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Cheap flights from Louisville to Seattle from $137

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 4/20. 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
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.
Multiple Airlines Logo
9:21 am - 5:42 pm
SDF
-
SEA
11h 21m
1 stop
Multiple Airlines Logo
10:42 am - 11:41 am
SEA
-
SDF
21h 59m
2 stops
$346Multiple Airlines
Sat, May 9 - Sun, May 17
American Airlines Logo
6:00 am - 1:00 pm
SDF
-
SEA
10h 00m
1 stop
American Airlines Logo
10:08 pm - 8:50 am
SEA
-
SDF
7h 42m
1 stop
$357American Airlines
Tue, Mar 17 - Tue, Mar 24
United Airlines Logo
6:00 am - 1:07 pm
SDF
-
SEA
10h 07m
1 stop
United Airlines Logo
10:55 am - 8:14 pm
SEA
-
SDF
6h 19m
1 stop
$359United Airlines
Tue, Mar 17 - Tue, Mar 24
Southwest Logo
7:05 pm - 11:55 pm
SDF
-
SEA
7h 50m
1 stop
Southwest Logo
11:55 pm - 12:45 pm
SEA
-
SDF
9h 50m
2 stops
$364Southwest
Tue, Mar 17 - Tue, Mar 24
Delta Logo
5:55 pm - 10:15 pm
SDF
-
SEA
7h 20m
1 stop
Delta Logo
11:15 pm - 9:53 am
SEA
-
SDF
7h 38m
1 stop
$367Delta
Tue, Mar 24 - Fri, Mar 27
Southwest Logo
3:30 pm - 12:40 am
SDF
-
SEA
12h 10m
2 stops
Southwest Logo
11:55 pm - 12:45 pm
SEA
-
SDF
9h 50m
2 stops
$369Southwest
Tue, Mar 17 - Tue, Mar 24
American Airlines Logo
7:05 pm - 12:30 am
SDF
-
SEA
8h 25m
1 stop
American Airlines Logo
11:33 pm - 10:43 am
SEA
-
SDF
8h 10m
1 stop
$371American Airlines
Sat, Apr 25 - Thu, May 14
United Airlines Logo
5:43 pm - 10:37 pm
SDF
-
SEA
7h 54m
1 stop
United Airlines Logo
5:00 am - 2:31 pm
SEA
-
SDF
6h 31m
1 stop
$372United Airlines
Thu, Apr 2 - Tue, Apr 7
American Airlines Logo
7:55 pm - 12:44 am
SDF
-
SEA
7h 49m
1 stop
American Airlines Logo
11:33 pm - 10:43 am
SEA
-
SDF
8h 10m
1 stop
$376American Airlines
Sat, Apr 25 - Thu, May 14
Delta Logo
5:35 pm - 11:57 pm
SDF
-
SEA
9h 22m
1 stop
Delta Logo
11:15 pm - 9:53 am
SEA
-
SDF
7h 38m
1 stop
$377Delta
Mon, Mar 23 - Fri, Mar 27

American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets
American Airlines
Mar 17
SDF7:40 amLouisville Intl
8h 20m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
Mar 24
SEA5:30 amSeattle/Tacoma Intl
9h 07m
1 stop
SDF5:37 pmLouisville Intl
$357
American Airlines
Apr 25
SDF7:05 pmLouisville Intl
8h 25m
1 stop
SEA12:30 amSeattle/Tacoma Intl
May 14
SEA11:33 pmSeattle/Tacoma Intl
8h 10m
1 stop
SDF10:43 amLouisville Intl
$371
American Airlines
Apr 25
SDF7:55 pmLouisville Intl
7h 49m
1 stop
SEA12:44 amSeattle/Tacoma Intl
May 14
SEA11:33 pmSeattle/Tacoma Intl
8h 10m
1 stop
SDF10:43 amLouisville Intl
$376

Delta flights from Louisville to Seattle

Our best Delta deals on Louisville to Seattle flight tickets
Delta
Mar 24
SDF5:55 pmLouisville Intl
7h 20m
1 stop
SEA10:15 pmSeattle/Tacoma Intl
Mar 27
SEA11:15 pmSeattle/Tacoma Intl
7h 38m
1 stop
SDF9:53 amLouisville Intl
$367
Delta
Mar 23
SDF5:35 pmLouisville Intl
9h 22m
1 stop
SEA11:57 pmSeattle/Tacoma Intl
Mar 29
SEA6:00 amSeattle/Tacoma Intl
8h 15m
1 stop
SDF5:15 pmLouisville Intl
$377
Delta
May 1
SDF4:42 pmLouisville Intl
10h 12m
1 stop
SEA11:54 pmSeattle/Tacoma Intl
May 9
SEA6:10 amSeattle/Tacoma Intl
6h 36m
1 stop
SDF3:46 pmLouisville Intl
$402

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 February 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

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 5/9

9:21 am-5:42 pm

1 stop11h 21m

Seattle/Tacoma Intl

Sun 5/17

10:42 am-11:41 am

2 stops21h 59m

$346

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 3/17

6:00 am-1:00 pm

1 stop10h 00m

Seattle/Tacoma Intl

Tue 3/24

10:08 pm-8:50 am

1 stop7h 42m

$357

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 3/17

6:00 am-1:07 pm

1 stop10h 07m

Seattle/Tacoma Intl

Tue 3/24

10:55 am-8:14 pm

1 stop6h 19m

$359

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 3/17

7:05 pm-11:55 pm

1 stop7h 50m

Seattle/Tacoma Intl

Tue 3/24

11:55 pm-12:45 pm

2 stops9h 50m

$364

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 3/24

5:55 pm-10:15 pm

1 stop7h 20m

Seattle/Tacoma Intl

Fri 3/27

11:15 pm-9:53 am

1 stop7h 38m

$367

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 3/17

3:30 pm-12:40 am

2 stops12h 10m

Seattle/Tacoma Intl

Tue 3/24

11:55 pm-12:45 pm

2 stops9h 50m

$369

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 4/25

7:05 pm-12:30 am

1 stop8h 25m

Seattle/Tacoma Intl

Thu 5/14

11:33 pm-10:43 am

1 stop8h 10m

$371

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 4/2

5:43 pm-10:37 pm

1 stop7h 54m

Seattle/Tacoma Intl

Tue 4/7

5:00 am-2:31 pm

1 stop6h 31m

$372

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 4/25

7:55 pm-12:44 am

1 stop7h 49m

Seattle/Tacoma Intl

Thu 5/14

11:33 pm-10:43 am

1 stop8h 10m

$376

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Mon 3/23

5:35 pm-11:57 pm

1 stop9h 22m

Seattle/Tacoma Intl

Fri 3/27

11:15 pm-9:53 am

1 stop7h 38m

$377

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 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 $444 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 $359 on momondo.

Can stopping save me money on Louisville to Seattle flights?

You could potentially save up to 12% 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 February 2026, prices for Louisville to Seattle flights are approximately 54% 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 01m

Direct flights

None
The fastest flight from Louisville to Seattle takes 7h 01m
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 7h 01m, 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
8,228 reviews
Search Delta flights
United AirlinesPriceFrom $269Free CancellationRating
7.4
9,335 reviews
Search United Airlines flights
American AirlinesPriceFrom $278Free CancellationRating
7.2
11,334 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,298 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $430Free CancellationRating
8.0
11,918 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
Marysville
Redmond
Puyallup
Cle Elum
Lakewood
Tukwila
Federal Way
Kirkland
Fife
Westport
Centralia
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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