$301 Cheap Flights from Seoul (GMP) to Sydney (SYD)

View $301 flight on Tue, May 20, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Seoul to Sydney (GMP-SYD)

Prices were available within the past 7 days and start at $301 for one-way flights and $643 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

All Nippon Airways
Tue, Aug 26 - Wed, Sep 3
GMP
Seoul
SYD
Sydney
$643 Roundtrip, found 10 hours ago
$643
Roundtrip
found 10 hours ago
Select All Nippon Airways flight, departing Tue, Aug 26 from Seoul to Sydney, returning Wed, Sep 3, priced at $643 found 10 hours ago
All Nippon Airways
Sun, May 11 - Sun, May 25
GMP
Seoul
SYD
Sydney
$643 Roundtrip, found 2 days ago
$643
Roundtrip
found 2 days ago
Select All Nippon Airways flight, departing Sun, May 11 from Seoul to Sydney, returning Sun, May 25, priced at $643 found 2 days ago
All Nippon Airways
Mon, Oct 27 - Mon, Nov 3
GMP
Seoul
SYD
Sydney
$644 Roundtrip, found 6 days ago
$644
Roundtrip
found 6 days ago
Select All Nippon Airways flight, departing Mon, Oct 27 from Seoul to Sydney, returning Mon, Nov 3, priced at $644 found 6 days ago
All Nippon Airways
Mon, Jun 16 - Sun, Jun 22
GMP
Seoul
SYD
Sydney
$645 Roundtrip, found 1 day ago
$645
Roundtrip
found 1 day ago
Select All Nippon Airways flight, departing Mon, Jun 16 from Seoul to Sydney, returning Sun, Jun 22, priced at $645 found 1 day ago
All Nippon Airways
Tue, Aug 26 - Wed, Sep 3
GMP
Seoul
SYD
Sydney
$678 Roundtrip, found 10 hours ago
$678
Roundtrip
found 10 hours ago
Select All Nippon Airways flight, departing Tue, Aug 26 from Seoul to Sydney, returning Wed, Sep 3, priced at $678 found 10 hours ago
All Nippon Airways
Fri, May 16 - Thu, May 22
GMP
Seoul
SYD
Sydney
$679 Roundtrip, found 6 days ago
$679
Roundtrip
found 6 days ago
Select All Nippon Airways flight, departing Fri, May 16 from Seoul to Sydney, returning Thu, May 22, priced at $679 found 6 days ago
Asiana Airlines
Mon, Jun 9 - Mon, Jun 23
GMP
Seoul
SYD
Sydney
$812 Roundtrip, found 4 days ago
$812
Roundtrip
found 4 days ago
Select Asiana Airlines flight, departing Mon, Jun 9 from Seoul to Sydney, returning Mon, Jun 23, priced at $812 found 4 days ago
China Southern Airlines
Thu, May 22 - Mon, May 26
GMP
Seoul
SYD
Sydney
$815 Roundtrip, found 4 days ago
$815
Roundtrip
found 4 days ago
Select China Southern Airlines flight, departing Thu, May 22 from Seoul to Sydney, returning Mon, May 26, priced at $815 found 4 days ago
Korean Air
Sat, Nov 22 - Tue, Nov 25
GMP
Seoul
SYD
Sydney
$879 Roundtrip, found 2 days ago
$879
Roundtrip
found 2 days ago
Select Korean Air flight, departing Sat, Nov 22 from Seoul to Sydney, returning Tue, Nov 25, priced at $879 found 2 days ago
China Eastern Airlines
Thu, May 22 - Mon, May 26
GMP
Seoul
SYD
Sydney
$885 Roundtrip, found 4 days ago
$885
Roundtrip
found 4 days ago
Select China Eastern Airlines flight, departing Thu, May 22 from Seoul to Sydney, returning Mon, May 26, priced at $885 found 4 days ago
Flights from Seoul (GMP) to Sydney (SYD)
Origin airport
Gimpo Intl.
Destination airport
Kingsford Smith Intl.
Airlines serving
Air China, All Nippon Airways, Japan Airlines
Roundtrip price
$642
Distance
5181 mi

Seoul to Sydney Flights

The cheapest times to fly from Seoul 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 Seoul to Sydney are during the month of August. You can find some of the cheapest flights from Seoul to Sydney with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Seoul to Sydney

Sunday is one of the best days to book for cheap flights from Seoul 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 Seoul 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 Seoul to Sydney in 2025. You can also book with separate airlines for your outbound and return journeys, from $301 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 Seoul 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 Seoul 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.

Frequently asked questions

How much does a flight from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD) cost?
Discover the latest flight deals from GMP to SYD by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from GMP to SYD?
The cheapest flights from GMP to SYD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD)?
You can’t catch a direct flight to Kingsford Smith Intl. Airport (SYD) from Seoul (GMP-Gimpo Intl.). However, you can easily travel to Sydney without any layovers by departing from Incheon Intl. Airport (ICN).
What is the cheapest airline that flies from GMP to SYD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from GMP to SYD. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD)?
You’ll have to hop on a flight with a layover when traveling from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD). Direct flights don’t operate daily on this route. However, simply filter your search to include one or more stops to find an option that works for you.
What day of the week has the most flights from GMP to SYD?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change depending on various factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD)?
Choose a flight from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD) that takes off before 3 PM to reduce the likelihood of delays. Later departures are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD) last-minute?
Booking your ticket from GMP to SYD just before your getaway is usually more expensive. However, if there’s some wiggle room with your departure times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a GMP to SYD flight and hotel package?
Opting for a GMP to SYD flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Pick from our extensive range of hotels and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Gimpo Intl. Airport (GMP) to Kingsford Smith Intl. Airport (SYD)?
If you booked your GMP to SYD flight in the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the type of ticket you purchased, 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 for further details.

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*Available to One Key members.