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Washington, D.C.

$75+ Cheap flights from Louisville (SDF) to Washington, D.C. (WAS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — WAS
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Find cheap flights from Louisville to Washington, D.C. with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Louisville Intl to Washington, D.C. are usually found in November or June, booked 41 days in advance, depart on a Friday or Thursday and return on a Saturday

Cheap flight deals from Louisville to Washington, D.C.

Cheapest flights from Louisville to Washington, D.C.
Explore the most affordable flight options available from Louisville to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/319:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Sat 1/312:51 pmIAD - SDF
Nonstop1h 53mUnited Airlines
Deal found 12/17$219
This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/249:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Wed 12/3112:51 pmIAD - SDF
Nonstop1h 53mUnited Airlines
Deal found 12/16$232
This United Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/299:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Fri 1/25:15 pmIAD - SDF
Nonstop1h 56mUnited Airlines
Deal found 12/16$249
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:49 pmSDF - DCA
1 stop6h 07mDelta
Tue 12/306:49 pmDCA - SDF
1 stop5h 07mDelta
Deal found 12/16$252
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/244:49 pmSDF - IAD
1 stop6h 03mDelta
Wed 12/316:00 amIAD - SDF
1 stop7h 12mDelta
Deal found 12/16$252
This American Airlines deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1611:10 amSDF - DCA
Nonstop1h 44mAmerican Airlines
Sat 1/108:26 amDCA - SDF
Nonstop2h 12mAmerican Airlines
Deal found 12/16$254
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/209:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Wed 1/215:45 pmIAD - SDF
Nonstop1h 58mUnited Airlines
Deal found 12/17$254
This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/297:24 pmSDF - DCA
1 stop4h 24mAmerican Airlines
Fri 1/27:45 pmDCA - SDF
Nonstop1h 48mAmerican Airlines
Deal found 12/17$259
This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:03 amSDF - DCA
Nonstop1h 39mAmerican Airlines
Fri 12/267:45 pmDCA - SDF
Nonstop1h 48mAmerican Airlines
Deal found 12/17$262
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/242:22 pmSDF - IAD
Nonstop1h 43mUnited Airlines
Fri 12/265:15 pmIAD - SDF
Nonstop1h 56mUnited Airlines
Deal found 12/15$262
This American Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/308:05 amSDF - DCA
1 stop6h 18mAmerican Airlines
Fri 1/27:45 pmDCA - SDF
Nonstop1h 48mAmerican Airlines
Deal found 12/17$265
This Delta deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:06 pmSDF - DCA
1 stop4h 44mDelta
Thu 1/15:35 pmDCA - SDF
1 stop5h 23mDelta
Deal found 12/16$269

Find flight deals from Louisville to Washington, D.C.

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 18, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$174
(Kiwi.com)

One-way from

$75
(Mytrip)

Popular in

January

Cheapest in

November

Average price

$259

Good round-trip deal

$228 or less

Good one-way deal

$165 or less
Provider with most accurate pricing for Louisville Intl-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Washington, D.C. (WAS) flights.
Search Deals
From Louisville Intl to Washington, D.C. (WAS)
Search Deals
One-way flight from Louisville Intl to Washington, D.C. (WAS)
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($5 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Louisville Intl to Washington, D.C. (WAS).
Search Deals
Price to beat on a one-way flight from Louisville Intl to Washington, D.C. (WAS).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Louisville to Washington, D.C. that are best for you.

Fly from

Louisville

Fly to

Washington, D.C.

Route

Depart

Return

Price

LouisvilleBaltimore

SDF - BWI

SDFBWI

Louisville Intl

Wed 1/21

1:55 pm-12:27 pm

1 stop22h 32m

Baltimore/Washington

Sat 1/24

1:00 pm-2:41 pm

1 stop25h 41m

$174

LouisvilleBaltimore

SDF - BWI

SDFBWI

Louisville Intl

Tue 1/13

3:36 pm-10:36 pm

2 stops31h 00m

Baltimore/Washington

Tue 1/20

8:00 am-1:00 pm

1 stop29h 00m

$183

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Thu 2/19

3:33 pm-8:32 pm

1 stop4h 59m

Washington, D.C. Reagan-National

Sat 2/21

7:00 am-1:52 pm

1 stop6h 52m

$209

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Tue 1/13

6:45 am-1:00 pm

1 stop6h 15m

Washington, D.C. Reagan-National

Tue 1/13

3:25 pm-10:10 pm

1 stop6h 45m

$209

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Sun 1/18

3:37 pm-7:32 pm

1 stop3h 55m

Washington, D.C. Reagan-National

Sat 1/24

6:04 am-10:01 am

1 stop3h 57m

$209

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Wed 1/21

5:00 pm-9:23 pm

1 stop4h 23m

Washington, D.C. Reagan-National

Sat 1/24

6:04 am-10:01 am

1 stop3h 57m

$209

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Sat 1/24

7:40 am-12:40 pm

1 stop5h 00m

Washington, D.C. Reagan-National

Sun 1/25

1:45 pm-9:05 pm

1 stop7h 20m

$209

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Wed 1/21

12:25 pm-6:50 pm

1 stop6h 25m

Washington, D.C. Reagan-National

Sun 1/25

8:00 am-2:36 pm

1 stop6h 36m

$209

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Sat 1/17

10:30 am-3:00 pm

1 stop4h 30m

Washington, D.C. Reagan-National

Mon 1/19

1:45 pm-9:05 pm

1 stop7h 20m

$209

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Fri 2/27

6:33 pm-10:57 pm

1 stop4h 24m

Washington, D.C. Reagan-National

Sun 3/1

6:05 am-10:04 am

1 stop3h 59m

$209

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 59 results
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Compare providers for flights from Louisville to Washington, D.C.

