$150+ Cheap flights from Seattle to Louisville (SEA - SDF)
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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDF
Sep 9 — Sep 161
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Louisville 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 Seattle to Louisville
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One-way
Cheapest flights from Seattle to LouisvilleExplore the most affordable flight options available from Seattle to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
Explore the most affordable flight options available from Seattle to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 10, 2026.
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Sun 9/65:00 am -
1 stop6h 29m
Fri 9/119:00 am -
1 stop10h 07m
Deal found 8/8![United Airlines logo]()
$363
This American Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/35:10 am -
1 stop9h 49m
Sat 9/129:05 am -
1 stop10h 37m
Deal found 8/5![American Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 8/5. 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.
Thu 9/37:16 am -
1 stop9h 14m
Sun 9/65:50 pm -
1 stop9h 07m
Deal found 8/5![Delta logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/31:57 pm -
1 stop7h 02m
Sat 9/121:49 pm -
1 stop8h 25m
Deal found 8/5![United Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/31:57 pm -
1 stop7h 02m
Sun 9/67:10 am -
2 stops10h 14m
Deal found 8/5![United Airlines logo]()
$382
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 9/25:00 am -
1 stop6h 29m
Wed 9/95:15 am -
2 stops9h 42m
Deal found 8/5![United Airlines logo]()
$383
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Mon 9/2811:14 pm -
1 stop8h 04m
Tue 9/293:36 pm -
1 stop8h 39m
Deal found 8/5![United Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 8/5. 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.
Thu 9/36:15 am -
1 stop13h 55m
Sat 9/1212:05 pm -
2 stops12h 25m
Deal found 8/5![Southwest logo]()
$394
This Southwest deal was found by Cheapflights users on 8/7. 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.
Thu 9/1011:05 pm -
2 stops11h 00m
Mon 9/142:15 pm -
1 stop7h 05m
Deal found 8/7![Southwest logo]()
$396
This Southwest deal was found by Cheapflights users on 8/5. 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.
Mon 9/2811:05 pm -
2 stops10h 05m
Wed 9/3010:50 am -
2 stops10h 20m
Deal found 8/5![Southwest logo]()
$401
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/312:44 pm -
1 stop6h 47m
Mon 9/75:15 am -
1 stop7h 20m
Deal found 8/5![United Airlines logo]()
$404
Best flights from Seattle to LouisvilleDiscover carefully curated flight deals from Seattle to Louisville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
Discover carefully curated flight deals from Seattle to Louisville that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 10, 2026.
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Sun 9/65:00 am -
1 stop6h 29m
Fri 9/119:00 am -
1 stop10h 07m
Deal found 8/8![United Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 8/6. 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.
Mon 9/2111:59 pm -
1 stop8h 55m
Tue 9/292:47 pm -
1 stop10h 18m
Deal found 8/6![Delta logo]()
$391
This Southwest deal was found by Cheapflights users on 8/5. 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.
Thu 9/1011:05 pm -
2 stops11h 00m
Mon 9/142:15 pm -
1 stop7h 05m
Deal found 8/5![Southwest logo]()
$396
This United Airlines deal was found by Cheapflights users on 8/6. 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.
Thu 9/35:00 am -
1 stop6h 29m
Sat 9/127:25 am -
1 stop10h 27m
Deal found 8/6![United Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 9/25:00 am -
1 stop6h 29m
Wed 9/95:15 am -
2 stops9h 42m
Deal found 8/5![United Airlines logo]()
$383
This Southwest deal was found by Cheapflights users on 8/8. 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.
Sun 9/66:35 am -
2 stops10h 55m
Fri 9/1111:05 am -
1 stop8h 55m
Deal found 8/8![Southwest logo]()
$450
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Sun 9/65:00 am -
1 stop6h 29m
Sun 9/135:15 am -
1 stop7h 21m
Deal found 8/8![United Airlines logo]()
$415
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 9/1611:04 pm -
1 stop8h 14m
Mon 9/285:15 am -
1 stop7h 21m
Deal found 8/5![United Airlines logo]()
$449
This United Airlines deal was found by Cheapflights users on 8/9. 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.
Mon 11/210:50 am -
1 stop7h 02m
Thu 11/59:02 am -
1 stop9h 30m
Deal found 8/9![United Airlines logo]()
$467
This United Airlines deal was found by Cheapflights users on 8/7. 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.
