$161+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
Mrz 30 — Apr 61
1 adult, Economy
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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 Februar 28, 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 Februar 28, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 5/69:21 am
SDF
- SEA
1 stop11h 21m
Multiple Airlines
Mo 5/119:35 pm
SEA
- SDF
2 stops42h 51m
Multiple Airlines
Deal found 2/25![Multiple Airlines logo]()
$310
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 5/56:00 am
SDF
- SEA
1 stop9h 45m
United Airlines
Mi 5/1311:48 pm
SEA
- SDF
1 stop6h 37m
United Airlines
Deal found 2/26![United Airlines logo]()
$321
This Southwest deal was found by Cheapflights users on 2/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 5/54:40 pm
SDF
- SEA
2 stops10h 30m
Southwest
Mi 5/1311:45 pm
SEA
- SDF
1 stop7h 10m
Southwest
Deal found 2/26![Southwest logo]()
$326
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 3/313:36 pm
SDF
- SEA
1 stop8h 30m
United Airlines
Di 4/711:59 pm
SEA
- SDF
1 stop6h 26m
United Airlines
Deal found 2/26![United Airlines logo]()
$339
This Southwest deal was found by Cheapflights users on 2/25. 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.
Do 4/98:10 pm
SDF
- SEA
1 stop6h 55m
Southwest
Mi 4/159:20 am
SEA
- SDF
1 stop10h 10m
Southwest
Deal found 2/25![Southwest logo]()
$340
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Do 4/23:36 pm
SDF
- SEA
1 stop8h 30m
United Airlines
Di 4/75:00 am
SEA
- SDF
1 stop6h 31m
United Airlines
Deal found 2/26![United Airlines logo]()
$349
This Southwest deal was found by Cheapflights users on 2/25. 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.
Mi 5/64:40 pm
SDF
- SEA
2 stops9h 55m
Southwest
Mo 5/1111:55 pm
SEA
- SDF
2 stops9h 45m
Southwest
Deal found 2/25![Southwest logo]()
$351
This Delta deal was found by Cheapflights users on 2/24. 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.
Di 3/245:55 pm
SDF
- SEA
1 stop7h 20m
Delta
Sa 3/2811:50 am
SEA
- SDF
1 stop8h 19m
Delta
Deal found 2/24![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 2/25. 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.
Sa 4/252:30 pm
SDF
- SEA
1 stop9h 23m
United Airlines
Mo 4/2710:35 pm
SEA
- SDF
1 stop7h 50m
United Airlines
Deal found 2/25![United Airlines logo]()
$358
This American Airlines deal was found by Cheapflights users on 2/26. 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.
Do 4/26:33 am
SDF
- SEA
1 stop9h 14m
American Airlines
Mi 4/811:16 am
SEA
- SDF
1 stop9h 32m
American Airlines
Deal found 2/26![American Airlines logo]()
$360
Best flights from Louisville to SeattleDiscover carefully curated flight deals from Louisville to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated Februar 28, 2026.
Discover carefully curated flight deals from Louisville to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated Februar 28, 2026.
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 4/185:54 pm
SDF
- SEA
2 stops18h 00m
Delta
So 4/2611:59 pm
SEA
- SDF
1 stop8h 56m
Delta
Deal found 2/25![Delta logo]()
$381
This Southwest deal was found by Cheapflights users on 2/25. 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.
Fr 5/18:10 pm
SDF
- SEA
1 stop6h 55m
Southwest
Mo 5/411:55 pm
SEA
- SDF
2 stops9h 45m
Southwest
Deal found 2/25![Southwest logo]()
$411
This United Airlines deal was found by Cheapflights users on 2/24. 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.
Sa 4/410:07 am
SDF
- SEA
1 stop8h 56m
United Airlines
So 4/510:35 pm
SEA
- SDF
1 stop7h 50m
United Airlines
Deal found 2/24![United Airlines logo]()
$448
This Delta deal was found by Cheapflights users on 2/23. 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.
Sa 7/253:24 pm
SDF
- SEA
1 stop8h 18m
Delta
Do 8/69:20 pm
SEA
- SDF
1 stop8h 25m
Delta
Deal found 2/23![Delta logo]()
$437
This Southwest deal was found by Cheapflights users on 2/27. 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.
Fr 5/158:10 pm
SDF
- SEA
1 stop6h 55m
Southwest
Mo 5/2511:55 pm
SEA
- SDF
2 stops9h 45m
Southwest
Deal found 2/27![Southwest logo]()
$442
This Delta deal was found by Cheapflights users on 2/23. 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.
Do 7/237:25 pm
SDF
- SEA
1 stop7h 01m
Delta
Mi 8/511:53 pm
SEA
- SDF
1 stop9h 10m
Delta
Deal found 2/23![Delta logo]()
$437
This Southwest deal was found by Cheapflights users on 2/25. 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.
