WAS - SDF

$68 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 1/3. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from 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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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

Sat, Nov 1 - Mon, Nov 3
American Airlines Logo
11:50 am - 4:08 pmBWI-SDF
4h 18m1 stop
American Airlines Logo
7:13 pm - 11:35 pmSDF-BWI
4h 22m1 stop
$159American Airlines
Find Deal
Thu, Oct 23 - Wed, Oct 29
Delta Logo
7:45 pm - 12:01 amBWI-SDF
4h 16m1 stop
Delta Logo
12:54 pm - 5:17 pmSDF-BWI
4h 23m1 stop
$177Delta
Find Deal
Wed, Nov 12 - Mon, Nov 17
United Airlines Logo
12:50 pm - 2:45 pmIAD-SDF
1h 55mnonstop
United Airlines Logo
2:35 pm - 4:11 pmSDF-IAD
1h 36mnonstop
$194United Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29
United Airlines Logo
5:20 pm - 10:30 pmBWI-SDF
5h 10m1 stop
United Airlines Logo
11:00 am - 5:14 pmSDF-BWI
6h 14m1 stop
$195United Airlines
Find Deal
Thu, Oct 23 - Tue, Oct 28
Southwest Logo
6:00 am - 12:05 pmDCA-SDF
6h 05m1 stop
Southwest Logo
6:25 am - 10:00 amSDF-DCA
3h 35m1 stop
$198Southwest
Find Deal
Tue, Oct 14 - Wed, Oct 15
Southwest Logo
7:30 am - 4:20 pmDCA-SDF
8h 50m2 stops
Southwest Logo
1:00 pm - 7:10 pmSDF-DCA
6h 10m1 stop
$202Southwest
Find Deal
Thu, Dec 11 - Fri, Dec 12
 Logo
3:01 pm - 11:45 pmBWI-SDF
8h 44m1 stop
 Logo
10:55 am - 7:17 pmSDF-BWI
8h 22m1 stop
Sat, Oct 25 - Sun, Oct 26
Spirit Airlines Logo
6:56 am - 6:03 pmBWI-SDF
11h 07m1 stop
Spirit Airlines Logo
6:58 pm - 11:54 amSDF-BWI
16h 56m1 stop
$209Spirit Airlines
Find Deal
Fri, Oct 24 - Sun, Oct 26
Spirit Airlines Logo
4:31 pm - 10:47 pmBWI-SDF
6h 16m1 stop
Spirit Airlines Logo
7:15 am - 12:40 pmSDF-BWI
5h 25m1 stop
$216Spirit Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
 Logo
3:01 pm - 11:45 pmBWI-SDF
8h 44m1 stop
 Logo
10:55 am - 11:54 pmSDF-BWI
12h 59m1 stop

Everything you should know

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
American Airlines
Cheapest • from $159 (round-trip)
Southwest
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
IAD-SDF
Cheapest • 6% average savings
DCA-SDF
Most popular
Insights
Insights
Insights
Insights
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
January
Cheapest • 18% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$159
Overall average: $310
American Airlines
Sat 11/1Mon 11/3
BWI - SDF • 1 stop
Cheapest non-stop
$194
Typical prices: $269-403
United Airlines
Wed 11/12Mon 11/17
IAD - SDF • Non-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Louisville!
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
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?

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 $166 on the route between Washington, D.C. Dulles Intl Airport (IAD) and Louisville (SDF). Over the past month, this route was, on average, 6% 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 October and April, where the average cost of round-trip tickets is $354 and $352 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 $272 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 2 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$68
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly with an average 12% increase in price.
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 $68 for a one-way ticket and $159 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?

    oneworld, and Star Alliance are the airline alliances operating flights between Washington, D.C. and Louisville, with Star Alliance 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 $333 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 $278 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 $187 or less one-way and $246 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 4242 reviews
8.6Crew
8.0Comfort
7.5Entertainment
8.1Boarding
7.0Food
Airline reviews

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

10.0 ExcellentG, Sep 2025LAS - ATL
Read more Southwest reviews

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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.

Wonderful as usual except for other guests that were unruly and not kept in check by the Crew.

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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