SEA - SDF

$159 Find Cheap Flights from Seattle to Louisville

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Louisville departing on 10/15. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Louisville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Louisville, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Louisville, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Seattle to Louisville (SEA-SDF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Louisville 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 Seattle to Louisville

Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
9:00 am - 10:56 pmSEA-SDF
10h 56m1 stop
American Airlines Logo
1:02 pm - 11:38 pmSDF-SEA
13h 36m1 stop
$295American Airlines
Find Deal
Tue, Dec 2 - Wed, Dec 10
American Airlines Logo
12:41 am - 1:11 pmSEA-SDF
9h 30m1 stop
American Airlines Logo
1:02 pm - 11:38 pmSDF-SEA
13h 36m1 stop
$306American Airlines
Find Deal
Sun, Nov 9 - Mon, Nov 17
Multiple Airlines Logo
11:43 am - 4:12 pmSEA-SDF
25h 29m1 stop
Multiple Airlines Logo
5:20 pm - 12:13 pmSDF-SEA
21h 53m2 stops
$312Multiple Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
United Airlines Logo
5:05 am - 2:30 pmSEA-SDF
6h 25m1 stop
United Airlines Logo
7:00 am - 3:29 pmSDF-SEA
11h 29m2 stops
$322United Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Multiple Airlines Logo
10:05 pm - 11:45 pmSEA-SDF
22h 40m2 stops
Multiple Airlines Logo
5:20 pm - 1:41 pmSDF-SEA
23h 21m1 stop
$331Multiple Airlines
Find Deal
Tue, Nov 4 - Sat, Nov 8
United Airlines Logo
12:35 pm - 10:29 pmSEA-SDF
6h 54m1 stop
United Airlines Logo
8:00 am - 4:15 pmSDF-SEA
11h 15m2 stops
$339United Airlines
Find Deal
Wed, Dec 3 - Wed, Dec 10
Southwest Logo
10:50 am - 11:45 pmSEA-SDF
9h 55m2 stops
Southwest Logo
6:45 am - 4:30 pmSDF-SEA
12h 45m2 stops
$344Southwest
Find Deal
Sat, Nov 8 - Tue, Nov 11
Southwest Logo
5:45 am - 10:25 pmSEA-SDF
13h 40m2 stops
Southwest Logo
5:50 pm - 10:55 pmSDF-SEA
8h 05m1 stop
$345Southwest
Find Deal
Fri, Oct 17 - Tue, Oct 21
Delta Logo
11:55 pm - 11:56 amSEA-SDF
9h 01m1 stop
Delta Logo
5:58 pm - 11:54 pmSDF-SEA
8h 56m1 stop
$348Delta
Find Deal
Fri, Oct 31 - Sun, Nov 2
Delta Logo
11:55 pm - 11:56 amSEA-SDF
9h 01m1 stop
Delta Logo
7:15 pm - 11:57 pmSDF-SEA
7h 42m1 stop
$402Delta
Find Deal

Everything you should know

Top airlines
American Airlines
Cheapest • from $295 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
August
Cheapest • 15% price drop
November
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$295
Typical prices: $531-773
American Airlines
Wed 12/3Wed 12/10
SEA - SDF • 1 stop
Cheapest one-way
$159
Typical prices: $167-363
American Airlines
Wed 10/15
SEA - SDF • 1 stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Louisville!
Booking Insights

KAYAK's insights & trends for Seattle to Louisville flights

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

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

What’s the cheapest day of the week to fly from Seattle to Louisville?

The average price of all round-trip flights from Seattle to Louisville clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Louisville on a Saturday and more expensive on a Sunday. On your return trip to Seattle, you should consider flying back on a Tuesday, and avoid Thursdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Louisville, 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 Seattle to Louisville is August, where tickets cost $416 (return) on average. On the other hand, the most expensive months are December and February, where the average cost of round-trip tickets is $602 and $538 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Louisville, 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 Seattle to Louisville, you should book around 3 weeks before departure, which saves you about 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$159
Best time to beat the crowds with an average 15% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from Seattle to Louisville

When to book flights from Seattle to Louisville

Are your dates flexible? Find out the best times to travel from Seattle to Louisville 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 Seattle to Louisville

  • What flight options do you have from Seattle to Louisville?

