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Cheap flights from Louisville to Seattle from $178

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 8/18. 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.
Delta Logo
4:30 pm - 10:00 pm
SDF
-
SEA
8h 30m
1 stop
Delta Logo
11:59 pm - 11:54 am
SEA
-
SDF
8h 55m
1 stop
$355Delta
Sat, Sep 5 - Mon, Sep 14
Southwest Logo
6:45 pm - 11:35 pm
SDF
-
SEA
7h 50m
1 stop
Southwest Logo
7:00 am - 8:25 pm
SEA
-
SDF
10h 25m
2 stops
$360Southwest
Wed, Aug 26 - Thu, Sep 10
Southwest Logo
11:50 am - 8:15 pm
SDF
-
SEA
11h 25m
2 stops
Southwest Logo
7:00 am - 8:25 pm
SEA
-
SDF
10h 25m
2 stops
$366Southwest
Wed, Aug 26 - Thu, Sep 10
United Airlines Logo
11:00 am - 4:07 pm
SDF
-
SEA
8h 07m
1 stop
United Airlines Logo
1:57 pm - 11:56 pm
SEA
-
SDF
6h 59m
1 stop
$368United Airlines
Wed, Sep 9 - Tue, Sep 15
Southwest Logo
8:15 am - 3:00 pm
SDF
-
SEA
9h 45m
2 stops
Southwest Logo
12:40 pm - 11:00 pm
SEA
-
SDF
7h 20m
1 stop
$373Southwest
Wed, Sep 9 - Tue, Sep 15
Southwest Logo
11:50 am - 8:15 pm
SDF
-
SEA
11h 25m
2 stops
Southwest Logo
7:10 am - 8:35 pm
SEA
-
SDF
10h 25m
2 stops
$379Southwest
Wed, Sep 9 - Tue, Sep 15
Southwest Logo
12:10 pm - 6:10 pm
SDF
-
SEA
9h 00m
1 stop
Southwest Logo
12:40 pm - 11:00 pm
SEA
-
SDF
7h 20m
1 stop
$381Southwest
Tue, Aug 11 - Tue, Aug 18
Multiple Airlines Logo
9:21 am - 5:51 pm
SDF
-
SEA
11h 30m
1 stop
Multiple Airlines Logo
8:53 pm - 9:55 am
SEA
-
SDF
34h 02m
2 stops
$382Multiple Airlines
Sat, Aug 8 - Wed, Sep 2
Southwest Logo
12:10 pm - 6:10 pm
SDF
-
SEA
9h 00m
1 stop
Southwest Logo
7:10 am - 8:35 pm
SEA
-
SDF
10h 25m
2 stops
$386Southwest
Tue, Aug 11 - Tue, Aug 18
Delta Logo
5:25 pm - 10:05 pm
SDF
-
SEA
7h 40m
1 stop
Delta Logo
6:00 am - 5:11 pm
SEA
-
SDF
8h 11m
1 stop
$387Delta
Wed, Sep 2 - Wed, Sep 9

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Southwest flights from Louisville to Seattle

Our best Southwest deals on Louisville to Seattle flight tickets
Southwest
Aug 26
SDF6:45 pmLouisville Intl
7h 50m
1 stop
SEA11:35 pmSeattle/Tacoma Intl
Sep 10
SEA7:00 amSeattle/Tacoma Intl
10h 25m
2 stops
SDF8:25 pmLouisville Intl
$360
Southwest
Aug 26
SDF11:50 amLouisville Intl
11h 25m
2 stops
SEA8:15 pmSeattle/Tacoma Intl
Sep 10
SEA7:00 amSeattle/Tacoma Intl
10h 25m
2 stops
SDF8:25 pmLouisville Intl
$366
Southwest
Sep 9
SDF8:15 amLouisville Intl
9h 45m
2 stops
SEA3:00 pmSeattle/Tacoma Intl
Sep 15
SEA12:40 pmSeattle/Tacoma Intl
7h 20m
1 stop
SDF11:00 pmLouisville Intl
$373

