HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sydney

$414+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — SYD
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Sydney with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Denver Intl to Sydney Kingsford Smith are usually found in April or May, booked 7 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

Cheap 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 June 12, 2025.

Round-trip from

$836
(Cheapflightsfares)

One-way from

$429
(Justfly.com)

Popular in

December

Cheapest in

April

Average price

$902
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. 13% potential increase in price ($174 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($29 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2025
Search Deals

Find 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 June 12, 2025.

This Justfly.com deal was found by Cheapflights users on 6/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/285:42 pmDEN - SYD
1 stop20h 43mQantas Airways
Mon 11/1011:15 amSYD - DEN
1 stop19h 09mQantas Airways
Deal found 6/11$835
This Delta deal was found by Cheapflights users on 6/11. 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.
Sun 10/266:30 amDEN - SYD
1 stop32h 05mDelta
Wed 11/1211:05 amSYD - DEN
1 stop18h 25mDelta
Deal found 6/11$861
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/2511:40 amDEN - SYD
1 stop27h 50mMultiple Airlines
Sun 9/74:20 pmSYD - DEN
2 stops35h 50mMultiple Airlines
Deal found 6/11$934
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/246:35 pmDEN - SYD
1 stop20h 20mAmerican Airlines
Thu 7/319:10 amSYD - DEN
2 stops22h 36mAmerican Airlines
Deal found 6/11$950
This FlightHub deal was found by Cheapflights users on 6/12. 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.
Sat 11/154:59 pmDEN - SYD
2 stops25h 31mFiji Airways
Sat 12/62:30 pmSYD - DEN
2 stops23h 25mFiji Airways
Deal found 6/12$1,140
This Air Canada deal was found by Cheapflights users on 6/10. 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.
Wed 11/1211:50 amDEN - SYD
1 stop27h 45mAir Canada
Wed 11/2611:20 amSYD - DEN
1 stop19h 17mAir Canada
Deal found 6/10$1,202
This oojo deal was found by Cheapflights users on 6/9. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/277:45 amDEN - SYD
2 stops33h 00mAir New Zealand
Mon 8/118:45 amSYD - DEN
2 stops26h 55mAir New Zealand
Deal found 6/9$1,207
This Alaska Airlines deal was found by Cheapflights users on 6/11. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/306:43 pmDEN - SYD
2 stops32h 02mAlaska Airlines
Tue 11/119:40 pmSYD - DEN
2 stops30h 51mAlaska Airlines
Deal found 6/11$1,355
This United Airlines deal was found by Cheapflights users on 6/10. 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.
Fri 12/121:26 pmDEN - SYD
1 stop22h 54mUnited Airlines
Tue 12/2312:10 pmSYD - DEN
1 stop25h 29mUnited Airlines
Deal found 6/10$1,485

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 June 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

