WAS - SDF

$86 Find Cheap Flights from Washington, D.C. to Louisville - Compare and Save

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 9/17. 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

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Everything you should know

Cheapest round-trip
$171
Typical prices: $298-$444
Southwest
Thu 8/20Mon 8/24
BWI - SDF • Non-stop
Cheapest one-way
$86
Typical prices: $278-$366
Southwest
Thu 9/17
BWI - SDF • Non-stop
Top airlines
Cheapest • from $171 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
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Airline reviews
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Nonstop flights
You can fly direct with American Airlines and United Airlines. Average duration is 1h 47m
Direct flights
Direct flights
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Direct flights
Direct flights
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Top routes
Cheapest • 6% average savings
Most popular
Insights
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When to book
in advance
Our data shows that travelers who book at least 6 weeks in advance save around 43% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
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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

Thu, Aug 20 - Mon, Aug 24
Southwest Logo
1:50 pm - 3:30 pm
BWI
-
SDF
1h 40mnonstop
Southwest Logo
11:50 am - 1:30 pm
SDF
-
BWI
1h 40mnonstop
$171Southwest
Mon, Sep 14 - Wed, Sep 16
Southwest Logo
8:15 am - 10:00 am
BWI
-
SDF
1h 45mnonstop
Southwest Logo
5:00 pm - 6:40 pm
SDF
-
BWI
1h 40mnonstop
$171Southwest
Thu, Sep 3 - Mon, Sep 7
American Airlines Logo
7:24 pm - 11:11 pm
BWI
-
SDF
3h 47m
1 stop
American Airlines Logo
7:12 pm - 10:58 pm
SDF
-
BWI
3h 46m
1 stop
$191American Airlines
Tue, Oct 6 - Tue, Oct 13
American Airlines Logo
11:34 am - 6:04 pm
BWI
-
SDF
6h 30m
1 stop
American Airlines Logo
7:08 pm - 11:02 pm
SDF
-
BWI
3h 54m
1 stop
$191American Airlines
Mon, Sep 14 - Wed, Sep 16
Delta Logo
6:35 pm - 11:59 pm
BWI
-
SDF
5h 24m
1 stop
Delta Logo
7:05 am - 12:56 pm
SDF
-
BWI
5h 51m
1 stop
$191Delta
Wed, Nov 11 - Sat, Nov 14
Delta Logo
6:00 am - 9:59 am
BWI
-
SDF
3h 59m
1 stop
Delta Logo
5:40 pm - 9:31 pm
SDF
-
BWI
3h 51m
1 stop
$191Delta
Thu, Aug 20 - Sun, Aug 23
United Airlines Logo
8:35 am - 10:18 am
IAD
-
SDF
1h 43mnonstop
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
$235United Airlines
Thu, Aug 20 - Sun, Aug 23
United Airlines Logo
5:25 pm - 7:15 pm
IAD
-
SDF
1h 50mnonstop
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
$235United Airlines
Sun, Aug 30 - Sun, Sep 6
Multiple Airlines Logo
6:09 pm - 10:29 am
IAD
-
SDF
16h 20m
1 stop
Multiple Airlines Logo
6:55 pm - 4:13 pm
SDF
-
IAD
21h 18m
2 stops
$251Multiple Airlines
Mon, Sep 7 - Mon, Sep 14
Multiple Airlines Logo
6:45 am - 10:11 am
BWI
-
SDF
51h 26m
2 stops
Multiple Airlines Logo
11:15 am - 1:00 pm
SDF
-
BWI
25h 45m
1 stop
$253Multiple 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.

Flight prices are below average for this route right now.

Flights to Louisville from Washington, D.C. usually cost between $234 and $309 in August.
The lowest price found in the past 5 days was $171 on Southwest (Aug 20-Aug 24).

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 $191 on the route between Washington, D.C. Reagan-National Airport (DCA) 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. Dulles Intl Airport (IAD) 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 Mondays 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 $277 (return) on average. On the other hand, the most expensive months are April and March, where the average cost of round-trip tickets is $395 and $389 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 $358 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 6 weeks before departure, which saves you about 43% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 21 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 season

January

Cheapest flight

$86
Best time to beat the crowds with an average 12% drop 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 5 days, the lowest price for a flight from Washington, D.C. to Louisville was $86 for a one-way ticket and $171 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 $374 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 $358 and an overall rating of 7.8.

  • 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 $278 or less one-way and $260 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 4229 reviews
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
Airline reviews

Eveeyrime I fly they are begging for bags due to cabin overhead space. What they should so ia take the bags that are clearly too big to fit wheels first on their side. And those of us who give up the bag should really get their bags first. When boarding, nobody wants stupid jokes about how hot it is on board. Give us some cool air. Im usually sick from the heat by the time we take off.

