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$502+ Cheap flights from Denver (DEN) to Sydney (SYD)

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 2/3. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Sydney Kingsford Smith are usually found in April or May, booked 41 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap flight deals from Denver to Sydney

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 December 12, 2025.

This Air Canada deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:05 pmDEN - SYD
1 stop20h 30mAir Canada
Tue 1/137:15 pmSYD - DEN
2 stops35h 11mAir Canada
Deal found 12/9$1,443
This FlightHub deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:05 pmDEN - SYD
2 stops25h 35mMultiple Airlines
Tue 1/138:30 amSYD - DEN
2 stops21h 56mMultiple Airlines
Deal found 12/11$1,508
This Delta deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/301:10 pmDEN - SYD
1 stop23h 40mDelta
Tue 1/1310:40 amSYD - DEN
1 stop18h 55mDelta
Deal found 12/9$1,663
This United Airlines deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/283:41 pmDEN - SYD
1 stop21h 19mUnited Airlines
Mon 1/1211:20 amSYD - DEN
2 stops26h 52mUnited Airlines
Deal found 12/10$1,667
This Air Canada deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1211:44 amDEN - SYD
2 stops27h 51mAir Canada
Mon 12/1511:20 amSYD - DEN
2 stops24h 43mAir Canada
Deal found 12/10$1,668
This Delta deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/241:10 pmDEN - SYD
1 stop25h 20mDelta
Sun 1/1110:40 amSYD - DEN
1 stop30h 31mDelta
Deal found 12/11$1,671
This Air Canada deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:05 pmDEN - SYD
2 stops29h 00mAir Canada
Mon 1/127:15 pmSYD - DEN
2 stops35h 22mAir Canada
Deal found 12/11$1,688
This Delta deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:10 pmDEN - SYD
1 stop23h 40mDelta
Wed 1/1410:40 amSYD - DEN
1 stop25h 30mDelta
Deal found 12/10$1,713

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 December 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$906
(lol.travel)

One-way from

$502
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,604
Provider with most accurate pricing for Denver Intl-Sydney Kingsford Smith flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Sydney Kingsford Smith flights.
Search Deals
From Denver Intl to Sydney Kingsford Smith
Search Deals
One-way flight from Denver Intl to Sydney Kingsford Smith
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($294 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($48 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
Use the filters below to find and compare flights from Denver to Sydney that are best for you.

Fly from

Denver

Fly to

Sydney

Route

Depart

Return

Price

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Mon 2/9

7:05 pm-9:35 am

1 stop20h 30m

Sydney Kingsford Smith

Sat 2/28

11:20 am-12:37 pm

1 stop19h 17m

$997

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 1/31

7:05 pm-9:35 am

1 stop20h 30m

Sydney Kingsford Smith

Thu 2/12

11:20 am-12:28 pm

1 stop19h 08m

$1,039

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 2/7

7:05 pm-9:35 am

1 stop20h 30m

Sydney Kingsford Smith

Sat 2/14

11:20 am-6:05 pm

2 stops24h 45m

$1,039

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 2/14

11:19 am-9:35 am

2 stops28h 16m

Sydney Kingsford Smith

Tue 2/17

11:20 am-7:28 pm

1 stop26h 08m

$1,099

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 5/3

8:19 pm-7:05 am

1 stop18h 46m

Sydney Kingsford Smith

Sat 5/16

9:10 am-4:04 pm

1 stop22h 54m

$1,134

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Fri 3/13

8:04 pm-9:00 am

1 stop19h 56m

Sydney Kingsford Smith

Sat 3/21

11:20 am-12:19 pm

1 stop17h 59m

$1,146

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 2/18

1:27 pm-6:20 am

1 stop22h 53m

Sydney Kingsford Smith

Sun 3/1

11:20 am-12:28 pm

1 stop19h 08m

$1,163

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 2/15

3:54 pm-6:20 am

1 stop20h 26m

Sydney Kingsford Smith

Wed 3/4

11:50 am-2:32 pm

1 stop20h 42m

$1,163

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 2/11

7:41 pm-9:15 am

1 stop19h 34m

Sydney Kingsford Smith

Wed 2/25

11:50 am-10:10 pm

1 stop28h 20m

$1,163

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 2/15

7:43 pm-9:15 am

1 stop19h 32m

Sydney Kingsford Smith

Mon 3/2

11:20 am-12:28 pm

1 stop19h 08m

$1,163

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 19 results
1
2

Compare providers for flights from Denver to Sydney

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Denver to Sydney in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Denver-Sydney flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Denver-Sydney flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Denver-Sydney flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Sydney flights, Cheapflights users trust CheapOair the most. CheapOair has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Denver-Sydney flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

Use this chart to determine the optimal time to book a round-trip flight from Denver to Sydney. Price data was last updated on December 5, 2025.