    Southwest Airlines, United Airlines, Alaska Airlines, and American Airlines offer connecting flights between Seattle and Louisville through Chicago. Delta Air Lines and Sun County Airlines have a layover in Minneapolis, while Spirit Airlines is in Las Vegas.

  • Which airline should I fly with young kids?

    Alaska Airlines offers priority boarding for families with young kids, so you can settle in early and stow your belongings. You can also bring onboard an FAA-approved child safety system, such as a car seat. This airline offers child-friendly amenities such as coloring books and in-flight entertainment to entertain your young one throughout the trip.

  • Which airline flying from Seattle to Louisville is ideal to fly economy class with carry-on and checked baggage?

    American Airlines allows you to fly economy class with one carry-on bag, such as a standard backpack, and one personal item, such as a purse or laptop bag. Also, when flying economy class on this airline, you can bring on board checked baggage not weighing more than 50 lbs. for a fee.

  • Which airline is ideal for passengers from Seattle to Louisville with disabilities?

    Delta Air Lines offers pre-boarding for passengers with disabilities, allowing you extra time to settle and receive assistance. You can also bring on board assistive devices such as wheelchairs or medical devices at no cost. Delta Air Lines also has flight attendants trained to aid passengers with disabilities throughout the flight, including meal service and communication support.

  • What is the cheapest flight from Seattle to Louisville?

    In the last 3 days, the lowest price for a flight from Seattle to Louisville was $159 for a one-way ticket and $295 for a round-trip.

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

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Seattle to Louisville?

    On your way to Louisville, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Louisville Intl.

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

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

  • Which airline alliances offer flights from Seattle to Louisville?

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Louisville are Southwest and Alaska Airlines. With an average price for the route of $521 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 $628 and an overall rating of 8.0.

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

    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 Seattle to Louisville.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Louisville from Seattle 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 Seattle to Louisville?

    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 Louisville with an airline and back to Seattle with another airline. Booking your flights between Seattle and SDF 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 Seattle to Louisville?

    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 Louisville from Seattle 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 Seattle to Louisville

  • Seattle-Tacoma International Airport (SEA) will be your departure airport from Seattle to Louisville. This airport is one of the busiest in the United States and is the primary airport serving the Seattle metropolitan area. Seattle-Tacoma International Airport is approximately 14 miles from Downtown Seattle and can conveniently be accessed through Interstate 5.
  • We recommend staying at a hotel near Seattle-Tacoma International Airport if you have an early morning flight to Louisville. Hilton Seattle Airport & Conference Center, DoubleTree by Hilton Hotel Seattle Airport, Crowne Plaza Seattle Airport, Radisson Hotel Seattle Airport, Red Lion Hotel Seattle Airport, and Holiday Inn Express & Suites Seattle Sea-Tac Airport will be your ideal choices. These hotels are near the airport and offer complimentary airport shuttle services.
  • Louisville Muhammad Ali International Airport (SDF) is the primary airport serving Kentucky and the surrounding region. This airport will be your destination airport on your trip from Seattle to Louisville, and you will be approximately 6 miles from Downtown Louisville.
  • Hotels near Louisville Muhammad Ali International Airport will be convenient accommodations when you land late at night in Louisville. Hampton Inn Louisville Airport, Holiday Inn Louisville Airport – Fair/Expo, Crowne Plaza Louisville Airport Expo Center, Courtyard Louisville Airport, Embassy Suites by Hilton Louisville Airport, and Four Points by Sheraton Louisville Airport offer complimentary airport shuttle services, in addition to being close to the airport.
  • Spirit Airlines is an environmentally conscious airline operating flights between Seattle and Louisville. This airline is at the forefront of reducing carbon emissions impact on the aviation industry by investing in sustainable fuel and fuel-efficient aircraft. Also, Spirit Airlines improves its business operations' long-term sustainability by participating in programs and initiatives such as carbon offsetting programs and creating awareness of sustainable aviation practices.

