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$153+ Cheap flights from Louisville to Seattle (SDF - SEA)

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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to Seattle/Tacoma Intl are usually found in October or January, booked 69 days in advance, depart on a Tuesday or Friday and return on a Saturday

Cheap flight deals from Louisville to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Seattle (SEA). 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 16, 2025.

Round-trip from

$291
(American Airlines)

One-way from

$153
(American Airlines)

Popular in

July

Cheapest in

October

Average price

$429
From Louisville Intl to Seattle/Tacoma Intl
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One-way flight from Louisville Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 12% potential increase in price ($64 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 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 Louisville to Seattle

Cheapest flights from Louisville to Seattle
Explore the most affordable flight options available from Louisville to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/15. 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 10/247:15 amSDF - SEA
2 stops16h 53mMultiple Airlines
Sun 10/267:28 pmSEA - SDF
1 stop15h 34mMultiple Airlines
Deal found 9/15$306
This Delta deal was found by Cheapflights users on 9/15. 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 10/146:05 pmSDF - SEA
1 stop6h 58mDelta
Tue 10/211:40 pmSEA - SDF
1 stop7h 21mDelta
Deal found 9/15$317
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/157:32 amSDF - SEA
1 stop10h 14mAmerican Airlines
Mon 10/2010:32 amSEA - SDF
1 stop8h 53mAmerican Airlines
Deal found 9/14$334
This American Airlines deal was found by Cheapflights users on 9/14. 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 10/135:53 pmSDF - SEA
1 stop9h 34mAmerican Airlines
Mon 10/2010:32 amSEA - SDF
1 stop6h 51mAmerican Airlines
Deal found 9/14$351
This Southwest deal was found by Cheapflights users on 9/14. 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 11/111:50 pmSDF - SEA
2 stops12h 05mSouthwest
Thu 11/138:35 amSEA - SDF
1 stop5h 40mSouthwest
Deal found 9/14$356
This American Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 10/176:00 amSDF - SEA
1 stop7h 54mAmerican Airlines
Mon 10/207:44 amSEA - SDF
1 stop9h 39mAmerican Airlines
Deal found 9/14$365
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Sun 11/166:00 amSDF - SEA
1 stop7h 25mAmerican Airlines
Wed 11/199:00 amSEA - SDF
1 stop10h 55mAmerican Airlines
Deal found 9/15$366
This American Airlines deal was found by Cheapflights users on 9/15. 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 10/74:28 pmSDF - SEA
1 stop8h 50mAmerican Airlines
Sat 10/1111:56 pmSEA - SDF
1 stop8h 37mAmerican Airlines
Deal found 9/15$368
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 10/149:01 amSDF - SEA
2 stops10h 19mUnited Airlines
Tue 10/2111:40 pmSEA - SDF
1 stop7h 21mUnited Airlines
Deal found 9/15$370
This Delta deal was found by Cheapflights users on 9/15. 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.
Wed 10/227:15 pmSDF - SEA
1 stop7h 42mDelta
Sun 10/269:55 pmSEA - SDF
1 stop9h 01mDelta
Deal found 9/15$377
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Tue 10/78:45 amSDF - SEA
2 stops9h 47mUnited Airlines
Sat 10/117:00 amSEA - SDF
1 stop7h 13mUnited Airlines
Deal found 9/15$386
This American Airlines deal was found by Cheapflights users on 9/13. 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.
Fri 10/247:32 amSDF - SEA
1 stop10h 14mAmerican Airlines
Mon 10/2711:56 pmSEA - SDF
1 stop9h 32mAmerican Airlines
Deal found 9/13$394

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Seattle 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 16, 2025.
Use the filters below to find and compare flights from Louisville to Seattle that are best for you.

