DEN - SYD

$880 Find Cheap Flights from Denver to Sydney

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Denver to Sydney departing on 5/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
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KAYAK searches hundreds of travel sites at once for deals on flights to Sydney

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Sydney, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Denver to Sydney, as well as popular online travel agencies
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Cheap Flight Deals from Denver to Sydney (DEN-SYD)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from Denver to Sydney that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent return flight deals from Denver to Sydney

KAYAK's recommended return flight deals from the most popular airlines that fly from Denver to Sydney.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Air New Zealand Logo
17:59 - 10:35DEN-SYD
24h 36m2 stops
Air New Zealand Logo
09:55 - 19:39SYD-DEN
25h 44m2 stops
$1,709Air New Zealand
Find Deal
Tue, 5 Aug - Tue, 19 Aug
Air New Zealand Logo
15:40 - 08:45DEN-SYD
25h 05m2 stops
Air New Zealand Logo
11:50 - 19:40SYD-DEN
23h 50m2 stops
$1,712Air New Zealand
Find Deal
Mon, 21 Jul - Mon, 11 Aug
Fiji Airways Logo
18:33 - 11:45DEN-SYD
25h 12m2 stops
Fiji Airways Logo
13:15 - 20:16SYD-DEN
23h 01m2 stops
$1,772Fiji Airways
Find Deal
Tue, 20 May - Tue, 27 May
Qantas Airways Logo
18:07 - 07:05DEN-SYD
20h 58m1 stop
Qantas Airways Logo
17:45 - 21:57SYD-DEN
20h 12m1 stop
$1,973Qantas Airways
Find Deal
Sun, 3 Aug - Sun, 17 Aug
Fiji Airways Logo
18:50 - 12:15DEN-SYD
25h 25m2 stops
Fiji Airways Logo
13:15 - 19:57SYD-DEN
22h 42m2 stops
$1,978Fiji Airways
Find Deal
Thu, 14 Aug - Thu, 21 Aug
Qantas Airways Logo
18:22 - 07:05DEN-SYD
20h 43m1 stop
Qantas Airways Logo
09:10 - 11:25SYD-DEN
18h 15m1 stop
$1,981Qantas Airways
Find Deal
Sun, 10 Aug - Sun, 17 Aug
American Airlines Logo
17:33 - 07:30DEN-SYD
21h 57m1 stop
American Airlines Logo
17:45 - 21:41SYD-DEN
19h 56m2 stops
$2,075American Airlines
Find Deal
Mon, 16 Jun - Tue, 8 Jul
American Airlines Logo
18:59 - 07:05DEN-SYD
20h 06m2 stops
American Airlines Logo
17:45 - 21:41SYD-DEN
19h 56m2 stops
$2,089American Airlines
Find Deal
Mon, 16 Jun - Tue, 8 Jul
United Airlines Logo
19:17 - 07:00DEN-SYD
19h 43m1 stop
United Airlines Logo
10:20 - 12:14SYD-DEN
17h 54m1 stop
$2,114United Airlines
Find Deal
Mon, 16 Jun - Wed, 2 Jul
United Airlines Logo
14:45 - 07:00DEN-SYD
24h 15m2 stops
United Airlines Logo
09:30 - 19:33SYD-DEN
26h 03m2 stops
$2,128United Airlines
Find Deal
Mon, 23 Jun - Mon, 30 Jun

KAYAK's insights & trends for Denver to Sydney flights

Get data-powered insights and trends into flights from Denver to Sydney to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Denver to Sydney?

The average price of all round-trip flights from Denver to Sydney clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Sydney on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Tuesday is the most expensive day to fly from Denver to Sydney. For your return ticket, we recommend flying on a Monday and avoiding Fridays for the best deals.

What is the cheapest month to fly from Denver to Sydney?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Denver to Sydney, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Denver to Sydney is April, where tickets cost $1,361 (return) on average. On the other hand, the most expensive months are December and July, where the average cost of round-trip tickets is $2,236 and $2,045 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Denver to Sydney, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from Denver to Sydney, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 21 weeks before departure.

Good to know

Low season

August

High season

March

Cheapest flight

$880
Best time to beat the crowds but there is an average 16% increase in price.
Most popular time to fly and prices are also 21% lower on average.
Flight from Denver to Sydney

When to book flights from Denver to Sydney

Are your dates flexible? Find out the best times to travel from Denver to Sydney based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated return price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or returns with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Denver to Sydney

  • Where can I freshen up after my flight to Sydney Airport?

    If you are heading straight to a meeting or just need to freshen up after the flight, you'll find public bathrooms and shower facilities at Sydney Airport (SYD). Head to the international terminal for shower facilities. You'll find them between Mcdonald's and Amcal on Level 2 in T1. Entrance to the showers is chargeable. There are toilets on all three levels of the airport, and the bathrooms usually close at 22:00 and open again at 06:00 each day.

  • What facilities does the airport offer for business travellers?

    As Sydney is regarded as the business hub of Australia, there are many travellers that head to Sydney on business. The airport provides support for these travellers by offering modern meeting and conference rooms at T1 International, fitted with audio-visual equipment for productive meetings. The Kingsford Smith Suite, on Level 3, can be set up for 150 people sitting or standing, so feel free to host presentations or corporate functions here.  

  • What is the cheapest flight from Denver to Sydney?

    In the last 3 days, the lowest price for a flight from Denver to Sydney was $563 for a one-way ticket and $1,094 for a return.

