£269 Cheap Flights from Louisville (SDF) to Seattle (SEA)

View £269 flight on Wed, 23 Sept 2026Opens in a new window

Popular airlines from Louisville International Airport (SDF) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Louisville (SDF) to Seattle (SEA)

Prices were available within the past 7 days and start at £269 for one-way flights and £550 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£550 Return, found 1 day ago
£550
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £550 found 1 day ago
Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£551 Return, found 1 day ago
£551
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £551 found 1 day ago
Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£555 Return, found 1 day ago
£555
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £555 found 1 day ago
Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£567 Return, found 18 hours ago
£567
Return
found 18 hours ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £567 found 18 hours ago
Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£574 Return, found 1 day ago
£574
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £574 found 1 day ago
Alaska Airlines
Sun, 5 Jul - Tue, 7 Jul
SDF
Louisville
SEA
Seattle
£575 Return, found 3 days ago
£575
Return
found 3 days ago
Select Alaska Airlines flight, departing Sun, 5 Jul from Louisville to Seattle, returning Tue, 7 Jul, priced at £575 found 3 days ago
Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£578 Return, found 1 day ago
£578
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £578 found 1 day ago
Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£590 Return, found 18 hours ago
£590
Return
found 18 hours ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £590 found 18 hours ago
Alaska Airlines
Wed, 1 Jul - Sun, 5 Jul
SDF
Louisville
SEA
Seattle
£596 Return, found 2 days ago
£596
Return
found 2 days ago
Select Alaska Airlines flight, departing Wed, 1 Jul from Louisville to Seattle, returning Sun, 5 Jul, priced at £596 found 2 days ago
Alaska Airlines
Fri, 26 Jun - Mon, 29 Jun
SDF
Louisville
SEA
Seattle
£597 Return, found 1 day ago
£597
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 26 Jun from Louisville to Seattle, returning Mon, 29 Jun, priced at £597 found 1 day ago

Frequently asked questions

How do I find cheap flights from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 70 connecting flights per day from Louisville, KY (SDF-Louisville Intl.) (SDF) to Seattle, WA (SEA-Seattle - Tacoma Intl.) (SEA). Some common connection points include O'Hare Intl. (ORD), Hartsfield-Jackson Atlanta Intl. (ATL), and Dallas-Fort Worth Intl. (DFW).
What is the earliest flight from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in March and April. An early departure like this can help you maximize your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) on a Friday, with around 51 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include American Airlines, United Airlines, and Delta Air Lines. Flight schedules are consistent throughout the week.
What are the most popular departure times for flights from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) are in the early morning, from 6am to 9am. About 32% of passengers prefer this time. Many major carriers, including American Airlines, Delta Air Lines and United Airlines, offer flights during this window. This timing works well because it allows you to get an early start on your travel day and arrive in Seattle with plenty of time.
How long does it take to fly from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
A flight from SDF to SEA with a layover takes around 9 hours 20 minutes, with the route covering approximately 1,940 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Select the "Business class" and "First class" filters when looking for SDF to SEA flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle from Louisville Intl. (SDF)?
From Louisville Intl. (SDF), you can fly into Seattle - Tacoma Intl. (SEA) to reach Seattle. Some flights may connect through major hubs like O'Hare Intl. (ORD), Midway Intl. (MDW), Denver Intl. (DEN) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Louisville, KY (SDF-Louisville Intl.) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Louisville Intl.
Destination airport
Seattle - Tacoma Intl.
Airlines serving
Alaska Airlines
Return price
£550
Distance
3102 km

Book with confidence

Compare flights from Louisville to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Louisville to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Louisville Intl. to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Louisville Intl. (SDF) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from Louisville to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Louisville Intl. to Seattle - Tacoma Intl. start at just £550 and range up to £597.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Louisville and Seattle
  • booking your flight during June, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Louisville to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Louisville Intl. to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Louisville to Seattle easily and book with confidence

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*Available to Expedia members.