Fly from

Louisville

Fly to

Seattle

Route

Depart

Return

Price

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 2/18

12:00 pm-11:07 pm

1 stop14h 07m

Seattle/Tacoma Intl

Wed 2/25

5:43 am-5:25 pm

1 stop8h 42m

$291

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 10/14

6:05 pm-10:03 pm

1 stop6h 58m

Seattle/Tacoma Intl

Tue 10/21

1:40 pm-12:01 am

1 stop7h 21m

$317

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 11/11

5:50 pm-10:55 pm

1 stop8h 05m

Seattle/Tacoma Intl

Thu 11/13

8:35 am-5:15 pm

1 stop5h 40m

$334

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 10/11

5:53 pm-12:27 am

1 stop9h 34m

Seattle/Tacoma Intl

Mon 10/20

11:44 am-10:25 pm

1 stop7h 41m

$351

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 10/7

4:28 pm-10:18 pm

1 stop8h 50m

Seattle/Tacoma Intl

Sat 10/11

11:56 pm-11:33 am

1 stop8h 37m

$368

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 10/14

9:01 am-4:20 pm

2 stops10h 19m

Seattle/Tacoma Intl

Tue 10/21

11:40 pm-10:01 am

1 stop7h 21m

$370

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 10/22

7:15 pm-11:57 pm

1 stop7h 42m

Seattle/Tacoma Intl

Sun 10/26

9:55 pm-9:56 am

1 stop9h 01m

$377

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 10/7

8:45 am-3:32 pm

2 stops9h 47m

Seattle/Tacoma Intl

Sat 10/11

7:00 am-5:13 pm

1 stop7h 13m

$386

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Fri 10/24

7:32 am-2:46 pm

1 stop10h 14m

Seattle/Tacoma Intl

Mon 10/27

11:56 pm-12:28 pm

1 stop9h 32m

$394

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 11/8

6:00 am-1:54 pm

1 stop10h 54m

$153

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 20 results
1
2

Best time to book a flight from Louisville to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Louisville 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 Louisville to Seattle

How far ahead should I book a flight from Louisville to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Louisville to Seattle. Price data was last updated on September 12, 2025.

The best time to book flights from Louisville to Seattle is 69 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Louisville to Seattle?

Currently, January is the cheapest month in which you can book a flight from Louisville to Seattle (average of $238). Flying from Louisville to Seattle in June is currently the most expensive (average of $387). 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 SDF to SEA?

Find hourly flight availability from Louisville to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

A simple way to save on the total cost of your ticket is to fly from Louisville to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the morning.

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

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

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

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated September 16, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Louisville to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
Delta
8.0
Very good
7,957 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
United Airlines
7.4
Good
8,924 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Food

7.1

Crew

8.5

Comfort

7.8

Boarding

8.1

Overall

8.0

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Anonymous,Aug 2025

MFR - SEA

Great smooth flight. Was hour and half late though. Don't know why

Related info for your journey

Find useful and relevant information for your journey from Louisville to Seattle. 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 Louisville to Seattle?

    There are many flights that can get you from Louisville to Seattle in 6h 58m. Fly via American Airlines, Delta, or Southwest to get the fastest option. Louisville and Seattle are separated by a distance of 1939 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Delta, at $206, was found to be the cheapest airline from Louisville to Seattle.Alternate airlines to your destination round-trip include United Airlines and American Airlines. Delta is 54% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Louisville to Seattle that include hotel bookings?

    Yes. In addition to deals on Louisville to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to Seattle.

  • Can I find deals for business class flights from Louisville to Seattle?

    Yes. Cheapflights offers flight deals from Louisville to Seattle 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 Louisville to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Louisville to Seattle (average of $238). Flying from Louisville to Seattle in June is currently the most expensive (average of $387). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Louisville to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Louisville to Seattle

Discover the top 5 airlines that operate flights from Louisville to Seattle. 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 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$206Average$402FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$270Average$522FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$303Average$444FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$353Average$497FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$506Average$587FlexibilityNo cancel feeOn-time75%

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