Tue 10/204:35 pm -
2 stops13h 59m
Sat 10/241:50 pm -
1 stop8h 02m
Deal found 8/7![United Airlines logo]()
$496
Last-minute flights from Seattle to LouisvilleDiscover last-minute flight deals from Seattle to Louisville. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Louisville. Data last updated August 10, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Wed 9/25:00 am -
1 stop6h 29m
Wed 9/95:15 am -
2 stops9h 42m
Deal found 8/5![United Airlines logo]()
$383
This American Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/35:10 am -
1 stop9h 49m
Sat 9/129:05 am -
1 stop10h 37m
Deal found 8/5![American Airlines logo]()
$365
This Delta deal was found by Cheapflights users on 8/5. 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.
Thu 9/37:16 am -
1 stop9h 14m
Sun 9/65:50 pm -
1 stop9h 07m
Deal found 8/5![Delta logo]()
$377
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/31:57 pm -
1 stop7h 02m
Sat 9/121:49 pm -
1 stop8h 25m
Deal found 8/5![United Airlines logo]()
$378
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/31:57 pm -
1 stop7h 02m
Sun 9/67:10 am -
2 stops10h 14m
Deal found 8/5![United Airlines logo]()
$382
This Southwest deal was found by Cheapflights users on 8/5. 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.
Thu 9/36:15 am -
1 stop13h 55m
Sat 9/1212:05 pm -
2 stops12h 25m
Deal found 8/5![Southwest logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Thu 9/312:44 pm -
1 stop6h 47m
Mon 9/75:15 am -
1 stop7h 20m
Deal found 8/5![United Airlines logo]()
$404
This United Airlines deal was found by Cheapflights users on 8/8. 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.
Sun 9/65:00 am -
1 stop6h 29m
Fri 9/119:00 am -
1 stop10h 07m
Deal found 8/8![United Airlines logo]()
$363
This Southwest deal was found by Cheapflights users on 8/7. 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.
Thu 9/1011:05 pm -
2 stops11h 00m
Mon 9/142:15 pm -
1 stop7h 05m
Deal found 8/7![Southwest logo]()
$396
This United Airlines deal was found by Cheapflights users on 8/5. 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.
Mon 9/2811:14 pm -
1 stop8h 04m
Tue 9/293:36 pm -
1 stop8h 39m
Deal found 8/5![United Airlines logo]()
$386
This Southwest deal was found by Cheapflights users on 8/5. 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.
Mon 9/289:05 am -
2 stops11h 05m
Tue 9/294:00 pm -
2 stops10h 10m
Deal found 8/5![Southwest logo]()
$401
One-way flights from Seattle to LouisvilleSearch for one-way flight options from Seattle to Louisville. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
Search for one-way flight options from Seattle to Louisville. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Southwest deal was found by Cheapflights users on 8/9. 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.
Tue 9/2211:05 pm -
1 stop9h 15m
Deal found 8/9![Southwest logo]()
$150
This Delta deal was found by Cheapflights users on 8/9. 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.
Fri 10/3011:50 pm -
1 stop9h 07m
Deal found 8/9![Delta logo]()
$182
This American Airlines deal was found by Cheapflights users on 8/5. 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.
Mon 8/3111:56 pm -
1 stop7h 39m
Deal found 8/5![American Airlines logo]()
$183
This Delta deal was found by Cheapflights users on 8/7. 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.
Mon 8/3111:59 pm -
1 stop8h 56m
Deal found 8/7![Delta logo]()
$196
This American Airlines deal was found by Cheapflights users on 8/4. 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.
Wed 9/2311:57 pm -
1 stop6h 46m
Deal found 8/4![American Airlines logo]()
$197
This Southwest deal was found by Cheapflights users on 8/6. 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.
Tue 9/157:10 am -
2 stops10h 30m
Deal found 8/6![Southwest logo]()
$201
This Kiwi.com deal was found by Cheapflights users on 8/5. 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.
Wed 9/164:27 pm -
2 stops25h 02m
Deal found 8/5![Multiple Airlines logo]()
$204
This Kiwi.com deal was found by Cheapflights users on 8/9. 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.
Thu 10/2911:06 am -
2 stops29h 13m
Deal found 8/9![Multiple Airlines logo]()
$206
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Wed 9/309:45 pm -
2 stops34h 14m
Deal found 8/8![Multiple Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Tue 9/294:27 pm -
2 stops25h 04m
Deal found 8/8![Multiple Airlines logo]()
$214
Find flight deals from Seattle to Louisville
Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Louisville (SDF). 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 August 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $363 (United Airlines) |
One-way from | $150 (Southwest) |
Popular in | April |
Cheapest in | January |
Average price | $459 |
Cheapflights Fare Finder
Customize your flight search to find flights from Seattle to Louisville 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 August 10, 2026.