  • Which aircraft models fly most regularly from Denver to Sydney?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Denver to Sydney?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between Denver and Sydney, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Denver to Sydney, Qantas Airways or United Airlines?

    The two airlines most popular with KAYAK users for flights from Denver to Sydney are Qantas Airways and United Airlines. With an average price for the route of $2,091 and an overall rating of 7.5, Qantas Airways is the most popular choice. United Airlines is also a great choice for the route, with an average price of $2,545 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Denver to Sydney?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Denver to Sydney.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Denver to Sydney?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sydney from Denver is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Denver to Sydney?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to Sydney with an airline and back to Denver with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Denver to Sydney?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sydney from Denver up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from Denver to Sydney

  • If you are travelling with young children and need to nurse before getting on your flight to Sydney, you'll find three nursing rooms located just past security at the centre of each concourse. They are open 24 hours a day and have comfortable seating, a changing table, a sink, charging ports and are wheelchair accessible.
  • Denver Airport (DEN) is concerned about eco-travel and has implemented a service that lends to a healthy planet. Along with their robust recycling programs, they have installed water-bottle refill stations throughout the airport, in the hope that fewer plastic bottles will be bought and used only once.
  • A special feature of Denver Airport is the CATS therapy squad. This is a group of volunteers that walk around the airport with their friendly furry friends for about 2 hours at a time, letting passengers pet and interact with the animals. Interacting with a dog or cat is proving to decrease stress levels and increase mental well-being in what can be a stressful environment.

Top 3 airlines serving from Denver to Sydney

 
See real verified KAYAK customer reviews for airlines flying from Denver to Sydney. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Denver to Sydney? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Qantas AirwaysOverall score based on 826 reviews
7.2Entertainment
8.2Crew
6.9Food
7.4Comfort
7.7Boarding
Airline reviews

Loved the staff. The economy seats could have been bigger.

10.0 ExcellentCarolyn, Apr 2025LAX - SYD
Read more Qantas Airways reviews

Loved the staff. The economy seats could have been bigger.

Airport and crew experience was excellent. We had to queue for the runway - no one’s fault, but it did mean we were 30 minutes late leaving

Overall good experience with flight and airport wheelchair staff. Also got Indian food in the flights

I liked the service, the menu, and the comfort of the seats! Even tho we were seated by the bathrooms, the reclining seats and movie selection was very good, my husband and I didn’t mind at all

Very good as always, stand out airline. The passengers whom choose to stuff baggage that otherwise should be checked-in is a real bother but that's not the airlines doing. A real frustration that passengers just don't want to check-in luggage. This is a pet hate unfortunately.

It’s a two prop flight so I had problems with my ears on re- entering ! But otherwise fine

I love flying with Qantas. There was no onscreen entertaining on this flight, and only a snack provided (not a meal) but still better than Jetstar or Virgin (in my opinion) so still happy.

The food was terrible. And the flight attendants were very rude. One flight attendant wouldn’t help a passenger lift their carry-on. Another flight attendant wouldn’t give a man an extra blanket. And they walked by not even looking at the passengers to see if they needed a glass of water.

Wheelchair assistance to move through the terminals and to/from the plane door was excellent. No vegan snack on the flight, only something with salami and cheese in it.

I have flown Qantas multiple times in the past it seemed this flight the plane had less seat room or the seats were way less comfortable than before. Everything else was about the same. Thanks

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Electric plugs didn't work. Entertainment system wasn't working

The design of the light switch on the arm rest is ridiculous.

The gate attendant let me walk right by her with a bag too big for the overhead compartment

Smooth flight. As always dinner could have been more generous. Breakfast was great.

Overall, it was a good experience. Boarding was good and there was plenty of overhead bin space for everyone’s carryons (even when we boarded toward the end). Only improvement would be to offer trash service more regularly.

David went above and beyond to make our flight the best that it could be

No food service almost missed because of first flight delays

Had a hard time finding my assigned seat. No attendants to assist.

The negative was the wait at the airport coming back. I checked my bags in, an hour before boarding and I get the notification that my flight was delayed. Rather had gotten the notification while I was at the hotel. Then it was delayed 3 x’s. Ugh!

We missed our flight. The boarding pass had the wrong gate and by the time we received the text from Kayak, our flight was already gone. I’ll never use Kayak again and will go direct to the airlines in the future.

Boarding took forever, the plane was cramped and cold, and the seatbelt song came on constantly throughout the red eye flight with a loud pre-recorded message playing each time

Cabin felt crammed Snacks are lame But crew was super efficient getting us out on time despite delay

Took off on time and successfully avoided weather that looked to be a problem along the way

There were five broken seats on the plane. The crew was very rude in telling people they had to get off the plane and get a flight the next day. No call for volunteers, but telling people they had to get off. One woman was flying with her elderly mother and daughter and was told she had to leave or all three had to leave. Fortunately, a volunteer offered to stay. The situation was handled poorly.

The flight to Tokyo AA61 took off about two hours late, but then had to turn back. By that time the crew had to be replaced. Then they kept promising to take off in an hour, then in 3, then switch to the next day.

British Airways staff are very polite and willing to help.

Any sort of gluten free snack option would be nice

They lost my luggage and it didn’t get delivered until the next day.

Would have thought that they would gas up plane before everyone got on board

Everything you need to know for your flight from Denver to Sydney

Information on your arrival and departure airports

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