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Cheap flights from Louisville to Seattle from $182

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 9/5. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Louisville to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:18 pm - 12:13 amSDF  Louisville Intl-SEA Seattle/Tacoma Intl
7h 55m1 stop Chicago O'Hare Intl
American Airlines Logo
7:51 am - 6:50 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
7h 59m1 stop Dallas/Fort Worth
$363American Airlines
Sa, Sep 5 - Fr, Sep 11
Delta Logo
5:35 pm - 10:05 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
7h 30m1 stop Detroit Metropolitan Wayne County
Delta Logo
5:30 am - 5:19 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
8h 49m1 stop Detroit Metropolitan Wayne County
$363Delta
Sa, Sep 5 - So, Sep 6
United Airlines Logo
3:25 pm - 9:31 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
9h 06m1 stop Denver Intl
United Airlines Logo
11:00 pm - 9:54 amSEA  Seattle/Tacoma Intl-SDF Louisville Intl
7h 54m1 stop Chicago O'Hare Intl
$363United Airlines
Sa, Sep 5 - Fr, Sep 11
United Airlines Logo
1:56 pm - 8:45 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
9h 49m1 stop Washington, D.C. Dulles Intl
United Airlines Logo
5:00 am - 2:29 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
6h 29m1 stop Denver Intl
$363United Airlines
Sa, Sep 5 - Fr, Sep 11
Delta Logo
5:35 pm - 10:05 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
7h 30m1 stop Detroit Metropolitan Wayne County
Delta Logo
11:05 pm - 9:52 amSEA  Seattle/Tacoma Intl-SDF Louisville Intl
7h 47m1 stop Detroit Metropolitan Wayne County
$363Delta
Sa, Sep 5 - Fr, Sep 11
American Airlines Logo
6:28 am - 1:00 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
9h 32m1 stop Chicago O'Hare Intl
American Airlines Logo
7:51 am - 6:50 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
7h 59m1 stop Dallas/Fort Worth
$364American Airlines
So, Sep 6 - Mi, Sep 9
Southwest Logo
4:45 pm - 11:00 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
9h 15m1 stop Las Vegas Harry Reid Intl
Southwest Logo
9:05 am - 11:10 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
11h 05m2 stops San Diego Phoenix Sky Harbor Intl
$368Southwest
Sa, Sep 5 - Fr, Sep 11
Southwest Logo
4:45 pm - 11:00 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
9h 15m1 stop Las Vegas Harry Reid Intl
Southwest Logo
11:05 pm - 12:40 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
10h 35m2 stops Chicago Midway Baltimore/Washington
$368Southwest
Sa, Sep 5 - Fr, Sep 11
Alaska Airlines Logo
4:25 pm - 9:20 amSDF  Louisville Intl-SEA Seattle/Tacoma Intl
19h 55m2 stops Dallas/Fort Worth San Diego
Alaska Airlines Logo
12:12 pm - 11:25 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
8h 13m1 stop Dallas/Fort Worth
$592Alaska Airlines
Mi, Sep 9 - Do, Sep 10
Alaska Airlines Logo
10:29 am - 3:41 pmSDF  Louisville Intl-SEA Seattle/Tacoma Intl
8h 12m1 stop Chicago O'Hare Intl
Alaska Airlines Logo
6:51 pm - 6:50 pmSEA  Seattle/Tacoma Intl-SDF Louisville Intl
20h 59m2 stops Portland Dallas/Fort Worth
$592Alaska Airlines
Fr, Sep 11 - Fr, Sep 11

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American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets
American Airlines
Sep 6
SDF6:28 amLouisville Intl
9h 32m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
Sep 9
SEA7:51 amSeattle/Tacoma Intl
7h 59m
1 stop
SDF6:50 pmLouisville Intl
$364
American Airlines
Sep 6
SDF4:55 pmLouisville Intl
8h 54m
1 stop
SEA10:49 pmSeattle/Tacoma Intl
Sep 9
SEA6:15 amSeattle/Tacoma Intl
8h 16m
1 stop
SDF5:31 pmLouisville Intl
$377
American Airlines
Aug 31
SDF6:30 pmLouisville Intl
8h 29m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
Sep 2
SEA6:25 amSeattle/Tacoma Intl
8h 34m
1 stop
SDF5:59 pmLouisville Intl
$389