6.0 GoodVera, Jul 2026
MCO - BNA
Read more Southwest reviews

Eveeyrime I fly they are begging for bags due to cabin overhead space. What they should so ia take the bags that are clearly too big to fit wheels first on their side. And those of us who give up the bag should really get their bags first. When boarding, nobody wants stupid jokes about how hot it is on board. Give us some cool air. Im usually sick from the heat by the time we take off.

No wifi, seems to be very common with Southwest currently. Everything else was normal.

Poor customer service, no accommodation for passengers when the flight was delayed over 5 hours.

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

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

The seats were a bit cramped and worn, but otherwise okay.

Pretty standard flight. We left late, but arrived early. The wifi entertainment is always nice. The free snacks and beverages are simple, but appreciated. I'm tall and the seats are an issue. I can deal with a short flight, but any longer, I have to find another airline where I know beforehand I have extra legroom.

Since the flight wasn’t full, we had some extra room. Crew was great

Awesome experience. No in-flight video or meal. Still do not like the boarding process.

On time, good crew, easy flight. Just like the old days!

Flight was delayed for about an hour but overall good experience

The gentleman at the gate I think his name is RIE was exceptional

This flight was no comparison to our prior flight. I'm thinking it all has to do with the age of the aircraft.

2 of the seats in row 31 the entertainment system was not working, and one seat the tray table did not go all the way down. Flight arrived early and departed on time which was great.

Waited at the usual crowded gate at DCA where one ends up standing up because there aren't enough seats.

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!!

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Inexpensive, got an exit row aisle aeat with no middle passenger, bought a great breakfast sandwich, flight comfortable & arrived ahead of schedule.

I wouldn't say I liked being forced to check my small roller bag at the gate; too many people had bags and were in a higher boarding group.

715PM departure was 2.5 hours late. Received hotel & food voucher but after we already booked a room. Entire team just seemed like they were 2-3 steps behind in execution, and notifcations.

My flight was delayed so bad i missed u it so i just said never mind

Delayed 2 hours while stuck on the aircraft. If the luggage was properly loaded the first time we probably wouldn’t have been delayed at all

Onboard staff was courteous, helpful, responsive and friendly. The boarding process was disorganized, poorly communicated, and disheveled. Gate agents were yelling instead of using the PA system, didn’t communicate the timing delay of our flight, and created an atmosphere of chaos rather than order and communication. As far as I know, there was no reason for their. I would hate to see how it operated under extreme conditions. I’ve never seen United Airlines operations in such a state.

The flight did not have its customary snacks during the flight. Apparently they were never loaded on the plane.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Over 5 hour delay with minimal updates or ability to standby for alternative flights. During boarding and 1 hr+ wait for takeoff, seats were drenched w water from air conditioning condensation and always leftover crumbs on carpet and seats

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.

Short flight, but no drink/snack service. The flights both going and coming were delayed.

Disorganized boarding. Mandatory to gate check bags. Curt flight staff. No space for cabin bag, even when I was in first class.

Patrons with larger bags were asked to check the bags when boarding. Seems like the most effective, and least costly way, way to successfully use the cramped space.

They cancelled our flight two times after rebooking us for a later flight. We never got on the plane. We found another solution by driving.

Mostly great. Only issue was with the WiFi. Halfway through the flight it was spotty and I was unable to work as I planned. This impacted my work products as I am traveling for business and it was an unexpected hindrance which was inconvenient. Flight here was amazing. For a 5 hour flight something more than a Biscoff would be nice but I’m just swinging at windmills I guess…

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

It was an older plane. First Class was not especially roomy or comfortable. It was a short flight so there were no meal but they did offer mixed nuts which used to be normal but now is rare. Crew member was very polite and professional.

No Snacks or Entertainment. The flight was short, snacks should still be given.

Everything was fine. Flight boarded and departed on time. Seating was spacious enough for my carryon to fit under the seat in front of me. No complaints at all. Flight even arrived early.

Boston ticket agent Cheryl Porter is WONDERFUL. Our Iberia flight to Barcelona was cancelled the morning we were scheduled to leave and Cheryl was our super hero - she found us seats on a flight to London and on to Barcelona. Truly a “can-do” attitude which we appreciated so much after the Iberia ticket agents told us there was “absolutely nothing they could do”. (As did the customer service agents at Iberia’s call center) Ms Porter is truly a wonderful person who genuinely cares about travelers!

Nothing wrong on this flight but nothing special. It was oversold and they had to bump people which is always bad.

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

Information on your arrival and departure airports