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Cheap flights from Louisville to Seattle from $188

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 7/21. 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.
Southwest Logo
12:10 pm - 6:10 pm
SDF
-
SEA
9h 00m
1 stop
Southwest Logo
5:20 am - 3:15 pm
SEA
-
SDF
6h 55m
1 stop
$294Southwest
Tue, Aug 18 - Tue, Aug 25
Delta Logo
5:45 pm - 11:57 pm
SDF
-
SEA
9h 12m
1 stop
Delta Logo
11:10 pm - 9:54 am
SEA
-
SDF
7h 44m
1 stop
$295Delta
Mon, Aug 10 - Wed, Aug 19
Southwest Logo
5:30 am - 1:00 pm
SDF
-
SEA
10h 30m
1 stop
Southwest Logo
7:10 am - 8:35 pm
SEA
-
SDF
10h 25m
2 stops
$300Southwest
Tue, Aug 18 - Tue, Aug 25
Southwest Logo
10:50 am - 6:10 pm
SDF
-
SEA
10h 20m
2 stops
Southwest Logo
11:05 pm - 12:40 pm
SEA
-
SDF
10h 35m
2 stops
$305Southwest
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
3:38 pm - 8:59 pm
SDF
-
SEA
8h 21m
1 stop
American Airlines Logo
5:24 am - 5:39 pm
SEA
-
SDF
9h 15m
1 stop
$311American Airlines
Wed, Nov 4 - Tue, Nov 10
American Airlines Logo
2:36 pm - 9:59 pm
SDF
-
SEA
10h 23m
1 stop
American Airlines Logo
11:56 pm - 9:43 am
SEA
-
SDF
6h 47m
1 stop
$327American Airlines
Tue, Sep 1 - Tue, Sep 8
Delta Logo
1:17 pm - 8:23 pm
SDF
-
SEA
10h 06m
1 stop
Delta Logo
11:59 pm - 11:55 am
SEA
-
SDF
8h 56m
1 stop
$332Delta
Fri, Aug 28 - Mon, Aug 31
Delta Logo
6:00 am - 12:03 pm
SDF
-
SEA
9h 03m
1 stop
Delta Logo
5:10 am - 5:19 pm
SEA
-
SDF
9h 09m
1 stop
$333Delta
Mon, Aug 17 - Fri, Aug 21
Southwest Logo
1:15 pm - 5:55 pm
SDF
-
SEA
7h 40m
1 stop
Southwest Logo
12:15 am - 10:00 am
SEA
-
SDF
6h 45m
1 stop
$335Southwest
Tue, Sep 29 - Mon, Oct 5
Southwest Logo
8:15 am - 3:00 pm
SDF
-
SEA
9h 45m
2 stops
Southwest Logo
5:20 am - 6:20 pm
SEA
-
SDF
10h 00m
1 stop
$340Southwest
Tue, Sep 29 - Tue, Oct 6

American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets
American Airlines
Nov 4
SDF3:38 pmLouisville Intl
8h 21m
1 stop
SEA8:59 pmSeattle/Tacoma Intl
Nov 10
SEA5:24 amSeattle/Tacoma Intl
9h 15m
1 stop
SDF5:39 pmLouisville Intl
$311
American Airlines
Sep 1
SDF2:36 pmLouisville Intl
10h 23m
1 stop
SEA9:59 pmSeattle/Tacoma Intl
Sep 8
SEA11:56 pmSeattle/Tacoma Intl
6h 47m
1 stop
SDF9:43 amLouisville Intl
$327
American Airlines
Jul 15
SDF7:50 pmLouisville Intl
8h 07m
1 stop
SEA12:57 amSeattle/Tacoma Intl
Jul 22
SEA7:26 amSeattle/Tacoma Intl
8h 32m
1 stop
SDF6:58 pmLouisville Intl
$378

United Airlines flights from Louisville to Seattle

Our best United Airlines deals on Louisville to Seattle flight tickets
United Airlines
Sep 1
SDF5:15 amLouisville Intl
7h 21m
1 stop
SEA9:36 amSeattle/Tacoma Intl
Sep 2
SEA5:00 amSeattle/Tacoma Intl
6h 29m
1 stop
SDF2:29 pmLouisville Intl
$357
United Airlines
Sep 1
SDF7:10 amLouisville Intl
11h 29m
2 stops
SEA3:39 pmSeattle/Tacoma Intl
Sep 2
SEA5:00 amSeattle/Tacoma Intl
6h 29m
1 stop
SDF2:29 pmLouisville Intl
$362
United Airlines
Sep 1
SDF9:45 amLouisville Intl
8h 07m
1 stop
SEA2:52 pmSeattle/Tacoma Intl
Sep 8
SEA4:45 pmSeattle/Tacoma Intl
13h 52m
2 stops
SDF9:37 amLouisville Intl
$412

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 May 30, 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

Tue 8/18

12:10 pm-6:10 pm

1 stop9h 00m

Seattle/Tacoma Intl

Tue 8/25

5:20 am-3:15 pm

1 stop6h 55m

$294

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Mon 8/10

5:45 pm-11:57 pm

1 stop9h 12m

Seattle/Tacoma Intl

Wed 8/19

11:10 pm-9:54 am

1 stop7h 44m

$295

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 8/18

5:30 am-1:00 pm

1 stop10h 30m

Seattle/Tacoma Intl

Tue 8/25

7:10 am-8:35 pm

2 stops10h 25m

$300

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 8/18

10:50 am-6:10 pm

2 stops10h 20m

Seattle/Tacoma Intl

Tue 8/25

11:05 pm-12:40 pm

2 stops10h 35m

$305

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 11/4

3:38 pm-8:59 pm

1 stop8h 21m

Seattle/Tacoma Intl

Tue 11/10

5:24 am-5:39 pm

1 stop9h 15m

$311

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 9/1

2:36 pm-9:59 pm

1 stop10h 23m

Seattle/Tacoma Intl

Tue 9/8

11:56 pm-9:43 am

1 stop6h 47m

$327

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Fri 8/28

1:17 pm-8:23 pm

1 stop10h 06m

Seattle/Tacoma Intl

Mon 8/31

11:59 pm-11:55 am

1 stop8h 56m

$332

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Mon 8/17

6:00 am-12:03 pm

1 stop9h 03m

Seattle/Tacoma Intl

Fri 8/21

5:10 am-5:19 pm

1 stop9h 09m

$333
Quickest round-trip

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 9/29

1:15 pm-5:55 pm

1 stop7h 40m

Seattle/Tacoma Intl

Mon 10/5

12:15 am-10:00 am

1 stop6h 45m

$335

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 9/29

8:15 am-3:00 pm

2 stops9h 45m

Seattle/Tacoma Intl

Tue 10/6

5:20 am-6:20 pm

1 stop10h 00m

$340

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 $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 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 $434 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 $348 on momondo.

How have Louisville to Seattle flight prices changed over time?

As of May 2026, prices for Louisville to Seattle flights are approximately 94% 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

6h 47m

Direct flights

None
The fastest flight from Louisville to Seattle takes 6h 47m
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 6h 47m, 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 $238Free CancellationRating
7.9
8,416 reviews
Search Delta flights
United AirlinesPriceFrom $269Free CancellationRating
7.4
9,766 reviews
Search United Airlines flights
American AirlinesPriceFrom $270Free CancellationRating
7.1
11,639 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
8.0
4,262 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $358Free CancellationRating
7.9
12,433 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
Puyallup
Tukwila
Marysville
Cle Elum
Federal Way
Fife
Centralia
Shoreline
Westport
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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