SDF - SEA

$181 Find Cheap Flights from Louisville to Seattle - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Seattle departing on 8/27. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$355
Typical prices: $386-$561
Southwest
Thu 9/10Mon 9/14
SDF - SEA • 1 stop
Cheapest one-way
$181
Typical prices: $258-$303
American Airlines
Thu 8/27
SDF - SEA • 1 stop
Top airlines
Cheapest • from $355 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Louisville and Seattle. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $370 (round-trip)
Shortest trip • 7h 14m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 43% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 33% price drop
Most popular
Good to know
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+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Louisville to Seattle (SDF-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Seattle

Thu, Sep 10 - Mon, Sep 14
Southwest Logo
7:10 pm - 11:55 pm
SDF
-
SEA
7h 45m
1 stop
Southwest Logo
11:05 pm - 11:15 am
SEA
-
SDF
9h 10m
1 stop
$355Southwest
Wed, Aug 26 - Tue, Sep 1
American Airlines Logo
6:30 pm - 11:59 pm
SDF
-
SEA
8h 29m
1 stop
American Airlines Logo
5:00 am - 4:59 pm
SEA
-
SDF
8h 59m
1 stop
$355American Airlines
Thu, Sep 10 - Mon, Sep 14
Southwest Logo
7:10 pm - 11:55 pm
SDF
-
SEA
7h 45m
1 stop
Southwest Logo
11:05 pm - 12:10 pm
SEA
-
SDF
10h 05m
2 stops
$360Southwest
Mon, Aug 24 - Mon, Aug 31
United Airlines Logo
5:45 pm - 10:43 pm
SDF
-
SEA
7h 58m
1 stop
United Airlines Logo
5:00 am - 2:29 pm
SEA
-
SDF
6h 29m
1 stop
$363United Airlines
Wed, Sep 9 - Mon, Sep 14
United Airlines Logo
10:05 am - 3:43 pm
SDF
-
SEA
8h 38m
1 stop
United Airlines Logo
11:00 pm - 9:54 am
SEA
-
SDF
7h 54m
1 stop
$363United Airlines
Mon, Aug 31 - Thu, Sep 10
Delta Logo
5:25 pm - 10:05 pm
SDF
-
SEA
7h 40m
1 stop
Delta Logo
10:59 pm - 10:19 am
SEA
-
SDF
8h 20m
1 stop
$363Delta
Wed, Aug 26 - Thu, Aug 27
Delta Logo
7:55 am - 2:34 pm
SDF
-
SEA
9h 39m
1 stop
Delta Logo
11:10 pm - 9:54 am
SEA
-
SDF
7h 44m
1 stop
$363Delta
Thu, Aug 27 - Mon, Aug 31
American Airlines Logo
7:30 pm - 12:50 am
SDF
-
SEA
8h 20m
1 stop
American Airlines Logo
11:56 pm - 10:35 am
SEA
-
SDF
7h 39m
1 stop
$363American Airlines
Sat, Aug 8 - Sat, Aug 15
Multiple Airlines Logo
9:21 am - 5:51 pm
SDF
-
SEA
11h 30m
1 stop
Multiple Airlines Logo
7:06 pm - 10:32 am
SEA
-
SDF
12h 26m
2 stops
$584Multiple Airlines
Sat, Aug 8 - Fri, Aug 14
Multiple Airlines Logo
9:21 am - 5:51 pm
SDF
-
SEA
11h 30m
1 stop
Multiple Airlines Logo
7:06 pm - 8:06 pm
SEA
-
SDF
22h 00m
2 stops
$587Multiple Airlines
Booking Insights

KAYAK's insights & trends for Louisville to Seattle flights

Get data-powered insights and trends into flights from Louisville to Seattle to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Louisville to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Louisville to Seattle departing in August.

Flight prices are below average for this route right now.

Flights to Seattle from Louisville usually cost between $445 and $543 in August.
The lowest price found in the past 5 days was $355 on American Airlines (Aug 26-Sep 1).

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Louisville to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Louisville to Seattle is January, where tickets cost $299 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $588 and $568 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Louisville to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Louisville to Seattle, you should book around 4 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low season

January

Cheapest flight

$181
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly with an average 26% increase in price.
Flight from Louisville to Seattle

When to book flights from Louisville to Seattle

Are your dates flexible? Find out the best times to travel from Louisville to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Louisville to Seattle

  • How do I get to downtown Seattle from Seattle–Tacoma International Airport (SEA)?

