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Cheap flights from Louisville to Seattle from $140

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 1/29. 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.
Delta Logo
3:32 pm - 11:15 pm
SDF
-
SEA
10h 43m1 stop
Delta Logo
6:05 am - 6:11 pm
SEA
-
SDF
9h 06m1 stop
$279Delta
Fri, Jan 23 - Tue, Jan 27
United Airlines Logo
5:35 am - 11:32 am
SDF
-
SEA
8h 57m1 stop
United Airlines Logo
9:00 am - 10:24 pm
SEA
-
SDF
10h 24m2 stops
$284United Airlines
Tue, Jan 20 - Wed, Jan 28
American Airlines Logo
1:15 pm - 8:45 pm
SDF
-
SEA
10h 30m1 stop
American Airlines Logo
8:35 am - 8:47 pm
SEA
-
SDF
9h 12m1 stop
$288American Airlines
Sat, Jan 17 - Sun, Jan 18
Delta Logo
3:37 pm - 10:50 pm
SDF
-
SEA
10h 13m1 stop
Delta Logo
12:00 pm - 11:06 pm
SEA
-
SDF
8h 06m1 stop
$290Delta
Sat, Jan 17 - Wed, Jan 28
United Airlines Logo
11:10 am - 6:26 pm
SDF
-
SEA
10h 16m2 stops
United Airlines Logo
8:59 am - 10:13 pm
SEA
-
SDF
10h 14m2 stops
$318United Airlines
Sat, Feb 7 - Thu, Mar 5
United Airlines Logo
3:15 pm - 11:30 pm
SDF
-
SEA
11h 15m2 stops
United Airlines Logo
5:00 am - 2:19 pm
SEA
-
SDF
6h 19m1 stop
$321United Airlines
Tue, Feb 17 - Sat, Feb 21
United Airlines Logo
5:35 am - 1:57 pm
SDF
-
SEA
11h 22m2 stops
United Airlines Logo
7:00 am - 5:37 pm
SEA
-
SDF
7h 37m1 stop
$324United Airlines
Sun, Feb 1 - Sun, Feb 8
Delta Logo
6:00 am - 4:38 pm
SDF
-
SEA
13h 38m2 stops
Delta Logo
6:05 am - 4:19 pm
SEA
-
SDF
7h 14m1 stop
$326Delta
Sat, Jan 17 - Fri, Jan 30
American Airlines Logo
5:00 am - 11:27 am
SDF
-
SEA
9h 27m1 stop
American Airlines Logo
7:15 am - 9:26 pm
SEA
-
SDF
11h 11m1 stop
$328American Airlines
Tue, Mar 10 - Tue, Mar 24
Delta Logo
6:23 am - 6:23 pm
SDF
-
SEA
15h 00m2 stops
Delta Logo
6:05 am - 6:13 pm
SEA
-
SDF
9h 08m1 stop
$329Delta
Sun, Jan 18 - Wed, Jan 28

American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets
American Airlines
Jan 17
SDF1:15 pmLouisville Intl
10h 30m
1 stop
SEA8:45 pmSeattle/Tacoma Intl
Jan 18
SEA8:35 amSeattle/Tacoma Intl
9h 12m
1 stop
SDF8:47 pmLouisville Intl
$288
Find similar
American Airlines
Mar 10
SDF5:00 amLouisville Intl
9h 27m
1 stop
SEA11:27 amSeattle/Tacoma Intl
Mar 24
SEA7:15 amSeattle/Tacoma Intl
11h 11m
1 stop
SDF9:26 pmLouisville Intl
$328
Find similar
American Airlines
Apr 15
SDF5:34 amLouisville Intl
11h 54m
1 stop
SEA2:28 pmSeattle/Tacoma Intl
Apr 22
SEA7:00 amSeattle/Tacoma Intl
10h 55m
1 stop
SDF8:55 pmLouisville Intl
$397
Find similar

