A sunset over Sydney's skyline, including the Sydney Opera House and Harbour Bridge.

$724 Cheap Flights from Denver (DEN) to Sydney (SYD)

View $724 flight on Sun, Sep 6, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to Sydney Airport (SYD)

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Cheap Flights from Denver to Sydney (DEN-SYD)

Prices were available within the past 7 days and start at $724 for one-way flights and $1,222 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 10 - Wed, Nov 25
DEN
Denver
SYD
Sydney
$1,222 Roundtrip, found 16 hours ago
$1,222
Roundtrip
found 16 hours ago
Select United flight, departing Tue, Nov 10 from Denver to Sydney, returning Wed, Nov 25, priced at $1,222 found 16 hours ago
United
Tue, Nov 3 - Wed, Nov 18
DEN
Denver
SYD
Sydney
$1,242 Roundtrip, just found
$1,242
Roundtrip
just found
Select United flight, departing Tue, Nov 3 from Denver to Sydney, returning Wed, Nov 18, priced at $1,242 just found
Air New Zealand
Sat, Sep 19 - Sat, Oct 3
DEN
Denver
SYD
Sydney
$1,250 Roundtrip, found 2 days ago
$1,250
Roundtrip
found 2 days ago
Select Air New Zealand flight, departing Sat, Sep 19 from Denver to Sydney, returning Sat, Oct 3, priced at $1,250 found 2 days ago
United
Wed, Oct 28 - Mon, Nov 2
DEN
Denver
SYD
Sydney
$1,261 Roundtrip, found 2 hours ago
$1,261
Roundtrip
found 2 hours ago
Select United flight, departing Wed, Oct 28 from Denver to Sydney, returning Mon, Nov 2, priced at $1,261 found 2 hours ago
United
Wed, Jan 20 - Fri, Jan 29
DEN
Denver
SYD
Sydney
$1,272 Roundtrip, found 16 hours ago
$1,272
Roundtrip
found 16 hours ago
Select United flight, departing Wed, Jan 20 from Denver to Sydney, returning Fri, Jan 29, priced at $1,272 found 16 hours ago
Air New Zealand
Mon, Mar 1 - Mon, Mar 8
DEN
Denver
SYD
Sydney
$1,279 Roundtrip, found 20 hours ago
$1,279
Roundtrip
found 20 hours ago
Select Air New Zealand flight, departing Mon, Mar 1 from Denver to Sydney, returning Mon, Mar 8, priced at $1,279 found 20 hours ago
Alaska Airlines
Tue, Oct 6 - Tue, Oct 20
DEN
Denver
SYD
Sydney
$1,372 Roundtrip, found 20 hours ago
$1,372
Roundtrip
found 20 hours ago
Select Alaska Airlines flight, departing Tue, Oct 6 from Denver to Sydney, returning Tue, Oct 20, priced at $1,372 found 20 hours ago
Air Canada
Wed, Nov 4 - Wed, Nov 25
DEN
Denver
SYD
Sydney
$1,434 Roundtrip, just found
$1,434
Roundtrip
just found
Select Air Canada flight, departing Wed, Nov 4 from Denver to Sydney, returning Wed, Nov 25, priced at $1,434 just found
Delta
Tue, Nov 3 - Tue, Nov 24
DEN
Denver
SYD
Sydney
$1,509 Roundtrip, just found
$1,509
Roundtrip
just found
Select Delta flight, departing Tue, Nov 3 from Denver to Sydney, returning Tue, Nov 24, priced at $1,509 just found
All Nippon Airways
Wed, Nov 4 - Wed, Nov 25
DEN
Denver
SYD
Sydney
$1,523 Roundtrip, just found
$1,523
Roundtrip
just found
Select All Nippon Airways flight, departing Wed, Nov 4 from Denver to Sydney, returning Wed, Nov 25, priced at $1,523 just found

Alternative airports near Sydney

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Kingsford Smith Intl. SYD. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $1,559
SYD
Kingsford Smith Intl.
Cheapest
Average driving time to city center16 min
Flights from $1,559

Find the cheapest month to fly from Denver (DEN) to Sydney (SYD)

June is typically the cheapest month to fly

From $1,387 - $2,183 per traveler.

What you need to know for your flight from Denver Intl. to Kingsford Smith Intl.

Denver (DEN) to Sydney (SYD) at a glance

Explore a range of airlines that offer flights from Denver (DEN) to Sydney (SYD) on this long-haul international journey. Compare various options from full-service carriers to find the itinerary that aligns with your budget and schedule while you plan your adventure in Sydney, discovering its iconic landmarks and vibrant neighborhoods. Get all the essential information about booking one-way flights from Denver International Airport (DEN) to Kingsford Smith International Airport (SYD).

  • Fastest flight duration: around 18 hours in-flight, plus roughly 2 hours layover with one stop
  • Route distance: roughly 8,300 miles (13,360 km)
  • Flights per week: around 9 departures on average
  • Typical fares (one-way): economy tickets often range from $405–$1190, depending on seasonality and how far ahead you book

Flights from Denver International Airport (DEN) to Kingsford Smith International Airport (SYD)

According to recent traveler bookings, the most popular airlines flying from Denver to Sydney typically offer one-stop and multi-stop flights. Common layover locations include Los Angeles International Airport (LAX) with approximately a 2-hour stop, San Francisco International Airport (SFO) with around a 3-hour layover, and Vancouver International Airport (YVR) with a layover of about 1 hour and 30 minutes. This variety allows you to customize your trip based on price, total travel time, and cabin class to discover the best itinerary for your journey.

