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$119+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 81 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 September 11, 2025.

Round-trip from

$238
(Delta)

One-way from

$119
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$439
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 ($31 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 September 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 September 11, 2025.

This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/96:00 amSEA - SDF
1 stop8h 20mDelta
Sat 12/136:35 amSDF - SEA
1 stop9h 23mDelta
Deal found 9/9$238
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/711:15 pmSEA - SDF
1 stop7h 35mDelta
Tue 10/146:05 pmSDF - SEA
1 stop6h 58mDelta
Deal found 9/9$243
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:40 amSEA - SDF
1 stop8h 09mDelta
Sat 12/136:35 amSDF - SEA
1 stop9h 23mDelta
Deal found 9/9$260
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1111:55 pmSEA - SDF
1 stop9h 02mDelta
Mon 12/1512:37 pmSDF - SEA
1 stop7h 23mDelta
Deal found 9/9$265
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/1711:55 pmSEA - SDF
1 stop9h 01mDelta
Tue 10/215:58 pmSDF - SEA
1 stop8h 56mDelta
Deal found 9/10$269
This Southwest deal was found by Cheapflights users on 9/9. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/175:15 amSEA - SDF
1 stop9h 55mSouthwest
Wed 11/191:50 pmSDF - SEA
2 stops12h 05mSouthwest
Deal found 9/9$270
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Tue 10/712:34 amSEA - SDF
1 stop10h 09mAmerican Airlines
Mon 10/135:02 pmSDF - SEA
1 stop8h 54mAmerican Airlines
Deal found 9/11$279
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/91:39 pmSEA - SDF
1 stop6h 29mDelta
Sun 12/146:35 amSDF - SEA
1 stop7h 19mDelta
Deal found 9/9$284
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:40 amSEA - SDF
1 stop9h 25mDelta
Mon 12/1512:37 pmSDF - SEA
1 stop7h 23mDelta
Deal found 9/9$287
This American Airlines deal was found by Cheapflights users on 9/11. 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.
Mon 11/2412:59 amSEA - SDF
1 stop8h 14mAmerican Airlines
Tue 12/26:04 amSDF - SEA
1 stop10h 50mAmerican Airlines
Deal found 9/11$288
This Delta deal was found by Cheapflights users on 9/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/811:10 pmSEA - SDF
1 stop7h 49mDelta
Fri 12/126:35 amSDF - SEA
1 stop9h 23mDelta
Deal found 9/9$291

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 September 11, 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 12/10

6:00 am-5:17 pm

1 stop8h 17m

Louisville Intl

Sat 12/13

6:35 am-12:58 pm

1 stop9h 23m

$238

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Tue 12/9

6:00 am-5:20 pm

1 stop8h 20m

Louisville Intl

Sat 12/13

6:35 am-12:58 pm

1 stop9h 23m

$238

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 12/10

2:03 pm-12:05 am

1 stop7h 02m

Louisville Intl

Tue 12/16

6:16 pm-11:58 pm

1 stop8h 42m

$243

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 12/11

11:55 pm-11:57 am

1 stop9h 02m

Louisville Intl

Sat 12/13

6:35 am-12:58 pm

1 stop9h 23m

$260

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Mon 11/17

5:15 am-6:10 pm

1 stop9h 55m

Louisville Intl

Wed 11/19

5:50 pm-10:55 pm

1 stop8h 05m

$265

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Mon 12/8

11:40 am-12:05 am

1 stop9h 25m

Louisville Intl

Tue 12/16

6:00 pm-10:15 pm

1 stop7h 15m

$265

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Tue 12/9

11:55 pm-11:57 am

1 stop9h 02m

Louisville Intl

Mon 12/15

6:00 pm-10:15 pm

1 stop7h 15m

$265

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 12/10

2:03 pm-12:05 am

1 stop7h 02m

Louisville Intl

Fri 12/12

6:35 am-12:58 pm

1 stop9h 23m

$269

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Tue 12/9

6:00 am-5:20 pm

1 stop8h 20m

Louisville Intl

Fri 12/12

6:35 am-12:58 pm

1 stop9h 23m

$269

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Fri 10/17

11:55 pm-11:56 am

1 stop9h 01m

Louisville Intl

Tue 10/21

5:58 pm-11:54 pm

1 stop8h 56m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 22 results
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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 August 29, 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, 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 September 11, 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.

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 September 11, 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
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Southwest
8.0
Very good
4,248 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,960 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,937 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Overall

8.0

Food

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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 $238, Delta can have you in Louisville from Seattle in 8h 17m. The distance from Seattle to Louisville is about 1939 mi.

  • 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 $269. Additional round-trip tickets that might be worth considering are offered by American Airlines and Southwest, with the lowest prices starting at $298 and $300, respectively. These flights start at 45% 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 ($122), Delta ($122), and American Airlines ($122).

  • 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 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$269Average$477FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$298Average$475FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$300Average$521FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$336Average$502FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$469Average$628FlexibilityNo cancel feeOn-time75%

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