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Cheap flights from Louisville to Seattle from $169

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 2/17. 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.
United Airlines Logo
3:15 pm - 9:12 pm
SDF
-
SEA
8h 57m
1 stop
United Airlines Logo
10:55 am - 8:09 pm
SEA
-
SDF
6h 14m
1 stop
$321United Airlines
Tue, Feb 17 - Wed, Feb 25
Southwest Logo
6:00 am - 10:45 am
SDF
-
SEA
7h 45m
1 stop
Southwest Logo
6:45 am - 10:10 pm
SEA
-
SDF
12h 25m
1 stop
$327Southwest
Tue, Feb 10 - Wed, Feb 11
Southwest Logo
12:50 pm - 10:30 pm
SDF
-
SEA
12h 40m
2 stops
Southwest Logo
6:45 am - 10:10 pm
SEA
-
SDF
12h 25m
1 stop
$332Southwest
Tue, Feb 10 - Wed, Feb 11
United Airlines Logo
7:20 am - 11:48 am
SDF
-
SEA
7h 28m
1 stop
United Airlines Logo
12:54 pm - 10:39 pm
SEA
-
SDF
6h 45m
1 stop
$337United Airlines
Wed, Apr 15 - Wed, Apr 22
American Airlines Logo
11:59 am - 12:24 am
SDF
-
SEA
15h 25m
1 stop
American Airlines Logo
11:45 am - 11:58 pm
SEA
-
SDF
9h 13m
1 stop
$339American Airlines
Sat, Mar 14 - Tue, Mar 24
United Airlines Logo
7:05 am - 11:49 am
SDF
-
SEA
7h 44m
1 stop
United Airlines Logo
11:59 pm - 1:32 pm
SEA
-
SDF
10h 33m
1 stop
$340United Airlines
Wed, Mar 11 - Mon, Mar 16
United Airlines Logo
3:15 pm - 11:16 pm
SDF
-
SEA
11h 01m
2 stops
United Airlines Logo
5:00 am - 2:19 pm
SEA
-
SDF
6h 19m
1 stop
$342United Airlines
Wed, Mar 11 - Tue, Mar 17
American Airlines Logo
8:02 pm - 12:55 am
SDF
-
SEA
7h 53m
1 stop
American Airlines Logo
6:00 am - 4:29 pm
SEA
-
SDF
7h 29m
1 stop
$343American Airlines
Thu, Feb 12 - Wed, Feb 18
Southwest Logo
1:30 pm - 6:20 pm
SDF
-
SEA
7h 50m
1 stop
Southwest Logo
11:55 pm - 12:45 pm
SEA
-
SDF
9h 50m
2 stops
$345Southwest
Wed, Mar 11 - Mon, Mar 16
Southwest Logo
5:10 pm - 11:05 pm
SDF
-
SEA
8h 55m
1 stop
Southwest Logo
5:15 am - 7:15 pm
SEA
-
SDF
11h 00m
1 stop
$346Southwest
Tue, Feb 24 - Thu, Feb 26

Southwest flights from Louisville to Seattle

Our best Southwest deals on Louisville to Seattle flight tickets
Southwest
Feb 10
SDF6:00 amLouisville Intl
7h 45m
1 stop
SEA10:45 amSeattle/Tacoma Intl
Feb 11
SEA6:45 amSeattle/Tacoma Intl
12h 25m
1 stop
SDF10:10 pmLouisville Intl
$327
Southwest
Feb 10
SDF12:50 pmLouisville Intl
12h 40m
2 stops
SEA10:30 pmSeattle/Tacoma Intl
Feb 11
SEA6:45 amSeattle/Tacoma Intl
12h 25m
1 stop
SDF10:10 pmLouisville Intl
$332
Southwest
Mar 11
SDF8:55 amLouisville Intl
6h 50m
1 stop
SEA12:45 pmSeattle/Tacoma Intl
Mar 16
SEA11:55 pmSeattle/Tacoma Intl
7h 35m
1 stop
SDF10:30 amLouisville Intl
$340