United Airlines flights from Louisville to Seattle

Our best United Airlines deals on Louisville to Seattle flight tickets
United Airlines
Sep 5
SDF3:25 pmLouisville Intl
9h 06m
1 stop
SEA9:31 pmSeattle/Tacoma Intl
Sep 11
SEA11:00 pmSeattle/Tacoma Intl
7h 54m
1 stop
SDF9:54 amLouisville Intl
$363
United Airlines
Sep 10
SDF5:15 amLouisville Intl
7h 21m
1 stop
SEA9:36 amSeattle/Tacoma Intl
Sep 22
SEA11:00 pmSeattle/Tacoma Intl
7h 54m
1 stop
SDF9:54 amLouisville Intl
$378
United Airlines
Sep 5
SDF1:50 pmLouisville Intl
10h 41m
2 stops
SEA9:31 pmSeattle/Tacoma Intl
Sep 12
SEA5:00 amSeattle/Tacoma Intl
6h 29m
1 stop
SDF2:29 pmLouisville Intl
$382

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 August 9, 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 Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Sa 9/5

7:18 pm-12:13 am

1 stop7h 55m

Seattle/Tacoma Intl

Fr 9/11

7:51 am-6:50 pm

1 stop7h 59m

$363

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Sa 9/5

5:35 pm-10:05 pm

1 stop7h 30m

Seattle/Tacoma Intl

So 9/6

5:30 am-5:19 pm

1 stop8h 49m

$363

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Sa 9/5

3:25 pm-9:31 pm

1 stop9h 06m

Seattle/Tacoma Intl

Fr 9/11

11:00 pm-9:54 am

1 stop7h 54m

$363

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Sa 9/5

1:56 pm-8:45 pm

1 stop9h 49m

Seattle/Tacoma Intl

Fr 9/11

5:00 am-2:29 pm

1 stop6h 29m

$363
Quickest round-trip

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Sa 9/5

5:35 pm-10:05 pm

1 stop7h 30m

Seattle/Tacoma Intl

Fr 9/11

11:05 pm-9:52 am

1 stop7h 47m

$363

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

So 9/6

6:28 am-1:00 pm

1 stop9h 32m

Seattle/Tacoma Intl

Mi 9/9

7:51 am-6:50 pm

1 stop7h 59m

$364

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Sa 9/5

4:45 pm-11:00 pm

1 stop9h 15m

Seattle/Tacoma Intl

Fr 9/11

9:05 am-11:10 pm

2 stops11h 05m

$368

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Sa 9/5

4:45 pm-11:00 pm

1 stop9h 15m

Seattle/Tacoma Intl

Fr 9/11

11:05 pm-12:40 pm

2 stops10h 35m

$368

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Mi 9/9

4:25 pm-9:20 am

2 stops19h 55m

Seattle/Tacoma Intl

Do 9/10

12:12 pm-11:25 pm

1 stop8h 13m

$592

LouisvilleSeattle

SDF Louisville Intl - SEA Seattle/Tacoma Intl

SDFSEA

Louisville Intl

Fr 9/11

10:29 am-3:41 pm

1 stop8h 12m

Seattle/Tacoma Intl

Fr 9/11

6:51 pm-6:50 pm

2 stops20h 59m

$592

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?

Prices are currently low for flights on this route.

Typical prices usually range from $456 to $546.
The lowest price recently found on this route was $363.

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 $299. If you don’t want to visit Seattle in January, then you should wait until February to fly from Louisville, when ticket prices are also cheap, with an average price of $370.

How far in advance should I book a flight from Louisville 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 $451 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 $389 on momondo.

How have Louisville to Seattle flight prices changed over time?

As of August 2026, prices for Louisville to Seattle flights are approximately 21% 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

7h 00m

Direct flights

None
The fastest flight from Louisville to Seattle takes 7h 00m
There are no direct flights from Louisville to Seattle. There are no popular flight routes from Louisville to Seattle.
Search flight deals

Frequently asked questions about flying from Louisville to Seattle

  • 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 7h 00m, 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
United AirlinesPriceFrom $276Free CancellationRating
7.4
10,090 reviews
Search United Airlines flights
American AirlinesPriceFrom $280Free CancellationRating
7.1
11,893 reviews
Search American Airlines flights
DeltaPriceFrom $292Free CancellationRating
7.8
8,497 reviews
Search Delta flights
SouthwestPriceFrom $371Free CancellationRating
8.0
4,216 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $430Free CancellationRating
7.9
12,790 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
Kent
Lynnwood
Redmond
Lakewood
Federal Way
Puyallup
Tukwila
Fife
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

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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