HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Louisville

$147+ Cheap flights from Seattle to Louisville (SEA - SDF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Louisville 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.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Louisville Intl are usually found in August or September, booked 60 days in advance, depart on a Saturday or Wednesday and return on a Tuesday

Cheap flight deals from Seattle to Louisville

Cheapest flights from Seattle to Louisville
Explore the most affordable flight options available from Seattle to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:02 amSEA - SDF
1 stop6h 20mUnited Airlines
Wed 12/248:00 amSDF - SEA
1 stop8h 58mUnited Airlines
Deal found 12/11$684
This American Airlines deal was found by Cheapflights users on 12/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/215:23 amSEA - SDF
1 stop9h 08mAmerican Airlines
Thu 1/15:00 amSDF - SEA
1 stop10h 37mAmerican Airlines
Deal found 12/11$703
This Southwest deal was found by Cheapflights users on 12/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:00 amSEA - SDF
1 stop11h 35mSouthwest
Wed 12/311:50 pmSDF - SEA
2 stops12h 05mSouthwest
Deal found 12/10$708
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/295:02 amSEA - SDF
1 stop6h 20mUnited Airlines
Wed 12/319:55 amSDF - SEA
1 stop28h 32mUnited Airlines
Deal found 12/10$712
This American Airlines deal was found by Cheapflights users on 12/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:23 amSEA - SDF
1 stop9h 05mAmerican Airlines
Mon 12/295:49 pmSDF - SEA
1 stop8h 24mAmerican Airlines
Deal found 12/9$723
This American Airlines deal was found by Cheapflights users on 12/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1711:39 pmSEA - SDF
1 stop7h 29mAmerican Airlines
Thu 1/16:35 amSDF - SEA
1 stop9h 25mAmerican Airlines
Deal found 12/10$797
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/177:00 amSEA - SDF
2 stops10h 28mUnited Airlines
Thu 1/12:00 pmSDF - SEA
1 stop7h 46mUnited Airlines
Deal found 12/10$813
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/2012:30 pmSEA - SDF
1 stop6h 54mUnited Airlines
Sat 1/35:40 amSDF - SEA
1 stop9h 23mUnited Airlines
Deal found 12/10$832

Find flight deals from Seattle to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Louisville (SDF). 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 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$310
(American Airlines)

One-way from

$147
(American Airlines)

Popular in

December

Cheapest in

August

Average price

$556
Provider with most accurate pricing for Seattle/Tacoma Intl-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Louisville Intl flights.
Search Deals
From Seattle/Tacoma Intl to Louisville Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to Louisville Intl
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Louisville 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 12, 2025.
Use the filters below to find and compare flights from Seattle to Louisville that are best for you.

