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$163+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
ago. 4 — ago. 111
lun. 8/4
lun. 8/11
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 julio 30, 2025.

Round-trip from

$275
(American Airlines)

One-way from

$163
(Delta)

Popular in

December

Cheapest in

January

Average price

$497
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. 6% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in July 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 julio 30, 2025.

This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/66:05 amSEA - SDF
1 stop10h 19mAmerican Airlines
sáb. 9/137:00 amSDF - SEA
1 stop13h 29mAmerican Airlines
Deal found 7/28$275
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/311:52 amSEA - SDF
1 stop9h 04mDelta
sáb. 9/66:00 pmSDF - SEA
1 stop8h 59mDelta
Deal found 7/28$325
This Southwest deal was found by Cheapflights users on 7/29. 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.
mar. 8/261:40 pmSEA - SDF
1 stop7h 45mSouthwest
mar. 9/23:50 pmSDF - SEA
2 stops10h 45mSouthwest
Deal found 7/29$330
This United Airlines deal was found by Cheapflights users on 7/30. 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.
mié. 9/38:45 amSEA - SDF
2 stops10h 39mUnited Airlines
mar. 9/163:35 pmSDF - SEA
1 stop8h 43mUnited Airlines
Deal found 7/30$420

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 julio 30, 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

sáb. 9/6

6:05 am-7:24 pm

1 stop10h 19m

Louisville Intl

sáb. 9/13

7:00 am-5:29 pm

1 stop13h 29m

$275

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

mié. 9/3

11:52 am-11:56 pm

1 stop9h 04m

Louisville Intl

mar. 9/9

6:00 am-12:25 pm

1 stop9h 25m

$325

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

mar. 8/26

1:40 pm-12:25 am

1 stop7h 45m

Louisville Intl

mar. 9/2

3:50 pm-11:35 pm

2 stops10h 45m

$330

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

mié. 9/3

7:10 am-8:28 pm

2 stops10h 18m

Louisville Intl

mar. 9/16

6:15 am-1:03 pm

1 stop9h 48m

$420

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

mié. 8/20

6:00 am-6:40 pm

1 stop9h 40m

$163

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

mar. 8/26

5:14 pm-10:02 am

2 stops13h 48m

$213

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

jue. 8/21

11:30 pm-11:44 am

1 stop9h 14m

$214

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

vie. 8/8

12:13 pm-10:07 am

2 stops18h 54m

$232

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

mié. 8/6

5:30 pm-3:36 pm

2 stops19h 06m

$277

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

sáb. 8/23

6:00 am-4:21 pm

1 stop7h 21m

$284

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 11 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 July 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 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 julio 30, 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’s the top layover airport for flights from Seattle to Louisville?

Share of 1-stop round-trip flights from Seattle to Louisville chosen by Cheapflights users in the past 12 months, using the same layover each way.

Dallas (DFW) – chosen by Cheapflights users on 80% of 1-stop itineraries from Seattle to Louisville on Cheapflights.

What’s the cheapest layover airport for flights from Seattle to Louisville?

Average round-trip fare for 1-stop flights from Seattle to Louisville, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of $597.

What’s the fastest layover option from Seattle to Louisville?

Shortest average travel time for 1-stop one-way flights from Seattle to Louisville, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Dallas (DFW) have the shortest average one-way travel time for 1-stop routes: 8h 16m.

Which airport typically offers the quickest layover for flights from Seattle to Louisville?

Average layover duration for 1-stop one-way flights from Seattle to Louisville, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Dallas (DFW) offer the fastest connection on this route, with an average layover time of 1h 58m.

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 julio 30, 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

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

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

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

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
4,241 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

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
7,980 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

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
8,896 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

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

Boarding

8.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Entertainment

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.

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

    Flying on American Airlines is currently your cheapest option to Louisville, with prices starting at $275. Additional round-trip tickets that might be worth considering are offered by Delta and Southwest, with the lowest prices starting at $325 and $330, respectively. These flights start at 44% 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 ($163), United Airlines ($213), and American Airlines ($214).

  • 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 julio 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$269Average$471FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$300Average$531FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$302Average$469FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$366Average$547FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$456Average$628FlexibilityNo cancel feeOn-time75%

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