Reviews of the top 5 airlines serving from Seattle to Louisville

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Louisville. 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 Seattle to Louisville? 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
Alaska AirlinesOverall score based on 10000 reviews
7.8Comfort
7.0Entertainment
8.5Crew
8.1Boarding
7.1Food
Airline reviews

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

4.0 OkayKristina, Sep 2025SEA - GTF
Read more Alaska Airlines reviews

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

Slow boarding and the flight crew hit me with the food cart

It was very nice flight going to Seattle and coming back to Omaha. Even got in early. Very easy to check in using the Alaska Airlines App. Thank you.

They offer the only direct flight from Seattle to Pittsburgh.

Seattle airport is a mess. New bag tag system has potential, but you need more signage to guide passengers through the process as to where to go next. Told to go in one direction and then met with a very rude agent when we did. He blamed his attitude on all the folks flying over labor day that were paying his salary. Gate area for D3 is a mess compared to the North terminal. Overall Alaska is number 1 in my book.

After we boarded there was quite a long time before we actually took off, and there were no announcements from crew about why we were delayed. Later when they did make announcements they were largely inaudible. There was no food (other than for purchase) on the flight and no entertainment. Thats not a complaint, just explaining my ratings in those categories. The flight was smooth. Baggage claim was rapid.

The airline staff was great! The best safety review ive ever had!

Agent boarding us in San Diego lectured me on showing up on time for the flight, and said that if I had been three minutes later, he would have denied myself and my wife boarding. Our trusted traveler numbers were not in the system, even though I entered them when I bought the tickets. Our food orders were not in the system, even though I entered them prior to the flight. My wife requires a wheelchair, and that was delayed on both flights.

Why was I charged for a glass of wine on one flight and not on another? Why no movie or TVs? It was a long flight.

I liked that it didn't take 10 hours to drive here. Super short trip!

I wish they had movie screens in the headrests. The seats are much improved, more legroom and recently renovated. Bathroom was clean. Staff was outstanding!!

As always, the entire Southwest experience was wonderful, from online booking to flight to baggage retrieval. Very grateful.

The weather could have been better. There was a 40 minute ATC delay in SFO because of marine fog and a micro cell storm delayed landing and take-off at Nashville. The gate was changed 5 minutes from boarding from gate B3 to gate C23 at Nashville airport.

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Given it’s a red-eye into Charolotte, we didn’t get any food. The survey does not include “N/A” so the rating will be skewed.

Great. Quick and quiet and east. The breakfast choices were a welcome surprise!

American airlines suck they delay the flights all the time made me sleep in an airport because my flight was delayed and I miss my connecting flight

There's nothing I liked about it. For first off I scheduled this trip two weeks in advance then they delayed my flight which messed up my whole trip. So I scheduled it for the following weekend thinking there won't be a delay and guess what as soon as I got to the airport we said in the airplane on the tarmac for an hour and a half. Not only was it delayed I missed my connecting flight meaning I had to stay the night at Dallas-Fort Worth airport sleeping on the floor. I will tell you this I will never fly American airlines ever again I have had nothing but horrible experience with them and I just throw money at them

The stewardess hit me with the food kart twice on the head and didn't say I'm sorry once. The same stewardess gave me a warm Apple Juice with No ice. The Flight was delayed for Departure 6 times, starting from 2:36pm, finally taking off 7:50pm. I was late picking up my child from the sitter by 3 hours.

Having to reschedule flights a day later, they loaded by luggage on the wrong plane from Little rock now I have to HOPE they deliver it to where im staying like they said would. International flight crew was very disgruntled and not very friendly.

We will be writing a long, detailed letter to corporate about our awful experience with American airlines.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

The entertainment package was vast and the selections were very current. Keep updating it was great.

The seat was so hard my tailbone was aching The crew was kind of a b**** because I made a joke that I didn't care if they close the door I total c*** when she was trying to f****** act like she was mad at me because I said that The flight was bumpy. Sure you didnt have control over that.

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

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