Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Louisville to Seattle from $161

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 1/6. 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.
American Airlines Logo
12:00 pm - 10:15 pmSDF-SEA
13h 15m1 stop
American Airlines Logo
6:00 am - 4:28 pmSEA-SDF
7h 28m1 stop
$292American Airlines
Find Deal
Tue, Feb 17 - Tue, Feb 24
Delta Logo
4:59 pm - 8:46 pmSDF-SEA
6h 47m1 stop
Delta Logo
11:10 pm - 10:01 amSEA-SDF
7h 51m1 stop
$293Delta
Find Deal
Thu, Jan 29 - Sat, Jan 31
Delta Logo
3:37 pm - 10:50 pmSDF-SEA
10h 13m1 stop
Delta Logo
6:05 am - 6:11 pmSEA-SDF
9h 06m1 stop
$294Delta
Find Deal
Sun, Jan 18 - Tue, Jan 27
United Airlines Logo
9:50 am - 6:26 pmSDF-SEA
11h 36m2 stops
United Airlines Logo
5:00 am - 2:26 pmSEA-SDF
6h 26m1 stop
$298United Airlines
Find Deal
Tue, Jan 13 - Thu, Jan 15
Southwest Logo
5:10 pm - 11:05 pmSDF-SEA
8h 55m1 stop
Southwest Logo
8:45 am - 9:10 pmSEA-SDF
9h 25m2 stops
$299Southwest
Find Deal
Sun, Jan 18 - Tue, Jan 27
Southwest Logo
12:50 pm - 10:30 pmSDF-SEA
12h 40m2 stops
Southwest Logo
5:15 am - 11:00 pmSEA-SDF
14h 45m2 stops
$309Southwest
Find Deal
Tue, Jan 13 - Thu, Jan 15
American Airlines Logo
8:05 am - 2:02 pmSDF-SEA
8h 57m1 stop
American Airlines Logo
10:13 pm - 10:24 amSEA-SDF
9h 11m1 stop
$310American Airlines
Find Deal
Mon, Jan 5 - Mon, Jan 5
American Airlines Logo
8:07 am - 9:50 pmSDF-SEA
16h 43m1 stop
American Airlines Logo
7:00 am - 6:30 pmSEA-SDF
8h 30m1 stop
$311American Airlines
Find Deal
Sat, Jan 17 - Sat, Jan 24
Southwest Logo
4:45 pm - 9:05 pmSDF-SEA
7h 20m1 stop
Southwest Logo
5:15 am - 4:00 pmSEA-SDF
7h 45m2 stops
$318Southwest
Find Deal
Sat, Jan 17 - Sat, Jan 24
Southwest Logo
1:30 pm - 11:40 pmSDF-SEA
13h 10m2 stops
Southwest Logo
8:45 am - 9:10 pmSEA-SDF
9h 25m2 stops
$337Southwest
Find Deal
Tue, Feb 17 - Tue, Feb 24

American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets
American Airlines
Feb 17
SDF12:00 pmLouisville Intl
13h 15m
1 stop
SEA10:15 pmSeattle/Tacoma Intl
Feb 24
SEA6:00 amSeattle/Tacoma Intl
7h 28m
1 stop
SDF4:28 pmLouisville Intl
$292
Find similar
American Airlines
Jan 5
SDF8:05 amLouisville Intl
8h 57m
1 stop
SEA2:02 pmSeattle/Tacoma Intl
Jan 5
SEA10:13 pmSeattle/Tacoma Intl
9h 11m
1 stop
SDF10:24 amLouisville Intl
$310
Find similar
American Airlines
Jan 17
SDF8:07 amLouisville Intl
16h 43m
1 stop
SEA9:50 pmSeattle/Tacoma Intl
Jan 24
SEA7:00 amSeattle/Tacoma Intl
8h 30m
1 stop
SDF6:30 pmLouisville Intl
$311
Find similar