Use the filters below to find and compare flights from Seattle to Louisville that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Sun 9/6
5:00 am-2:29 pm
1 stop6h 29m
Louisville Intl
Fri 9/11
9:00 am-4:07 pm
1 stop10h 07m
$363
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Thu 9/3
5:00 am-2:29 pm
1 stop6h 29m
Louisville Intl
Sat 9/12
7:25 am-2:52 pm
1 stop10h 27m
$378
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Wed 9/2
5:00 am-2:29 pm
1 stop6h 29m
Louisville Intl
Wed 9/9
5:15 am-11:57 am
2 stops9h 42m
$383
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Mon 9/21
11:59 pm-11:54 am
1 stop8h 55m
Louisville Intl
Tue 9/29
2:47 pm-10:05 pm
1 stop10h 18m
$391
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Thu 9/10
11:05 pm-1:05 pm
2 stops11h 00m
Louisville Intl
Mon 9/14
2:15 pm-6:20 pm
1 stop7h 05m
$396
Quickest round-trip
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Sun 9/6
5:00 am-2:29 pm
1 stop6h 29m
Louisville Intl
Sun 9/13
5:15 am-9:36 am
1 stop7h 21m
$415
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Wed 9/16
11:04 pm-10:18 am
1 stop8h 14m
Louisville Intl
Mon 9/28
5:15 am-9:36 am
1 stop7h 21m
$449
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Sun 9/6
6:35 am-8:30 pm
2 stops10h 55m
Louisville Intl
Fri 9/11
11:05 am-5:00 pm
1 stop8h 55m
$450
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Mon 11/2
10:50 am-8:52 pm
1 stop7h 02m
Louisville Intl
Thu 11/5
9:02 am-3:32 pm
1 stop9h 30m
$467
SeattleLouisville
SEA Seattle/Tacoma Intl - SDF Louisville Intl
SEASDF
Seattle/Tacoma Intl
Tue 10/20
4:35 pm-9:34 am
2 stops13h 59m
Louisville Intl
Sat 10/24
1:50 pm-6:52 pm
1 stop8h 02m
$496
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Seattle to Louisville
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 Seattle to Louisville in August.
| 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 Seattle-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Louisville flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Seattle-Louisville 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 Seattle-Louisville 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 Seattle to Louisville
Have a flexible travel schedule? Discover the best time to fly to Louisville from Seattle with our price prediction graph.
SEA-SDF
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 Seattle to Louisville
Prices
More
How far ahead should I book a flight from Seattle to Louisville?
The price you pay for your flight from Seattle to Louisville may vary depending on when you book. For the best chance of a lower fare, look to book 52 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Seattle to Louisville?
Currently, January is the cheapest month in which you can book a flight from Seattle to Louisville (average of $338). Flying from Seattle to Louisville in April is currently the most expensive (average of $596). 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.
How much does it cost to fly round-trip from Seattle to Louisville?
Airfare is below average for this route at the moment.
Seattle to Louisville flights typically cost between $394 and $510 in November.The cheapest round-trip price found within the last 5 days was $300 on Southwest (Nov 1-Nov 9).
What’s the top layover airport for flights from Seattle to Louisville?
Share of 1-stop round-trip flights from Seattle to Louisville chosen by Cheapflights users in the past 12 months, using the same layover each way.
Chicago (MDW) – chosen by Cheapflights users on 67% of 1-stop itineraries from Seattle to Louisville on Cheapflights.
What’s the cheapest layover airport for flights from Seattle to Louisville?
Average round-trip fare for 1-stop flights from Seattle to Louisville, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Chicago (MDW) is the most affordable 1-stop option, with an average round-trip price of $483.
What’s the fastest layover option from Seattle to Louisville?
Shortest average travel time for 1-stop one-way flights from Seattle to Louisville, 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: 6h 55m.
Which airport typically offers the quickest layover for flights from Seattle to Louisville?
Average layover duration for 1-stop one-way flights from Seattle to Louisville, 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 59m.
Reviews of airlines servicing Louisville
Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated August 10, 2026.
See what other customers who have flown with Southwest,Alaska Airlines, andDelta from Seattle to Louisville have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Entertainment
7.5
Food
7.0
Boarding
8.1
Comfort
8.0
Crew
8.6
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Seattle to Louisville. 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 Louisville?
Book flights to Louisville if you plan to visit one of these locationsCorydon
Shepherdsville
Elizabethtown
Jeffersonville
Bardstown
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Alternative routes for Seattle to Louisville
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Other flights to Louisville
Explore flights to Louisville departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.
Seattle and Louisville flights
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Top 5 airlines flying from Seattle to Louisville
Discover the top 5 airlines that operate flights from Seattle to Louisville. 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 August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$194 | Average$528 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$283 | Average$446 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$300 | Average$483 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$332 | Average$497 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$491 | Average$661 | FlexibilityNo cancel fee | On-time75% |