SDF - SEA

$141 Find Cheap Flights from Louisville to Seattle

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 3/31. 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.
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These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Seattle.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Seattle.
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Cheap Flight Deals 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.

Recent round-trip flight deals from Louisville to Seattle

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from Louisville to Seattle.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:16 pm - 7:09 pmSDF-SEA
26h 53m3 stops
8:04 pm - 10:58 pmSEA-SDF
23h 54m3 stops
$204Spirit Airlines
Find Deal
Tue, Mar 18 - Tue, Mar 25
7:16 pm - 7:09 pmSDF-SEA
26h 53m2 stops
8:04 pm - 10:58 pmSEA-SDF
23h 54m3 stops
$225Spirit Airlines
Find Deal
Tue, Mar 18 - Tue, Mar 25
3:25 pm - 8:43 amSDF-SEA
20h 18m2 stops
8:04 pm - 10:58 pmSEA-SDF
23h 54m3 stops
Mon, Mar 24 - Tue, Mar 25
11:50 am - 11:09 pmSDF-SEA
14h 19m1 stop
6:58 am - 5:36 pmSEA-SDF
7h 38m1 stop
$295American Airlines
Find Deal
Sat, Apr 5 - Tue, Apr 8
8:56 am - 5:18 pmSDF-SEA
11h 22m1 stop
10:12 pm - 11:41 amSEA-SDF
10h 29m1 stop
$296American Airlines
Find Deal
Wed, May 7 - Fri, May 9
1:50 pm - 11:01 pmSDF-SEA
12h 11m2 stops
10:55 am - 8:22 pmSEA-SDF
6h 27m1 stop
$303United Airlines
Find Deal
Tue, Mar 18 - Tue, Mar 25
1:19 pm - 6:59 pmSDF-SEA
8h 40m1 stop
10:55 pm - 11:22 amSEA-SDF
9h 27m1 stop
$307Delta
Find Deal
Tue, Mar 18 - Sun, Mar 23
2:00 pm - 9:02 pmSDF-SEA
10h 02m2 stops
8:15 am - 7:47 pmSEA-SDF
8h 32m1 stop
$328United Airlines
Find Deal
Sat, Apr 5 - Tue, Apr 8
4:35 pm - 11:24 pmSDF-SEA
9h 49m1 stop
6:05 am - 5:19 pmSEA-SDF
8h 14m1 stop
$348Delta
Find Deal
Fri, Apr 25 - Tue, Apr 29
4:47 pm - 10:00 pmSDF-SEA
8h 13m1 stop
6:00 am - 3:28 pmSEA-SDF
6h 28m1 stop
$568Alaska Airlines
Find Deal
Mon, Jun 9 - Sat, Jun 14

Flights from Louisville to Seattle - Travel Insights & Trends

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.

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

The average price of all round-trip flights from Louisville to Seattle clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from Louisville to Seattle, look for departures on Tuesdays and avoid leaving on a Thursday, as it's usually the priciest day. When flying back from Seattle, Saturday is the cheapest day to fly and Sunday is the most expensive.

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 October, where tickets cost $376 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $586 and $581 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. For the absolute cheapest price, our data suggests you should book 6 weeks before departure.

Good to know

Low season

January

High season

July

Cheapest flight

$141
Best time to beat the crowds with an average 18% 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 3 days, the lowest price for a flight from Louisville to Seattle was $141 for a one-way ticket and $204 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?

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

  • What is the most popular layover when flying to Seattle from Louisville?

    Chicago is the most popular layover city among KAYAK users traveling from Louisville to Seattle.

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

    The two airlines most popular with KAYAK users for flights from Louisville to Seattle are Southwest and Delta. With an average price for the route of $506 and an overall rating of 8.1, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $499 and an overall rating of 8.0.

  • 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.

See more FAQs

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.
See more tips

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.
8.1
SouthwestOverall score based on 4401 reviews
7.1Food
8.2Boarding
8.1Comfort
7.6Entertainment
8.7Crew
Airline reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

10.0 ExcellentAnonymous, Jan 2025ATL - LGA
Read more Southwest reviews

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Flight was awfully bumpy and landing was a bit jolting. I was in the restroom when snacks and drinks were served and was not asked if i wanted any. I had to ask for water finally.

Wi Fi was horrible kept cutting out the whole time and too expensive

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

Boarding was a little late, but made up for it. It was quick to taxi to the runway, since it's a smallish airport.

