WAS - SDF

$88 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 9/2. 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
$200
Typical prices: $385-$240
Multiple Airlines
Wed 8/26Mon 8/31
BWI - SDF • 1 stop
Cheapest non-stop
$227
Typical prices: $615-$369
Southwest
Tue 6/30Tue 6/30
BWI - SDF • Non-stop
Top airlines
Cheapest • from $227 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with American Airlines and United Airlines. Average duration is 1h 49m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top routes
Cheapest • 14% average savings
Most popular
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $263 (round-trip)
Shortest trip • 3h 50m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 38% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 50% price drop
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

Wed, Aug 26 - Mon, Aug 31
Multiple Airlines Logo
10:34 am - 10:32 am
BWI
-
SDF
23h 58m
1 stop
Multiple Airlines Logo
7:43 pm - 9:39 am
SDF
-
BWI
13h 56m
1 stop
$200Multiple Airlines
Thu, Aug 27 - Mon, Aug 31
Multiple Airlines Logo
1:10 pm - 9:49 am
BWI
-
SDF
20h 39m
1 stop
Multiple Airlines Logo
7:43 pm - 9:39 am
SDF
-
BWI
13h 56m
1 stop
$214Multiple Airlines
Tue, Jun 30 - Tue, Jun 30
Southwest Logo
10:40 am - 12:25 pm
BWI
-
SDF
1h 45mnonstop
Southwest Logo
4:15 pm - 5:55 pm
SDF
-
BWI
1h 40mnonstop
$227Southwest
Mon, Aug 10 - Wed, Aug 12
Southwest Logo
8:55 pm - 10:35 pm
BWI
-
SDF
1h 40mnonstop
Southwest Logo
5:30 am - 7:05 am
SDF
-
BWI
1h 35mnonstop
$232Southwest
Thu, Jun 25 - Tue, Jun 30
Delta Logo
6:00 am - 10:32 am
DCA
-
SDF
4h 32m
1 stop
Delta Logo
8:10 am - 2:59 pm
SDF
-
DCA
6h 49m
1 stop
$258Delta
Tue, Jun 30 - Sat, Jul 4
Delta Logo
6:00 am - 10:32 am
IAD
-
SDF
4h 32m
1 stop
Delta Logo
7:55 am - 11:54 am
SDF
-
IAD
3h 59m
1 stop
$258Delta
Fri, Aug 28 - Tue, Sep 1
American Airlines Logo
8:41 am - 10:40 am
DCA
-
SDF
1h 59mnonstop
American Airlines Logo
6:08 am - 7:57 am
SDF
-
DCA
1h 49mnonstop
$259American Airlines
Wed, Jul 1 - Fri, Jul 3
United Airlines Logo
12:48 pm - 2:37 pm
IAD
-
SDF
1h 49mnonstop
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
$259United Airlines
Thu, Jun 25 - Mon, Jun 29
American Airlines Logo
7:34 am - 9:41 am
DCA
-
SDF
2h 07mnonstop
American Airlines Logo
8:08 pm - 11:54 pm
SDF
-
DCA
3h 46m
1 stop
$260American Airlines
Fri, Jul 24 - Sun, Jul 26
United Airlines Logo
5:25 pm - 7:18 pm
IAD
-
SDF
1h 53mnonstop
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
$261United 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 August.

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 $228 on the route between Washington, D.C. Dulles Intl Airport (IAD) and Louisville (SDF). Over the past month, this route was, on average, 14% 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 Monday. 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 August, where tickets cost $81 (return) on average. On the other hand, the most expensive months are May and March, where the average cost of round-trip tickets is $205 and $189 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 $335 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 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 17 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.
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on American Airlines

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.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

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.

Good to know

Low seasonJanuary
Cheapest flight$88
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 13% 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 5 days, the lowest price for a flight from Washington, D.C. to Louisville was $88 for a one-way ticket and $200 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, Delta, and JetBlue 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 $372 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 $311 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 $247 or less one-way and $314 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 4251 reviews
8.6Crew
8.1Boarding
7.0Food
7.5Entertainment
8.0Comfort
Airline reviews

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

10.0 ExcellentAnonymous, Jun 2026
OKC - LAS
Read more Southwest reviews

there were two flight attendants that were up front...that were the best! They get KUDOs for making my trip only fantastic. Tell them Jeff said that!

OKay. I sat in the back of the plane and it was really loud between babies and little kids, and adults who.like to talk a lot and loudly most of the flight.

Flight coming out of Buffalo was delayed, so we had to be rescheduled on another flight from Baltimore to Phoenix which means we had a long layover and got home 3.5 hours late. Shuttle to parking stopped at 10pm, so we had to pay for an Uber to the parking lot and got charged an extra day of parking since it was after midnight. Not the best experience. Long day!

Was fine, delayed and feels like southwest is always late

I don't know why flying out of Sarasota requires two plane changes.

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

Long story short, it was one of the better flight experiences I've had in some time when compared with other airlines.

Flight was great! This flight from Atlanta was even better than when I paid for Comfort from SNA to Atlanta.

Connection flights should be spaced out farther because too close I missed my connection.

Definitely a southern flavor. Cordiality was evident even though no drinks or snacks were served.

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

Left /arrived on time. Decent seat space. Like the wifi/plugs and entertainment. Windows and tray table were kinda gross. Attendants didn't start snack service til 40mins before landing. Two rows before us, captain came on to say there's turbulence and recalled staff to seats. So, no drink/snack. Later, attendants didn't stop to see if we had trash nor even look our way. Felt invisible! Almost all pilot announcements were not only unintelligible, but so quiet. We had no idea what she said.

Average seat comfort, a drink and chips were provided, early boarding because we checked a carryon at the gate was nice. Ticket pricing shenanigans, including fees to pick a seat, check a bag, and get food onboard - evidence the industry is reinvigorating last century’s strategies- destroys the experience before one ever arrives at the airport. It’s difficult to recognize any value or sustain loyalty in the end-to-end process making air travel more drudgery than pleasure.

Gate agent was unhelpful for handicapped boarding. Flight attendant seemed untrained.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

Clean planes and not take my comfort class seat away.

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

After arriving in Chicago, we were taxiing for 1.5 hours with infrequent and untruthful updates about the amount of time it would take to arrive at the gate. Minimally, the team could have provided timing expectations that were more truthful, especially one their original expectations were not met.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

As always, most AA flights that we fly are almost ALWAYS delayed and that too multiple times. Very frustrating

The small flights with Valet Luggage has a poor service

Overall a good experience, however Wifi was not working on the flight.

THe flight was an hour late. You got us on the plan and we sat on the ground for 45 minutes with no information from the pilot whatsoever. Worst flight this year.

Going non stop to lax like I paid for. Not stopping in MCI for gas. Too long of delays

Human interaction. Thought there would be more service-even a smile would have been nice.

Incoming flight was delayed, delaying boarding. It then took 30 mins to take off. Took 20 mins to get to a gate because they changed the gate last minute, crew weren’t ready so there was no one staffed to work the jet bridge. Boarding was so disorganized as is usual with American because everyone just stands around the gate regardless of boarding group.

Delays with no explanation. It could have been handled better.

The gate got changed several times and the flight was delayed over an hour. Awful experience

Flight delay for mechanical. Inbound arrived on time. No one said why mechanical delay.

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

Information on your arrival and departure airports