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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 1/13. 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
6:25 am - 10:50 amSDF-SEA
7h 25m1 stop
Southwest Logo
9:55 am - 9:10 pmSEA-SDF
8h 15m1 stop
$265Southwest
Find Deal
Mon, Jan 19 - Wed, Feb 4
Southwest Logo
5:10 pm - 11:05 pmSDF-SEA
8h 55m1 stop
Southwest Logo
10:45 am - 10:05 pmSEA-SDF
8h 20m1 stop
$296Southwest
Find Deal
Thu, Jan 29 - Sat, Jan 31
Southwest Logo
6:45 am - 1:15 pmSDF-SEA
9h 30m1 stop
Southwest Logo
5:15 am - 4:00 pmSEA-SDF
7h 45m2 stops
$302Southwest
Find Deal
Thu, Jan 29 - Sat, Jan 31
Southwest Logo
12:50 pm - 10:30 pmSDF-SEA
12h 40m2 stops
Southwest Logo
7:00 am - 10:05 pmSEA-SDF
12h 05m2 stops
$307Southwest
Find Deal
Thu, Jan 29 - Sat, Jan 31
Delta Logo
5:45 pm - 10:50 pmSDF-SEA
8h 05m1 stop
Delta Logo
12:00 pm - 11:06 pmSEA-SDF
8h 06m1 stop
$317Delta
Find Deal
Sat, Jan 17 - Wed, Feb 4
Southwest Logo
6:25 am - 10:50 amSDF-SEA
7h 25m1 stop
Southwest Logo
9:55 am - 10:45 pmSEA-SDF
9h 50m2 stops
$349Southwest
Find Deal
Mon, Jan 19 - Wed, Feb 4
Delta Logo
3:37 pm - 10:50 pmSDF-SEA
10h 13m1 stop
Delta Logo
6:05 am - 6:13 pmSEA-SDF
9h 08m1 stop
$352Delta
Find Deal
Sat, Jan 17 - Thu, Feb 5
Delta Logo
3:37 pm - 10:50 pmSDF-SEA
10h 13m1 stop
Delta Logo
11:15 pm - 4:19 pmSEA-SDF
14h 04m2 stops
$356Delta
Find Deal
Sat, Jan 17 - Tue, Feb 3
Delta Logo
6:23 am - 10:55 amSDF-SEA
7h 32m1 stop
Delta Logo
10:59 pm - 9:26 amSEA-SDF
7h 27m1 stop
$359Delta
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Thu, Jan 29 - Sat, Jan 31
Delta Logo
7:00 am - 12:20 pmSDF-SEA
8h 20m1 stop
Delta Logo
10:59 pm - 9:26 amSEA-SDF
7h 27m1 stop
$367Delta
Find Deal
Wed, Jan 21 - Wed, Feb 4

Southwest flights from Louisville to Seattle

Our best Southwest deals on Louisville to Seattle flight tickets
Southwest
Jan 19
SDF6:25 amLouisville Intl
7h 25m
1 stop
SEA10:50 amSeattle/Tacoma Intl
Feb 4
SEA9:55 amSeattle/Tacoma Intl
8h 15m
1 stop
SDF9:10 pmLouisville Intl
$265
Find similar
Southwest
Jan 29
SDF5:10 pmLouisville Intl
8h 55m
1 stop
SEA11:05 pmSeattle/Tacoma Intl
Jan 31
SEA10:45 amSeattle/Tacoma Intl
8h 20m
1 stop
SDF10:05 pmLouisville Intl
$296
Find similar
Southwest
Jan 29
SDF6:45 amLouisville Intl
9h 30m
1 stop
SEA1:15 pmSeattle/Tacoma Intl
Jan 31
SEA5:15 amSeattle/Tacoma Intl
7h 45m
2 stops
SDF4:00 pmLouisville Intl
$302
Find similar

Delta flights from Louisville to Seattle

Our best Delta deals on Louisville to Seattle flight tickets
Delta
Jan 17
SDF7:50 amLouisville Intl
9h 31m
1 stop
SEA2:21 pmSeattle/Tacoma Intl
Feb 3
SEA10:59 pmSeattle/Tacoma Intl
9h 38m
1 stop
SDF11:37 amLouisville Intl
$317
Find similar
Delta
Jan 17
SDF3:37 pmLouisville Intl
10h 13m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
Feb 5
SEA6:05 amSeattle/Tacoma Intl
9h 08m
1 stop
SDF6:13 pmLouisville Intl
$352
Find similar
Delta
Jan 17
SDF3:37 pmLouisville Intl
10h 13m
1 stop
SEA10:50 pmSeattle/Tacoma Intl
Feb 3
SEA11:15 pmSeattle/Tacoma Intl
14h 04m
2 stops
SDF4:19 pmLouisville Intl
$356
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 1, 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

Mon 1/19

6:25 am-10:50 am

1 stop7h 25m

Seattle/Tacoma Intl

Wed 2/4

9:55 am-9:10 pm

1 stop8h 15m

$265

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 1/29

5:10 pm-11:05 pm

1 stop8h 55m

Seattle/Tacoma Intl

Sat 1/31

10:45 am-10:05 pm

1 stop8h 20m

$296

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 1/29

6:45 am-1:15 pm

1 stop9h 30m

Seattle/Tacoma Intl

Sat 1/31

5:15 am-4:00 pm

2 stops7h 45m

$302

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 1/29

12:50 pm-10:30 pm

2 stops12h 40m

Seattle/Tacoma Intl

Sat 1/31

7:00 am-10:05 pm

2 stops12h 05m

$307

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

5:45 pm-10:50 pm

1 stop8h 05m

Seattle/Tacoma Intl

Wed 2/4

12:00 pm-11:06 pm

1 stop8h 06m

$317

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Mon 1/19

6:25 am-10:50 am

1 stop7h 25m

Seattle/Tacoma Intl

Wed 2/4

9:55 am-10:45 pm

2 stops9h 50m

$349

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

3:37 pm-10:50 pm

1 stop10h 13m

Seattle/Tacoma Intl

Thu 2/5

6:05 am-6:13 pm

1 stop9h 08m

$352

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/17

3:37 pm-10:50 pm

1 stop10h 13m

Seattle/Tacoma Intl

Tue 2/3

11:15 pm-4:19 pm

2 stops14h 04m

$356

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 1/29

6:23 am-10:55 am

1 stop7h 32m

Seattle/Tacoma Intl

Sat 1/31

10:59 pm-9:26 am

1 stop7h 27m

$359

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Wed 1/21

7:00 am-12:20 pm

1 stop8h 20m

Seattle/Tacoma Intl

Wed 2/4

10:59 pm-9:26 am

1 stop7h 27m

$367

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, 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 $452 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 December 2025, prices for Louisville to Seattle flights are approximately 29% 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 01m

Direct flights

None
The fastest flight from Louisville to Seattle takes 7h 01m
There are no direct flights from Louisville to Seattle. There are no popular flight routes from Louisville to Seattle.
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  • 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
8,010 reviews
Search Delta flights
United AirlinesPriceFrom $270Free CancellationRating
7.4
9,065 reviews
Search United Airlines flights
American AirlinesPriceFrom $293Free CancellationRating
7.2
11,041 reviews
Search American Airlines flights
SouthwestPriceFrom $350Free CancellationRating
8.0
4,253 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $506Free CancellationRating
8.0
11,386 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.

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