SDF - SEA

$163 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 8/20. 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 Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Seattle, 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 Louisville to Seattle, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 22% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Booking Insights
Flights 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

Sat, Aug 30 - Sat, Sep 6
American Airlines Logo
2:49 pm - 11:41 pmSDF-SEA
11h 52m1 stop
American Airlines Logo
6:05 am - 7:24 pmSEA-SDF
10h 19m1 stop
$269American Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
American Airlines Logo
7:00 am - 5:29 pmSDF-SEA
13h 29m1 stop
American Airlines Logo
5:26 am - 5:34 pmSEA-SDF
9h 08m1 stop
$299American Airlines
Find Deal
Sat, Oct 4 - Fri, Oct 10
American Airlines Logo
1:06 pm - 6:28 pmSDF-SEA
8h 22m1 stop
American Airlines Logo
12:34 am - 1:47 pmSEA-SDF
10h 13m1 stop
$300American Airlines
Find Deal
Sat, Oct 4 - Sat, Oct 11
Delta Logo
12:31 pm - 4:29 pmSDF-SEA
6h 58m1 stop
Delta Logo
11:15 pm - 9:50 amSEA-SDF
7h 35m1 stop
$325Delta
Find Deal
Sat, Sep 20 - Fri, Sep 26
American Airlines Logo
7:00 am - 5:29 pmSDF-SEA
13h 29m1 stop
American Airlines Logo
10:09 am - 8:03 pmSEA-SDF
6h 54m1 stop
$326American Airlines
Find Deal
Wed, Sep 17 - Tue, Sep 30
Southwest Logo
5:30 am - 11:15 amSDF-SEA
8h 45m1 stop
Southwest Logo
11:10 pm - 12:35 pmSEA-SDF
10h 25m2 stops
$330Southwest
Find Deal
Mon, Aug 25 - Sat, Sep 6
Delta Logo
6:00 pm - 11:59 pmSDF-SEA
8h 59m1 stop
Delta Logo
11:15 pm - 9:44 amSEA-SDF
7h 29m1 stop
$331Delta
Find Deal
Wed, Sep 17 - Tue, Sep 30
Southwest Logo
3:50 pm - 11:35 pmSDF-SEA
10h 45m2 stops
Southwest Logo
11:10 pm - 12:35 pmSEA-SDF
10h 25m2 stops
$335Southwest
Find Deal
Sat, Oct 4 - Sat, Oct 11
United Airlines Logo
2:03 pm - 8:44 pmSDF-SEA
9h 41m1 stop
United Airlines Logo
7:37 pm - 10:01 amSEA-SDF
11h 24m2 stops
$420United Airlines
Find Deal
Wed, Aug 27 - Tue, Sep 2
United Airlines Logo
9:31 am - 3:52 pmSDF-SEA
9h 21m1 stop
United Airlines Logo
11:54 pm - 10:02 amSEA-SDF
7h 08m1 stop
$421United Airlines
Find Deal
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?

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 $370 (return) on average. On the other hand, the most expensive months are July and June, where the average cost of round-trip tickets is $566 and $524 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 51% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$163
Best time to beat the crowds with an average 15% 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 $163 for a one-way ticket and $269 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?

    Star Alliance, SkyTeam, and oneworld are the airline alliances operating flights between Louisville and Seattle, with SkyTeam 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, Delta or Southwest?

    The two airlines most popular with KAYAK users for flights from Louisville to Seattle are Delta and Southwest. With an average price for the route of $415 and an overall rating of 8.0, Delta is the most popular choice. Southwest is also a great choice for the route, with an average price of $498 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.

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
Alaska AirlinesOverall score based on 10000 reviews
7.8Comfort
8.1Boarding
8.5Crew
7.1Entertainment
7.1Food
Airline reviews

Very nice as always. Not that it’s anyone’s fault really but for some reason the seat (16C) was really hard…. Not typical for your planes… dunno what or why… maybe it was just me ?, The flight was great otherwise

10.0 ExcellentLee, Jul 2025ORD - SEA
Read more Alaska Airlines reviews

Very nice as always. Not that it’s anyone’s fault really but for some reason the seat (16C) was really hard…. Not typical for your planes… dunno what or why… maybe it was just me ?, The flight was great otherwise

My experience was great with Alaska Airlines. They were very helpful when I was checking in. The flight crew was very helpful with our needs.

Crew members were friendly, but I wouldn’t use “entertaining” to describe them. Exact step by step instructions on getting wi-fi on the phone would be helpful.

Ease of reservations, confirmation. Cramped seating, very, very uncomfortable! Claustrophobic.

My husband unfortunately had a very large lady next to him who did not fit in the seat and had to have the armrest up so she was partially in his seat and she also had horrible BO

I liked the legroom even in row 26! I fell asleep immediately and slept the whole flight.

delayed flight 3 hours, then took 45 min to get to gate and another 10 min to open door

The plane was put out of service and had to wait for a new plane to be assigned. No one had any information and the information on the screens was never updated. The call wait time was 2 hours and the estimated time for text assistance was 55 minutes which was a lie because after 55 minutes nothing happened. I understand that delays happen but to not have anyone available to provide any update or reassurance was just negligent. Also, what is the point of having an 800 number if no one answers it and don’t get me started on the text message system. Ridiculous!

