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Cheap flights from Louisville to Seattle from $147

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Louisville to Seattle departing on 4/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Louisville to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:45 pm - 12:59 am
SDF
-
SEA
8h 14m
1 stop
American Airlines Logo
7:31 am - 7:00 pm
SEA
-
SDF
8h 29m
1 stop
$293American Airlines
Wed, May 27 - Wed, Jun 3
Southwest Logo
4:40 pm - 11:35 pm
SDF
-
SEA
9h 55m
2 stops
Southwest Logo
11:45 pm - 9:55 am
SEA
-
SDF
7h 10m
1 stop
$298Southwest
Wed, May 6 - Wed, May 13
American Airlines Logo
5:43 pm - 10:59 pm
SDF
-
SEA
8h 16m
1 stop
American Airlines Logo
7:31 am - 7:00 pm
SEA
-
SDF
8h 29m
1 stop
$313American Airlines
Wed, May 27 - Wed, Jun 3
American Airlines Logo
6:51 am - 2:16 pm
SDF
-
SEA
10h 25m
1 stop
American Airlines Logo
7:31 am - 7:00 pm
SEA
-
SDF
8h 29m
1 stop
$321American Airlines
Wed, May 27 - Wed, Jun 3
American Airlines Logo
7:45 pm - 12:59 am
SDF
-
SEA
8h 14m
1 stop
American Airlines Logo
11:58 pm - 10:17 am
SEA
-
SDF
7h 19m
1 stop
$324American Airlines
Tue, May 26 - Mon, Jun 1
American Airlines Logo
5:43 pm - 10:59 pm
SDF
-
SEA
8h 16m
1 stop
American Airlines Logo
7:31 am - 7:00 pm
SEA
-
SDF
8h 29m
1 stop
$328American Airlines
Thu, May 28 - Tue, Jun 9
Southwest Logo
7:15 pm - 12:10 am
SDF
-
SEA
7h 55m
1 stop
Southwest Logo
9:00 pm - 9:50 am
SEA
-
SDF
9h 50m
2 stops
$329Southwest
Wed, Apr 29 - Mon, May 4
American Airlines Logo
7:45 pm - 12:59 am
SDF
-
SEA
8h 14m
1 stop
American Airlines Logo
11:58 pm - 10:17 am
SEA
-
SDF
7h 19m
1 stop
$341American Airlines
Tue, May 26 - Mon, Jun 1
American Airlines Logo
6:07 am - 10:48 am
SDF
-
SEA
7h 41m
1 stop
American Airlines Logo
10:29 pm - 8:38 am
SEA
-
SDF
7h 09m
1 stop
$354American Airlines
Tue, May 5 - Fri, May 8
American Airlines Logo
5:41 pm - 10:47 pm
SDF
-
SEA
8h 06m
1 stop
American Airlines Logo
11:55 pm - 10:15 am
SEA
-
SDF
7h 20m
1 stop
$355American Airlines
Sat, Apr 25 - Thu, May 14

American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets
American Airlines
May 27
SDF7:45 pmLouisville Intl
8h 14m
1 stop
SEA12:59 amSeattle/Tacoma Intl
Jun 3
SEA7:31 amSeattle/Tacoma Intl
8h 29m
1 stop
SDF7:00 pmLouisville Intl
$293
American Airlines
May 27
SDF5:43 pmLouisville Intl
8h 16m
1 stop
SEA10:59 pmSeattle/Tacoma Intl
Jun 3
SEA7:31 amSeattle/Tacoma Intl
8h 29m
1 stop
SDF7:00 pmLouisville Intl
$313
American Airlines
May 27
SDF6:51 amLouisville Intl
10h 25m
1 stop
SEA2:16 pmSeattle/Tacoma Intl
Jun 3
SEA7:31 amSeattle/Tacoma Intl
8h 29m
1 stop
SDF7:00 pmLouisville Intl
$321

United Airlines flights from Louisville to Seattle

Our best United Airlines deals on Louisville to Seattle flight tickets
United Airlines
Apr 14
SDF5:00 amLouisville Intl
9h 48m
1 stop
SEA11:48 amSeattle/Tacoma Intl
Apr 20
SEA10:35 pmSeattle/Tacoma Intl
7h 35m
1 stop
SDF9:10 amLouisville Intl
$360
United Airlines
Jun 3
SDF5:20 amLouisville Intl
7h 20m
1 stop
SEA9:40 amSeattle/Tacoma Intl
Jun 3
SEA11:52 pmSeattle/Tacoma Intl
6h 10m
1 stop
SDF9:02 amLouisville Intl
$393
United Airlines
May 27
SDF5:20 amLouisville Intl
7h 20m
1 stop
SEA9:40 amSeattle/Tacoma Intl
Jun 3
SEA8:30 amSeattle/Tacoma Intl
12h 29m
2 stops
SDF11:59 pmLouisville Intl
$398

momondo 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, momondo users made 832,500 searches. Data last updated March 26, 2026.
Use the filters below to find and compare flights from Louisville to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 5/27

