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$124+ 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 6/2. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
may. 4 — may. 111
dom. 5/4
dom. 5/11
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 January or February, booked 37 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 abril 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$275
(Delta)

One-way from

$138
(American Airlines)

Popular in

July

Cheapest in

January

Average price

$477
Provider with most accurate pricing for Louisville Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Louisville Intl-Seattle/Tacoma Intl flights.
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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. 16% potential increase in price ($88 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 April 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 abril 29, 2025.

This Delta deal was found by Cheapflights users on 4/27. 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. 6/1812:53 pmSDF - SEA
1 stop8h 55mDelta
mié. 6/256:00 amSEA - SDF
1 stop6h 59mDelta
Deal found 4/27$275
This American Airlines deal was found by Cheapflights users on 4/28. 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.
mar. 5/205:45 amSDF - SEA
1 stop7h 30mAmerican Airlines
mar. 6/311:20 amSEA - SDF
1 stop6h 43mAmerican Airlines
Deal found 4/28$291
This Mytrip deal was found by Cheapflights users on 4/27. 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.
vie. 5/3012:07 pmSDF - SEA
2 stops15h 03mSpirit Airlines
dom. 6/16:00 amSEA - SDF
2 stops29h 56mSpirit Airlines
Deal found 4/27$310
This United Airlines deal was found by Cheapflights users on 4/27. 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.
lun. 7/216:08 pmSDF - SEA
1 stop8h 51mUnited Airlines
lun. 7/2812:20 amSEA - SDF
1 stop6h 37mUnited Airlines
Deal found 4/27$352
This Southwest deal was found by Cheapflights users on 4/27. 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.
lun. 7/218:40 pmSDF - SEA
1 stop7h 10mSouthwest
mar. 7/2910:55 pmSEA - SDF
2 stops10h 25mSouthwest
Deal found 4/27$377
This Cheapflightsfares deal was found by Cheapflights users on 4/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/182:04 pmSDF - SEA
1 stop11h 46mSun Country Air
dom. 7/2011:59 pmSEA - SDF
1 stop10h 13mSun Country Air
Deal found 4/26$378
This Orbitz deal was found by Cheapflights users on 4/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 6/2012:10 pmSDF - SEA
1 stop13h 40mMultiple Airlines
lun. 6/2312:25 amSEA - SDF
1 stop8h 45mMultiple Airlines
Deal found 4/28$448
This Alaska Airlines deal was found by Cheapflights users on 4/27. 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.
vie. 7/187:01 pmSDF - SEA
1 stop7h 23mAlaska Airlines
mar. 7/228:10 amSEA - SDF
2 stops12h 00mAlaska Airlines
Deal found 4/27$632

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 abril 29, 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

mié. 6/18

12:53 pm-6:48 pm

1 stop8h 55m

Seattle/Tacoma Intl

mié. 6/25

6:00 am-3:59 pm

1 stop6h 59m

$275

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mar. 5/20

5:45 am-10:15 am

1 stop7h 30m

Seattle/Tacoma Intl

mar. 6/3

11:20 am-9:03 pm

1 stop6h 43m

$291

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

vie. 5/30

12:07 pm-12:10 am

2 stops15h 03m

Seattle/Tacoma Intl

dom. 6/1

6:00 am-2:56 pm

2 stops29h 56m

$310

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

lun. 7/21

6:08 pm-11:59 pm

1 stop8h 51m

Seattle/Tacoma Intl

lun. 7/28

12:20 am-9:57 am

1 stop6h 37m

$352

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

lun. 7/21

8:40 pm-12:50 am

1 stop7h 10m

Seattle/Tacoma Intl

mar. 7/29

10:55 pm-12:20 pm

2 stops10h 25m

$377

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

vie. 7/18

2:04 pm-10:50 pm

1 stop11h 46m

Seattle/Tacoma Intl

dom. 7/20

11:59 pm-1:12 pm

1 stop10h 13m

$378

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

vie. 6/20

12:10 pm-10:50 pm

1 stop13h 40m

Seattle/Tacoma Intl

lun. 6/23

12:25 am-12:10 pm

1 stop8h 45m

$448

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mié. 7/2

6:41 pm-11:24 pm

1 stop7h 43m

Seattle/Tacoma Intl

sáb. 7/12

8:05 am-11:10 pm

2 stops12h 05m

$477

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

lun. 6/2

12:07 pm-12:10 am

2 stops15h 03m

$124

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mié. 6/4

5:45 am-10:15 am

1 stop7h 30m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/26

Showing 1-10 of 15 results
1
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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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star

*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 eDreams the most. eDreams 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 April 25, 2025.

The best time to book flights from Louisville to Seattle is 37 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 $405). 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 abril 29, 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 abril 29, 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
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

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
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

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
4,292 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

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
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

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
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

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
9,961 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Entertainment

7.1

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?

    Delta, at $275, was found to be the cheapest airline from Louisville to Seattle.Alternate airlines to your destination round-trip include Southwest and Sun Country Air. Delta is 39% 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 $138 on American Airlines. Other airlines that offer cheap prices include Sun Country Air from $173 and Southwest from $179 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 $405). 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
Renton
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Olympia
Shoreline
Cle Elum
Centralia
Kent
Aberdeen
Lynnwood
Shelton
Silverdale
Redmond
Issaquah

Browse thousands of different options on Cheapflights for your next trip

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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 abril 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$215Average$282FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$238Average$330FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$326Average$470FlexibilityNo cancel feeOn-time71%
DeltaCheapest$336Average$481FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$347Average$562FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$354Average$503FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$416Average$621FlexibilityNo cancel feeOn-time75%

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