$178+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
feb. 26 — mar. 51
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Louisville to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Louisville to Seattle
Cheapest flights from Louisville to SeattleExplore 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 enero 27, 2026.
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 enero 27, 2026.
This American Airlines deal was found by Cheapflights users on 1/25. 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. 3/3112:07 pm
SDF
- SEA
1 stop15h 17m
American Airlines
mié. 4/17:21 am
SEA
- SDF
1 stop11h 05m
American Airlines
Deal found 1/25![American Airlines logo]()
$357
This American Airlines deal was found by Cheapflights users on 1/27. 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.
mié. 3/2512:07 pm
SDF
- SEA
1 stop13h 57m
American Airlines
dom. 3/2912:13 am
SEA
- SDF
1 stop8h 17m
American Airlines
Deal found 1/27![American Airlines logo]()
$364
This American Airlines deal was found by Cheapflights users on 1/27. 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.
sáb. 3/1411:59 am
SDF
- SEA
1 stop15h 25m
American Airlines
lun. 3/2310:08 pm
SEA
- SDF
1 stop8h 43m
American Airlines
Deal found 1/27![American Airlines logo]()
$371
This Southwest deal was found by Cheapflights users on 1/27. 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. 3/258:55 am
SDF
- SEA
1 stop6h 50m
Southwest
lun. 3/3011:55 pm
SEA
- SDF
2 stops9h 50m
Southwest
Deal found 1/27![Southwest logo]()
$377
This American Airlines deal was found by Cheapflights users on 1/26. 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.
lun. 2/2312:07 pm
SDF
- SEA
1 stop13h 57m
American Airlines
lun. 3/27:15 am
SEA
- SDF
1 stop13h 01m
American Airlines
Deal found 1/26![American Airlines logo]()
$381
This American Airlines deal was found by Cheapflights users on 1/26. 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. 2/2412:07 pm
SDF
- SEA
1 stop13h 57m
American Airlines
jue. 2/261:37 pm
SEA
- SDF
1 stop6h 39m
American Airlines
Deal found 1/26![American Airlines logo]()
$383
This Delta deal was found by Cheapflights users on 1/26. 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.
mar. 4/143:17 pm
SDF
- SEA
1 stop9h 48m
Delta
mié. 4/2211:14 pm
SEA
- SDF
1 stop7h 52m
Delta
Deal found 1/26![Delta logo]()
$385
This United Airlines deal was found by Cheapflights users on 1/25. 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.
mar. 2/249:00 am
SDF
- SEA
2 stops12h 26m
United Airlines
jue. 2/265:00 am
SEA
- SDF
1 stop6h 19m
United Airlines
Deal found 1/25![United Airlines logo]()
$390
This Southwest deal was found by Cheapflights users on 1/25. 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.
mar. 2/2412:50 pm
SDF
- SEA
2 stops12h 40m
Southwest
mar. 3/39:55 am
SEA
- SDF
2 stops9h 50m
Southwest
Deal found 1/25![Southwest logo]()
$395
This American Airlines deal was found by Cheapflights users on 1/27. 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.
sáb. 3/1411:59 am
SDF
- SEA
1 stop15h 25m
American Airlines
jue. 3/191:44 pm
SEA
- SDF
1 stop7h 43m
American Airlines
Deal found 1/27![American Airlines logo]()
$397
This Southwest deal was found by Cheapflights users on 1/25. 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.
sáb. 5/23:15 pm
SDF
- SEA
2 stops9h 55m
Southwest
sáb. 5/95:45 am
SEA
- SDF
2 stops12h 05m
Southwest
Deal found 1/25![Southwest logo]()
$401
This Delta deal was found by Cheapflights users on 1/27. 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.
vie. 5/18:10 am
SDF
- SEA
1 stop10h 16m
Delta
sáb. 5/99:40 am
SEA
- SDF
1 stop8h 57m
Delta
Deal found 1/27![Delta logo]()
$411
Find 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 enero 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $357 (American Airlines) |
One-way from | $178 (Kiwi.com) |
Popular in | July |
Cheapest in | January |
Average price | $359 |
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 enero 27, 2026.
