WAS - SDF

$82 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 12/4. 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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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$195
Overall average: $309
Multiple Airlines
Fri 2/6Mon 2/9
BWI - SDF • 1 stop
Cheapest non-stop
$222
Typical prices: $219-$466
American Airlines
Thu 11/27Thu 12/4
DCA - SDF • Non-stop
Our travelers' advice
AI-generated summary based on content written by travel experts
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
Spirit Airlines
Cheapest • from $208 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
IAD-SDF
Cheapest • 13% 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 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 18% 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

Fri, Feb 6 - Mon, Feb 9
Multiple Airlines Logo
8:42 am - 11:45 pmBWI-SDF
15h 03m1 stop
Multiple Airlines Logo
6:00 am - 8:16 pmSDF-BWI
14h 16m1 stop
$195Multiple Airlines
Find Deal
Thu, Nov 13 - Mon, Nov 17
Multiple Airlines Logo
9:36 pm - 6:16 pmBWI-SDF
20h 40m1 stop
Multiple Airlines Logo
7:46 pm - 3:47 pmSDF-BWI
20h 01m1 stop
$197Multiple Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
American Airlines Logo
8:31 am - 10:38 amDCA-SDF
2h 07mnonstop
American Airlines Logo
6:08 am - 7:49 amSDF-DCA
1h 41mnonstop
$222American Airlines
Find Deal
Fri, Dec 26 - Thu, Jan 1
American Airlines Logo
7:45 pm - 9:33 pmDCA-SDF
1h 48mnonstop
American Airlines Logo
6:03 am - 7:42 amSDF-DCA
1h 39mnonstop
$223American Airlines
Find Deal
Wed, Dec 10 - Wed, Dec 17
Southwest Logo
12:40 pm - 4:35 pmBWI-SDF
3h 55m1 stop
Southwest Logo
3:20 pm - 4:55 pmSDF-BWI
1h 35mnonstop
$224Southwest
Find Deal
Sat, Nov 15 - Sat, Nov 22
Delta Logo
6:06 am - 9:59 amDCA-SDF
3h 53m1 stop
Delta Logo
2:10 pm - 8:41 pmSDF-DCA
6h 31m1 stop
$224Delta
Find Deal
Sat, Nov 15 - Sat, Nov 22
Delta Logo
5:59 pm - 12:06 amIAD-SDF
6h 07m1 stop
Delta Logo
6:11 pm - 11:19 pmSDF-IAD
5h 08m1 stop
$224Delta
Find Deal
Tue, Dec 9 - Thu, Dec 11
Southwest Logo
11:25 am - 1:15 pmBWI-SDF
1h 50mnonstop
Southwest Logo
5:30 am - 7:05 amSDF-BWI
1h 35mnonstop
$227Southwest
Find Deal
Wed, Nov 26 - Fri, Nov 28
United Airlines Logo
5:30 pm - 7:27 pmIAD-SDF
1h 57mnonstop
United Airlines Logo
9:55 am - 11:33 amSDF-IAD
1h 38mnonstop
$234United Airlines
Find Deal
Fri, Nov 21 - Sat, Nov 29
United Airlines Logo
5:30 pm - 7:27 pmIAD-SDF
1h 57mnonstop
United Airlines Logo
9:55 am - 11:33 amSDF-IAD
1h 38mnonstop
$235United Airlines
Find Deal
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, 13% 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 Tuesdays 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 April and May, where the average cost of round-trip tickets is $354 and $353 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 32% 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

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
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$82
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 15% 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 $82 for a one-way ticket and $195 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 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $288 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 $225 or less one-way and $287 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.
8.0
SouthwestOverall score based on 4241 reviews
8.0Comfort
7.5Entertainment
8.6Crew
8.1Boarding
7.0Food
Airline reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

8.0 ExcellentGreg, Oct 2025OAK - BUR
Read more Southwest reviews

Ever since Southwest starting charging for bags, passengers don't want to pay to check their bags, so the gate agents have to beg people to check their roller bags now because there's "not enough space". This was a terrible business move by Southwest.

Full cans of soda would be nice. A choice between two snacks would be appreciated.

Tried watching free movie and it kept freezing so I couldn’t finish.

All was good. I just had a hard time getting connected to the WiFi/internet during the flight

Sacrament staff are always polite and helpful. Airport is easy to maneuver and boarding is straightforward.

Great flight. Outstanding Service. Southwest was able to put us on a direct flight to Denver when the connection could have been affected by a later arrival to Baltimore. The direct flight was less expensive that the flight with the connection in Baltimore.

Delays delays delays. Late taking off, late landing, wait for a gate, etc.

Boarded on time but once we were ready for take off, the crew determined that, although every seat was taken, somehow someone was on the wrong flight. Delay, delay delay, announcements and ended up with one person checking EVERY ID against their passenger Manifest only to figure out it was a "clerical error." We departed 54 minutes late causing me to run in the St. Louis Airport to make my connection and lose the priority boarding spot I had paid for. Unnecessary delay.

I was re-booked onto another flight because my original flight was delayed and I would have missed my connector. I ended up in the “C” group after paying extra to be in the “A “ group on the original flight. At least if you’re going to re-book people, re-book them into the same group.

Flight was delayed due to plane not passing inspection And one of the crew had to time out and we had to wait for another one A 3 hour delay

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They ended up paying for the bag twice, but the counter wouldn't take my baggage receipt. Left it to me to resolve. Not sure how to resolve the issue.

The customer service before board was very rude and when I expressed my concerns about making the connecting flight she laughed and told me I bought the wrong ticket. I explained once it showed the flight was delayed it no longer let me change seats or anything. I was trying to upgrade to make sure I would get to the next gate on time.

Non stop on long haul is the way to go. Great experience

The flight used a B767 with a very old interior from before 2014. The entertainment system did not work at all during the flight despite attempts to reset the system. It was like they flew this route just to be competitive.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight was too crowded and seats are too small, especially since passengrs are getting larger. Having a middle seat is ALWAYS tough! Woman on my left was large & kept creeping in to my space. Flight personnel were great! Have more savory rather than sweet snacks please.

Flight was crowded and the woman sitting on my left was large & kept crouching in to my space. You need bigger seats or smaller passengers to fit into the seats you DO have! Snack were OK. Would appreciate if airlines had more savory rather than sweet snacks, thank you!

Delayed flight (1hour) plus a long layover after an overnight flight with no backup plane available.

We were delayed, which I think had to do with air traffic control. Otherwise, everything was great.

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

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

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

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

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

It was good..clean, comfy seat. Friendly warm welcoming crew. Was able to check my cabin luggage at the gate which I was able to pickup in a decent time from baggage claim. The app gave all updates from delays to baggage claim info. Overall smooth flight.

Flight was delayed leaving Dallas. Arrived about 2 hours later than scheduled.

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.

They are still charging me after taking 466 and 833 for round trip from AR to to Bradley airport from 19 to 21. Then poor experience. Am hurt and I will say it on social media. Please stay away from this airline. I see in my bank account they are still taking 644. Am trying to stop it. I used to fly United airlines and I suggest that if you don't want extra charges and good service you go back there. American airlines delayed my flight again and I was late for my meeting, no recompensation but charging me over and over.

They changed our Gate 5 times, and concourse twice. Changed our seats twice.

Pitch was very small. Knees were on the seat back in front of me.

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

Information on your arrival and departure airports

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