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$128+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 60 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 June 12, 2025.

Round-trip from

$245
(Southwest)

One-way from

$128
(Southwest)

Popular in

December

Cheapest in

January

Average price

$582
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. 4% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This American Airlines deal was found by Cheapflights users on 6/11. 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 10/2111:55 pmSEA - SDF
1 stop11h 12mAmerican Airlines
Sat 11/15:56 amSDF - SEA
1 stop7h 49mAmerican Airlines
Deal found 6/11$233
This Southwest deal was found by Cheapflights users on 6/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/31:10 pmSEA - SDF
1 stop6h 30mSouthwest
Tue 9/165:30 amSDF - SEA
1 stop8h 45mSouthwest
Deal found 6/11$245
This FlightHub deal was found by Cheapflights users on 6/11. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/174:58 pmSEA - SDF
1 stop18h 40mSpirit Airlines
Mon 9/225:55 pmSDF - SEA
1 stop24h 58mSpirit Airlines
Deal found 6/11$253
This Delta deal was found by Cheapflights users on 6/12. 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 10/2111:05 pmSEA - SDF
1 stop7h 49mDelta
Sat 11/16:36 amSDF - SEA
1 stop9h 24mDelta
Deal found 6/12$258
This Sun Country Air deal was found by Cheapflights users on 6/11. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/1711:57 pmSEA - SDF
1 stop10h 09mSun Country Air
Mon 7/2111:52 amSDF - SEA
1 stop13h 55mSun Country Air
Deal found 6/11$315
This United Airlines deal was found by Cheapflights users on 6/12. 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 9/311:54 pmSEA - SDF
1 stop7h 08mUnited Airlines
Tue 9/167:00 amSDF - SEA
2 stops11h 51mUnited Airlines
Deal found 6/12$340
This Mytrip deal was found by Cheapflights users on 6/10. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/2611:59 pmSEA - SDF
1 stop6h 14mMultiple Airlines
Mon 6/304:17 pmSDF - SEA
2 stops25h 46mMultiple Airlines
Deal found 6/10$348
This Alaska Airlines deal was found by Cheapflights users on 6/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/16:00 amSEA - SDF
1 stop9h 11mAlaska Airlines
Mon 7/146:34 amSDF - SEA
1 stop9h 00mAlaska Airlines
Deal found 6/10$472

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 June 12, 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 10/21

11:55 pm-2:07 pm

1 stop11h 12m

Louisville Intl

Sat 11/1

5:56 am-10:45 am

1 stop7h 49m

$233

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 9/3

1:10 pm-10:40 pm

1 stop6h 30m

Louisville Intl

Tue 9/16

5:30 am-11:15 am

1 stop8h 45m

$245

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 9/17

4:58 pm-2:38 pm

1 stop18h 40m

Louisville Intl

Mon 9/22

5:55 pm-3:53 pm

1 stop24h 58m

$253

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Tue 10/21

11:05 pm-9:54 am

1 stop7h 49m

Louisville Intl

Sat 11/1

6:36 am-1:00 pm

1 stop9h 24m

$258

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 7/17

11:57 pm-1:06 pm

1 stop10h 09m

Louisville Intl

Mon 7/21

11:52 am-10:47 pm

1 stop13h 55m

$315

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Wed 9/3

7:10 am-10:24 pm

2 stops12h 14m

Louisville Intl

Tue 9/16

9:40 am-5:31 pm

1 stop10h 51m

$340

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Thu 6/26

11:59 pm-9:13 am

1 stop6h 14m

Louisville Intl

Mon 6/30

4:17 pm-3:03 pm

2 stops25h 46m

$348

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Tue 7/1

6:00 am-6:11 pm

1 stop9h 11m

Louisville Intl

Mon 7/14

6:34 am-12:34 pm

1 stop9h 00m

$472

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Mon 8/4

10:55 pm-12:25 pm

1 stop10h 30m

$128

SeattleLouisville

SEA - SDF

SEASDF

Seattle/Tacoma Intl

Tue 7/1

3:58 pm-11:38 pm

2 stops28h 40m

$140

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 16 results
1
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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 June 9, 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 June 12, 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 June 12, 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
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
7,950 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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
10,000 reviews

Boarding

8.1

Food

7.1

Crew

8.5

Comfort

7.8

Overall

8.0

Entertainment

7.1

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 Southwest is currently your cheapest option to Louisville, with prices starting at $245. Additional round-trip tickets that might be worth considering are offered by Spirit Airlines and American Airlines, with the lowest prices starting at $253 and $257, respectively. These flights start at 51% 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 Southwest ($128), Spirit Airlines ($140), and United Airlines ($168).

  • 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
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$247Average$382FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$301Average$467FlexibilityNo cancel feeOn-time71%
DeltaCheapest$306Average$478FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$366Average$581FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$405Average$532FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$469Average$628FlexibilityNo cancel feeOn-time75%

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