$475 Cheap Flights from Seattle (SEA) to Launceston (LST)

View $475 flight on Thu, Oct 23, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Launceston, TAS (LST)

Cheap Flights from Seattle to Launceston (SEA-LST)

Prices were available within the past 7 days and start at $475 for one-way flights and $1,003 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Qantas Airways
Wed, Sep 10 - Wed, Sep 24
SEA
Seattle
LST
Launceston
$1,003 Roundtrip, found 16 hours ago
$1,003
Roundtrip
found 16 hours ago
Select Qantas Airways flight, departing Wed, Sep 10 from Seattle to Launceston, returning Wed, Sep 24, priced at $1,003 found 16 hours ago
American Airlines
Tue, Oct 7 - Thu, Oct 23
SEA
Seattle
LST
Launceston
$1,009 Roundtrip, found 1 day ago
$1,009
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Oct 7 from Seattle to Launceston, returning Thu, Oct 23, priced at $1,009 found 1 day ago
Qantas Airways
Wed, Sep 10 - Wed, Sep 24
SEA
Seattle
LST
Launceston
$1,011 Roundtrip, found 16 hours ago
$1,011
Roundtrip
found 16 hours ago
Select Qantas Airways flight, departing Wed, Sep 10 from Seattle to Launceston, returning Wed, Sep 24, priced at $1,011 found 16 hours ago
Qantas Airways
Wed, Sep 10 - Wed, Sep 24
SEA
Seattle
LST
Launceston
$1,016 Roundtrip, found 16 hours ago
$1,016
Roundtrip
found 16 hours ago
Select Qantas Airways flight, departing Wed, Sep 10 from Seattle to Launceston, returning Wed, Sep 24, priced at $1,016 found 16 hours ago
American Airlines
Tue, Oct 7 - Thu, Oct 23
SEA
Seattle
LST
Launceston
$1,022 Roundtrip, found 1 day ago
$1,022
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Oct 7 from Seattle to Launceston, returning Thu, Oct 23, priced at $1,022 found 1 day ago
Alaska Airlines
Mon, Oct 6 - Thu, Oct 23
SEA
Seattle
LST
Launceston
$1,024 Roundtrip, found 1 day ago
$1,024
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Oct 6 from Seattle to Launceston, returning Thu, Oct 23, priced at $1,024 found 1 day ago
Alaska Airlines
Mon, Oct 6 - Thu, Oct 23
SEA
Seattle
LST
Launceston
$1,025 Roundtrip, found 1 day ago
$1,025
Roundtrip
found 1 day ago
Select Alaska Airlines flight, departing Mon, Oct 6 from Seattle to Launceston, returning Thu, Oct 23, priced at $1,025 found 1 day ago
Alaska Airlines
Wed, Nov 19 - Wed, Dec 17
SEA
Seattle
LST
Launceston
$1,026 Roundtrip, found 6 hours ago
$1,026
Roundtrip
found 6 hours ago
Select Alaska Airlines flight, departing Wed, Nov 19 from Seattle to Launceston, returning Wed, Dec 17, priced at $1,026 found 6 hours ago
United
Wed, Nov 19 - Wed, Dec 17
SEA
Seattle
LST
Launceston
$1,107 Roundtrip, found 6 hours ago
$1,107
Roundtrip
found 6 hours ago
Select United flight, departing Wed, Nov 19 from Seattle to Launceston, returning Wed, Dec 17, priced at $1,107 found 6 hours ago
Qatar Airways
Tue, Nov 18 - Fri, Dec 19
SEA
Seattle
LST
Launceston
$2,463 Roundtrip, found 4 hours ago
$2,463
Roundtrip
found 4 hours ago
Select Qatar Airways flight, departing Tue, Nov 18 from Seattle to Launceston, returning Fri, Dec 19, priced at $2,463 found 4 hours ago
Flights from Seattle (SEA) to Launceston (LST)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Launceston
Airlines serving
Qantas Airways, Qatar Airways, Singapore Airlines, United
Roundtrip price
$1,003
Distance
8258 mi

Seattle to Launceston Flights

The cheapest times to fly from Seattle to Launceston

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 Seattle to Launceston are during the month of September. You can find some of the cheapest flights from Seattle to Launceston with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Launceston

Sunday is one of the best days to book for cheap flights from Seattle to Launceston: 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 Seattle to Launceston

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 Seattle to Launceston in 2025. You can also book with separate airlines for your outbound and return journeys, from $475 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 Seattle to Launceston 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 Seattle to Launceston 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 Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST) cost?
Secure a cheap one-way flight from $475 or cheap return flight from $1,003 from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST)?
September is the most affordable month to fly from SEA to LST. Traveling outside of peak seasons is often the key to finding a great deal.
What is the cheapest airline that flies from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest SEA to LST flight.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST)?
You'll have to hop on a flight with a layover when traveling from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST). There are no daily direct flights on this route. However, just filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from SEA to LST?
You'll generally find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST)?
Opt for a flight from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST) 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 Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST) last-minute?
Last-minute fares from SEA to LST are typically more expensive. For the cheapest rates, start looking for flights as early as possible. That being said, if your travel plans are flexible, you may find a cheap fare right before your trip.
Is it cheaper to book a SEA to LST flight and hotel package?
You'll generally save money by securing a SEA to LST flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. After selecting your ideal flights and accommodations, consider adding extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Launceston Airport (LST)?
You can usually reschedule or cancel your SEA to LST flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.