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$180+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
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 March 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1210:42 am
SEA
-
SDF
1 stop29h 44m
Multiple Airlines
Sat 5/169:21 am
SDF
-
SEA
1 stop11h 21m
Multiple Airlines
Deal found 3/8$301
This American Airlines deal was found by Cheapflights users on 3/5. 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 4/147:00 am
SEA
-
SDF
1 stop11h 30m
American Airlines
Tue 4/216:00 am
SDF
-
SEA
1 stop11h 27m
American Airlines
Deal found 3/5$303
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1910:42 am
SEA
-
SDF
1 stop29h 44m
Multiple Airlines
Wed 5/279:21 am
SDF
-
SEA
1 stop30h 40m
Multiple Airlines
Deal found 3/8$362
This Southwest deal was found by Cheapflights users on 3/8. 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 5/196:00 am
SEA
-
SDF
1 stop6h 05m
Southwest
Tue 5/196:40 pm
SDF
-
SEA
1 stop6h 50m
Southwest
Deal found 3/8$379
This American Airlines deal was found by Cheapflights users on 3/5. 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 4/227:00 am
SEA
-
SDF
1 stop11h 30m
American Airlines
Sun 4/266:00 am
SDF
-
SEA
1 stop7h 14m
American Airlines
Deal found 3/5$380
This United Airlines deal was found by Cheapflights users on 3/10. 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 4/157:37 pm
SEA
-
SDF
2 stops10h 33m
United Airlines
Sat 4/189:00 am
SDF
-
SEA
1 stop7h 17m
United Airlines
Deal found 3/10$384
This Southwest deal was found by Cheapflights users on 3/7. 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.
Sat 4/185:45 am
SEA
-
SDF
2 stops12h 05m
Southwest
Sat 4/254:50 pm
SDF
-
SEA
1 stop6h 45m
Southwest
Deal found 3/7$390
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/221:00 pm
SEA
-
SDF
1 stop27h 26m
Multiple Airlines
Wed 5/279:21 am
SDF
-
SEA
1 stop30h 40m
Multiple Airlines
Deal found 3/8$391
This Southwest deal was found by Cheapflights users on 3/6. 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.
Fri 5/15:30 am
SEA
-
SDF
1 stop7h 35m
Southwest
Tue 5/57:15 pm
SDF
-
SEA
1 stop7h 55m
Southwest
Deal found 3/6$397
This American Airlines deal was found by Cheapflights users on 3/9. 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.
Mon 4/611:59 pm
SEA
-
SDF
1 stop7h 16m
American Airlines
Thu 4/96:00 am
SDF
-
SEA
1 stop7h 14m
American Airlines
Deal found 3/9$398

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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$301
(Kiwi.com)

One-way from

$180
(American Airlines)

Popular in

April

Cheapest in

January

Average price

$517
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. 7% potential increase in price ($39 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 March 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 March 10, 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

Wed 4/22

11:59 pm-9:10 am

1 stop6h 11m

Louisville Intl

Wed 4/29

3:36 pm-9:06 pm

1 stop8h 30m

$379

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 5/7

5:15 am-3:00 pm

1 stop6h 45m

Louisville Intl

Thu 5/7

5:25 pm-11:30 pm

2 stops9h 05m

$413

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 4/22

6:50 am-8:35 pm

2 stops10h 45m

Louisville Intl

Wed 4/29

3:30 pm-10:30 pm

2 stops10h 00m

$428
Quickest round-trip

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Fri 5/29

11:55 pm-10:05 am

1 stop7h 10m

Louisville Intl

Sun 5/31

8:20 pm-12:10 am

1 stop6h 50m

$437

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 5/21

11:55 pm-9:55 am

1 stop7h 00m

Louisville Intl

Sat 6/6

7:10 pm-11:30 pm

1 stop7h 20m

$437

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sat 5/2

8:16 am-7:24 pm

1 stop8h 08m

Louisville Intl

Wed 5/6

5:38 pm-11:15 pm

1 stop8h 37m

$469

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Mon 7/27

11:53 pm-12:03 pm

1 stop9h 10m

Louisville Intl

Fri 7/31

7:25 pm-11:26 pm

1 stop7h 01m

$478

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sat 7/18

11:05 pm-10:15 am

1 stop8h 10m

Louisville Intl

Fri 7/24

3:35 pm-7:45 pm

1 stop7h 10m

$519

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 5/21

9:00 pm-9:55 am

2 stops9h 55m

Louisville Intl

Sun 5/24

7:00 pm-10:40 pm

1 stop6h 40m

$522

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 5/21

6:30 am-9:00 pm

2 stops11h 30m

Louisville Intl

Sun 6/7

2:30 pm-9:25 pm

2 stops9h 55m

$527

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy2 starsTrust Score*2 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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Louisville. Price data was last updated on March 6, 2026.

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 44 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, March is the cheapest month in which you can book a flight from Seattle to Louisville (average of $100). 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.

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 March 10, 2026.
See what other customers who have flown with Alaska Airlines,Southwest, 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.
Alaska Airlines
8.0
Very good
12,014 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
12,014 reviews
Alaska Airlines
8.0
Very good
12,014 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Southwest
8.0
Very good
4,317 reviews
Alaska Airlines
8.0
Very good
12,014 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,276 reviews
Alaska Airlines
8.0
Very good
12,014 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,409 reviews
Alaska Airlines
8.0
Very good
12,014 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.1
Good
11,414 reviews
Alaska Airlines
8.0
Very good
12,014 reviews

Entertainment

7.0

Food

7.1

Overall

8.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 $379, United Airlines can have you in Louisville from Seattle in 6h 11m. 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 American Airlines, with the lowest prices starting at $283 and $294, 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 ($149), American Airlines ($153), 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, March is the cheapest month in which you can book a flight from Seattle to Louisville (average of $100). 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

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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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$244Average$543FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$283Average$440FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$294Average$468FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$300Average$457FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$456Average$661FlexibilityNo cancel feeOn-time75%

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