$368 Cheap Flights from Lancaster (LNS) to Seattle (SEA)

View $368 flight on Tue, Aug 19, 2025Opens in a new window

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

Cheap Flights from Lancaster to Seattle (LNS-SEA)

Prices were available within the past 7 days and start at $368 for one-way flights and $417 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southern Airways Express
Sat, Sep 27 - Tue, Oct 14
LNS
Lancaster
SEA
Seattle
$417 Roundtrip, found 5 days ago
$417
Roundtrip
found 5 days ago
Select Southern Airways Express flight, departing Sat, Sep 27 from Lancaster to Seattle, returning Tue, Oct 14, priced at $417 found 5 days ago
Southern Airways Express
Sat, Sep 13 - Tue, Sep 23
LNS
Lancaster
SEA
Seattle
$437 Roundtrip, found 4 days ago
$437
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Sat, Sep 13 from Lancaster to Seattle, returning Tue, Sep 23, priced at $437 found 4 days ago
Southern Airways Express
Tue, Sep 16 - Tue, Sep 23
LNS
Lancaster
SEA
Seattle
$444 Roundtrip, found 4 days ago
$444
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Tue, Sep 16 from Lancaster to Seattle, returning Tue, Sep 23, priced at $444 found 4 days ago
Southern Airways Express
Tue, Sep 16 - Mon, Oct 6
LNS
Lancaster
SEA
Seattle
$448 Roundtrip, found 4 days ago
$448
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Tue, Sep 16 from Lancaster to Seattle, returning Mon, Oct 6, priced at $448 found 4 days ago
Southern Airways Express
Sat, Sep 13 - Wed, Sep 24
LNS
Lancaster
SEA
Seattle
$454 Roundtrip, found 4 days ago
$454
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Sat, Sep 13 from Lancaster to Seattle, returning Wed, Sep 24, priced at $454 found 4 days ago
Southern Airways Express
Mon, Sep 15 - Tue, Sep 23
LNS
Lancaster
SEA
Seattle
$456 Roundtrip, found 4 days ago
$456
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Mon, Sep 15 from Lancaster to Seattle, returning Tue, Sep 23, priced at $456 found 4 days ago
Southern Airways Express
Sat, Sep 13 - Tue, Sep 16
LNS
Lancaster
SEA
Seattle
$458 Roundtrip, found 5 days ago
$458
Roundtrip
found 5 days ago
Select Southern Airways Express flight, departing Sat, Sep 13 from Lancaster to Seattle, returning Tue, Sep 16, priced at $458 found 5 days ago
Southern Airways Express
Thu, Sep 18 - Tue, Sep 23
LNS
Lancaster
SEA
Seattle
$464 Roundtrip, found 4 days ago
$464
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Thu, Sep 18 from Lancaster to Seattle, returning Tue, Sep 23, priced at $464 found 4 days ago
Southern Airways Express
Sat, Sep 27 - Fri, Oct 17
LNS
Lancaster
SEA
Seattle
$468 Roundtrip, found 5 days ago
$468
Roundtrip
found 5 days ago
Select Southern Airways Express flight, departing Sat, Sep 27 from Lancaster to Seattle, returning Fri, Oct 17, priced at $468 found 5 days ago
Southern Airways Express
Tue, Sep 16 - Thu, Sep 25
LNS
Lancaster
SEA
Seattle
$474 Roundtrip, found 4 days ago
$474
Roundtrip
found 4 days ago
Select Southern Airways Express flight, departing Tue, Sep 16 from Lancaster to Seattle, returning Thu, Sep 25, priced at $474 found 4 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 $504
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $504
Flights from Lancaster (LNS) to Seattle (SEA)
Origin airport
Lancaster
Destination airport
Seattle - Tacoma Intl.
Roundtrip price
$417
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 $368 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?
Discover the latest flight deals from LNS to SEA 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 LNS to SEA?
The cheapest flights from LNS to SEA are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from LNS to SEA?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from LNS to SEA. Sort your results by "Price (lowest to highest)" to snap up a great deal.
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.