$150+ 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 6/3. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — SEA
Jun 10 — Jun 171
Round-trip
1 adult, Economy
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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
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Best
Last-minute
One-way
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 May 11, 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 May 11, 2026.
This Southwest deal was found by Cheapflights users on 5/5. 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.
Tue 9/14:00 pm
SDF
- SEA
1 stop7h 25m
Southwest
Tue 9/811:05 pm
SEA
- SDF
1 stop9h 10m
Southwest
Deal found 5/5![Southwest logo]()
$395
This Southwest deal was found by Cheapflights users on 5/8. 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.
Mon 8/247:10 pm
SDF
- SEA
1 stop7h 20m
Southwest
Tue 8/257:10 am
SEA
- SDF
1 stop7h 45m
Southwest
Deal found 5/8![Southwest logo]()
$397
This American Airlines deal was found by Cheapflights users on 5/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/57:19 pm
SDF
- SEA
1 stop7h 40m
American Airlines
Sat 9/126:24 am
SEA
- SDF
1 stop7h 45m
American Airlines
Deal found 5/6![American Airlines logo]()
$399
This Southwest deal was found by Cheapflights users on 5/6. 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 8/114:00 pm
SDF
- SEA
1 stop7h 25m
Southwest
Sat 8/155:30 am
SEA
- SDF
1 stop11h 25m
Southwest
Deal found 5/6![Southwest logo]()
$402
This Delta deal was found by Cheapflights users on 5/8. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/223:24 pm
SDF
- SEA
1 stop8h 14m
Delta
Thu 10/811:53 pm
SEA
- SDF
1 stop7h 24m
Delta
Deal found 5/8![Delta logo]()
$407
This Delta deal was found by Cheapflights users on 5/9. 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.
Tue 7/77:49 pm
SDF
- SEA
1 stop7h 09m
Delta
Thu 7/169:45 am
SEA
- SDF
1 stop8h 27m
Delta
Deal found 5/9![Delta logo]()
$408
This Southwest deal was found by Cheapflights users on 5/10. 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 9/173:05 pm
SDF
- SEA
2 stops12h 15m
Southwest
Wed 9/2311:05 pm
SEA
- SDF
1 stop8h 20m
Southwest
Deal found 5/10![Southwest logo]()
$413
This American Airlines deal was found by Cheapflights users on 5/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:18 pm
SDF
- SEA
1 stop8h 23m
American Airlines
Tue 6/167:31 am
SEA
- SDF
1 stop8h 29m
American Airlines
Deal found 5/6![American Airlines logo]()
$417
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:11 am
SDF
- SEA
1 stop10h 05m
American Airlines
Mon 6/811:58 pm
SEA
- SDF
1 stop7h 37m
American Airlines
Deal found 5/8![American Airlines logo]()
$423
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 May 11, 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 May 11, 2026.
This Southwest deal was found by Cheapflights users on 5/10. 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 9/158:45 am
SDF
- SEA
1 stop7h 20m
Southwest
Sun 9/2011:05 pm
SEA
- SDF
1 stop8h 20m
Southwest
Deal found 5/10![Southwest logo]()
$426
This Delta deal was found by Cheapflights users on 5/10. 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 6/124:40 pm
SDF
- SEA
1 stop10h 19m
Delta
Tue 6/165:30 am
SEA
- SDF
1 stop8h 16m
Delta
Deal found 5/10![Delta logo]()
$456
This American Airlines deal was found by Cheapflights users on 5/10. 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.
Fri 6/56:02 pm
SDF
- SEA
1 stop8h 42m
American Airlines
Mon 6/811:58 pm
SEA
- SDF
1 stop7h 37m
American Airlines
Deal found 5/10![American Airlines logo]()
$469
This Southwest deal was found by Cheapflights users on 5/6. 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 8/1111:50 am
SDF
- SEA
2 stops11h 25m
Southwest
Sat 8/155:00 am
SEA
- SDF
2 stops9h 25m
Southwest
Deal found 5/6![Southwest logo]()
$436
This Southwest deal was found by Cheapflights users on 5/7. 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.
Fri 8/282:15 pm
SDF
- SEA
2 stops9h 30m
Southwest
Mon 8/3111:05 pm
SEA
- SDF
2 stops10h 35m
Southwest
Deal found 5/7![Southwest logo]()
$438
This Southwest deal was found by Cheapflights users on 5/9. 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.