Tue 10/28

5:42 pm-7:25 am

1 stop20h 43m

Sydney Kingsford Smith

Mon 11/10

11:15 am-12:24 pm

1 stop19h 09m

$835

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 10/26

6:30 am-7:35 am

1 stop32h 05m

Sydney Kingsford Smith

Wed 11/12

11:05 am-11:30 am

1 stop18h 25m

$861

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 6/25

11:40 am-7:30 am

1 stop27h 50m

Sydney Kingsford Smith

Sun 9/7

4:20 pm-12:10 pm

2 stops35h 50m

$934

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 7/24

6:35 pm-6:55 am

1 stop20h 20m

Sydney Kingsford Smith

Thu 7/31

9:10 am-3:46 pm

2 stops22h 36m

$950

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sat 11/15

4:59 pm-12:30 pm

2 stops25h 31m

Sydney Kingsford Smith

Sat 12/6

2:30 pm-7:55 pm

2 stops23h 25m

$1,140

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Wed 11/12

11:50 am-9:35 am

1 stop27h 45m

Sydney Kingsford Smith

Wed 11/26

11:20 am-12:37 pm

1 stop19h 17m

$1,202

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 7/27

7:45 am-8:45 am

2 stops33h 00m

Sydney Kingsford Smith

Mon 8/11

8:45 am-7:40 pm

2 stops26h 55m

$1,207

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 10/30

6:43 pm-7:45 pm

2 stops32h 02m

Sydney Kingsford Smith

Tue 11/11

9:40 pm-10:31 am

2 stops30h 51m

$1,355

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Sun 7/13

10:10 am-6:55 am

2 stops28h 45m

Sydney Kingsford Smith

Sat 7/26

10:20 am-4:25 pm

2 stops22h 05m

$1,565

DenverSydney

DEN - SYD

DENSYD

Denver Intl

Thu 10/30

8:20 pm-7:50 pm

2 stops54h 30m

Sydney Kingsford Smith

Wed 11/12

9:45 pm-5:35 pm

2 stops37h 50m

$1,677

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 21 results
1
2
3

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 June 9, 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 6 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, March is the cheapest month in which you can book a flight from Denver to Sydney (average of $1,041). Flying from Denver to Sydney in December is currently the most expensive (average of $1,635). 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 June 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 28% 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.

Rainfall in Sydney by month

Plan your trip to Sydney by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sydney ranges from 2.0 - 5.1 inches per month. March is typically the wettest month, when rainfall can reach 5.1 in. September is typically the driest time to visit Sydney when rainfall is around 2.0 in.

Temperature in Sydney by month

Plan your trip to Sydney by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sydney, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 71.6 F. Travelers looking to avoid the cold should look outside of July, when temperatures are typically at their lowest (around 51.8 F).

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 June 12, 2025.
See what other customers who have flown with Air Tahiti Nui, Fiji Airways and Singapore Airlines from Denver to Sydney have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Air Tahiti Nui
8.7
Very good
64 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Fiji Airways
8.1
Very good
194 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Singapore Airlines
8.1
Very good
1,302 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Alaska Airlines
8.0
Very good
10,000 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.
Delta
8.0
Very good
7,950 reviews
Air Tahiti Nui
8.7
Very good
64 reviews

Boarding

8.7

Comfort

8.1

Food

7.8

Overall

8.7

Entertainment

7.3

Crew

9.0

Reviews

1 / 2
10.0
Excellent

Isabelle,Apr 2023

AKL - PPT

Les sièges sont étroits, je mesure 1,77 m, les passants dans le couloirs notamment l'équipage n'arrêtaient pas de me cogner. nous étions en économie. l'équipage est au top. C'est le confort qui était négatif pour nous.

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.

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

    Currently priced at $836, Qantas Airways will fly you from Denver to Sydney and back. In addition to Qantas Airways, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and American Airlines - these airlines can fly you to your destination from $870 and $950, respectively. These flights start at 24% 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 Qantas Airways, with whom users have recently found tickets for as low as $429. However, be on the lookout for offers from Delta 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. Vancouver sees the second most layovers for non-direct flights flying from Denver to Sydney.

  • 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 $40 per day.

  • What are some popular points of interest to see during a layover in Vancouver?

    Pacific Central Station, Orpheum Theatre, and Capilano Suspension Bridge are the most popular attractions in Vancouver if you're in need of something to do during your layover. Pacific Central Station, Orpheum Theatre and Capilano Suspension Bridge are located about 6.6 mi, 6.5 mi, and 10.6 mi, respectively from Vancouver Intl if you are interested in checking them out. Those landing in Vancouver looking to spend some time exploring during their layover can rent a car for about $50 per day.

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

    Flights departing from Denver and landing in Sydney layover in San Francisco 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, March is the cheapest month in which you can book a flight from Denver to Sydney (average of $1,041). Flying from Denver to Sydney in December is currently the most expensive (average of $1,635). 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 Denver?

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Sydney

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

Top 7 airlines flying from Denver to Sydney

Discover the top 7 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$768Average$856FlexibilityNo cancel feeOn-time75%
Qantas AirwaysCheapest$810Average$914FlexibilityNo cancel feeOn-time74%
American AirlinesCheapest$829Average$865FlexibilityNo cancel feeOn-time71%
DeltaCheapest$830Average$1,286FlexibilityNo cancel feeOn-timeN/A
Air New ZealandCheapest$834Average$1,373FlexibilityNo cancel feeOn-time78%
Air CanadaCheapest$951Average$1,238FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$1,165Average$1,455FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.