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Louisville to Washington, D.C. in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Louisville-Washington, D.C. flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Louisville-Washington, D.C. flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Louisville-Washington, D.C. flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-Washington, D.C. flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Louisville-Washington, D.C. flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Louisville to Washington, D.C.

Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Louisville with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from Louisville to Washington, D.C.?

Use this chart to determine the optimal time to book a round-trip flight from Louisville to Washington, D.C.. Price data was last updated on December 12, 2025.

Booking 41 days in advance of your planned departure date is, on average, the best time to get cheap flights from Louisville to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Louisville to Washington, D.C.?

Currently, October is the cheapest month in which you can book a flight from Louisville to Washington, D.C. (average of $108). Flying from Louisville to Washington, D.C. in June is currently the most expensive (average of $181). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SDF to WAS?

Find hourly flight availability from Louisville to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 63% on flights from Louisville to Washington, D.C. by exploring options for tickets in the afternoon.

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

Use this chart to determine the cheapest time to fly round-trip from Louisville to Washington, D.C.. Price data was last updated on December 13, 2025.

Travelers seeking maximum savings on their Louisville to Washington, D.C. flight should consider departing on Tuesday at noon when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Louisville to Washington, D.C.?

The best insider tips for Louisville to Washington, D.C. flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Louisville to Washington, D.C. trip
Airlines
Lufthansa

Lufthansa's Economy Flex includes preferred seating and same-day flight changes.


Lufthansa offers a Free Neighbor Seat for extra space on long-haul flights.

Read more about LufthansaBy Blane Bachelor
United Airlines

Basic Economy on United allows no carry-on bags, only a personal item under the seat.


Prepay checked bags on United at least 24 hours before to save on fees.

Read more about United AirlinesBy Harriet Baskas
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on Lufthansa

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Harriet Baskas

Harriet Baskas

Expert on United 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

Reviews of airlines servicing Washington, D.C.

Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated December 18, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Louisville to Washington, D.C. have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,091 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,054 reviews
Southwest
7.9
Good
4,250 reviews

Food

7.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Overall

7.9

Boarding

8.1

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Louisville to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Louisville to Washington, D.C.?

    Most people fly from Louisville Intl (SDF) if they book a flight from Louisville to Washington, D.C.. On average, Louisville Intl has 3 outbound flights to Washington, D.C. per day from 4 airlines. Louisville Intl is conveniently located just 5.3 mi from Louisville’s city center.

  • How long is the flight from Louisville to Washington, D.C.?

    Airlines like Delta and Southwest fly from Louisville to Washington, D.C. in about 4h 59m. The time it takes to get you to your destination can typically vary by up to 1h 16m. There are 472 mi between Louisville and Washington, D.C.. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Louisville to Washington, D.C. round-trip?

    American Airlines, at $189, was found to be the cheapest airline from Louisville to Washington, D.C..Alternate airlines to your destination round-trip include United Airlines and Delta. You may be able to fly from Louisville to Washington, D.C. for 28% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Louisville to Washington, D.C. one-way?

    One-way options have recently been found by users for as low as $89 on American Airlines. Other airlines that offer cheap prices include Delta from $98 and Southwest from $109 one-way.

  • What are the most popular routes from Louisville to Washington, D.C.?

    Most travelers choose Louisville Intl - Washington, D.C. Reagan-National, Louisville Intl - Baltimore/Washington or Louisville Intl - Washington, D.C. Dulles Intl when deciding on the best route from Louisville to Washington, D.C..

  • What are the most reliable airlines from Louisville to Washington, D.C.?

    No one likes to see their flight delayed. When booking a flight from Louisville to Washington, D.C. consider choosing Lufthansa (88%), United Airlines (82%) or Copa Airlines (79%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Louisville to Washington, D.C.?

    Looking for the cheapest flight from Louisville to Washington, D.C.? While on average our users pay $1,533, our data indicates the cheapest price to be $198. The most popular route (Louisville Intl - Washington, D.C. Reagan-National), is priced around $209.

  • Can I find deals for flights from Louisville to Washington, D.C. that include hotel bookings?

    Yes. In addition to deals on Louisville to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Louisville to Washington, D.C.?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Louisville to Washington, D.C..

  • Can I find deals for business class flights from Louisville to Washington, D.C.?

    Yes. Cheapflights offers flight deals from Louisville to Washington, D.C. by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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

    Currently, October is the cheapest month in which you can book a flight from Louisville to Washington, D.C. (average of $108). Flying from Louisville to Washington, D.C. in June is currently the most expensive (average of $181). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Louisville to Washington, D.C.

Discover the top 4 airlines that operate flights from Louisville to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$179Average$327FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$186Average$323FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$189Average$285FlexibilityNo cancel feeOn-time69%
DeltaCheapest$198Average$295FlexibilityNo cancel feeOn-timeN/A

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