HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$1,248+ Cheap flights from Williamsport to Seattle (IPT - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
IPT — SEA
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Williamsport to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Williamsport to Seattle

Cheapest flights from Williamsport to Seattle
Explore the most affordable flight options available from Williamsport to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Expedia deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:55 amIPT - SEA
3 stops19h 23mMultiple Airlines
Sun 1/410:14 pmSEA - IPT
1 stop13h 01mMultiple Airlines
Deal found 12/16$1,248

Find flight deals from Williamsport to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Williamsport (IPT) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$1,248
(Expedia)
Provider with most accurate pricing for Williamsport Lycoming County-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Williamsport Lycoming County-Seattle/Tacoma Intl flights.
Search Deals
From Williamsport Lycoming County to Seattle/Tacoma Intl
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Williamsport to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Williamsport to Seattle that are best for you.

Fly from

Williamsport

Fly to

Seattle

Route

Depart

Return

Price

WilliamsportSeattle

IPT - SEA

IPTSEA

Williamsport Lycoming County

Wed 12/31

5:55 am-10:18 pm

3 stops19h 23m

Seattle/Tacoma Intl

Sun 1/4

10:14 pm-2:15 pm

1 stop13h 01m

$1,248

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Compare providers for flights from Williamsport to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Williamsport to Seattle in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Williamsport-Seattle flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Williamsport-Seattle flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Williamsport-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Williamsport-Seattle flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Williamsport-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Williamsport to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Williamsport with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Williamsport to Seattle

What is the cheapest month to book a flight from Williamsport to Seattle?

Currently, November is the cheapest month in which you can book a flight from Williamsport to Seattle (average of $258). Flying from Williamsport to Seattle in July is currently the most expensive (average of $331). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Williamsport to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • Can I find deals for flights from Williamsport to Seattle that include hotel bookings?

    Yes. In addition to deals on Williamsport to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Williamsport to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Williamsport to Seattle.

  • Can I find deals for business class flights from Williamsport to Seattle?

    Yes. Cheapflights offers flight deals from Williamsport to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Williamsport to Seattle?

    Currently, November is the cheapest month in which you can book a flight from Williamsport to Seattle (average of $258). Flying from Williamsport to Seattle in July is currently the most expensive (average of $331). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Williamsport to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Seattle flights
Newark to Seattle flights
Dulles Intl to Seattle flights
Reagan-National to Seattle flights
LaGuardia to Seattle flights
John F Kennedy Intl to Portland flights
Philadelphia to Seattle flights
Dulles Intl to Portland flights
Newark to Portland flights
Reagan-National to Portland flights
LaGuardia to Portland flights
Pittsburgh to Seattle flights
Philadelphia to Portland flights
Pittsburgh to Portland flights
John F Kennedy Intl to Spokane flights
Harrisburg to Seattle flights
Newark to Spokane flights
LaGuardia to Spokane flights
Dulles Intl to Spokane flights
Allentown to Seattle flights
Reagan-National to Spokane flights
Harrisburg to Portland flights
Pittsburgh to Spokane flights
State College to Seattle flights
Philadelphia to Pasco flights
Philadelphia to Spokane flights
Scranton to Seattle flights
John F Kennedy Intl to Bellingham flights
John F Kennedy Intl to Pasco flights
Newark to Pasco flights
Allentown to Spokane flights
Harrisburg to Spokane flights
State College to Portland flights
Allentown to Portland flights
Dulles Intl to Pasco flights
Newark to Bellingham flights
LaGuardia to Pasco flights
Philadelphia to Bellingham flights
Philadelphia to Pullman flights
Reagan-National to Pasco flights
Reagan-National to Bellingham flights
Dulles Intl to Bellingham flights
LaGuardia to Bellingham flights
John F Kennedy Intl to Wenatchee flights
Elmira to Portland flights
Reagan-National to Yakima flights
Scranton to Portland flights
State College to Spokane flights
Elmira to Seattle flights
Dulles Intl to Wenatchee flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.