Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Louisville to Seattle from $198

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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

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
10:30 pm - 12:40 pm
SEA
-
SDF
11h 10m
1 stop
$394Southwest
Tue, Aug 11 - Mon, Aug 17
Southwest Logo
1:15 pm - 5:55 pm
SDF
-
SEA
7h 40m
1 stop
Southwest Logo
11:05 pm - 11:15 am
SEA
-
SDF
9h 10m
1 stop
$395Southwest
Tue, Sep 1 - Tue, Sep 8
American Airlines Logo
7:18 pm - 12:41 am
SDF
-
SEA
8h 23m
1 stop
American Airlines Logo
11:58 pm - 10:35 am
SEA
-
SDF
7h 37m
1 stop
$396American Airlines
Wed, Jun 10 - Wed, Jun 17
Southwest Logo
4:00 pm - 11:05 pm
SDF
-
SEA
10h 05m
2 stops
Southwest Logo
11:05 pm - 11:15 am
SEA
-
SDF
9h 10m
1 stop
$400Southwest
Tue, Sep 1 - Tue, Sep 8
Southwest Logo
10:50 am - 6:10 pm
SDF
-
SEA
10h 20m
2 stops
Southwest Logo
11:05 pm - 12:10 pm
SEA
-
SDF
10h 05m
2 stops
$405Southwest
Tue, Sep 1 - Tue, Sep 8
Southwest Logo
8:45 am - 2:25 pm
SDF
-
SEA
8h 40m
2 stops
Southwest Logo
9:25 pm - 12:25 pm
SEA
-
SDF
12h 00m
1 stop
$406Southwest
Wed, Jun 24 - Tue, Jun 30
American Airlines Logo
7:18 pm - 12:41 am
SDF
-
SEA
8h 23m
1 stop
American Airlines Logo
6:00 am - 6:35 pm
SEA
-
SDF
9h 35m
1 stop
$407American Airlines
Tue, Jun 30 - Tue, Jul 7
Delta Logo
12:53 pm - 6:52 pm
SDF
-
SEA
8h 59m
1 stop
Delta Logo
11:53 pm - 10:17 am
SEA
-
SDF
7h 24m
1 stop
$408Delta
Tue, Sep 22 - Thu, Oct 8
American Airlines Logo
7:18 pm - 12:41 am
SDF
-
SEA
8h 23m
1 stop
American Airlines Logo
10:50 am - 12:28 am
SEA
-
SDF
10h 38m
1 stop
$410American Airlines
Wed, Jun 10 - Wed, Jun 17
Southwest Logo
3:20 pm - 10:55 pm
SDF
-
SEA
10h 35m
2 stops
Southwest Logo
7:10 am - 5:55 pm
SEA
-
SDF
7h 45m
1 stop
$413Southwest
Mon, Aug 10 - Wed, Aug 19

Delta flights from Louisville to Seattle

Our best Delta deals on Louisville to Seattle flight tickets
Delta
Sep 22
SDF12:53 pmLouisville Intl
8h 59m
1 stop
SEA6:52 pmSeattle/Tacoma Intl
Oct 8
SEA11:53 pmSeattle/Tacoma Intl
7h 24m
1 stop
SDF10:17 amLouisville Intl
$408
Delta
Jul 7
SDF5:28 pmLouisville Intl
8h 05m
1 stop
SEA10:33 pmSeattle/Tacoma Intl
Jul 17
SEA11:59 pmSeattle/Tacoma Intl
9h 01m
1 stop
SDF12:00 pmLouisville Intl
$426
Delta
Aug 28
SDF3:25 pmLouisville Intl
7h 58m
1 stop
SEA8:23 pmSeattle/Tacoma Intl
Aug 31
SEA11:53 pmSeattle/Tacoma Intl
9h 10m
1 stop
SDF12:03 pmLouisville Intl
$439

Southwest flights from Louisville to Seattle

Our best Southwest deals on Louisville to Seattle flight tickets
Southwest
Aug 11
SDF12:10 pmLouisville Intl
9h 00m
1 stop
SEA6:10 pmSeattle/Tacoma Intl
Aug 17
SEA10:30 pmSeattle/Tacoma Intl
11h 10m
1 stop
SDF12:40 pmLouisville Intl
$394
Southwest
Sep 1
SDF1:15 pmLouisville Intl
7h 40m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
Sep 8
SEA11:05 pmSeattle/Tacoma Intl
9h 10m
1 stop
SDF11:15 amLouisville Intl
$395
Southwest
Sep 1
SDF4:00 pmLouisville Intl
10h 05m
2 stops
SEA11:05 pmSeattle/Tacoma Intl
Sep 8
SEA11:05 pmSeattle/Tacoma Intl
9h 10m
1 stop
SDF11:15 amLouisville Intl
$400

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 22, 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 8/11

12:10 pm-6:10 pm

1 stop9h 00m

Seattle/Tacoma Intl

Mon 8/17

10:30 pm-12:40 pm

1 stop11h 10m

$394

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 9/1

1:15 pm-5:55 pm

1 stop7h 40m

Seattle/Tacoma Intl

Tue 9/8

11:05 pm-11:15 am

1 stop9h 10m

$395
Quickest round-trip

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 6/10

7:18 pm-12:41 am

1 stop8h 23m

Seattle/Tacoma Intl

Wed 6/17

11:58 pm-10:35 am

1 stop7h 37m

$396

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 9/1

4:00 pm-11:05 pm

2 stops10h 05m

Seattle/Tacoma Intl

Tue 9/8

11:05 pm-11:15 am

1 stop9h 10m

$400

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 9/1

10:50 am-6:10 pm

2 stops10h 20m

Seattle/Tacoma Intl

Tue 9/8

11:05 pm-12:10 pm

2 stops10h 05m

$405

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 6/24

8:45 am-2:25 pm

2 stops8h 40m

Seattle/Tacoma Intl

Tue 6/30

9:25 pm-12:25 pm

1 stop12h 00m

$406

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 6/30

7:18 pm-12:41 am

1 stop8h 23m

Seattle/Tacoma Intl

Tue 7/7

6:00 am-6:35 pm

1 stop9h 35m

$407

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 9/22

12:53 pm-6:52 pm

1 stop8h 59m

Seattle/Tacoma Intl

Thu 10/8

11:53 pm-10:17 am

1 stop7h 24m

$408

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 6/10

7:18 pm-12:41 am

1 stop8h 23m

Seattle/Tacoma Intl

Wed 6/17

10:50 am-12:28 am

1 stop10h 38m

$410

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Mon 8/10

3:20 pm-10:55 pm

2 stops10h 35m

Seattle/Tacoma Intl

Wed 8/19

7:10 am-5:55 pm

1 stop7h 45m

$413

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $366.

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 $430 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 45m

Direct flights

None
The fastest flight from Louisville to Seattle takes 6h 45m
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 45m, 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 $237Free CancellationRating
7.9
8,447 reviews
Search Delta flights
United AirlinesPriceFrom $264Free CancellationRating
7.4
9,751 reviews
Search United Airlines flights
American AirlinesPriceFrom $270Free CancellationRating
7.1
11,644 reviews
Search American Airlines flights
SouthwestPriceFrom $342Free CancellationRating
7.9
4,277 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $358Free CancellationRating
7.9
12,396 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
Puyallup
Lakewood
Tukwila
Marysville
Cle Elum
Federal Way
Fife
Centralia
Westport
Shoreline
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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 6/21
Sun 6/28
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States