    SEA is connected to downtown Seattle via the LINK Light Rail system at the Airport Parking Garage, Level 4, which operates every 6 to 15 minutes on weekdays and 10 to 15 minutes on weekends and holidays. The ride to downtown Seattle takes around 40 minutes. You can also take the King County Metro buses, which connect the airport to downtown Seattle. Other options include the Sound Transit express buses, taxis, car rentals, ridesharing, and hotel shuttles.

  • Which airlines offer an unaccompanied minor service on flights from Louisville to Seattle?

    American Airlines, United Airlines, and Delta Airlines offer an unaccompanied minor service for children flying alone from Louisville to Seattle. This service is mandatory for children aged 8 to 14 and optional for children aged 15 to 17 on all airlines. Children below 8 are only allowed to travel alone on direct flights. Your child will be escorted and receive necessary help throughout the flight.

  • What assistance does Louisville Muhammad Ali International Airport (SDF) offer travelers with limited mobility?

    Travelers with special needs or reduced mobility flying through Louisville Muhammad Ali International Airport (SDF) can access several services and amenities, including accessible parking, wheelchair assistance, accessible restrooms, specially-designed ramps, elevators, and the GoodMaps program to enable travelers with low vision to move through the terminal safely. For wheelchair assistance, contact your airline when making your reservation.

  • Are there hotels near Seattle–Tacoma International Airport (SEA)?

    For hotels close to Seattle–Tacoma International Airport (SEA), you can check into Hilton Seattle Airport & Conference Center, Radisson Hotel Seattle Airport, Crowne Plaza Seattle Airport, Red Roof Inn Seattle Airport SEATAC, La Quinta Inn & Suites Seattle SeaTac Airport, Red Lion Hotel Seattle Airport, which offer a free shuttle from the airport.

  • What is the cheapest flight from Louisville to Seattle?

    In the last 5 days, the lowest price for a flight from Louisville to Seattle was $178 for a one-way ticket and $355 for a round-trip.

  • Do I need a passport to fly between Louisville and Seattle?

    No

  • Which aircraft models fly most regularly from Louisville to Seattle?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Louisville to Seattle?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between Louisville and Seattle, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Louisville to Seattle, Southwest or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from Louisville to Seattle are Southwest and Alaska Airlines. With an average price for the route of $510 and an overall rating of 8.0, Southwest is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $767 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Louisville to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Louisville to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Louisville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Louisville to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Louisville with another airline. Booking your flights between Louisville and SEA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Louisville to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Louisville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Louisville to Seattle

  • The Louisville (SDF) to Seattle (SEA) route is mainly served by one-stop flights. Common layover cities for one-stop flights on this route include Chicago (ORD), Las Vegas (LAS), Dallas (DFW), Detroit (DTW), Denver (DEN), Minneapolis (MSP), Charlotte (CLT), Los Angeles (LAX), Houston (IAD), and Atlanta (ATL). The layover city depends on the flight route.
  • For Business Class flights from Louisville to Seattle, consider booking American Airlines, United Airlines, or Delta Airlines, which offer this travel option on some of their connecting flights on this route. General Business Class benefits and amenities these airlines offer include spacious cabins with comfortable seats, special baggage allowance, premium dining, priority check-in and boarding, in-flight entertainment, and access to specific lounges.
  • American Airlines, United Airlines, Spirit Airlines, and Delta Airlines have no maximum weight limit for carry-on bags on flights from Louisville to Seattle. However, your carry-on bag and personal item shouldn’t exceed the required dimensions and perfectly fit in the overhead compartment and underneath the seat in front of you.
  • If you’re mindful of the environment, you can book Spirit Airlines, American Airlines, United Airlines, Alaska Airlines, or United Airlines, which have reduced carbon emissions on their flights from Louisville to Seattle.
  • From Seattle, you can fly to other cities within the U.S., like Los Angeles, San Francisco, Dallas, Houston, Phoenix, Chicago, New York City, Las Vegas, and Denver, or international destinations like London, Vancouver, Toronto, Tokyo, Dubai, Seoul, Beijing, Amsterdam, Frankfurt, and Mexico City.

Reviews of the top 5 airlines serving from Louisville to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Louisville to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Louisville to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4227 reviews
7.0Food
8.0Comfort
8.1Boarding
7.5Entertainment
8.6Crew
Airline reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

8.0 ExcellentSean, Jul 2026
HOU - LGB
Read more Southwest reviews

No wifi, seems to be very common with Southwest currently. Everything else was normal.

Poor customer service, no accommodation for passengers when the flight was delayed over 5 hours.