  • Qantas Airways: This full-service airline provides one-stop flights, with one-way ticket prices generally falling between $410 and $2070. It operates around 26% of the departures on this route, featuring an in-flight duration of 18 hours and a total travel time of approximately 20 hours and 15 minutes, including layover time.
  • American Airlines: Offering one-stop service, this full-service carrier has one-way fares that typically range from $415 to $650. It accounts for about 25% of the departures on this route, with an air time of 18 hours and a total journey duration of roughly 20 hours and 15 minutes, factoring in the layover.
  • United: As a full-service airline, United provides one-stop service with one-way fares usually between $675 and $1290. It represents around 22% of the flights on this route, with an in-flight time of 18 hours and an overall travel duration of approximately 20 hours and 15 minutes, including layover.
  • Delta: This full-service carrier offers one-stop service, with one-way fares typically ranging from $445 to $1515. Delta makes up about 10% of the departures on this route, featuring an in-flight time of 18 hours and a total journey time of around 20 hours and 15 minutes, including the layover.
  • Alaska Airlines: A full-service carrier providing one-stop flights, Alaska Airlines has one-way fares usually between $405 and $550. It accounts for approximately 7% of the departures on this route, with an in-flight time of 18 hours and a total travel time of roughly 20 hours and 15 minutes, including the layover.

Alternative routes from Denver (DEN) to Sydney (SYD)

  • Denver to Sydney (DEN-RSE): Located approximately 7 miles from Kingsford Smith International Airport (SYD), Rose Bay Seaplane Base Airport (RSE) provides scenic flight options.
  • Colorado Springs to Sydney (COS-SYD): Colorado Springs Airport (COS) lies about 73 miles from Denver International Airport (DEN), offering convenient travel connections.
  • Denver to Newcastle (DEN-NTL): Williamtown Airport (NTL) is roughly 87 miles away from Kingsford Smith International Airport (SYD), serving as a gateway to Newcastle.

How to find the best prices for flights from Denver (DEN) to Sydney (SYD)

Getting some of the best deals on flights from Denver to Sydney is all about timing and flexibility. Here are some key tips to help you save:

  1. Best times to book and fly: cheaper fares are often available when booking at least two months in advance, which aligns with when most travelers make their reservations. Afternoon departures between 12 PM and 6 PM usually offer lower prices, although evening flights from 6 PM to 12 AM are more popular. Additionally, flying on Monday typically results in cheaper fares, while Tuesday is the most traveled day.
  2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
  3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
  4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
  5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
  6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Kingsford Smith International Airport from Denver International Airport

Sydney welcomes travelers from Denver with a range of transport options based on price, convenience, and proximity. Here's how to reach Sydney efficiently:

  • Hotel transfer: Transfers offer a convenient way to reach your hotel in Sydney, with private rides that can be arranged in advance.
  • Car rental: Renting a car from Kingsford Smith International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Kingsford Smith International Airport on Expedia.
  • Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
  • Public transportation: From Kingsford Smith International Airport, International Airport Station, a metro station, is located about 0.1 miles from the airport and can be reached on foot, while Sydney Arncliffe Station, a train station, is approximately 1.2 miles away by car. For those heading to the waterfront, Sydney Seaport, a seaport, is situated about 6.7 miles from the airport by car.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) cost?
You can find cheap one-way flights from $724 and cheap return flights from $1,222 Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) with Expedia. One-way flights usually range from $789 to $6842, and return flights typically cost between $1254 and $9795. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The cheapest month to fly from DEN to SYD is November when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Enter DEN to SYD and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Japan Airlines is one of the cheapest airlines offering connecting flights from Denver Intl. (DEN) to Kingsford Smith Intl. (SYD), with round-trip tickets starting from around $2,099 with a layover in Dallas-Fort Worth Intl. (DFW). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The earliest flight from Denver International Airport (DEN) to Kingsford Smith International (SYD) typically departs at around 12:25 AM, operated by American Airlines and Qantas Airways. This seasonal service is available in March, allowing you to maximize your time in Sydney upon arrival. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
The most popular departure times for flights from Denver International (DEN) to Sydney (SYD) are in the late evening, from 6pm to 9pm. About 31% of passengers prefer this time, as it allows for a full day in Denver before heading off to Australia. Major airlines like United Airlines, American Airlines, and Air Canada operate flights during this window.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Flying from DEN to SYD with a connection usually takes about 19 hours 30 minutes, traveling roughly 8,354 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
Business class seats are offered on the DEN to SYD route. Airlines that offer business class service on this route include:

  • United Airlines
  • Turkish Airlines
  • American Airlines
  • Air Canada
  • British Airways
  • Lufthansa

First class is available with American Airlines and United Airlines.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Sydney from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly into Kingsford Smith Intl. (SYD) to reach Sydney. Some flights may connect through major hubs like Los Angeles Intl. (LAX), San Francisco Intl. (SFO), Vancouver Intl. (YVR) before reaching Sydney. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) Sydney Vacation Packages is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.)?
If you booked your Denver, CO (DEN-Denver Intl.) to Sydney, NSW (SYD-Kingsford Smith Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air Canada, Air New Zealand, Alaska Airlines, All Nippon Airways, American Airlines, Asiana Airlines, British Airways, Cathay Pacific, Delta, Japan Airlines, Korean Air, Qantas Airways, Singapore Airlines, Turkish Airlines, United
Roundtrip price
$1,222
Distance
8353 mi

Book with confidence

Denver to Sydney Flights

The cheapest times to fly from Denver to Sydney

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Denver to Sydney are during the month of November. You can find some of the cheapest flights from Denver to Sydney with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Denver to Sydney

Sunday is one of the best days to book for cheap flights from Denver to Sydney: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Denver to Sydney

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Denver to Sydney in 2026. You can also book with separate airlines for your outbound and return journeys, from $724 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Denver to Sydney flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Denver to Sydney airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Denver to Sydney Flights

*Flight schedules are subject to change.

*Available to One Key members.

 

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