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$136+ 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 8/9. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to Seattle/Tacoma Intl are usually found in January or February, booked 27 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 June 12, 2025.

Round-trip from

$220
(American Airlines)

One-way from

$136
(United Airlines)

Popular in

June

Cheapest in

January

Average price

$556
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. 14% potential increase in price ($79 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 June 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 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 10/212:37 pmSDF - SEA
1 stop12h 13mAmerican Airlines
Thu 10/2311:55 pmSEA - SDF
1 stop6h 29mAmerican Airlines
Deal found 6/11$220
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/48:40 pmSDF - SEA
1 stop7h 10mSouthwest
Mon 8/1111:10 pmSEA - SDF
1 stop10h 15mSouthwest
Deal found 6/12$250
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/274:25 pmSDF - SEA
1 stop10h 09mDelta
Fri 10/312:40 amSEA - SDF
1 stop8h 23mDelta
Deal found 6/10$271
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/94:31 pmSDF - SEA
2 stops26h 54mSpirit Airlines
Wed 7/165:30 pmSEA - SDF
2 stops14h 57mSpirit Airlines
Deal found 6/11$276
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/123:41 pmSDF - SEA
1 stop10h 11mUnited Airlines
Sat 9/205:07 amSEA - SDF
1 stop6h 21mUnited Airlines
Deal found 6/10$308
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/17:40 pmSDF - SEA
2 stops22h 23mMultiple Airlines
Tue 7/83:58 pmSEA - SDF
2 stops13h 58mMultiple Airlines
Deal found 6/11$347
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.
Fri 6/2710:10 amSDF - SEA
1 stop9h 46mSun Country Air
Thu 7/311:59 pmSEA - SDF
1 stop13h 44mSun Country Air
Deal found 6/11$365
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.
Thu 7/312:33 pmSDF - SEA
1 stop9h 02mAlaska Airlines
Thu 7/3112:25 amSEA - SDF
1 stop8h 42mAlaska Airlines
Deal found 6/10$501

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 June 12, 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 10/21

2:37 pm-11:50 pm

1 stop12h 13m

Seattle/Tacoma Intl

Thu 10/23

11:55 pm-9:24 am

1 stop6h 29m

$220

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Mon 8/4

8:40 pm-12:50 am

1 stop7h 10m

Seattle/Tacoma Intl

Mon 8/11

11:10 pm-12:25 pm

1 stop10h 15m

$250

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 9/27

4:25 pm-11:34 pm

1 stop10h 09m

Seattle/Tacoma Intl

Fri 10/3

12:40 am-12:03 pm

1 stop8h 23m

$271

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 7/9

4:31 pm-4:25 pm

2 stops26h 54m

Seattle/Tacoma Intl

Wed 7/16

5:30 pm-11:27 am

2 stops14h 57m

$276

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Fri 9/12

3:41 pm-10:52 pm

1 stop10h 11m

Seattle/Tacoma Intl

Sat 9/20

5:07 am-2:28 pm

1 stop6h 21m

$308

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 7/1

7:40 pm-3:03 pm

2 stops22h 23m

Seattle/Tacoma Intl

Tue 7/8

3:58 pm-8:56 am

2 stops13h 58m

$347

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Fri 6/27

10:10 am-4:56 pm

1 stop9h 46m

Seattle/Tacoma Intl

Thu 7/3

11:59 pm-4:43 pm

1 stop13h 44m

$365

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 7/31

2:33 pm-8:35 pm

1 stop9h 02m

Seattle/Tacoma Intl

Thu 7/31

12:25 am-12:07 pm

1 stop8h 42m

$501

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 8/9

6:08 pm-10:42 pm

1 stop7h 34m

$136

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 7/29

4:31 pm-4:25 pm

2 stops26h 54m

$142

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 15 results
1
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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 June 9, 2025.

The best time to book flights from Louisville to Seattle is 27 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 July is currently the most expensive (average of $391). 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 June 12, 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.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 June 12, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest and Delta from Louisville to Seattle to help guide your decision. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Southwest
8.0
Very good
4,287 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
Delta
8.0
Very good
7,946 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
United Airlines
7.4
Good
8,790 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Food

7.1

Overall

8.0

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

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.

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

    American Airlines, at $220, was found to be the cheapest airline from Louisville to Seattle.Alternate airlines to your destination round-trip include Southwest and Delta. American Airlines is 51% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Louisville to Seattle one-way?

    One-way options have recently been found by users for as low as $136 on United Airlines. Other airlines that offer cheap prices include Spirit Airlines from $142 and Sun Country Air from $158 one-way.

  • 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 July is currently the most expensive (average of $391). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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Top 7 airlines flying from Louisville to Seattle

Discover the top 7 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$239Average$304FlexibilityNo cancel feeOn-time65%
DeltaCheapest$242Average$426FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$256Average$365FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$307Average$539FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$324Average$446FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$356Average$498FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$436Average$611FlexibilityNo cancel feeOn-time75%

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