Excellent! Only question is how we check in at exactly 24 hours in advance and end up at the end of the B boarding group

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

It was 2 hours 45 minutes late, for no apparently clear reason.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

Staff was great. Flight was cramped, and flight to Spokane was delayed.

Flight was delayed about 45 min and they never offered an explanation. Peruse, staff were friendly and competent and the flight was safe.

No TSA pre check on boarding passes. Was told known traveler numbers are only kept with Alaska Airlines mileage plan members. Did not notice until reached the head of line, and then was sent back through the line to general boarding which took almost an hour. Learned two things: check our boarding passes, which we haven’t had to do with our other airlines, and don’t fly Alaska! You used to be much better!

The would have rated higher, but I asked for a cup of coffee twice and never got one. Later found the crew sitting in the back having a meal and visiting. Just saying.

The flight was canceled so i booked another flight with Delta, so essentially there was absolutely nothing that i enjoyed about my experience with this flight

Probably the worst 1st Class I have ever experienced. Sam, our flight attendant, was excellent. Other than that, everything from the Alaska Longe experience to the buggy app to the uncomfortable flight and uncommunicative agents were poor. The agent who booked us in forgot to mark TSA PreCheck on our boarding passes and we had to go back to get this done. They were a cut below every other airline we have experienced in just about every area.

my first time with Alaska Airlines, an exceptional airline with great employees.

The plane was late arriving at the airport which in turn we left late. I had to literally run to my next gate to catch my connecting flight and my luggage did not show up at my final destination.

Seattle flight to Walla Walla has a confusing doorway system . Small signs once you leave gate area to tarmac. Almost went the wrong way to my plane.

Please don't shrink the seat space any more, as United has done. Thanks for all your good work.

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

This was the second flight this week with flight attendant Marcus I’m not sure if his last name is Lane or Lang but this guy is awesome. He funny, attentive and his service is 5 stars. Marcus makes business travel more enjoyable !

Although the flight left late, we arrived early. It was one of the quickest boarding and off boarding experiences I’ve had. It was kind of annoying the only drinks they had were water, coffee, and tea. The flight was very smooth, temperature was just right, and flight attendants were friendly.

Lower number on this flight so spaced out passengers. Able to enjoy more room to relax during flight. It was lovely.

Kind staff. Snacks are small but that’s the new normal.

The young man who was our flight attendant in first class was lazy and did not do his job well at all. Never offered drinks upon boarding - actually I take that back... said "are you okay with water" as if I do not want to get you anything else, only passed the snacks around once, got my drink order wrong and then never offered a second round of drinks. He was the worst I have ever seen on Delta and we fly a lot.

Great service. Great staff. Boarding was a little slow, but I think there was a service dog slowing things down.

Flight left early and arrived early. the whole trip was excellent.

Seats were really tight and the seat belts did not give enough slack.

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

The tv monitor in front of my seat was not responding. The flight crew reset it and it still didn’t work.

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

Our seats were all the way in back of the plane,

Food choices were very limited. Taste of the dishes was average.

Maybe add a seat trade app for flyers that didn’t get seats together

the pilot that landed this flight in Philadelphia did an amazing job, the weather was absolutely terrible and we landed safely.

I blame kayak for my last trip to dca. Kayak cancelled my direct flight and put on a one stop flight and made lost whole day from my vacation and had not even refunded my ticket.

late again! but its my only option to not take 9 hours to get to Memphis

Per usual, flight status, staff courtesy and professionalism were excellent

The boarding experience was good; $20 for wifi per flight is uncompetitive compared to Delta, Southwest, and others, and puts American lower on my list given similar pricing.

Great experience. Flight boarded easily. Departed early. Smooth flight. Great arrival in DC--almost no taxing! Almost direct to gate from runway. Crew was terrific. Same cookies and beverages in main cabin. I did not use the entertainment system on this flight.

Delays on all NY flights. There was no communication on why but they didn’t say it was weather. Other carriers were not delayed.

The flights were terribly delayed and then cancelled which forced us booking another night at the hotel. Very poor management from American Airlines

Extraordinary service in business class, and very good breakfast and snacks. A really lovely flight.

I flew out of Reagan National. My flight was delayed, delayed, delayed, and then canceled ...THREE TIMES over TWO DAYS. Staff were seemingly not empowered to provide information on why the flights were screwed up. A real nightmare.

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

Information on your arrival and departure airports

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