Very good; ohana atmosphere and taking care of customer care

Flight was delayed an hour, so that was inconvenient. But they tried to make it up in the air, which I appreciated. Crew was very nice, service was excellent. Description of food didn’t quite match what was served, but it was tasty. 👍🏽

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

The quality of Southwest Airlines continues to degrade each time I fly with them. If it were not for the free luggage, I would probably choose another airline. Their prices are a little bit competitive, but way too high for the quality of the service. Southwest is not unique in this way. Domestic flight in the United States of America has continued to be a lower and lower quality product. Very sad when you compare the quality of domestic airlines to that of many international airlines around the world.

Very smooth checking in our luggage with a super pleasant SW agent. I enjoyed a fun entertaining movie.

WiFi did not work. For as outrageous as these flights cost, when they’re advertised with certain services/ features they should be in working order

Worst experience I had on Southwest. Still better than most, but the seating was barely tolerable.

The Southwest employees (all two of them) were very nice and cheerful despite the fact the line to self-check a bag (simply drop it off) was hundreds of people long. Thank God I arrived early to the airport because I stood in this line for at least an hour. Once on the flight that had been delayed by an hour, we had no Wi-Fi and thus no entertainment. Finally, I hope the investor strong arm tactics against Southwest pay off in a short-term windfall to your C-Suite because the rest of you are screwed. I have been a faithful Southwest customer for 15 years due to everything you just got rid of. I'm flying to Idaho and Washington in October, both places I used to simply book with Southwest without a second thought now with Frontier (Washington) and United (Idaho) because they offer everything the "new" Southwest does but cheaper and at better times, destinations, etc. This really makes me sad...

It was okay. The plane was delayed from earlier in the day, but they kept updating the departure time, sometimes later, sometimes earlier. That was stressful. Once we finally got on and took off, it was fine. I was supposed to have a connection in Chicago to Los Angeles, and the time for so late I was rebooked to arrive in LA 3 hours late. The departure time to Chicago later became early enough to have taken my original connection and arrive earlier but that wasn't an option.

It was one and half hour late... Not sure if any other experience matters.

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.

For my birthday trip this was my second time ever flying, this trip was the best.

Check in process was terrible. Lady at counter didn’t know what she was doing

Delayed and took off even later than the scheduled delay time

For a 69 year old with health problems I had the worse experience, no wheelchair when I entered a lady told me to sit and wait while a gentleman told me I had to walk to the Delta station, which I did. I had a carry on and a bag, and I was traveling with my service dog, which was on his carrier and the lady charged me for my carry on luggage, beside all the waiting cause of the delay, I had to walk to get my luggage cause no wheelchair showed up, I am so disappointed. I will get in touch with the company. I got home at 3:00 am, not good for my health situation.

Great experience on Delta. Staff from baggage check to flight attendants were very courteous and professional. My only issue was a personal preference for pretzels instead of the chips and cookies that were offered.

There was no problems, just a little uncomfortable with seats that do not lay back a little

Always good but we must do something about people in rows ahead of you that don't put their seats back up when they are suppose to. And It's rough to not be able to even lean over to get something out of my purse.

Flight was delayed, 30+ bags had to be gate checked. Crew were very friendly!

Everything was good until we were boarding our connection flight in Atlanta, we were told to gate check our carry-on, but when we got inside the plane, there was plenty of room in the overhead.

Did not know my son and I had different seating arrangements. He was fine, but it was disappointing.

Flight was canceled, and no effort was made to help with rebooking, no hotel vouchers, no car transportation and minimal food voucher and most places for food were closed by the time the voucher was given. Waited for 3 hours for bags. Simply the worst travel experience I have ever had

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

Not a great experience. We paid for the upgrade for premium economy seats and seated ourselves in very comfortable seats. Someone came along with the same seat on their boarding pass. The aircraft had been changed and as a result we were booted out and sent further back to small uncomfortable seats. After complaining we were moved to emergency row seats, which gave us more leg room but the seats don’t recline. For people in our 70’s we found having to sit upright from California to NJ very uncomfortable. Not sure why they chose to move senior citizens instead of the two people that were allowed to take the more comfortable seats. Not happy.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

It was great, I’m very grateful for the pilots and crew flight attendants for everything.

Very poor delay in dfw was really bad n long

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Because of rescheduling, they had to put me on a flight that didn't go through Dallas

It was very difficult to stretch my knee out and I am very short. I also had a torn tendon in my knee which made it extra uncomfortable anyways. My husband is 6'2" and I can't imagine him flying in that plane.

3 hour weather delay followed by 1 hour (and counting) maintenance delay. UGH!

Couldn’t get the door on the plane to close leading to a nearly 2 hour delay. But, hey at least they didn’t cancel the flight.

Flight was cancelled 3 hrs AFTER etd. Thetefore Missed connection from JFK to New Zealand . No accommodation provided… This cost ne aporox 1000 USD in extra expenses and turned whst should have been a 24 hr trip ftom Boston - New Zealand into a VERY expensive , late 70+ hr nightmare … Complete nonsense!!!

After we'd boarded , they canceled the flight. The crew didn't even know , we just all received text messages. Then after they deplaned us , AA was just like "too bad, go F your self, we sure ain't gonna help you"

The flight got delayed 2.5 hrs due to a maintenance issue that cause a domino effect. American should have spare planes for when something like this happens.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

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

Information on your arrival and departure airports

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.