$262 Cheap Flights from Lancaster (LNS) to Seattle (SEA)

View $262 flight on Mon, Sep 15, 2025Opens in a new window

Popular airlines from Lancaster, PA (LNS) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Lancaster to Seattle (LNS-SEA)

Prices were available within the past 7 days and start at $262 for one-way flights and $435 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southern Airways Express
Wed, Sep 10 - Wed, Sep 17
LNS
Lancaster
SEA
Seattle
$435 Roundtrip, found 3 days ago
$435
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Wed, Sep 10 from Lancaster to Seattle, returning Wed, Sep 17, priced at $435 found 3 days ago
Southern Airways Express
Tue, Sep 2 - Tue, Sep 16
LNS
Lancaster
SEA
Seattle
$444 Roundtrip, found 3 days ago
$444
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Tue, Sep 2 from Lancaster to Seattle, returning Tue, Sep 16, priced at $444 found 3 days ago
Southern Airways Express
Wed, Sep 10 - Wed, Sep 17
LNS
Lancaster
SEA
Seattle
$444 Roundtrip, found 3 days ago
$444
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Wed, Sep 10 from Lancaster to Seattle, returning Wed, Sep 17, priced at $444 found 3 days ago
Southern Airways Express
Wed, Sep 10 - Wed, Sep 17
LNS
Lancaster
SEA
Seattle
$445 Roundtrip, found 3 days ago
$445
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Wed, Sep 10 from Lancaster to Seattle, returning Wed, Sep 17, priced at $445 found 3 days ago
Southern Airways Express
Tue, Sep 9 - Thu, Sep 11
LNS
Lancaster
SEA
Seattle
$446 Roundtrip, found 3 days ago
$446
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Tue, Sep 9 from Lancaster to Seattle, returning Thu, Sep 11, priced at $446 found 3 days ago
Southern Airways Express
Wed, Sep 10 - Wed, Sep 17
LNS
Lancaster
SEA
Seattle
$449 Roundtrip, found 3 days ago
$449
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Wed, Sep 10 from Lancaster to Seattle, returning Wed, Sep 17, priced at $449 found 3 days ago
Southern Airways Express
Tue, Sep 9 - Thu, Sep 11
LNS
Lancaster
SEA
Seattle
$449 Roundtrip, found 3 days ago
$449
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Tue, Sep 9 from Lancaster to Seattle, returning Thu, Sep 11, priced at $449 found 3 days ago
Southern Airways Express
Sat, Aug 30 - Tue, Sep 16
LNS
Lancaster
SEA
Seattle
$454 Roundtrip, found 3 days ago
$454
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Sat, Aug 30 from Lancaster to Seattle, returning Tue, Sep 16, priced at $454 found 3 days ago
Southern Airways Express
Wed, Sep 10 - Wed, Sep 17
LNS
Lancaster
SEA
Seattle
$454 Roundtrip, found 3 days ago
$454
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Wed, Sep 10 from Lancaster to Seattle, returning Wed, Sep 17, priced at $454 found 3 days ago
Southern Airways Express
Wed, Sep 10 - Wed, Sep 17
LNS
Lancaster
SEA
Seattle
$459 Roundtrip, found 3 days ago
$459
Roundtrip
found 3 days ago
Select Southern Airways Express flight, departing Wed, Sep 10 from Lancaster to Seattle, returning Wed, Sep 17, priced at $459 found 3 days ago

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $519
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $519
Flights from Lancaster (LNS) to Seattle (SEA)
Origin airport
Lancaster
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
$435
Distance
2314 mi

Lancaster to Seattle Flights

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

 

The best time to book a flight from Lancaster to Seattle

Sunday is one of the best days to book for cheap flights from Lancaster 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 Lancaster 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 Lancaster to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from $262 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 Lancaster 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 Lancaster 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 Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA) cost?
Lock in a cheap one-way flight from $262 or cheap return flight from $435 from Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA) 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 Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA)?
September is the cheapest month to fly from LNS to SEA. Timing your trip outside of the busy season is often the key to scoring lower fares.
What is the cheapest airline that flies from Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA)?
Expedia's filter tool lets you easily compare airlines, flight times and baggage options all in one place. Select your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest LNS to SEA flight.
How many flights per day from Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA)?
You'll have to take a flight with a layover if you're traveling from Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from LNS to SEA?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can change depending on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA)?
Opt for a flight from Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA) that takes off before 3 PM to reduce the likelihood of delays and cancellations. Departures after this hour have a 22% higher chance of being canceled, on average.**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 Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA) last-minute?
Waiting until just before your departure to book your flight from LNS to SEA often results in higher prices. While you may find some last-minute deals, they're not always guaranteed. Be flexible with your itinerary for the best chance of getting a bargain.
Is it cheaper to book a LNS to SEA flight and hotel package?
You'll typically save money by booking a LNS to SEA flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your ideal flights and accommodations, you can add extras like tours, car rentals and activities.
Can I cancel or change the date of my flight from Lancaster Airport (LNS) to Seattle - Tacoma Intl. Airport (SEA)?
You can usually cancel or reschedule your LNS to SEA flight. However, for bookings made more than 24 hours ago, additional fees 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 more details on our Customer Service portal.

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*Available to One Key members.