Sa 6/137:55 pm
SDF
- SEA
1 stop8h 15m
Southwest
Sa 7/116:15 am
SEA
- SDF
1 stop10h 45m
Southwest
Deal found 2/25![Southwest logo]()
$472
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Do 7/307:25 pm
SDF
- SEA
1 stop7h 01m
Delta
Mo 8/311:53 pm
SEA
- SDF
1 stop9h 10m
Delta
Deal found 2/25![Delta logo]()
$437
This Delta deal was found by Cheapflights users on 2/23. 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.
Mi 7/227:25 pm
SDF
- SEA
1 stop7h 01m
Delta
Di 8/49:58 pm
SEA
- SDF
1 stop8h 53m
Delta
Deal found 2/23![Delta logo]()
$437
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mi 7/292:15 pm
SDF
- SEA
1 stop9h 14m
Delta
Do 8/69:20 pm
SEA
- SDF
1 stop8h 25m
Delta
Deal found 2/25![Delta logo]()
$437
This Delta deal was found by Cheapflights users on 2/23. 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.
Sa 7/253:24 pm
SDF
- SEA
1 stop8h 18m
Delta
Mo 8/311:53 pm
SEA
- SDF
1 stop9h 10m
Delta
Deal found 2/23![Delta logo]()
$437
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
So 7/263:24 pm
SDF
- SEA
1 stop8h 18m
Delta
Mo 8/311:53 pm
SEA
- SDF
1 stop9h 10m
Delta
Deal found 2/25![Delta logo]()
$458
Last-minute flights from Louisville to SeattleDiscover last-minute flight deals from Louisville to Seattle. Data last updated Februar 28, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Seattle. Data last updated Februar 28, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 3/1711:30 am
SDF
- SEA
1 stop10h 55m
United Airlines
Di 4/2812:54 pm
SEA
- SDF
1 stop6h 45m
United Airlines
Deal found 2/26![United Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 2/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 3/177:05 am
SDF
- SEA
1 stop8h 28m
Delta
Di 3/246:15 am
SEA
- SDF
1 stop7h 15m
Delta
Deal found 2/25![Delta logo]()
$397
This American Airlines deal was found by Cheapflights users on 2/25. 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.
Mi 3/186:00 am
SDF
- SEA
1 stop9h 54m
American Airlines
Do 4/21:44 pm
SEA
- SDF
1 stop7h 43m
American Airlines
Deal found 2/25![American Airlines logo]()
$367
This American Airlines deal was found by Cheapflights users on 2/24. 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.
Fr 3/206:23 pm
SDF
- SEA
1 stop7h 46m
American Airlines
Mo 3/2310:08 pm
SEA
- SDF
1 stop8h 43m
American Airlines
Deal found 2/24![American Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 2/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sa 3/213:15 pm
SDF
- SEA
1 stop8h 59m
United Airlines
Mo 3/2311:59 pm
SEA
- SDF
1 stop10h 33m
United Airlines
Deal found 2/27![United Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 2/24. 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.
Di 3/245:55 pm
SDF
- SEA
1 stop7h 20m
Delta
Sa 3/2811:50 am
SEA
- SDF
1 stop8h 19m
Delta
Deal found 2/24![Delta logo]()
$357
This Delta deal was found by Cheapflights users on 2/24. 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.
Di 3/245:55 pm
SDF
- SEA
1 stop7h 20m
Delta
Fr 3/2711:15 pm
SEA
- SDF
1 stop7h 38m
Delta
Deal found 2/24![Delta logo]()
$408
This United Airlines deal was found by Cheapflights users on 2/25. 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.
Mi 3/257:05 am
SDF
- SEA
1 stop7h 44m
United Airlines
Mi 4/15:00 am
SEA
- SDF
2 stops8h 41m
United Airlines
Deal found 2/25![United Airlines logo]()
$362
This United Airlines deal was found by Cheapflights users on 2/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 3/313:36 pm
SDF
- SEA
1 stop8h 30m
United Airlines
Di 4/711:59 pm
SEA
- SDF
1 stop6h 26m
United Airlines
Deal found 2/26![United Airlines logo]()
$339
One-way flights from Louisville to SeattleSearch for one-way flight options from Louisville to Seattle. Find affordable one-way fares based on user searches. Data last updated Februar 28, 2026.
Search for one-way flight options from Louisville to Seattle. Find affordable one-way fares based on user searches. Data last updated Februar 28, 2026.
This United Airlines deal was found by Cheapflights users on 2/24. 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.
Di 5/52:55 pm
SDF
- SEA
1 stop7h 05m
United Airlines
Deal found 2/24![United Airlines logo]()
$161
This Southwest deal was found by Cheapflights users on 2/24. 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.
Di 5/53:30 pm
SDF
- SEA
2 stops10h 00m
Southwest
Deal found 2/24![Southwest logo]()
$166
This American Airlines deal was found by Cheapflights users on 2/27. 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.
Di 4/76:00 am
SDF
- SEA
1 stop11h 27m
American Airlines
Deal found 2/27![American Airlines logo]()
$177
This American Airlines deal was found by Cheapflights users on 2/23. 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.