7:45 pm-12:59 am

1 stop8h 14m

Seattle/Tacoma Intl

Wed 6/3

7:31 am-7:00 pm

1 stop8h 29m

$293

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 5/6

4:40 pm-11:35 pm

2 stops9h 55m

Seattle/Tacoma Intl

Wed 5/13

11:45 pm-9:55 am

1 stop7h 10m

$298

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 5/27

5:43 pm-10:59 pm

1 stop8h 16m

Seattle/Tacoma Intl

Wed 6/3

7:31 am-7:00 pm

1 stop8h 29m

$313

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 5/27

6:51 am-2:16 pm

1 stop10h 25m

Seattle/Tacoma Intl

Wed 6/3

7:31 am-7:00 pm

1 stop8h 29m

$321

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 5/26

7:45 pm-12:59 am

1 stop8h 14m

Seattle/Tacoma Intl

Mon 6/1

11:58 pm-10:17 am

1 stop7h 19m

$324

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 5/28

5:43 pm-10:59 pm

1 stop8h 16m

Seattle/Tacoma Intl

Tue 6/9

7:31 am-7:00 pm

1 stop8h 29m

$328

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 4/29

7:15 pm-12:10 am

1 stop7h 55m

Seattle/Tacoma Intl

Mon 5/4

9:00 pm-9:50 am

2 stops9h 50m

$329

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 5/26

7:45 pm-12:59 am

1 stop8h 14m

Seattle/Tacoma Intl

Mon 6/1

11:58 pm-10:17 am

1 stop7h 19m

$341
Quickest round-trip

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 5/5

6:07 am-10:48 am

1 stop7h 41m

Seattle/Tacoma Intl

Fri 5/8

10:29 pm-8:38 am

1 stop7h 09m

$354

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 4/25

5:41 pm-10:47 pm

1 stop8h 06m

Seattle/Tacoma Intl

Thu 5/14

11:55 pm-10:15 am

1 stop7h 20m

$355

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Louisville to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Louisville and Seattle?

What is the cheapest month to fly to Seattle?

In general, January is the cheapest month to fly from Louisville to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $268. If you don’t want to visit Seattle in January, then you should wait until October to fly from Louisville, when ticket prices are also cheap, with an average price of $367.

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Louisville when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $429 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Louisville for as low as $348 on momondo.

Can stopping save me money on Louisville to Seattle flights?

You could potentially save up to 34% on your flight if you consider stops on a Louisville to Seattle flight.

How have Louisville to Seattle flight prices changed over time?

As of March 2026, prices for Louisville to Seattle flights are approximately 8% more expensive when compared to flights at the same time last year.

When to book flights from Louisville to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Louisville to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Louisville to Seattle (SDF to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Louisville to Seattle

Fastest flight time

6h 54m

Direct flights

None
The fastest flight from Louisville to Seattle takes 6h 54m
There are no direct flights from Louisville to Seattle. There are no popular flight routes from Louisville to Seattle.
Search flight deals

  • How far is Louisville Intl to Seattle/Tacoma Intl by plane?

    The distance between Louisville Intl and Seattle/Tacoma Intl is about 1938.2 mi. Flights usually cover this in 6h 54m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Louisville Intl Airport to Seattle/Tacoma Intl Airport?

    Prices for flights from Louisville Intl Airport to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Louisville Intl Airport to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Louisville Intl Airport to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Louisville Intl Airport to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Louisville to Seattle?

Best airlines flying from Louisville to Seattle

Compare and see reviews for airlines that fly from Louisville to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $206Free CancellationRating
7.9
8,341 reviews
Search Delta flights
United AirlinesPriceFrom $264Free CancellationRating
7.4
9,491 reviews
Search United Airlines flights
American AirlinesPriceFrom $270Free CancellationRating
7.1
11,504 reviews
Search American Airlines flights
SouthwestPriceFrom $336Free CancellationRating
8.0
4,331 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $430Free CancellationRating
7.9
12,120 reviews
Search Alaska Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Redmond
Marysville
Puyallup
Lakewood
Cle Elum
Tukwila
Federal Way
Centralia
Fife
Westport
Kirkland
Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Louisville to Seattle?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Louisville to Seattle. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Louisville to Seattle with flexible booking policies on momondo?

All flight searches from Louisville to Seattle on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Louisville to Seattle?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Louisville.

I’m not ready to book a flight from Louisville to Seattle right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Louisville to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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