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Cheap flights from Denver to Sydney from $449

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 11/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Denver to Sydney

Cheap round-trip flights

Alaska Airlines Logo
8:02 pm - 7:45 pmDEN-SYD
29h 43m2 stops
Alaska Airlines Logo
9:40 pm - 12:27 pmSYD-DEN
32h 47m2 stops
$1,015Alaska Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
Alaska Airlines Logo
6:20 pm - 7:45 pmDEN-SYD
32h 25m2 stops
Alaska Airlines Logo
9:40 pm - 1:27 pmSYD-DEN
32h 47m2 stops
$1,032Alaska Airlines
Find Deal
Wed, Oct 22 - Sat, Nov 1
Alaska Airlines Logo
6:20 pm - 7:45 pmDEN-SYD
32h 25m2 stops
Alaska Airlines Logo
9:40 pm - 1:27 pmSYD-DEN
32h 47m2 stops
$1,033Alaska Airlines
Find Deal
Wed, Oct 22 - Sat, Nov 1
Multiple Airlines Logo
10:00 am - 6:10 amDEN-SYD
26h 10m2 stops
Multiple Airlines Logo
5:45 pm - 6:28 pmSYD-DEN
18h 43m1 stop
$1,096Multiple Airlines
Find Deal
Tue, Nov 11 - Thu, Nov 20
Multiple Airlines Logo
10:00 am - 6:10 amDEN-SYD
26h 10m2 stops
Multiple Airlines Logo
5:45 pm - 10:18 amSYD-DEN
34h 33m1 stop
$1,112Multiple Airlines
Find Deal
Tue, Nov 11 - Tue, Nov 18
Hawaiian Airlines Logo
12:35 pm - 7:45 pmDEN-SYD
37h 10m2 stops
Hawaiian Airlines Logo
9:40 pm - 11:39 amSYD-DEN
31h 59m2 stops
$1,153Hawaiian Airlines
Find Deal
Sun, Feb 1 - Sat, Feb 28
Air New Zealand Logo
4:03 pm - 8:45 amDEN-SYD
22h 42m2 stops
Air New Zealand Logo
1:55 pm - 6:23 pmSYD-DEN
22h 28m2 stops
$1,161Air New Zealand
Find Deal
Wed, Feb 25 - Wed, Mar 4
Air New Zealand Logo
4:05 pm - 8:45 amDEN-SYD
22h 40m2 stops
Air New Zealand Logo
1:55 pm - 5:58 pmSYD-DEN
22h 03m2 stops
$1,164Air New Zealand
Find Deal
Wed, Nov 12 - Wed, Nov 26
Hawaiian Airlines Logo
3:02 pm - 7:45 pmDEN-SYD
35h 43m2 stops
Hawaiian Airlines Logo
9:40 pm - 11:53 amSYD-DEN
31h 13m2 stops
$1,228Hawaiian Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 21
Air Canada Logo
8:45 am - 9:35 amDEN-SYD
30h 50m1 stop
Air Canada Logo
11:20 am - 12:37 pmSYD-DEN
19h 17m1 stop
$1,249Air Canada
Find Deal
Sun, Nov 9 - Sat, Nov 15

Alaska Airlines flights from Denver to Sydney

Our best Alaska Airlines deals on Denver to Sydney flight tickets
Alaska Airlines
Nov 11
DEN8:02 pmDenver Intl
29h 43m
2 stops
SYD7:45 pmSydney Kingsford Smith
Nov 18
SYD9:40 pmSydney Kingsford Smith
32h 47m
2 stops
DEN12:27 pmDenver Intl
$1,015
Find similar
Alaska Airlines
Oct 22
DEN6:20 pmDenver Intl
32h 25m
2 stops
SYD7:45 pmSydney Kingsford Smith
Nov 1
SYD9:40 pmSydney Kingsford Smith
32h 47m
2 stops
DEN1:27 pmDenver Intl
$1,032
Find similar
Alaska Airlines
Oct 22
DEN6:20 pmDenver Intl
32h 25m
2 stops
SYD7:45 pmSydney Kingsford Smith
Nov 1
SYD9:40 pmSydney Kingsford Smith
32h 47m
2 stops
DEN1:27 pmDenver Intl
$1,033
Find similar