Do 4/166:07 am
SDF
- SEA
1 stop7h 41m
American Airlines
Deal found 2/23![American Airlines logo]()
$180
This United Airlines deal was found by Cheapflights users on 2/27. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 4/710:00 am
SDF
- SEA
2 stops11h 00m
United Airlines
Deal found 2/27![United Airlines logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Do 4/161:03 pm
SDF
- SEA
2 stops29h 02m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$186
This American Airlines deal was found by Cheapflights users on 2/23. 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.
Mo 3/236:23 pm
SDF
- SEA
1 stop9h 32m
American Airlines
Deal found 2/23![American Airlines logo]()
$189
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Di 4/712:42 pm
SDF
- SEA
3 stops49h 55m
Multiple Airlines
Deal found 2/27![Multiple Airlines logo]()
$191
This United Airlines deal was found by Cheapflights users on 2/23. 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.
Mo 3/233:15 pm
SDF
- SEA
2 stops11h 01m
United Airlines
Deal found 2/23![United Airlines logo]()
$194
This Kiwi.com deal was found by Cheapflights users on 2/23. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mo 3/239:13 pm
SDF
- SEA
3 stops50h 50m
Multiple Airlines
Deal found 2/23![Multiple Airlines logo]()
$197
This Kiwi.com deal was found by Cheapflights users on 2/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Do 6/43:33 pm
SDF
- SEA
2 stops27h 06m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$205
This American Airlines deal was found by Cheapflights users on 2/25. 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.
Mi 6/243:39 pm
SDF
- SEA
1 stop10h 20m
American Airlines
Deal found 2/25![American Airlines logo]()
$219
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 Februar 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $310 (Kiwi.com) |
One-way from | $161 (United Airlines) |
Popular in | July |
Cheapest in | January |
Average price | $526 |
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 Februar 28, 2026.
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
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Sa 4/18
5:54 pm-8:54 am
2 stops18h 00m
Seattle/Tacoma Intl
So 4/26
11:59 pm-11:55 am
1 stop8h 56m
$381
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Fr 5/1
8:10 pm-12:05 am
1 stop6h 55m
Seattle/Tacoma Intl
Mo 5/4
11:55 pm-12:40 pm
2 stops9h 45m
$411
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Sa 7/25
3:24 pm-8:42 pm
1 stop8h 18m
Seattle/Tacoma Intl
Do 8/6
9:20 pm-8:45 am
1 stop8h 25m
$437
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Do 7/23
7:25 pm-11:26 pm
1 stop7h 01m
Seattle/Tacoma Intl
Mi 8/5
11:53 pm-12:03 pm
1 stop9h 10m
$437
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Do 7/30
7:25 pm-11:26 pm
1 stop7h 01m
Seattle/Tacoma Intl
Mo 8/3
11:53 pm-12:03 pm
1 stop9h 10m
$437
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Mi 7/22
7:25 pm-11:26 pm
1 stop7h 01m
Seattle/Tacoma Intl
Di 8/4
9:58 pm-9:51 am
1 stop8h 53m
$437
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Mi 7/29
2:15 pm-8:29 pm
1 stop9h 14m
Seattle/Tacoma Intl
Do 8/6
9:20 pm-8:45 am
1 stop8h 25m
$437
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Sa 7/25
3:24 pm-8:42 pm
1 stop8h 18m
Seattle/Tacoma Intl
Mo 8/3
11:53 pm-12:03 pm
1 stop9h 10m
$437
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Fr 5/15
8:10 pm-12:05 am
1 stop6h 55m
Seattle/Tacoma Intl
Mo 5/25
11:55 pm-12:40 pm
2 stops9h 45m
$442
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Sa 4/4
10:07 am-4:03 pm
1 stop8h 56m
Seattle/Tacoma Intl
So 4/5
10:35 pm-9:25 am
1 stop7h 50m
$448
Showing 1-10 of 23 resultsSorted by cheapest first
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 February.
| 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.
SDF-SEA
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
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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 February 20, 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 $222). 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 Februar 28, 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.
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
8.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
8.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
8.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
8.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
8.0
Food
7.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentAnonymous,Dec 2025
SJC - SEA
Comfort
7.8
Boarding
8.1
Entertainment
7.0
Overall
8.0
Food
7.1
Crew
8.5
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
Kent
Lynnwood
Edmonds
Lacey
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis
Browse thousands of different options on Cheapflights for your next trip
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Search flights from Louisville to Seattle by cabin class
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Louisville and Seattle flights
Browse other Louisville and Seattle flight options. Last updated on Februar 28, 2026.
Other flights from Louisville
Browse through other flights departing from Louisville. Flights are based on user searches made on Cheapflights and were last updated on Februar 28, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on Februar 28, 2026.
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 Februar 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$206 | Average$412 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$269 | Average$503 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$278 | Average$443 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$485 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$430 | Average$587 | FlexibilityNo cancel fee | On-time75% |