Fly from

Seattle

Fly to

Louisville

Route

Depart

Return

Price

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 2/4

8:04 am-11:19 pm

1 stop12h 15m

Louisville Intl

Sat 2/7

1:15 pm-7:04 pm

1 stop8h 49m

$310

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sat 1/24

8:10 am-7:43 pm

1 stop8h 33m

Louisville Intl

Wed 1/28

6:00 am-12:49 pm

1 stop9h 49m

$329

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sun 1/25

8:35 am-8:47 pm

1 stop9h 12m

Louisville Intl

Wed 1/28

6:00 am-11:45 am

1 stop8h 45m

$329

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sun 1/25

12:25 pm-10:24 pm

1 stop6h 59m

Louisville Intl

Wed 1/28

5:35 am-11:32 am

1 stop8h 57m

$329

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Fri 2/6

8:35 am-6:40 pm

1 stop7h 05m

Louisville Intl

Mon 2/9

6:25 am-10:50 am

1 stop7h 25m

$337

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 1/29

11:10 pm-10:01 am

1 stop7h 51m

Louisville Intl

Sun 2/1

7:50 am-2:21 pm

1 stop9h 31m

$337

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 1/8

9:55 am-9:10 pm

1 stop8h 15m

Louisville Intl

Sat 1/10

6:30 am-11:00 am

1 stop7h 30m

$337

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Fri 2/6

8:40 am-10:30 pm

2 stops10h 50m

Louisville Intl

Mon 2/9

6:12 pm-10:43 pm

1 stop7h 31m

$342

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sat 1/24

7:00 am-10:05 pm

2 stops12h 05m

Louisville Intl

Wed 1/28

2:30 pm-10:30 pm

2 stops11h 00m

$350

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Tue 2/17

7:15 am-9:23 pm

1 stop11h 08m

$147

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 20 results
1
2

Compare providers for flights from Seattle to Louisville

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 Seattle to Louisville in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice 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 Seattle-Louisville flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Louisville flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Seattle-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Louisville 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 Seattle-Louisville 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 Seattle to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Seattle 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 Seattle to Louisville

How far ahead should I book a flight from Seattle to Louisville?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Louisville. Price data was last updated on December 5, 2025.

The price you pay for your flight from Seattle to Louisville may vary depending on when you book. For the best chance of a lower fare, look to book 60 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Louisville (average of $118). Flying from Seattle to Louisville in July is currently the most expensive (average of $298). 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.

What is the cheapest time of day to fly from SEA to SDF?

Find hourly flight availability from Seattle to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

It’s optimal to fly from Seattle to Louisville in the afternoon. By choosing this option you can save up to 45% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Louisville. Reviews last updated December 12, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from Seattle to Louisville have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Alaska Airlines
8.0
Very good
11,432 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Southwest
7.9
Good
4,253 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
Delta
7.9
Good
8,008 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
United Airlines
7.4
Good
9,095 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.
American Airlines
7.2
Good
11,050 reviews
Alaska Airlines
8.0
Very good
11,432 reviews

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

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

  • How long is the flight from Seattle to Louisville?

    For as low as $329, American Airlines can have you in Louisville from Seattle in 8h 33m. The distance from Seattle to Louisville is about 1939 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Louisville round-trip?

    Flying on Delta is currently your cheapest option to Louisville, with prices starting at $244. Additional round-trip tickets that might be worth considering are offered by United Airlines and Southwest, with the lowest prices starting at $293 and $300, respectively. These flights start at 49% lower than the current average price 3 months from now.

  • What are the cheapest airlines to fly from Seattle to Louisville one-way?

    The cheapest airlines for a one-way flight from Seattle to Louisville are Delta ($128), United Airlines ($149), and American Airlines ($153).

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Louisville 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 Seattle to Louisville?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Louisville (average of $118). Flying from Seattle to Louisville in July is currently the most expensive (average of $298). 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 Louisville?

Book flights to Louisville if you plan to visit one of these locations
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

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 Seattle to Louisville

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Nashville flights
Portland to Nashville flights
Seattle to Cincinnati flights
Portland to Cincinnati flights
Spokane to Nashville flights
Seattle to Knoxville flights
Portland to Louisville flights
Portland to Knoxville flights
Pasco to Nashville flights
Seattle to Blountville flights
Seattle to Lexington flights
Spokane to Louisville flights
Spokane to Knoxville flights
Portland to Lexington flights
Spokane to Cincinnati flights
Seattle to Evansville flights
Spokane to Lexington flights
Bellingham to Nashville flights
Pasco to Cincinnati flights
Pasco to Louisville flights
Pasco to Knoxville flights
Pasco to Lexington flights
Seattle to Paducah flights
Spokane to Blountville flights
Bellingham to Cincinnati flights
Pullman to Nashville flights
Walla Walla to Cincinnati flights
Portland to Blountville flights
Yakima to Cincinnati flights
Wenatchee to Nashville flights
Walla Walla to Louisville flights
Seattle to Huntington flights
Pullman to Cincinnati flights
Seattle to Owensboro flights
Portland to Paducah flights
Portland to Huntington flights
Portland to Evansville flights
Spokane to Evansville flights
Yakima to Louisville flights

Top 5 airlines flying from Seattle to Louisville

Discover the top 5 airlines that operate flights from Seattle to Louisville. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$244Average$487FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$293Average$456FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$300Average$509FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$301Average$473FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$456Average$628FlexibilityNo cancel feeOn-time75%

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.