Paid for premium extra leg room but the bin space for rows 1-3 had to go in rows 4-6 and 4-6 had to go to 7-9 because flight attendants have snacks and their luggage upfront. So we pay extra to have to fight thru traffic to get our bags. Only 2nd day of new seating so hope they fix this.

Delayed flight. Nicest crew member was a SW pilot flying seated next to me who kindly move to seat the final passenger. Flight extra delayed. My cup of refreshment of ginger ale was so packed with ice it was literally 2 sips.

Southwest is Southwest. No frills. If you're luck enough to get a happy crew (we did), then it makes for a nicer flight.

I would have liked to arrive on time - not 5 hours late!

Board Milian spokesman with pre boarding , not after A group and without my spouse. Total BS, back to Alaska Airlibes I GO. oner 1.2M miles and 900 flights, and every time I fly SWA I regret it, thos will be last time, I only flew SWA but to time requirements fir a Funeral. NEVER AGAIN SWA

Good crew, funny movies, but you need phone ports in the plane and better snacks. :)

Had a long layover in rainy Chicago. The staff were attentive - my husband needed a wheelchair due to a recent fall and unsteady on his feet. They are wonderful for those of us who need a bit of extra care. My only complaint was discovered upon unpacking our suitcases at home. One (we had 3 carry on size and one just a bit larger) had water damage to everything inside. All the clothing (just happened to be the case with the clean clothes) were wet. I know it was raining, but why would items inside be wet? The paperwork packed in this case was damp with ink running. There were momentos from our 10-day European vacation that I was hoping to scrapbook - but alas, they will be scrapped - too damaged to keep. The boxes of French chocolate were damp on the outside. My expensive camera now has a cracked screen and a Gaudi tea-for-one was cracked - even though it was packed in clothing. I know it happened on this flight as I repacked all four suitcases before leaving New York in the morning. My first unhappy experience with luggage at Southwest.

The a/c wasn’t working very well and it was a very hot flight

Flight canceled. Had to fly in the evening out of lax instead of 10am out of Burbank

The airline asked for volunteers to check carry ons. I figured I would to make catching my connecting flight on a short layover a little easier. They then lost my bag on the layover. Getting it back was relatively painless, but I'm still not thrilled about it. The first flight also got in fifteen minutes late, changing a 45 minute layover to a 30 minute one. And my second flight took its sweet time after starting the taxi, resulting in the flight being delayed for half an hour. Not a huge deal in the grand scheme, but a little frustrating and especially so when they ended up losing my bags.

I would love it if Alaska Airlines brought back the complimentary beverage service on short flights

the flight was fine, But I paid extra for an Aisle seat both planes and did not get what I paid for when you pay an extra almost $80 and do not get the desired seats it was frustrating I don't fly much because of my legs need more room. thank you for your attention to this

I had called before the flight for vegetarian food. But they did not have it for me.

The plane was very full, and the seats are not very spacious. I was in the middle seat, so it was not super comfortable. I didn't have any experience with the entertainment on board. And food was a Biscoff. Which I realize is just how we do it now, but I definitely miss the days when you could get a breakfast included.

I always have flown Alaska Airlines because I never had an issues. Their customers service is incredible and an amazing communication.

Someone had peed in my seat in the flight before hand. We were rushing to board and fly because our flight was delayed due to a medical emergency on the flight prior in our airplane. My seatbelt was soaked. My seat was dry, but the floor was also wet. It was strange. It smelled awful! I had to be moved and my kids had to sit away from me.

Had nothing to do with alaska just the passenger next to me on the first flight needed a second seat to fit. He was a big boy who couldn't stay in his own space.

Everything was great. Due to an accident on the Glen Hwy attendants could not make it to the airport. A delay while new crew was located

Not really a “Delta” problem but worth mentioning: Boarding was a difficult process. TSA seemed understaffed and Pre-Check took longer than regular TSA. The supervisor was frazzled and yelled at travelers. Once through TSA, we had to put our carry-ons through another x-ray machine. Then queue up to board with both boarding pass and ID. Then, when we got to the stairs on the tarmac, we had to show our boarding pass again. Maybe this is just normal for Kona since the terminal is outdoors (but still a “secured” area).

Checkin was good, fllight ws good. Onlly complaint is lack of foot on 6 hour flight from Seattle to Boston. Snacks were flimsy - chips and cookies. could have offered something more substantial for such a long flight. I know you can buy food in airport but for the price you pay for a ticket, they should step up for the passengers.

