WAS - SDF

$80 Find Cheap Flights from Washington, D.C. 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 Washington, D.C. to Louisville departing on 1/13. 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

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 Washington, D.C. 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 Washington, D.C. to Louisville, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$176
Overall average: $309
Multiple Airlines
Tue 2/3Fri 2/6
BWI - SDF • 1 stop
Cheapest non-stop
$204
Typical prices: $254-$410
American Airlines
Fri 12/26Thu 1/1
DCA - SDF • Non-stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
Choose Main Cabin Extra on American for early boarding.
United's Economy Plus offers up to six inches more legroom.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
American Airlines
Cheapest • from $204 (round-trip)
Southwest
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
IAD-SDF
Cheapest • 10% average savings
DCA-SDF
Most popular
Insights
Insights
Insights
Insights
When to book
4 weeks
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 31% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 19% price drop
July
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Washington, D.C. to Louisville (WAS-SDF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. 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 Washington, D.C. to Louisville

Tue, Feb 3 - Fri, Feb 6
Multiple Airlines Logo
8:00 am - 1:00 pm
BWI
-
SDF
29h 00m1 stop
Multiple Airlines Logo
1:55 pm - 10:41 pm
SDF
-
BWI
8h 46m1 stop
$176Multiple Airlines
Sun, Feb 1 - Thu, Feb 5
Multiple Airlines Logo
7:52 pm - 10:07 am
BWI
-
SDF
14h 15m1 stop
Multiple Airlines Logo
3:36 pm - 11:59 pm
SDF
-
BWI
8h 23m1 stop
$180Multiple Airlines
Sat, Jan 31 - Thu, Feb 5
Multiple Airlines Logo
9:26 am - 2:41 pm
BWI
-
SDF
29h 15m1 stop
Multiple Airlines Logo
3:36 pm - 11:59 pm
SDF
-
BWI
8h 23m1 stop
$185Multiple Airlines
Fri, Dec 26 - Thu, Jan 1
American Airlines Logo
7:45 pm - 9:33 pm
DCA
-
SDF
1h 48mnonstop
American Airlines Logo
6:03 am - 7:42 am
SDF
-
DCA
1h 39mnonstop
$204American Airlines
Thu, Jan 1 - Mon, Jan 5
American Airlines Logo
7:45 pm - 9:33 pm
DCA
-
SDF
1h 48mnonstop
American Airlines Logo
6:03 am - 7:42 am
SDF
-
DCA
1h 39mnonstop
$205American Airlines
Sat, Jan 31 - Wed, Feb 4
Delta Logo
6:04 am - 10:01 am
DCA
-
SDF
3h 57m1 stop
Delta Logo
3:32 pm - 8:32 pm
SDF
-
DCA
5h 00m1 stop
$209Delta
Sat, Jan 31 - Sat, Feb 7
Delta Logo
12:29 pm - 6:11 pm
IAD
-
SDF
5h 42m1 stop
Delta Logo
10:41 am - 4:46 pm
SDF
-
IAD
6h 05m1 stop
$209Delta
Tue, Feb 3 - Wed, Feb 4
Southwest Logo
1:00 pm - 10:10 pm
DCA
-
SDF
9h 10m2 stops
Southwest Logo
12:50 pm - 8:35 pm
SDF
-
DCA
7h 45m1 stop
$214Southwest
Sat, Jan 31 - Fri, Feb 6
United Airlines Logo
12:50 pm - 2:48 pm
IAD
-
SDF
1h 58mnonstop
United Airlines Logo
2:10 pm - 3:49 pm
SDF
-
IAD
1h 39mnonstop
$249United Airlines
Thu, Jan 1 - Mon, Jan 5
United Airlines Logo
12:51 pm - 2:44 pm
IAD
-
SDF
1h 53mnonstop
United Airlines Logo
2:22 pm - 4:05 pm
SDF
-
IAD
1h 43mnonstop
$250United Airlines
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Louisville flights

Get data-powered insights and trends into flights from Washington, D.C. 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 Washington, D.C. to Louisville?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. to Louisville departing in February.

What is the cheapest Washington, D.C. to Louisville flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest return flight from Washington, D.C. to Louisville costs $189 on the route between Washington, D.C. Dulles Intl Airport (IAD) and Louisville (SDF). Over the past month, this route was, on average, 10% cheaper than other Washington, D.C.-Louisville routes. The most popular route is between Washington, D.C. Reagan-National Airport (DCA) and Louisville (SDF).

What’s the cheapest day of the week to fly from Washington, D.C. to Louisville?

The average price of all round-trip flights from Washington, D.C. 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 Washington, D.C., you should consider flying back on a Friday, and avoid Saturdays for better deals.

What is the cheapest month to fly from Washington, D.C. to Louisville?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. 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 Washington, D.C. to Louisville is January, where tickets cost $259 (return) on average. On the other hand, the most expensive months are March and May, where the average cost of round-trip tickets is $359 and $357 respectively.

Can I save money by flying with a layover from Washington, D.C. to Louisville?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $299 on average.

How far in advance should I book a flight from Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. to Louisville, you should book around 4 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Expert advice

Expert advice for your flight from Washington, D.C. to Louisville

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
American Airlines

Consider Main Cabin Extra for early boarding and complimentary drinks on short flights.


Use Basic Economy for budget travel with carry-on only and no seat assignment until check-in.

United Airlines

Opt for Economy Plus for extra legroom, up to six inches more than standard economy.


Purchase Priority Boarding to avoid gate-checking your carry-on due to overhead bin space.

Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

Good to know

Low seasonFebruary
Cheapest flight$80
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 16% lower on average.
Flight from Baltimore to Louisville

When to book flights from Washington, D.C. to Louisville

Are your dates flexible? Find out the best times to travel from Washington, D.C. 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 Washington, D.C. to Louisville

  • What is the cheapest flight from Washington, D.C. to Louisville?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Louisville was $80 for a one-way ticket and $176 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Louisville?

    No, a passport isn't needed to fly from Washington, D.C. to Louisville. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Washington, D.C. to Louisville?

    Washington, D.C. has 2 major airports: Washington, D.C. Reagan-National and Washington, D.C. Dulles Intl. Louisville Intl is the only airport in Louisville. You’ll usually find the cheapest deals if you fly from Baltimore/Washington Airport.

  • Which airlines offer Wi-Fi service onboard planes from Washington, D.C. to Louisville?

    American Airlines, and Delta offer inflight Wi-Fi service on the Washington, D.C. to Louisville flight route.

  • Which aircraft models fly most regularly from Washington, D.C. to Louisville?

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Washington, D.C. to Louisville flight route.

  • Which airline alliances offer flights from Washington, D.C. to Louisville?

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

  • On which days can I fly direct from Washington, D.C. to Louisville?

    There are nonstop flights from Washington, D.C. to Louisville on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to Louisville, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Louisville are Southwest and Delta. With an average price for the route of $341 and an overall rating of 7.9, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $297 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from Washington, D.C. 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 Washington, D.C. to Louisville.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Louisville?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Louisville from Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. 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 Washington, D.C. 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 Washington, D.C. to Louisville

  • Looking for a cheap flight? 25% of our users found flights on this route for $255 or less one-way and $285 or less round-trip.

Prefer to fly direct from Washington, D.C. to Louisville?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Washington, D.C. to Louisville Intl.
Find which airlines fly direct from Washington, D.C. to Louisville Intl Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. to Louisville Intl

Monday

American Airlines, United Airlines

American Airlines, United Airlines

Tuesday

American Airlines, United Airlines

American Airlines, United Airlines

Wednesday

American Airlines, United Airlines

American Airlines, United Airlines

Thursday

American Airlines, United Airlines

American Airlines, United Airlines

Friday

American Airlines, United Airlines

American Airlines, United Airlines

Saturday

American Airlines, United Airlines

American Airlines, United Airlines

Sunday

American Airlines, United Airlines

American Airlines, United Airlines

See more direct flights

Direct returns

Louisville Intl to Washington, D.C.

Monday

American Airlines, United Airlines

American Airlines, United Airlines

Tuesday

American Airlines, United Airlines

American Airlines, United Airlines

Wednesday

American Airlines, United Airlines

American Airlines, United Airlines

Thursday

American Airlines, United Airlines

American Airlines, United Airlines

Friday

American Airlines, United Airlines

American Airlines, United Airlines

Saturday

American Airlines, United Airlines

American Airlines, United Airlines

Sunday

American Airlines, United Airlines

American Airlines, United Airlines

See more direct flights

Reviews of the top 4 airlines serving from Washington, D.C. to Louisville

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. 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 Washington, D.C. 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.
7.9
SouthwestOverall score based on 4252 reviews
8.0Comfort
8.1Boarding
8.6Crew
7.0Food
7.5Entertainment
Airline reviews

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

8.0 ExcellentRussell, Dec 2025
SAN - OAK
Read more Southwest reviews

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

San Diego airport is brand new, spacious, airy and very smooth checkin at SW baggage drop.

It was rough. The staff was unprofessional, the choice of on board drinks terrible, it was cramped in space at every airport, they always ran out of overhead bin space so they pressured people to check bags for free or we couldn’t leave on the plane— so I did check my bag to help, and they nearly lost my bag. My bag did not arrive on the luggage belt, another man on my flight and I had to waste our time going to the baggage office to search for our bags. I would only fly southwest again if it was my last choice. Also, my flights were consistently delayed over and over again— at one point they straight up told us we were waiting for the pilot to arrive.

Crew could have been friendlier, maybe I'm spoiled by SW crews. In flight wifi was good. Would be nice to have more food offerings on a 4 plus hour flight

Had to get off plane from prior flight even though I had to reboard same plane to continue to my final destination.

Everything a cheap airline should be at normal airline rates.

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

Starlink wifi on the Embraer E175 is an excellent experience. I was able to connect and work from IAD all the way to approach into BTV.

7 hours delayed due to operational issues on United’s end. Basically laziness.

Short flight but an "eager to help" crew made the journey more enjoyable!

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

it was fine, decent flight... dont get food besides cookies or pretzels so not sure why you ask about food. same for entertainment..

I got sick nothing contagious but distressing and the care I received by Kayla? Keighly the flight attendant will be memorable for ever. Thank You

I got sick nothing contagious but distressing enough and the care I received on the flight was astounding.

We were told the flight was delayed 5 times, then it was moved to the next day.

Flight delay was communicated before leaving for airport which caused it to be a non-event. Great flight and crew!

The flight attendant, a black woman with curly hair who sat near Row 21, was wonderful and kind.

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.

We fly American Airlines quite a bit. And we always fly business class when traveling internationally. We were a bit disappointed with the comfort of this particular plane as well as the entertainment options.

The AA staff person who checked our bags was curt and almost rude. The FA also seemed unhappy doing her job. Overall it was like riding the school bus back in grade school.

My Internet did not work for Outlook email or basically anything. I paid for one hour of in-flight usage and it was terrible. I spent a lot of time on different sites and browsers with no luck and a lot of frustration. Other than that, the flight was on time, crew was nice, service was fine. Seat was OK even though I paid for the extra 6 inches. I cannot imagine how tight the seats in the back must be.

Everything you need to know for your flight from Washington, D.C. to Louisville

Information on your arrival and departure airports