What is the cheapest airline that flies from Louisville Intl to Seattle/Tacoma Intl?

Southwest and United Airlines are the most popular carriers operating from Louisville Intl to Seattle/Tacoma Intl

Which layover airport has the shortest connection time from Louisville to Seattle?

Dallas (DFW) has the shortest average layover time for this route: 0h 56m.

What airlines fly to Seattle?

Delta, Alaska Airlines and American Airlines are the top three most popular airlines that fly to Seattle from Louisville according to our data. Delta is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 8 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Which layover airport has the shortest travel time from Louisville to Seattle?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 7h 34m.

Which layover airport offers the lowest fares from Louisville to Seattle?

Flights via Dallas (DFW) offer the lowest average round-trip price of $414.

Which airport is the most popular layover for flights between Louisville and Seattle?

Chicago (ORD) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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?

There are 5 operators available for flights from Louisville Intl Airport to Seattle/Tacoma Intl Airport as of December 2025.

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.

$97 Cheap Flights from Louisville to Seattle in 2025/26

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7:40 am - 3:34 pm

SDF

SEA

10h 54m1 stop

8:35 am - 8:47 pm

SEA

SDF

9h 12m1 stop

$180American Airlines

Tue, Jan 13 - Thu, Jan 15

3:32 pm - 10:52 pm

SDF

SEA

10h 20m1 stop

11:10 pm - 10:01 am

SEA

SDF

7h 51m1 stop

$189Delta

Sat, Jan 24 - Wed, Jan 28

5:35 am - 12:20 pm

SDF

SEA

9h 45m1 stop

7:25 am - 11:06 pm

SEA

SDF

12h 41m2 stops

$222Delta

Sat, Jan 24 - Wed, Jan 28

5:35 am - 6:55 pm

SDF

SEA

16h 20m2 stops

7:25 am - 11:06 pm

SEA

SDF

12h 41m2 stops

$305Delta

Sat, Jan 24 - Wed, Jan 28

2:05 pm - 6:14 pm

SDF

SEA

7h 09m1 stop

10:58 am - 10:23 am

SEA

SDF

20h 25m1 stop

$334United Airlines

Sat, Jan 24 - Wed, Jan 28

2:05 pm - 9:15 pm

SDF

SEA

10h 10m2 stops

8:10 am - 7:43 pm

SEA

SDF

8h 33m1 stop

$339United Airlines

Sat, Jan 24 - Wed, Jan 28

5:35 am - 3:44 pm

SDF

SEA

13h 09m2 stops

9:00 am - 10:30 pm

SEA

SDF

10h 30m2 stops

$344United Airlines

Tue, Jan 13 - Thu, Jan 15

8:29 am - 9:12 pm

SDF

SEA

15h 43m3 stops

9:00 am - 10:30 pm

SEA

SDF

10h 30m2 stops

$349United Airlines

Tue, Jan 13 - Thu, Jan 15

5:00 am - 12:37 pm

SDF

SEA

10h 37m1 stop

10:50 am - 8:47 pm

SEA

SDF

6h 57m1 stop

$382American Airlines

Thu, Jan 1 - Thu, Jan 8

5:40 am - 12:03 pm

SDF

SEA

9h 23m1 stop

8:40 am - 10:30 pm

SEA

SDF

10h 50m2 stops

$396United Airlines

Thu, Jan 1 - Mon, Jan 12

American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets

American Airlines

Jan 13

SDF7:40 amLouisville Intl

10h 54m

1 stop

SEA3:34 pmSeattle/Tacoma Intl

Jan 15

SEA8:35 amSeattle/Tacoma Intl

9h 12m

1 stop

SDF8:47 pmLouisville Intl

$180

Find similar

American Airlines

Jan 1

SDF5:00 amLouisville Intl

10h 37m

1 stop

SEA12:37 pmSeattle/Tacoma Intl

Jan 8

SEA10:50 amSeattle/Tacoma Intl

6h 57m

1 stop

SDF8:47 pmLouisville Intl

$382

Find similar

American Airlines

Apr 25

SDF7:53 amLouisville Intl

9h 47m

1 stop

SEA2:40 pmSeattle/Tacoma Intl

May 14

SEA5:47 amSeattle/Tacoma Intl

8h 43m

1 stop

SDF5:30 pmLouisville Intl

$448

Find similar

Delta flights from Louisville to Seattle

Our best Delta deals on Louisville to Seattle flight tickets

Delta

Jan 24

SDF3:32 pmLouisville Intl

10h 20m

1 stop

SEA10:52 pmSeattle/Tacoma Intl

Jan 28

SEA11:10 pmSeattle/Tacoma Intl

7h 51m

1 stop

SDF10:01 amLouisville Intl

$189

Find similar

Delta

Jan 24

SDF5:35 amLouisville Intl

9h 45m

1 stop

SEA12:20 pmSeattle/Tacoma Intl

Jan 28

SEA7:25 amSeattle/Tacoma Intl

12h 41m

2 stops

SDF11:06 pmLouisville Intl

$222

Find similar

Delta

Jan 24

SDF5:35 amLouisville Intl

16h 20m

2 stops

SEA6:55 pmSeattle/Tacoma Intl

Jan 28

SEA7:25 amSeattle/Tacoma Intl

12h 41m

2 stops

SDF11:06 pmLouisville Intl

$305

Find similar

Fly from

Fly to

Route

Depart

Return

Price

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 1/13

7:40 am-3:34 pm

1 stop10h 54m

Seattle/Tacoma Intl

Thu 1/15

8:35 am-8:47 pm

1 stop9h 12m

$180

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/24

3:32 pm-10:52 pm

1 stop10h 20m

Seattle/Tacoma Intl

Wed 1/28

11:10 pm-10:01 am

1 stop7h 51m

$189

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/24

5:35 am-12:20 pm

1 stop9h 45m

Seattle/Tacoma Intl

Wed 1/28

7:25 am-11:06 pm

2 stops12h 41m

$222

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/24

5:35 am-6:55 pm

2 stops16h 20m

Seattle/Tacoma Intl

Wed 1/28

7:25 am-11:06 pm

2 stops12h 41m

$305

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/24

2:05 pm-6:14 pm

1 stop7h 09m

Seattle/Tacoma Intl

Wed 1/28

10:58 am-10:23 am

