon, 3 Nov - Mon, 24 Nov
Air Canada Logo
11:22 - 08:20DEN-SYD
27h 58m2 stops
Air Canada Logo
10:20 - 16:45SYD-DEN
23h 25m2 stops
$1,785Air Canada
Find Deal
Tue, 21 Oct - Fri, 31 Oct
Air Canada Logo
08:40 - 08:20DEN-SYD
30h 40m1 stop
Air Canada Logo
10:20 - 16:26SYD-DEN
23h 06m1 stop
$1,787Air Canada
Find Deal
Tue, 21 Oct - Tue, 28 Oct

Air New Zealand flights from Denver to Sydney

Our best Air New Zealand deals on Denver to Sydney flight tickets
Air New Zealand
12 Nov
DEN16:05Denver Intl
22h 40m
2 stops
SYD08:45Sydney Kingsford Smith
26 Nov
SYD13:55Sydney Kingsford Smith
22h 03m
2 stops
DEN17:58Denver Intl
$1,761
Find similar
Air New Zealand
3 Nov
DEN13:45Denver Intl
25h 00m
2 stops
SYD08:45Sydney Kingsford Smith
24 Nov
SYD13:55Sydney Kingsford Smith
22h 03m
2 stops
DEN17:58Denver Intl
$1,762
Find similar
Air New Zealand
12 Nov
DEN16:05Denver Intl
22h 40m
2 stops
SYD08:45Sydney Kingsford Smith
26 Nov
SYD11:45Sydney Kingsford Smith
24h 13m
2 stops
DEN17:58Denver Intl
$1,764
Find similar

Alaska Airlines flights from Denver to Sydney

Our best Alaska Airlines deals on Denver to Sydney flight tickets
Alaska Airlines
21 Oct
DEN18:20Denver Intl
32h 25m
2 stops
SYD19:45Sydney Kingsford Smith
28 Oct
SYD21:40Sydney Kingsford Smith
34h 01m
2 stops
DEN14:41Denver Intl
$1,552
Find similar
Alaska Airlines
21 Oct
DEN18:20Denver Intl
32h 25m
2 stops
SYD19:45Sydney Kingsford Smith
28 Oct
SYD21:40Sydney Kingsford Smith
31h 47m
2 stops
DEN12:27Denver Intl
$1,561
Find similar
Alaska Airlines
12 Nov
DEN20:02Denver Intl
29h 43m
2 stops
SYD19:45Sydney Kingsford Smith
20 Nov
SYD21:40Sydney Kingsford Smith
32h 14m
1 stop
DEN11:54Denver Intl
$1,572
Find similar

momondo 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, momondo users made 78,305 searches. Data last updated 10 September 2025.
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

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 21/10

18:20-19:45

2 stops32h 25m

Sydney Kingsford Smith

Tue 28/10

21:40-14:41

2 stops34h 01m

$1,552

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 21/10

18:20-19:45

2 stops32h 25m

Sydney Kingsford Smith

Tue 28/10

21:40-12:27

2 stops31h 47m

$1,561

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 12/11

20:02-19:45

2 stops29h 43m

Sydney Kingsford Smith

Thu 20/11

21:40-11:54

1 stop32h 14m

$1,572

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 4/11

20:02-19:45

2 stops29h 43m

Sydney Kingsford Smith

Fri 21/11

21:40-22:40

2 stops43h 00m

$1,593

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 3/10

18:34-11:45

2 stops25h 11m

Sydney Kingsford Smith

Mon 6/10

06:00-00:36

2 stops35h 36m

$1,597

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 26/10

05:30-09:50

2 stops59h 20m

Sydney Kingsford Smith

Mon 10/11

17:45-00:57

1 stop25h 12m

$1,641

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 12/11

16:05-08:45

2 stops22h 40m

Sydney Kingsford Smith

Wed 26/11

13:55-17:58

2 stops22h 03m

$1,761

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Mon 3/11

13:45-08:45

2 stops25h 00m

Sydney Kingsford Smith

Mon 24/11

13:55-17:58

2 stops22h 03m

$1,762

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 21/10

11:22-08:20

2 stops27h 58m

Sydney Kingsford Smith

Fri 31/10

10:20-16:45

2 stops23h 25m

$1,785

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 21/10

08:40-08:20

1 stop30h 40m

Sydney Kingsford Smith

Tue 28/10

10:20-16:26

1 stop23h 06m

$1,787

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sydney from

How to get the cheapest flight ticket from Denver to Sydney

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Sydney?