Southwest flights from Louisville to Seattle

Our best Southwest deals on Louisville to Seattle flight tickets
Southwest
Jan 20
SDF12:50 pmLouisville Intl
13h 15m
2 stops
SEA11:05 pmSeattle/Tacoma Intl
Jan 28
SEA11:20 amSeattle/Tacoma Intl
9h 00m
2 stops
SDF11:20 pmLouisville Intl
$411
Find similar
Southwest
Feb 17
SDF1:30 pmLouisville Intl
13h 10m
2 stops
SEA11:40 pmSeattle/Tacoma Intl
Feb 21
SEA6:50 amSeattle/Tacoma Intl
10h 40m
2 stops
SDF8:30 pmLouisville Intl
$420
Find similar
Southwest
Mar 5
SDF11:50 amLouisville Intl
12h 25m
2 stops
SEA9:15 pmSeattle/Tacoma Intl
Mar 8
SEA11:55 pmSeattle/Tacoma Intl
9h 30m
2 stops
SDF12:25 pmLouisville Intl
$429
Find similar

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 December 28, 2025.
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

Fri 1/23

3:32 pm-11:15 pm

1 stop10h 43m

Seattle/Tacoma Intl

Tue 1/27

6:05 am-6:11 pm

1 stop9h 06m

$279

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 1/20

5:35 am-11:32 am

1 stop8h 57m

Seattle/Tacoma Intl

Wed 1/28

9:00 am-10:24 pm

2 stops10h 24m

$284

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

1:15 pm-8:45 pm

1 stop10h 30m

Seattle/Tacoma Intl

Sun 1/18

8:35 am-8:47 pm

1 stop9h 12m

$288

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

3:37 pm-10:50 pm

1 stop10h 13m

Seattle/Tacoma Intl

Wed 1/28

12:00 pm-11:06 pm

1 stop8h 06m

$290

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 2/7

11:10 am-6:26 pm

2 stops10h 16m

Seattle/Tacoma Intl

Thu 3/5

8:59 am-10:13 pm

2 stops10h 14m

$318

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 2/17

3:15 pm-11:30 pm

2 stops11h 15m

Seattle/Tacoma Intl

Sat 2/21

5:00 am-2:19 pm

1 stop6h 19m

$321

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sun 2/1

5:35 am-1:57 pm

2 stops11h 22m

Seattle/Tacoma Intl

Sun 2/8

7:00 am-5:37 pm

1 stop7h 37m

$324

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

6:00 am-4:38 pm

2 stops13h 38m

Seattle/Tacoma Intl

Fri 1/30

6:05 am-4:19 pm

1 stop7h 14m

$326

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 3/10

5:00 am-11:27 am

1 stop9h 27m

Seattle/Tacoma Intl

Tue 3/24

7:15 am-9:26 pm

1 stop11h 11m

$328

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sun 1/18

6:23 am-6:23 pm

2 stops15h 00m

Seattle/Tacoma Intl

Wed 1/28

6:05 am-6:13 pm

1 stop9h 08m

$329

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, October 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 $367. If you don’t want to visit Seattle in October, then you should wait until January to fly from Louisville, when ticket prices are also cheap, with an average price of $368.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Louisville in the evening is the least expensive time of day to depart. momondo users have found prices as low as $436 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $526. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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 $440 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 $373 on momondo.

How have Louisville to Seattle flight prices changed over time?

As of December 2025, prices for Louisville to Seattle flights are approximately 33% 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 10m

Direct flights

None
The fastest flight from Louisville to Seattle takes 7h 10m
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 10m, 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 $209Free CancellationRating
7.9
8,019 reviews
Search Delta flights
United AirlinesPriceFrom $270Free CancellationRating
7.4
9,113 reviews
Search United Airlines flights
American AirlinesPriceFrom $292Free CancellationRating
7.2
11,073 reviews
Search American Airlines flights
SouthwestPriceFrom $350Free CancellationRating
8.0
4,256 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $506Free CancellationRating
8.0
11,551 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
Puyallup
Redmond
Tukwila
Federal Way
Cle Elum
Lakewood
Fife
Centralia
Westport
Kirkland
Shoreline

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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