Delta flights from Louisville to Seattle

Our best Delta deals on Louisville to Seattle flight tickets
Delta
Sep 5
SDF4:30 pmLouisville Intl
8h 30m
1 stop
SEA10:00 pmSeattle/Tacoma Intl
Sep 14
SEA11:59 pmSeattle/Tacoma Intl
8h 55m
1 stop
SDF11:54 amLouisville Intl
$355
Delta
Sep 2
SDF5:25 pmLouisville Intl
7h 40m
1 stop
SEA10:05 pmSeattle/Tacoma Intl
Sep 9
SEA6:00 amSeattle/Tacoma Intl
8h 11m
1 stop
SDF5:11 pmLouisville Intl
$387
Delta
Sep 4
SDF7:54 pmLouisville Intl
7h 00m
1 stop
SEA11:54 pmSeattle/Tacoma Intl
Sep 10
SEA6:00 amSeattle/Tacoma Intl
8h 19m
1 stop
SDF5:19 pmLouisville Intl
$406

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 July 20, 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

Sat 9/5

4:30 pm-10:00 pm

1 stop8h 30m

Seattle/Tacoma Intl

Mon 9/14

11:59 pm-11:54 am

1 stop8h 55m

$355

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 8/26

6:45 pm-11:35 pm

1 stop7h 50m

Seattle/Tacoma Intl

Thu 9/10

7:00 am-8:25 pm

2 stops10h 25m

$360

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 8/26

11:50 am-8:15 pm

2 stops11h 25m

Seattle/Tacoma Intl

Thu 9/10

7:00 am-8:25 pm

2 stops10h 25m

$366
Quickest round-trip

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 9/9

11:00 am-4:07 pm

1 stop8h 07m

Seattle/Tacoma Intl

Tue 9/15

1:57 pm-11:56 pm

1 stop6h 59m

$368

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 9/9

8:15 am-3:00 pm

2 stops9h 45m

Seattle/Tacoma Intl

Tue 9/15

12:40 pm-11:00 pm

1 stop7h 20m

$373

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 9/9

11:50 am-8:15 pm

2 stops11h 25m

Seattle/Tacoma Intl

Tue 9/15

7:10 am-8:35 pm

2 stops10h 25m

$379

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 8/11

12:10 pm-6:10 pm

1 stop9h 00m

Seattle/Tacoma Intl

Tue 8/18

12:40 pm-11:00 pm

1 stop7h 20m

$381

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 8/8

9:21 am-5:51 pm

1 stop11h 30m

Seattle/Tacoma Intl

Wed 9/2

8:53 pm-9:55 am

2 stops34h 02m

$382

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 8/11

12:10 pm-6:10 pm

1 stop9h 00m

Seattle/Tacoma Intl

Tue 8/18

7:10 am-8:35 pm

2 stops10h 25m

$386

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 9/2

5:25 pm-10:05 pm

1 stop7h 40m

Seattle/Tacoma Intl

Wed 9/9

6:00 am-5:11 pm

1 stop8h 11m

$387

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 $299. 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 $376.

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 $449 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 $372 on momondo.

How have Louisville to Seattle flight prices changed over time?

As of July 2026, prices for Louisville to Seattle flights are approximately 82% 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 05m

Direct flights

None
The fastest flight from Louisville to Seattle takes 7h 05m
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 05m, 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
American AirlinesPriceFrom $280Free CancellationRating
7.1
11,826 reviews
Search American Airlines flights
DeltaPriceFrom $292Free CancellationRating
7.8
8,476 reviews
Search Delta flights
United AirlinesPriceFrom $292Free CancellationRating
7.4
10,014 reviews
Search United Airlines flights
SouthwestPriceFrom $366Free CancellationRating
8.0
4,241 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $430Free CancellationRating
7.9
12,680 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
Redmond
Kent
Lakewood
Tukwila
Puyallup
Fife
Federal Way
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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