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
mié. 3/25
8:55 am-12:45 pm
1 stop6h 50m
Seattle/Tacoma Intl
lun. 3/30
11:55 pm-12:45 pm
2 stops9h 50m
$377
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
mar. 2/24
12:07 pm-12:24 am
1 stop15h 17m
Seattle/Tacoma Intl
mar. 3/3
7:15 am-9:26 pm
1 stop11h 11m
$381
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
mar. 2/24
12:07 pm-11:04 pm
1 stop13h 57m
Seattle/Tacoma Intl
jue. 2/26
1:37 pm-11:16 pm
1 stop6h 39m
$383
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
mié. 3/11
2:17 pm-6:24 pm
1 stop7h 07m
Seattle/Tacoma Intl
mié. 3/18
6:00 am-5:15 pm
1 stop8h 15m
$385
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
mié. 2/25
7:50 am-2:20 pm
1 stop9h 30m
Seattle/Tacoma Intl
mié. 3/4
12:00 pm-11:05 pm
1 stop8h 05m
$385
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
sáb. 5/2
5:45 pm-11:00 pm
1 stop8h 15m
Seattle/Tacoma Intl
sáb. 5/9
5:45 am-4:55 pm
1 stop8h 10m
$385
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
sáb. 4/25
11:00 am-3:51 pm
1 stop7h 51m
Seattle/Tacoma Intl
jue. 5/14
11:26 pm-10:47 am
1 stop8h 21m
$385
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
mié. 3/18
12:48 pm-6:58 pm
1 stop9h 10m
Seattle/Tacoma Intl
mié. 3/25
11:15 pm-10:10 am
1 stop7h 55m
$385
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
mié. 4/15
4:42 pm-8:42 pm
1 stop7h 00m
Seattle/Tacoma Intl
mar. 4/21
6:00 am-4:01 pm
1 stop7h 01m
$385
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
mié. 3/18
12:48 pm-6:58 pm
1 stop9h 10m
Seattle/Tacoma Intl
jue. 3/26
11:15 pm-10:10 am
1 stop7h 55m
$385
Showing 1-10 of 23 results
Compare providers for flights from Louisville to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to Seattle in January.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Louisville-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Louisville-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
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
Prices
More
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 January 23, 2026.
The best time to book flights from Louisville to Seattle is 69 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, December is the cheapest month in which you can book a flight from Louisville to Seattle (average of $118). Flying from Louisville to Seattle in July is currently the most expensive (average of $247). 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’s the top layover airport for flights from Louisville to Seattle?
Share of 1-stop round-trip flights from Louisville to Seattle chosen by Cheapflights users in the past 12 months, using the same layover each way.
Chicago (ORD) – chosen by Cheapflights users on 60% of 1-stop itineraries from Louisville to Seattle on Cheapflights.
What’s the cheapest layover airport for flights from Louisville to Seattle?
Average round-trip fare for 1-stop flights from Louisville to Seattle, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Chicago (ORD) is the most affordable 1-stop option, with an average round-trip price of $299.
What’s the fastest layover option from Louisville to Seattle?
Shortest average travel time for 1-stop one-way flights from Louisville to Seattle, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Chicago (MDW) have the shortest average one-way travel time for 1-stop routes: 7h 13m.
Which airport typically offers the quickest layover for flights from Louisville to Seattle?
Average layover duration for 1-stop one-way flights from Louisville to Seattle, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Chicago (ORD) offer the fastest connection on this route, with an average layover time of 0h 57m.
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 enero 27, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Overall
8.0
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Overall
8.0
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Overall
8.0
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Overall
8.0
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Overall
8.0
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Overall
8.0
Comfort
7.8
Crew
8.5
Food
7.1
Boarding
8.1
Entertainment
7.0
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsTacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Louisville to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Louisville to Seattle
Discover the top 5 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 enero 27, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$206 | Average$408 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$264 | Average$507 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$280 | Average$447 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$496 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$430 | Average$616 | FlexibilityNo cancel fee | On-time75% |