Sat 10/312:55 pm
SDF
- SEA
1 stop6h 45m
Southwest
Fri 10/98:00 pm
SEA
- SDF
2 stops11h 35m
Southwest
Deal found 5/9![Southwest logo]()
$444
This Southwest deal was found by Cheapflights users on 5/7. 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.
Wed 6/105:25 pm
SDF
- SEA
2 stops9h 55m
Southwest
Fri 6/1211:05 pm
SEA
- SDF
1 stop7h 55m
Southwest
Deal found 5/7![Southwest logo]()
$462
This Southwest deal was found by Cheapflights users on 5/7. 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.
Fri 6/53:35 pm
SDF
- SEA
2 stops11h 15m
Southwest
Tue 6/99:30 am
SEA
- SDF
2 stops7h 55m
Southwest
Deal found 5/7![Southwest logo]()
$466
This Southwest deal was found by Cheapflights users on 5/10. 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 6/23:30 pm
SDF
- SEA
2 stops11h 05m
Southwest
Mon 6/811:05 pm
SEA
- SDF
1 stop8h 00m
Southwest
Deal found 5/10![Southwest logo]()
$471
Last-minute flights from Louisville to SeattleDiscover last-minute flight deals from Louisville to Seattle. Data last updated May 11, 2026 and is based on user searches.
Discover last-minute flight deals from Louisville to Seattle. Data last updated May 11, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 5/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:56 pm
SDF
- SEA
1 stop8h 20m
American Airlines
Wed 6/310:23 am
SEA
- SDF
1 stop9h 56m
American Airlines
Deal found 5/6![American Airlines logo]()
$395
This American Airlines deal was found by Cheapflights users on 5/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:56 pm
SDF
- SEA
1 stop8h 20m
American Airlines
Mon 6/111:58 pm
SEA
- SDF
1 stop7h 19m
American Airlines
Deal found 5/6![American Airlines logo]()
$397
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/279:21 am
SDF
- SEA
1 stop12h 14m
Multiple Airlines
Mon 6/17:50 pm
SEA
- SDF
2 stops33h 46m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$427
This United Airlines deal was found by Cheapflights users on 5/9. 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.
Wed 5/277:10 am
SDF
- SEA
1 stop7h 28m
United Airlines
Mon 6/111:49 pm
SEA
- SDF
1 stop9h 05m
United Airlines
Deal found 5/9![United Airlines logo]()
$439
This United Airlines deal was found by Cheapflights users on 5/6. 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 5/283:25 pm
SDF
- SEA
1 stop8h 45m
United Airlines
Sat 5/308:00 am
SEA
- SDF
1 stop8h 18m
United Airlines
Deal found 5/6![United Airlines logo]()
$399
This American Airlines deal was found by Cheapflights users on 5/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:51 pm
SDF
- SEA
1 stop8h 42m
American Airlines
Mon 6/811:58 pm
SEA
- SDF
1 stop7h 37m
American Airlines
Deal found 5/9![American Airlines logo]()
$408
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/37:11 am
SDF
- SEA
1 stop10h 05m
American Airlines
Mon 6/811:58 pm
SEA
- SDF
1 stop7h 37m
American Airlines
Deal found 5/8![American Airlines logo]()
$423
This Southwest deal was found by Cheapflights users on 5/8. 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.
Mon 6/88:05 pm
SDF
- SEA
1 stop7h 25m
Southwest
Tue 6/99:30 am
SEA
- SDF
2 stops7h 55m
Southwest
Deal found 5/8![Southwest logo]()
$431
This American Airlines deal was found by Cheapflights users on 5/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/97:18 pm
SDF
- SEA
1 stop8h 23m
American Airlines
Tue 6/167:31 am
SEA
- SDF
1 stop8h 29m
American Airlines
Deal found 5/6![American Airlines logo]()
$417
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 May 11, 2026.
Search for one-way flight options from Louisville to Seattle. Find affordable one-way fares based on user searches. Data last updated May 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/38:06 pm
SDF
- SEA
2 stops41h 00m
Multiple Airlines
Deal found 5/7![Multiple Airlines logo]()
$150
This Delta deal was found by Cheapflights users on 5/9. 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.