1 stop20h 25m

$334

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Sat 1/24

2:05 pm-9:15 pm

2 stops10h 10m

Seattle/Tacoma Intl

Wed 1/28

8:10 am-7:43 pm

1 stop8h 33m

$339

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 1/13

5:35 am-3:44 pm

2 stops13h 09m

Seattle/Tacoma Intl

Thu 1/15

9:00 am-10:30 pm

2 stops10h 30m

$344

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Tue 1/13

8:29 am-9:12 pm

3 stops15h 43m

Seattle/Tacoma Intl

Thu 1/15

9:00 am-10:30 pm

2 stops10h 30m

$349

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 1/1

5:00 am-12:37 pm

1 stop10h 37m

Seattle/Tacoma Intl

Thu 1/8

10:50 am-8:47 pm

1 stop6h 57m

$382

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

Thu 1/1

5:40 am-12:03 pm

1 stop9h 23m

Seattle/Tacoma Intl

Mon 1/12

8:40 am-10:30 pm

2 stops10h 50m

$396

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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

Prices

Airlines

Layovers

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	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 7h 05m, 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?
There are 5 operators available for flights from Louisville Intl Airport to Seattle/Tacoma Intl Airport as of December 2025.
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?
momondo data reveals that the most frequently booked airline on the route from Louisville to Seattle is American Airlines, representing 42% of all bookings. The subsequent popular airlines are Delta at 19%, United Airlines at 19%, and Southwest at 15%.

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
Delta	PriceFrom $209	Free Cancellation	Rating 7.9 8,011 reviews	Search Delta flights
United Airlines	PriceFrom $270	Free Cancellation	Rating 7.4 9,066 reviews	Search United Airlines flights
American Airlines	PriceFrom $293	Free Cancellation	Rating 7.2 11,047 reviews	Search American Airlines flights
Southwest	PriceFrom $350	Free Cancellation	Rating 8.0 4,250 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $506	Free Cancellation	Rating 8.0 11,402 reviews	Search Alaska Airlines flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Puyallup

Marysville

Tukwila

Redmond

Cle Elum

Federal Way

Lakewood

Fife

Centralia

Westport

Kirkland

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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Cheap flights from Louisville to Seattle from $97

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 2/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Filter for what you want

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American Airlines flights from Louisville to Seattle

Our best American Airlines deals on Louisville to Seattle flight tickets

Delta flights from Louisville to Seattle

Our best Delta deals on Louisville to Seattle flight tickets

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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?

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

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

How far in advance should I book a flight to Seattle?

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.

What is the cheapest airline that flies from Louisville Intl to Seattle/Tacoma Intl?

Southwest and United Airlines are the most popular carriers operating from Louisville Intl to Seattle/Tacoma Intl

What airlines fly to Seattle?

Which airport is the most popular layover for flights between Louisville and Seattle?

Chicago (ORD) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport offers the lowest fares from Louisville to Seattle?

Flights via Dallas (DFW) offer the lowest average round-trip price of $414.

Which layover airport has the shortest travel time from Louisville to Seattle?

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 7h 34m.

Which layover airport has the shortest connection time from Louisville to Seattle?

Dallas (DFW) has the shortest average layover time for this route: 0h 56m.

When to book flights from Louisville to Seattle

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

Direct flights

How far is Louisville Intl to Seattle/Tacoma Intl by plane?

When did momondo last update prices for flights from Louisville Intl Airport to Seattle/Tacoma Intl Airport?

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?

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

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

Traveling to a place near Seattle?

Why use momondo?

Why should I use momondo to find a flight deal from Louisville to Seattle?

Can I find flights from Louisville to Seattle with flexible booking policies on momondo?

How can momondo help me find flights from Louisville to Seattle?

I’m not ready to book a flight from Louisville to Seattle right now. Can momondo alert me if prices 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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Airports servicing Washington