Flight was delayed, we could have been notified earlier and in a consistent manner. App was not refreshing for another passenger to get the latest flight status. We could have stayed and waited at the hotel instead of waiting at the airport had we known the flight was going to delayed for more than 5 hours. The toilet is too tight, and needs to be cleaned more frequently (every hour). The entertainment screen froze, the touch screen not responding to touch. We were upgraded to comfort, it is more comfortable than regular economy seats.

It was fine. 55 minute flight. No snacks or beverage service offered. Boarding went smoothly and my walker was waiting for me on the jet way.

My flight was cencaled due with the bad weather on Sunday the crew was poorly mistaken my luggage supposed depart with my flight instead I didn’t have my luggage for almost 3 days the website is poorly respond to my complain until I have someone to do it my connection smooth their not even respon or email me even the have my luggage

8 hours late and the plane smelled like urine, that smell in the morning when your child wet the bed in the night.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

Prior to takeoff, the pilot told us there was a possibility of not being able to land and going to Portland. Well that happened, we took off and then did 8 loops around Spokane before the pilot told us we ran out of fuel and had to go to Portland. So for a 35 minute flight we have now been on the plane for 3 hours (boarded at 6:50 am and landed in Portland at 10:30). Then, we just sat in Portland's airport with no updates of when we can start heading back. All of a sudden, our pilots and crew just left, leaving us stranded in a different city and state. We continued to sit in Portland until we finally got a new crew assigned and boarded the plane (This was from 10:30-2). We then sat on the plane for an additional hour before take off because they had to count us multiple times. We finally landed in Spokane at 3:55 PM. So a flight that should have taken at max an hour took us 10 hours and we missed the majority of the recruiting event we went for.

Staff was great! Kind and cordial! Middle seat row 28 seat B has a hump in it. Trays were getting stuck when putting down and up. Good flight

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Smooth and easy boarding, comfortable for the entire 5 hour flight, and the seat back entertainment was great! I appreciated all the features, from location info and maps, movies, the ability to connect with Bluetooth headphones, and good selection of movies. Food was good, normal airline snacks (I didn’t purchase anything)

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

leg space better than expected. two washrooms for one plane isn't enough.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

Everything was fantastic. Modern plane. All the amenities! Although the paid snacks and meals are pure robbery. Like i understand airlines need to make money, but 11$ USD for an overnight oats with some nuts in it and barely any pieces of apple.... Highway robbery

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

Our flight was delayed many times throughout the day. The final delay was about 8 hours. I spent time in line to speak to someone at their understaffed desk, and also spent time waiting online and then chatting with a service rep. None of the United employees were any help at all. I desperately wanted to go get rest and possibly re-book my trip but I was denied any compensation or voucher for a hotel. I was repeatedly told it was not United's fault and therefore they had no compensation to offer. Overall, a cold and callous experience.

Flight crew and pilots did great. Flight way delayed due to a part needing replacement. Based on what the pilot indicated- the maintenance crew could’ve resolved this more efficiently than replacing whole part- and taken less time

The most cramped seating I’ve ever experienced, (including budget airlines) with no food available for purchase on a nearly 6 hour flight.

Plane was super cold. No entertainment unless you were with mileage program Getting off the plane was super slow

Beverage service was not good. Also just one service in 5 hr 30 min flight. No ask fir water ir anything beside one time beverage service.

Flight was delayed because of a bird strike. They had another plane available within 45 minutes.

It was a code share with Alaska - would have been great if I actually made it on the plane, claimed I didn’t have a ticket or a seat even thought I was checked in.

The main problem was delay. The plane was at the gate early and bags were loaded. However, there was no crew for the flight. They were inbound from LGA and had to land and make their way to our gate. It took more than 40 minutes. Then, once the crew arrived and boarded, one of the crew members had to deplane and then a replacement crew member had to be found. It took another 40 minutes or so to get the final crew member. In all, we took off about 2 hours later than our scheduled departure time. Once in the air, the flight was great. Smooth most of the way. The crew was professional and efficient.

i suspect i caught flu on this flight as i could hear someone coughing a few rows back and ended up with flu a few days later. also tiresome to have to watch movies on my device by holding up smartphone screen, would have liked to have in seat display.

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

Terrible flight seats where really uncomfortable I had body aches for 2 days and flight was delays almost two hours

Very smooth for one of the busiest travel days of the year and the crew was great.

Boarded late. Missed first landing attempt, landed almost an hour late and missed connecting flight.

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

Information on your arrival and departure airports