United Airlines flights from Louisville to Seattle

Our best United Airlines deals on Louisville to Seattle flight tickets
United Airlines
Feb 17
SDF3:15 pmLouisville Intl
8h 57m
1 stop
SEA9:12 pmSeattle/Tacoma Intl
Feb 25
SEA10:55 amSeattle/Tacoma Intl
6h 14m
1 stop
SDF8:09 pmLouisville Intl
$321
United Airlines
Apr 15
SDF7:20 amLouisville Intl
7h 28m
1 stop
SEA11:48 amSeattle/Tacoma Intl
Apr 22
SEA12:54 pmSeattle/Tacoma Intl
6h 45m
1 stop
SDF10:39 pmLouisville Intl
$337
United Airlines
Mar 11
SDF3:15 pmLouisville Intl
11h 01m
2 stops
SEA11:16 pmSeattle/Tacoma Intl
Mar 17
SEA5:00 amSeattle/Tacoma Intl
6h 19m
1 stop
SDF2:19 pmLouisville Intl
$342

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 January 21, 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

Tue 2/17

3:15 pm-9:12 pm

1 stop8h 57m

Seattle/Tacoma Intl

Wed 2/25

10:55 am-8:09 pm

1 stop6h 14m

$321

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 2/10

6:00 am-10:45 am

1 stop7h 45m

Seattle/Tacoma Intl

Wed 2/11

6:45 am-10:10 pm

1 stop12h 25m

$327

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 2/10

12:50 pm-10:30 pm

2 stops12h 40m

Seattle/Tacoma Intl

Wed 2/11

6:45 am-10:10 pm

1 stop12h 25m

$332

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 4/15

7:20 am-11:48 am

1 stop7h 28m

Seattle/Tacoma Intl

Wed 4/22

12:54 pm-10:39 pm

1 stop6h 45m

$337

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 3/14

11:59 am-12:24 am

1 stop15h 25m

Seattle/Tacoma Intl

Tue 3/24

11:45 am-11:58 pm

1 stop9h 13m

$339

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 3/11

7:05 am-11:49 am

1 stop7h 44m

Seattle/Tacoma Intl

Mon 3/16

11:59 pm-1:32 pm

1 stop10h 33m

$340

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 3/11

3:15 pm-11:16 pm

2 stops11h 01m

Seattle/Tacoma Intl

Tue 3/17

5:00 am-2:19 pm

1 stop6h 19m

$342

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 2/12

8:02 pm-12:55 am

1 stop7h 53m

Seattle/Tacoma Intl

Wed 2/18

6:00 am-4:29 pm

1 stop7h 29m

$343

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 3/11

1:30 pm-6:20 pm

1 stop7h 50m

Seattle/Tacoma Intl

Mon 3/16

11:55 pm-12:45 pm

2 stops9h 50m

$345

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 2/24

5:10 pm-11:05 pm

1 stop8h 55m

Seattle/Tacoma Intl

Thu 2/26

5:15 am-7:15 pm

1 stop11h 00m

$346

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 $359. 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 $436 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 $362 on momondo.

Can stopping save me money on Louisville to Seattle flights?

You could potentially save up to 6% 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 January 2026, prices for Louisville to Seattle flights are approximately 8% cheaper 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 50m

Direct flights

None
The fastest flight from Louisville to Seattle takes 6h 50m
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 50m, 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
8,089 reviews
Search Delta flights
United AirlinesPriceFrom $269Free CancellationRating
7.4
9,191 reviews
Search United Airlines flights
American AirlinesPriceFrom $291Free CancellationRating
7.2
11,174 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,266 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $430Free CancellationRating
8.0
11,775 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
Tukwila
Lakewood
Federal Way
Centralia
Westport
Kirkland
Fife
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.

An easier way to manage your Seattle trip

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