United Airlines flights from Louisville to Seattle

Our best United Airlines deals on Louisville to Seattle flight tickets
United Airlines
Jan 13
SDF9:50 amLouisville Intl
11h 36m
2 stops
SEA6:26 pmSeattle/Tacoma Intl
Jan 15
SEA5:00 amSeattle/Tacoma Intl
6h 26m
1 stop
SDF2:26 pmLouisville Intl
$298
Find similar
United Airlines
Jan 19
SDF2:10 pmLouisville Intl
11h 33m
2 stops
SEA10:43 pmSeattle/Tacoma Intl
Jan 22
SEA10:58 amSeattle/Tacoma Intl
6h 30m
1 stop
SDF8:28 pmLouisville Intl
$364
Find similar
United Airlines
Dec 16
SDF3:33 pmLouisville Intl
10h 42m
2 stops
SEA11:15 pmSeattle/Tacoma Intl
Dec 28
SEA11:59 pmSeattle/Tacoma Intl
7h 04m
1 stop
SDF10:03 amLouisville Intl
$384
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 November 26, 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

Tue 2/17

12:00 pm-10:15 pm

1 stop13h 15m

Seattle/Tacoma Intl

Tue 2/24

6:00 am-4:28 pm

1 stop7h 28m

$292

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 1/29

4:59 pm-8:46 pm

1 stop6h 47m

Seattle/Tacoma Intl

Sat 1/31

11:10 pm-10:01 am

1 stop7h 51m

$293

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sun 1/18

3:37 pm-10:50 pm

1 stop10h 13m

Seattle/Tacoma Intl

Tue 1/27

6:05 am-6:11 pm

1 stop9h 06m

$294

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 1/13

9:50 am-6:26 pm

2 stops11h 36m

Seattle/Tacoma Intl

Thu 1/15

5:00 am-2:26 pm

1 stop6h 26m

$298

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sun 1/18

5:10 pm-11:05 pm

1 stop8h 55m

Seattle/Tacoma Intl

Tue 1/27

8:45 am-9:10 pm

2 stops9h 25m

$299

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 1/13

12:50 pm-10:30 pm

2 stops12h 40m

Seattle/Tacoma Intl

Thu 1/15

5:15 am-11:00 pm

2 stops14h 45m

$309

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Mon 1/5

8:05 am-2:02 pm

1 stop8h 57m

Seattle/Tacoma Intl

Mon 1/5

10:13 pm-10:24 am

1 stop9h 11m

$310

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

8:07 am-9:50 pm

1 stop16h 43m

Seattle/Tacoma Intl

Sat 1/24

7:00 am-6:30 pm

1 stop8h 30m

$311

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

4:45 pm-9:05 pm

1 stop7h 20m

Seattle/Tacoma Intl

Sat 1/24

5:15 am-4:00 pm

2 stops7h 45m

$318

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 2/17

1:30 pm-11:40 pm

2 stops13h 10m

Seattle/Tacoma Intl

Tue 2/24

8:45 am-9:10 pm

2 stops9h 25m

$337

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 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 February to fly from Louisville, when ticket prices are also cheap, with an average price of $394.

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

On average, the least expensive day to fly to Seattle from Louisville is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $417. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Louisville because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $575.

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 $454 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 $374 on momondo.

Can stopping save me money on Louisville to Seattle flights?

You could potentially save up to 20% 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 November 2025, prices for Louisville to Seattle flights are approximately 129% 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 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 $209Free CancellationRating
7.9
8,003 reviews
Search Delta flights
United AirlinesPriceFrom $270Free CancellationRating
7.4
9,050 reviews
Search United Airlines flights
American AirlinesPriceFrom $293Free CancellationRating
7.2
11,037 reviews
Search American Airlines flights
SouthwestPriceFrom $350Free CancellationRating
8.0
4,254 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $506Free CancellationRating
8.0
11,363 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
Cle Elum
Lakewood
Federal Way
Fife
Centralia
Kirkland
Westport
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

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
Fri 12/26
Fri 1/2
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States