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$138+ 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 5/21. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Louisville Intl are usually found in January or October, booked 48 days in advance, depart on a Saturday or Wednesday and return on a Tuesday

Cheap 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 May 1, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$275
(Delta)

One-way from

$138
(American Airlines)

Popular in

December

Cheapest in

January

Average price

$523
Provider with most accurate pricing for Seattle/Tacoma Intl-Louisville Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Louisville Intl flights.
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From Seattle/Tacoma Intl to Louisville Intl
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One-way flight from Seattle/Tacoma Intl to Louisville Intl
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Highest demand for flights based on searches. 5% potential increase in price ($27 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find 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 May 1, 2025.

This Delta deal was found by Cheapflights users on 4/30. 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.
Tue 6/36:00 amSEA - SDF
1 stop8h 10mDelta
Tue 6/103:24 pmSDF - SEA
1 stop10h 41mDelta
Deal found 4/30$275
This American Airlines deal was found by Cheapflights users on 4/30. 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 6/21:10 amSEA - SDF
1 stop8h 53mAmerican Airlines
Tue 6/107:00 amSDF - SEA
1 stop8h 38mAmerican Airlines
Deal found 4/30$276
This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/243:20 pmSEA - SDF
2 stops15h 58mSpirit Airlines
Tue 5/2712:58 pmSDF - SEA
3 stops38h 12mSpirit Airlines
Deal found 4/30$283
This United Airlines deal was found by Cheapflights users on 4/30. 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 5/2411:50 pmSEA - SDF
1 stop6h 43mUnited Airlines
Tue 5/277:00 amSDF - SEA
1 stop7h 32mUnited Airlines
Deal found 4/30$291
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/811:59 pmSEA - SDF
1 stop8h 32mMultiple Airlines
Wed 6/113:51 pmSDF - SEA
2 stops26h 12mMultiple Airlines
Deal found 4/29$306
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3111:59 pmSEA - SDF
1 stop13h 50mSun Country Air
Mon 8/46:45 pmSDF - SEA
1 stop7h 05mSun Country Air
Deal found 4/29$309
This Southwest deal was found by Cheapflights users on 4/29. 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 9/105:35 amSEA - SDF
1 stop9h 50mSouthwest
Sun 9/147:00 amSDF - SEA
1 stop6h 40mSouthwest
Deal found 4/29$385
This Alaska Airlines deal was found by Cheapflights users on 4/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2712:25 amSEA - SDF
1 stop8h 42mAlaska Airlines
Sat 8/212:38 pmSDF - SEA
1 stop7h 56mAlaska Airlines
Deal found 4/28$522

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 May 1, 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

Tue 6/3

6:00 am-5:10 pm

1 stop8h 10m

Louisville Intl

Tue 6/10

3:24 pm-11:05 pm

1 stop10h 41m

$275

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Mon 6/2

1:10 am-1:03 pm

1 stop8h 53m

Louisville Intl

Tue 6/10

7:00 am-12:38 pm

1 stop8h 38m

$276

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sat 5/24

3:20 pm-10:18 am

2 stops15h 58m

Louisville Intl

Tue 5/27

12:58 pm-12:10 am

3 stops38h 12m

$283

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sat 5/24

11:50 pm-9:33 am

1 stop6h 43m

Louisville Intl

Tue 5/27

7:00 am-11:32 am

1 stop7h 32m

$291

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sun 6/8

11:59 pm-11:31 am

1 stop8h 32m

Louisville Intl

Wed 6/11

3:51 pm-3:03 pm

2 stops26h 12m

$306

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 7/31

11:59 pm-4:49 pm

1 stop13h 50m

Louisville Intl

Mon 8/4

6:45 pm-10:50 pm

1 stop7h 05m

$309

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 9/10

5:35 am-6:25 pm

1 stop9h 50m

Louisville Intl

Sun 9/14

7:00 am-10:40 am

1 stop6h 40m

$385

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Sun 7/27

12:25 am-12:07 pm

1 stop8h 42m

Louisville Intl

Sat 8/2

12:38 pm-5:34 pm

1 stop7h 56m

$522

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 5/21

6:20 am-4:47 pm

1 stop7h 27m

$138

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 6/5

11:59 pm-10:33 am

1 stop7h 34m

$158

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 15 results
1
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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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
FareScanPrice Accuracy-Trust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy2 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 Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Seattle-Louisville flight deals on Cheapflights vs. Mytrip >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 Mytrip the most. Mytrip 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 April 25, 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 48 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 $299). Flying from Seattle to Louisville in April is currently the most expensive (average of $369). 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 May 1, 2025.

It’s optimal to fly from Seattle to Louisville in the afternoon. By choosing this option you can save up to 46% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Seattle to Louisville?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Louisville. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Louisville flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Louisville by month

Plan your trip to Louisville by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Louisville ranges from 3.1 - 5.3 inches per month. May is typically the wettest month, when rainfall can reach 5.3 in. September is typically the driest time to visit Louisville when rainfall is around 3.1 in.

Temperature in Louisville by month

Plan your trip to Louisville by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Louisville, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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 May 1, 2025.
To help decide which airline to fly from Seattle to Louisville, see what other customers have to say about Alaska Airlines, Southwest and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,972 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
9,972 reviews

Boarding

8.1

Food

7.1

Overall

8.0

Comfort

7.9

Entertainment

7.1

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

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.

  • 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 $275. Additional round-trip tickets that might be worth considering are offered by American Airlines and Spirit Airlines, with the lowest prices starting at $276 and $283, respectively. These flights start at 46% 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 American Airlines ($138), Sun Country Air ($158), and United Airlines ($188).

  • 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 $299). Flying from Seattle to Louisville in April is currently the most expensive (average of $369). 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
Jeffersonville
Corydon
Elizabethtown
Bardstown

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Top 6 airlines flying from Seattle to Louisville

Discover the top 6 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$247Average$311FlexibilityNo cancel feeOn-time65%
DeltaCheapest$306Average$508FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$306Average$473FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$368Average$594FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$405Average$531FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$469Average$627FlexibilityNo cancel feeOn-time75%

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