Air New Zealand flights from Denver to Sydney

Our best Air New Zealand deals on Denver to Sydney flight tickets
Air New Zealand
Feb 25
DEN4:03 pmDenver Intl
22h 42m
2 stops
SYD8:45 amSydney Kingsford Smith
Mar 4
SYD1:55 pmSydney Kingsford Smith
22h 28m
2 stops
DEN6:23 pmDenver Intl
$1,161
Find similar
Air New Zealand
Nov 12
DEN4:05 pmDenver Intl
22h 40m
2 stops
SYD8:45 amSydney Kingsford Smith
Nov 26
SYD1:55 pmSydney Kingsford Smith
22h 03m
2 stops
DEN5:58 pmDenver Intl
$1,164
Find similar
Air New Zealand
Nov 10
DEN4:05 pmDenver Intl
22h 40m
2 stops
SYD8:45 amSydney Kingsford Smith
Nov 24
SYD1:55 pmSydney Kingsford Smith
22h 03m
2 stops
DEN5:58 pmDenver Intl
$1,166
Find similar

momondo Fare Finder

 
Customize 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 832,500 searches. Data last updated September 16, 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 11/11

8:02 pm-7:45 pm

2 stops29h 43m

Sydney Kingsford Smith

Tue 11/18

9:40 pm-12:27 pm

2 stops32h 47m

$1,015

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 10/22

6:20 pm-7:45 pm

2 stops32h 25m

Sydney Kingsford Smith

Sat 11/1

9:40 pm-1:27 pm

2 stops32h 47m

$1,032

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 10/22

6:20 pm-7:45 pm

2 stops32h 25m

Sydney Kingsford Smith

Sat 11/1

9:40 pm-1:27 pm

2 stops32h 47m

$1,033

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 11/11

10:00 am-6:10 am

2 stops26h 10m

Sydney Kingsford Smith

Thu 11/20

5:45 pm-6:28 pm

1 stop18h 43m

$1,096

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 11/11

10:00 am-6:10 am

2 stops26h 10m

Sydney Kingsford Smith

Tue 11/18

5:45 pm-10:18 am

1 stop34h 33m

$1,112

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 2/1

12:35 pm-7:45 pm

2 stops37h 10m

Sydney Kingsford Smith

Sat 2/28

9:40 pm-11:39 am

2 stops31h 59m

$1,153

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 2/25

4:03 pm-8:45 am

2 stops22h 42m

Sydney Kingsford Smith

Wed 3/4

1:55 pm-6:23 pm

2 stops22h 28m

$1,161

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 11/12

4:05 pm-8:45 am

2 stops22h 40m

Sydney Kingsford Smith

Wed 11/26

1:55 pm-5:58 pm

2 stops22h 03m

$1,164

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Tue 10/14

3:02 pm-7:45 pm

2 stops35h 43m

Sydney Kingsford Smith

Tue 10/21

9:40 pm-11:53 am

2 stops31h 13m

$1,228

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 11/9

8:45 am-9:35 am

1 stop30h 50m

Sydney Kingsford Smith

Sat 11/15

11:20 am-12:37 pm

1 stop19h 17m

$1,249

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

In general, April is the cheapest month to fly from Denver to Sydney. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $871. If you are unable to visit Sydney during the month of April, then departing from Denver during the month May is also very affordable. Most momondo users find prices during this month for around $874.

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

The cheapest day to depart from Denver to Sydney is on a Tuesday when prices can be found for as low as $1,197. The most expensive day to fly to Sydney is Thursday, with ticket prices averaging around $1,362.

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 noon. momondo users have found flights departing from Denver to Sydney at noon for as low as $933. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Sydney are more costly in the evening, with an average ticket price of $1,292. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $1,065 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sydney from Denver for as low as $924 on momondo.

How have Denver to Sydney flight prices changed over time?

As of September 2025, prices for Denver to Sydney flights are approximately 45% 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 round-trip 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.
Search flight deals

  • How far is Denver Intl to Sydney Kingsford Smith by plane?

    Denver Intl and Sydney Kingsford Smith are 8325.4 mi apart from one another. A reasonable flight in good conditions will take 22h 40m.

  • 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 are updated 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?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to 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 necessary travel and health documents for your Sydney Kingsford Smith Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking 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
Alaska AirlinesPriceFrom $745Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines flights
DeltaPriceFrom $786Free CancellationRating
7.9
7,957 reviews
Search Delta flights
Qantas AirwaysPriceFrom $806Free CancellationRating
7.5
907 reviews
Search Qantas Airways flights
American AirlinesPriceFrom $832Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
Air New ZealandPriceFrom $834Free CancellationRating
8.0
505 reviews
Search Air New Zealand flights
Air CanadaPriceFrom $1,009Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
United AirlinesPriceFrom $1,261Free CancellationRating
7.4
8,924 reviews
Search United Airlines flights

Traveling to a place near Sydney?

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

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Sydney from Denver.

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

Yes. momondo enables you to select and highlight flights to Sydney from Denver with this policy.

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?

If you are not ready to book a flight from Denver to Sydney now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Sydney and let you know when they change.

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