The price you pay for your flight from Denver to Sydney may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Denver to Sydney?

Currently, June is the cheapest month in which you can book a flight from Denver to Sydney (average of $667). Flying from Denver to Sydney in January is currently the most expensive (average of $858). 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.

What is the cheapest time of day to fly from DEN to SYD?

Find hourly flight availability from Denver to Sydney. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Denver to Sydney at noon. If you’re flexible enough to do this you can expect to save up to 27% on your trip compared to booking a flight in the evening.

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

Use this chart to determine the cheapest time to fly round-trip from Denver to Sydney. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Denver to Sydney flight should consider departing on Saturday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 December 12, 2025.
Read through reviews of airlines operating flights from Denver to Sydney, such as Delta, Qantas Airways, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,005 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Qantas Airways
7.5
Good
947 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,095 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,049 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Air Canada
7.1
Good
10,515 reviews
Delta
7.9
Good
8,005 reviews

Comfort

7.9

Crew

8.5

Overall

7.9

Entertainment

7.9

Food

7.3

Boarding

8.1

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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?

    For as low as $997, Air Canada can have you in Sydney from Denver in 20h 30m. The distance between Denver and Sydney is about 8348 mi.

  • What are the cheapest airlines flying from Denver to Sydney round-trip?

    Currently priced at $745, Alaska Airlines will fly you from Denver to Sydney and back. In addition to Alaska Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Fiji Airways - these airlines can fly you to your destination from $786 and $791, respectively. These flights start at 30% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Denver to Sydney one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $331. However, be on the lookout for offers from Qantas Airways and American Airlines, as they are both options that can get you from Denver to Sydney for a low price.

  • Where are the most common layover locations when flying from Denver to Sydney?

    Most of the time, Denver to Sydney flights that have layovers will stop in Los Angeles.

  • What are some popular things to do or see while on a layover in Los Angeles?

    Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live are the most popular attractions in Los Angeles if you're in need of something to do during your layover. Hollywood Bowl, Hollywood Walk of Fame, and L.A. Live are located about 12.5 mi, 11.7 mi, and 10.8 mi, respectively from Los Angeles. Travelers in need of a car in Los Angeles can rent one for about $38 per day.

  • Where are the least popular layover locations for Denver to Sydney flights?

    Flights departing from Denver and landing in Sydney layover in Vancouver least frequently.

  • 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 vacation 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, June is the cheapest month in which you can book a flight from Denver to Sydney (average of $667). Flying from Denver to Sydney in January is currently the most expensive (average of $858). 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

Traveling to a place near Sydney?

Book flights to Sydney if you plan to visit one of these locations
Parramatta
Wollongong
Manly
Coogee

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Alternative routes for Denver to Sydney

See prices for flight routes from nearby airports that may be better suited for you.
Denver to Coolangatta flights
Colorado Springs to Sydney flights
Aspen to Sydney flights

Top 8 airlines flying from Denver to Sydney

Discover the top 8 airlines 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 2,558,603 searches. Data last updated December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$745Average$856FlexibilityNo cancel feeOn-time75%
DeltaCheapest$786Average$1,382FlexibilityNo cancel feeOn-timeN/A
Fiji AirwaysCheapest$791Average$1,356FlexibilityNo cancel feeOn-time74%
Qantas AirwaysCheapest$804Average$899FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$827Average$860FlexibilityNo cancel feeOn-time71%
Air New ZealandCheapest$834Average$1,266FlexibilityNo cancel feeOn-time78%
United AirlinesCheapest$853Average$1,460FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$980Average$1,269FlexibilityNo cancel feeOn-time67%

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