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$87+ 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 12/13. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
Nov 21 — Nov 281
Fri 11/21
Fri 11/28
1 adult, Economy
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1. Tell us where you want to go

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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

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 October 22, 2025.

This American Airlines deal was found by Cheapflights users on 10/21. 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.
Sat 12/131:42 pmSDF - SEA
1 stop10h 16mAmerican Airlines
Tue 12/1611:34 amSEA - SDF
1 stop7h 43mAmerican Airlines
Deal found 10/21$173
This Delta deal was found by Cheapflights users on 10/21. 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 12/98:35 amSDF - SEA
1 stop9h 00mDelta
Wed 12/177:25 amSEA - SDF
1 stop6h 51mDelta
Deal found 10/21$177
This Delta deal was found by Cheapflights users on 10/21. 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 12/116:35 amSDF - SEA
1 stop7h 19mDelta
Thu 12/186:00 amSEA - SDF
1 stop8h 16mDelta
Deal found 10/21$195
This Delta deal was found by Cheapflights users on 10/21. 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.
Sun 12/76:35 amSDF - SEA
1 stop7h 19mDelta
Mon 12/811:15 pmSEA - SDF
1 stop7h 49mDelta
Deal found 10/21$215
This American Airlines deal was found by Cheapflights users on 10/20. 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.
Thu 11/205:20 pmSDF - SEA
1 stop8h 58mAmerican Airlines
Sat 11/2212:59 amSEA - SDF
1 stop8h 14mAmerican Airlines
Deal found 10/20$257
This United Airlines deal was found by Cheapflights users on 10/21. 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 12/135:57 pmSDF - SEA
1 stop7h 31mUnited Airlines
Tue 12/168:40 amSEA - SDF
2 stops10h 49mUnited Airlines
Deal found 10/21$265
This Delta deal was found by Cheapflights users on 10/20. 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 12/226:06 pmSDF - SEA
1 stop7h 19mDelta
Tue 12/306:00 amSEA - SDF
1 stop8h 26mDelta
Deal found 10/20$287
This American Airlines deal was found by Cheapflights users on 10/22. 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 11/1212:43 pmSDF - SEA
1 stop13h 35mAmerican Airlines
Fri 11/1412:59 amSEA - SDF
1 stop12h 51mAmerican Airlines
Deal found 10/22$303
This Southwest deal was found by Cheapflights users on 10/19. 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.
Sat 11/154:55 pmSDF - SEA
1 stop7h 05mSouthwest
Wed 11/196:35 amSEA - SDF
1 stop7h 00mSouthwest
Deal found 10/19$312
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/159:00 amSDF - SEA
2 stops10h 15mUnited Airlines
Wed 11/195:00 amSEA - SDF
1 stop6h 19mUnited Airlines
Deal found 10/19$317

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 October 22, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$173
(American Airlines)

One-way from

$87
(American Airlines)

Popular in

July

Cheapest in

October

Average price

$376
Provider with most accurate pricing for Louisville Intl-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Seattle/Tacoma Intl flights.
Search Deals
From Louisville Intl to Seattle/Tacoma Intl
Search Deals
One-way flight from Louisville Intl to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($65 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

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 October 22, 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

Tue 12/9

8:35 am-2:35 pm

1 stop9h 00m

Seattle/Tacoma Intl

Wed 12/17

7:25 am-5:16 pm

1 stop6h 51m

$177

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 12/10

12:37 pm-5:00 pm

1 stop7h 23m

Seattle/Tacoma Intl

Wed 12/17

11:15 pm-10:04 am

1 stop7h 49m

$177

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 12/11

6:35 am-10:54 am

1 stop7h 19m

Seattle/Tacoma Intl

Thu 12/18

6:00 am-5:16 pm

1 stop8h 16m

$195

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 2/25

8:19 pm-12:57 am

1 stop7h 38m

Seattle/Tacoma Intl

Fri 2/27

11:59 pm-10:09 am

1 stop7h 10m

$204

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Fri 2/20

3:15 pm-9:14 pm

1 stop8h 59m

Seattle/Tacoma Intl

Mon 2/23

8:17 am-7:42 pm

1 stop8h 25m

$235

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Fri 1/16

1:15 pm-7:04 pm

1 stop8h 49m

Seattle/Tacoma Intl

Mon 1/19

8:35 am-8:47 pm

1 stop9h 12m

$257

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 12/13

5:57 pm-10:28 pm

1 stop7h 31m

Seattle/Tacoma Intl

Tue 12/16

8:40 am-10:29 pm

2 stops10h 49m

$265

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 2/11

7:20 am-2:24 pm

1 stop10h 04m

Seattle/Tacoma Intl

Mon 2/16

11:05 pm-9:57 am

1 stop7h 52m

$307

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 11/15

4:55 pm-9:00 pm

1 stop7h 05m

Seattle/Tacoma Intl

Wed 11/19

6:35 am-4:35 pm

1 stop7h 00m

$312

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 2/25

3:15 pm-9:14 pm

1 stop8h 59m

Seattle/Tacoma Intl

Fri 2/27

9:00 am-10:13 pm

2 stops10h 13m

$324

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 20 results
1
2

Compare providers for flights from Louisville to Seattle

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 Louisville to Seattle in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust 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 Louisville-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub 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 Louisville-Seattle 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 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 October 17, 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 $89). Flying from Louisville to Seattle in July is currently the most expensive (average of $256). 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 October 22, 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 17% 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.

How much does it cost to fly round-trip from Louisville to Seattle?

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 October 22, 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
11,153 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

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
11,153 reviews
Alaska Airlines
8.0
Very good
11,153 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

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
4,237 reviews
Alaska Airlines
8.0
Very good
11,153 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

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
7.9
Good
7,981 reviews
Alaska Airlines
8.0
Very good
11,153 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

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
8,990 reviews
Alaska Airlines
8.0
Very good
11,153 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

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
11,028 reviews
Alaska Airlines
8.0
Very good
11,153 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.0

Crew

8.5

Comfort

7.8

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 7h 38m. Fly via Delta or American Airlines 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 $89). Flying from Louisville to Seattle in July is currently the most expensive (average of $256). 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
Marysville
Puyallup
Chehalis
Kirkland
Fife
Issaquah

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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 October 22, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$206Average$412FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$270Average$522FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$295Average$440FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$353Average$505FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$506Average$587FlexibilityNo cancel feeOn-time75%

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