$590 Cheap Flights from Launceston (LST) to Seattle (SEA)

View $590 flight on Thu, Oct 16, 2025Opens in a new window

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

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Cheap Flights from Launceston to Seattle (LST-SEA)

Prices were available within the past 7 days and start at $590 for one-way flights and $1,111 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Qantas Airways
Mon, Oct 6 - Thu, Oct 23
LST
Launceston
SEA
Seattle
$1,111 Roundtrip, found 4 days ago
$1,111
Roundtrip
found 4 days ago
Select Qantas Airways flight, departing Mon, Oct 6 from Launceston to Seattle, returning Thu, Oct 23, priced at $1,111 found 4 days ago
Flights from Launceston (LST) to Seattle (SEA)
Origin airport
Launceston
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
$1,110
Distance
8258 mi

Launceston to Seattle Flights

The cheapest times to fly from Launceston to Seattle

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

 

The best time to book a flight from Launceston to Seattle

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

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 Launceston to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $590 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 Launceston to Seattle 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 Launceston to Seattle 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 Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA) cost?
Grab a cheap one-way flight from $590 or cheap return flight from $1,111 from Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA)?
October is the most affordable month to fly from LST to SEA. Planning your trip for the off-season is often the key to finding a great deal.
What is the cheapest airline that flies from Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA)?
To find the cheapest airline that'll fly you from LST to SEA, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA)?
Direct flights from Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from LST to SEA?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA)?
To avoid potential delays on the Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA) route, fly before 3 PM. Flights after this time have a 22% higher chance of cancellation.**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 Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Booking your ticket from LST to SEA shortly before your journey is typically more expensive. But if you're flexible with your departure dates and times, you could grab a cheap last-minute fare.
Is it cheaper to book a LST to SEA flight and hotel package?
Compared with arranging flights and hotels separately, booking a LST to SEA flight and hotel package with Expedia could lead to significant savings. What's more, having everything in one place takes the hassle out of travel planning. Just pick your flights and choose from our extensive range of hotels, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Launceston Airport (LST) to Seattle - Tacoma Intl. Airport (SEA)?
If you booked your LST to SEA flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the fare type you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you'd like more information.

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