The month of April is, on average, the cheapest month to fly to Sydney from Denver, with most prices found around $1,321. If you aren’t able to travel to Sydney during the month of April, then flying in May is also cheap. Prices for this month can be found on momondo for an average of $1,332.

What is the cheapest day to depart on your flight to Sydney?

Our data shows that Wednesday is the least expensive day to fly to Sydney. Tickets to fly out on this day can be as low as $1,725. The most expensive day to fly to Sydney is Tuesday, with ticket prices averaging around $2,343.

What is the cheapest time of day to depart on your flight to Sydney?

According to our data, the cheapest time of day to fly to Sydney is at midday. momondo users have found flights departing from Denver to Sydney at midday for as low as $1,421. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $2,117 on average. Flights to Sydney from Denver in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to Sydney?

You are more likely to see cheaper flights to Sydney from Denver when booking weeks ahead of your departure date. In general, you can expect to find flights to Sydney for around $1,641 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Denver for as low as $1,432 on momondo.

Can stopping save me money on Denver to Sydney flights?

You could potentially save up to 67% on your flight if you consider stops on a Denver to Sydney flight.

How have Denver to Sydney flight prices changed over time?

As of September 2025, prices for Denver to Sydney flights are approximately 39% cheaper when compared to flights at the same time last year.

When to book flights from Denver to Sydney

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Sydney according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Denver to Sydney (DEN to SYD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Denver to Sydney

Direct flights

None
There are no direct flights from Denver to Sydney. There are no popular flight routes from Denver to Sydney.
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  • How far is Denver Intl to Sydney Kingsford Smith by plane?

    There are 13398.4 km between Denver Intl and Sydney Kingsford Smith. Flights usually cover this in 21h 15m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Denver Intl Airport to Sydney Kingsford Smith Airport?

    Prices for flights from Denver Intl Airport to Sydney Kingsford Smith Airport refresh daily.

  • How many operators does momondo search for flights from Denver Intl Airport to Sydney Kingsford Smith Airport?

  • How old do you have to be to fly from Denver Intl Airport to Sydney Kingsford Smith Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Denver Intl Airport to Sydney Kingsford Smith Airport.

  • What documentation or ID do you need to fly to Sydney Kingsford Smith Airport?

    The travel and health documents you'll need for your trip to Sydney Kingsford Smith Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at Sydney Kingsford Smith Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Denver to Sydney?

Best airlines flying from Denver to Sydney

Compare and see reviews for airlines that fly from Denver to Sydney with momondo
Airline
Rating
Free cancellation
Price
American AirlinesPriceFrom $302Free cancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $469Free cancellationRating
7.4
8,937 reviews
Search United Airlines flights
Qantas AirwaysPriceFrom $1,246Free cancellationRating
7.5
905 reviews
Search Qantas Airways flights

Travelling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Terrigal
Penrith
Katoomba
Lithgow
Leura
Manly
Bondi Beach
Coogee
Randwick
Cronulla
Charlestown
Newport
Swansea

Why use momondo?

Why should I use momondo to find a flight deal from Denver to Sydney?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Denver to Sydney for you.

Can I find flights from Denver to Sydney with flexible booking policies on momondo?

momondo does allow users to show only those flights to Sydney from Denver which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Denver to Sydney?

Once you have performed a search for Denver to Sydney flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Denver to Sydney right now. Can momondo alert me if prices change?

Price alerts on flights to Sydney from Denver are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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