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$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 5/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
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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 April 24, 2026.

This American Airlines deal was found by Cheapflights users on 4/22. 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 5/277:10 am
SEA
-
SDF
1 stop9h 25m
American Airlines
Wed 6/37:45 pm
SDF
-
SEA
1 stop8h 14m
American Airlines
Deal found 4/22$293
This American Airlines deal was found by Cheapflights users on 4/20. 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.
Tue 5/196:00 am
SEA
-
SDF
1 stop7h 47m
American Airlines
Tue 5/266:56 pm
SDF
-
SEA
1 stop8h 20m
American Airlines
Deal found 4/20$311
This American Airlines deal was found by Cheapflights users on 4/21. 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.
Tue 9/15:10 am
SEA
-
SDF
1 stop9h 49m
American Airlines
Thu 9/103:54 pm
SDF
-
SEA
1 stop10h 02m
American Airlines
Deal found 4/21$324
This Southwest deal was found by Cheapflights users on 4/20. 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.
Wed 9/2311:05 pm
SEA
-
SDF
1 stop8h 20m
Southwest
Mon 9/287:10 pm
SDF
-
SEA
1 stop7h 20m
Southwest
Deal found 4/20$325
This Southwest deal was found by Cheapflights users on 4/21. 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.
Tue 9/111:05 pm
SEA
-
SDF
2 stops10h 05m
Southwest
Thu 9/1011:05 am
SDF
-
SEA
1 stop9h 00m
Southwest
Deal found 4/21$330
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:30 pm
SEA
-
SDF
1 stop7h 29m
Delta
Wed 5/207:49 pm
SDF
-
SEA
1 stop6h 55m
Delta
Deal found 4/20$340
This American Airlines deal was found by Cheapflights users on 4/22. 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 9/2410:17 am
SEA
-
SDF
1 stop9h 49m
American Airlines
Tue 9/293:54 pm
SDF
-
SEA
1 stop10h 02m
American Airlines
Deal found 4/22$342
This Delta deal was found by Cheapflights users on 4/23. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:53 pm
SEA
-
SDF
1 stop9h 10m
Delta
Mon 8/317:25 pm
SDF
-
SEA
1 stop7h 01m
Delta
Deal found 4/23$355
This Delta deal was found by Cheapflights users on 4/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:30 pm
SEA
-
SDF
1 stop7h 29m
Delta
Sat 5/235:52 pm
SDF
-
SEA
1 stop7h 56m
Delta
Deal found 4/20$371
This Southwest deal was found by Cheapflights users on 4/22. 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.
Wed 8/125:20 am
SEA
-
SDF
1 stop6h 55m
Southwest
Sun 8/166:25 pm
SDF
-
SEA
1 stop8h 10m
Southwest
Deal found 4/22$376
This Southwest deal was found by Cheapflights users on 4/22. 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.
Wed 5/276:00 am
SEA
-
SDF
1 stop6h 05m
Southwest
Wed 6/34:40 pm
SDF
-
SEA
2 stops10h 30m
Southwest
Deal found 4/22$381
This United Airlines deal was found by Cheapflights users on 4/23. 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 6/511:52 pm
SEA
-
SDF
1 stop6h 10m
United Airlines
Mon 6/85:20 am
SDF
-
SEA
1 stop7h 20m
United Airlines
Deal found 4/23$385

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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$293
(American Airlines)

One-way from

$147
(American Airlines)

Popular in

April

Cheapest in

January

Average price

$591
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. 10% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
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 April 24, 2026.
Use the filters below to find and compare flights from Seattle to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 5/14

11:59 pm-11:59 am

1 stop9h 00m

Louisville Intl

Mon 5/18

7:49 pm-11:44 pm

1 stop6h 55m

$399

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 6/4

10:40 pm-9:02 am

1 stop7h 22m

Louisville Intl

Sun 6/7

5:20 am-9:40 am

1 stop7h 20m

$406

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 6/4

5:30 am-2:55 pm

1 stop6h 25m

Louisville Intl

Sat 6/13

7:10 pm-11:30 pm

1 stop7h 20m

$406
Quickest round-trip

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Mon 6/1

11:52 pm-9:02 am

1 stop6h 10m

Louisville Intl

Wed 6/3

5:20 am-9:40 am

1 stop7h 20m

$424

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 9/17

11:05 pm-10:25 am

1 stop8h 20m

Louisville Intl

Sun 9/20

5:40 am-1:40 pm

2 stops11h 00m

$429

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 9/23

8:10 am-10:22 pm

2 stops11h 12m

Louisville Intl

Mon 9/28

5:35 am-10:00 am

1 stop7h 25m

$429

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 8/13

9:10 am-11:05 pm

2 stops10h 55m

Louisville Intl

Sun 8/16

11:35 am-8:10 pm

2 stops11h 35m

$447

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 9/10

11:53 pm-12:03 pm

1 stop9h 10m

Louisville Intl

Mon 9/14

2:15 pm-8:29 pm

1 stop9h 14m

$457

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Fri 7/31

6:25 am-7:30 pm

1 stop10h 05m

Louisville Intl

Mon 8/3

10:45 am-6:30 pm

1 stop10h 45m

$457

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 7/29

11:05 pm-10:05 am

1 stop8h 00m

Louisville Intl

Sat 8/1

5:05 pm-12:10 am

2 stops10h 05m

$462

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

Showing 1-10 of 18 resultsSorted by cheapest first
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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Louisville flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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?

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 43 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, January is the cheapest month in which you can book a flight from Seattle to Louisville (average of $338). Flying from Seattle to Louisville in April is currently the most expensive (average of $591). 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.

How much does it cost to fly round-trip from Seattle to Louisville?

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 April 24, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, andDelta 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.
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,334 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Alaska Airlines
7.9
Good
12,280 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,450 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,643 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,666 reviews
Southwest
8.0
Very good
4,334 reviews

Boarding

8.1

Crew

8.6

Overall

8.0

Comfort

8.0

Entertainment

7.5

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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 $406, Delta can have you in Louisville from Seattle in 6h 25m. 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 $242. Additional round-trip tickets that might be worth considering are offered by United Airlines and American Airlines, with the lowest prices starting at $283 and $285, respectively. These flights start at 47% 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 United Airlines ($129), American Airlines ($140), and Southwest ($162).

  • 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, January is the cheapest month in which you can book a flight from Seattle to Louisville (average of $338). Flying from Seattle to Louisville in April is currently the most expensive (average of $591). 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
Elizabethtown
Corydon
Jeffersonville
Bardstown

Browse thousands of different options on Cheapflights for your next trip

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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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$242Average$549FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$283Average$434FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$285Average$481FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$300Average$436FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$491Average$661FlexibilityNo cancel feeOn-time75%

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