Wed 6/245:59 pm
SDF
- SEA
1 stop6h 56m
Delta
Deal found 5/9![Delta logo]()
$198
This American Airlines deal was found by Cheapflights users on 5/8. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:18 pm
SDF
- SEA
1 stop8h 23m
American Airlines
Deal found 5/8![American Airlines logo]()
$200
This Southwest deal was found by Cheapflights users on 5/10. 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 7/284:15 pm
SDF
- SEA
2 stops10h 15m
Southwest
Deal found 5/10![Southwest logo]()
$203
This American Airlines deal was found by Cheapflights users on 5/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/87:18 pm
SDF
- SEA
1 stop8h 23m
American Airlines
Deal found 5/9![American Airlines logo]()
$211
This Kiwi.com deal was found by Cheapflights users on 5/10. 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.
Sat 8/19:03 pm
SDF
- SEA
2 stops39h 46m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$219
This American Airlines deal was found by Cheapflights users on 5/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/276:56 pm
SDF
- SEA
1 stop8h 20m
American Airlines
Deal found 5/9![American Airlines logo]()
$229
This United Airlines deal was found by Cheapflights users on 5/10. 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 6/31:05 pm
SDF
- SEA
1 stop9h 31m
United Airlines
Deal found 5/10![United Airlines logo]()
$232
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Mon 6/89:10 pm
SDF
- SEA
3 stops40h 25m
Multiple Airlines
Deal found 5/9![Multiple Airlines logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 5/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/118:06 pm
SDF
- SEA
3 stops45h 13m
Multiple Airlines
Deal found 5/6![Multiple Airlines logo]()
$238
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 May 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $395 (United Airlines) |
One-way from | $150 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $462 |
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 May 11, 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
Cheapest round-trip
Quickest round-trip
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Tue 9/15
8:45 am-1:05 pm
1 stop7h 20m
Seattle/Tacoma Intl
Sun 9/20
11:05 pm-10:25 am
1 stop8h 20m
$426
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Tue 8/11
11:50 am-8:15 pm
2 stops11h 25m
Seattle/Tacoma Intl
Sat 8/15
5:00 am-5:25 pm
2 stops9h 25m
$436
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Fri 8/28
2:15 pm-8:45 pm
2 stops9h 30m
Seattle/Tacoma Intl
Mon 8/31
11:05 pm-12:40 pm
2 stops10h 35m
$438
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Sat 10/3
12:55 pm-4:40 pm
1 stop6h 45m
Seattle/Tacoma Intl
Fri 10/9
8:00 pm-10:35 am
2 stops11h 35m
$444
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Fri 6/12
4:40 pm-11:59 pm
1 stop10h 19m
Seattle/Tacoma Intl
Tue 6/16
5:30 am-4:46 pm
1 stop8h 16m
$456
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Wed 6/10
5:25 pm-12:20 am
2 stops9h 55m
Seattle/Tacoma Intl
Fri 6/12
11:05 pm-10:00 am
1 stop7h 55m
$462
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Fri 6/5
3:35 pm-11:50 pm
2 stops11h 15m
Seattle/Tacoma Intl
Tue 6/9
9:30 am-8:25 pm
2 stops7h 55m
$466
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Fri 6/5
6:02 pm-11:44 pm
1 stop8h 42m
Seattle/Tacoma Intl
Mon 6/8
11:58 pm-10:35 am
1 stop7h 37m
$469
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Tue 6/2
3:30 pm-11:35 pm
2 stops11h 05m
Seattle/Tacoma Intl
Mon 6/8
11:05 pm-10:05 am
1 stop8h 00m
$471
Cheapest one-way
LouisvilleSeattle
SDF - SEA
SDFSEA
Louisville Intl
Tue 7/21
7:10 pm-12:52 am
1 stop8h 42m
$198
Showing 1-10 of 20 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 May.
| 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
Prices
More
How far ahead should I book a flight from Louisville to Seattle?
The best time to book flights from Louisville to Seattle is 88 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 $268). Flying from Louisville to Seattle in June is currently the most expensive (average of $556). 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 Louisville to Seattle?
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 75% 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 $378.
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 1h 19m.
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 May 11, 2026.
Peruse reviews from past customers who have flown with Southwest,Alaska Airlines, andDelta 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.
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Crew
8.6
Boarding
8.1
Overall
8.0
Comfort
8.0
Entertainment
7.5
Food
7.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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 locationsSeaTac
Tacoma
Ocean Shores
Olympia
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Marysville
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Louisville and Seattle flights
Browse other Louisville and Seattle flight options. Last updated on May 11, 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 May 11, 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 May 11, 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 May 11, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$206 | Average$411 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$264 | Average$482 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$270 | Average$435 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$342 | Average$487 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$358 | Average$577 | FlexibilityNo cancel fee | On-time75% |