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$123+ Cheap flights from Louisville to Seattle (SDF - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
jul. 6 — jul. 131
dom. 7/6
dom. 7/13
1 adult, Economy
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Cheapflights Tip: The best prices from Louisville Intl to Seattle/Tacoma Intl are usually found in October or January, booked 27 days in advance, depart on a Tuesday or Friday and return on a Saturday

Cheap flight deals from Louisville to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated julio 1, 2025.

Round-trip from

$236
(Mytrip)

One-way from

$123
(American Airlines)

Popular in

June

Cheapest in

October

Average price

$553
From Louisville Intl to Seattle/Tacoma Intl
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One-way flight from Louisville Intl to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 14% potential increase in price ($79 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Louisville to Seattle

Cheapest flights from Louisville to Seattle
Explore the most affordable flight options available from Louisville to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on julio 1, 2025.

This Mytrip deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/294:31 pmSDF - SEA
2 stops26h 54mSpirit Airlines
jue. 8/75:30 pmSEA - SDF
2 stops20h 48mSpirit Airlines
Deal found 7/1$236
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/277:10 pmSDF - SEA
1 stop7h 25mSouthwest
mié. 9/31:10 pmSEA - SDF
1 stop6h 30mSouthwest
Deal found 6/30$245
This United Airlines deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/166:08 pmSDF - SEA
1 stop8h 51mUnited Airlines
lun. 8/1811:45 pmSEA - SDF
1 stop7h 17mUnited Airlines
Deal found 7/1$258
This American Airlines deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 10/219:44 amSDF - SEA
1 stop8h 02mAmerican Airlines
mar. 10/2812:34 amSEA - SDF
1 stop10h 09mAmerican Airlines
Deal found 6/30$260
This Delta deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/16:00 amSDF - SEA
1 stop9h 24mDelta
jue. 10/911:55 pmSEA - SDF
1 stop9h 08mDelta
Deal found 7/1$292
This Mytrip deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/182:04 pmSDF - SEA
1 stop11h 43mMultiple Airlines
lun. 7/215:30 pmSEA - SDF
2 stops19h 06mMultiple Airlines
Deal found 6/30$341

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated julio 1, 2025.
Use the filters below to find and compare flights from Louisville to Seattle that are best for you.

Fly from

Louisville

Fly to

Seattle

Route

Depart

Return

Price

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mar. 7/29

4:31 pm-4:25 pm

2 stops26h 54m

Seattle/Tacoma Intl

jue. 8/7

5:30 pm-5:18 pm

2 stops20h 48m

$236

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mié. 8/27

7:10 pm-11:35 pm

1 stop7h 25m

Seattle/Tacoma Intl

mié. 9/3

1:10 pm-10:40 pm

1 stop6h 30m

$245

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

sáb. 8/16

6:08 pm-11:59 pm

1 stop8h 51m

Seattle/Tacoma Intl

lun. 8/18

11:45 pm-10:02 am

1 stop7h 17m

$258

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mar. 10/21

9:44 am-2:46 pm

1 stop8h 02m

Seattle/Tacoma Intl

mar. 10/28

12:34 am-1:43 pm

1 stop10h 09m

$260

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mié. 10/1

6:00 am-12:24 pm

1 stop9h 24m

Seattle/Tacoma Intl

jue. 10/9

11:55 pm-12:03 pm

1 stop9h 08m

$292

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

vie. 7/18

2:04 pm-10:47 pm

1 stop11h 43m

Seattle/Tacoma Intl

lun. 7/21

5:30 pm-3:36 pm

2 stops19h 06m

$341

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

mié. 8/13

6:08 pm-11:41 pm

1 stop8h 33m

$123

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

sáb. 8/9

6:05 pm-11:30 pm

1 stop8h 25m

$136

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

vie. 8/1

6:26 pm-4:25 pm

2 stops24h 59m

$139

LouisvilleSeattle

SDF - SEA

SDFSEA

Louisville Intl

sáb. 8/9

3:20 pm-10:18 pm

1 stop9h 58m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 13 results
1
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Best time to book a flight from Louisville to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Louisville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Louisville to Seattle

How far ahead should I book a flight from Louisville to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Louisville to Seattle. Price data was last updated on June 27, 2025.

The best time to book flights from Louisville to Seattle is 27 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Louisville to Seattle?

Currently, January is the cheapest month in which you can book a flight from Louisville to Seattle (average of $238). Flying from Louisville to Seattle in July is currently the most expensive (average of $390). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SDF to SEA?

Find hourly flight availability from Louisville to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated julio 1, 2025.

A simple way to save on the total cost of your ticket is to fly from Louisville to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 18% on your trip compared to booking a flight in the morning.

What is the cheapest day to fly from Louisville to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Louisville to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Louisville to Seattle flight should consider departing on Wednesday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated julio 1, 2025.
Peruse reviews from past customers who have flown with Southwest, Delta, and United Airlines from Louisville to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Entertainment

7.6

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,273 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Entertainment

7.6

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,973 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Entertainment

7.6

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,858 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Entertainment

7.6

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Entertainment

7.6

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Sun Country Air
6.9
Okay
340 reviews
Southwest
8.0
Very good
4,273 reviews

Boarding

8.2

Entertainment

7.6

Food

7.0

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Related info for your journey

Find useful and relevant information for your journey from Louisville to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Louisville to Seattle round-trip?

    Spirit Airlines, at $236, was found to be the cheapest airline from Louisville to Seattle.Alternate airlines to your destination round-trip include Southwest and United Airlines. Spirit Airlines is 47% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Louisville to Seattle one-way?

    One-way options have recently been found by users for as low as $123 on American Airlines. Other airlines that offer cheap prices include Southwest from $136 and Spirit Airlines from $139 one-way.

  • Can I find deals for flights from Louisville to Seattle that include hotel bookings?

    Yes. In addition to deals on Louisville to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to Seattle.

  • Can I find deals for business class flights from Louisville to Seattle?

    Yes. Cheapflights offers flight deals from Louisville to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Louisville to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Louisville to Seattle (average of $238). Flying from Louisville to Seattle in July is currently the most expensive (average of $390). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Louisville?

Book flights to Louisville if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Lynnwood
Renton
Olympia
Shoreline
Puyallup
Cle Elum
Centralia
Kent
Federal Way
Chehalis
Kirkland
Aberdeen
Shelton

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Top 7 airlines flying from Louisville to Seattle

Discover the top 7 airlines that operate flights from Louisville to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated julio 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$239Average$293FlexibilityNo cancel feeOn-time65%
DeltaCheapest$242Average$425FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$256Average$365FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$291Average$534FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$322Average$447FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$356Average$501FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$436Average$597FlexibilityNo cancel feeOn-time75%

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