HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Washington, D.C.

$89+ 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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — WAS
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Louisville Intl to Washington, D.C. are usually found in July or June, booked 72 days in advance, depart on a Friday or Thursday and return on a Saturday

Cheap 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 July 29, 2025.

Round-trip from

$177
(Southwest)

One-way from

$89
(Southwest)

Popular in

May

Cheapest in

July

Average price

$239

Good round-trip deal

$198 or less

Good one-way deal

$145 or less
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. 4% potential increase in price ($12 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 July 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

Find 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 July 29, 2025.

This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/213:50 pmSDF - BWI
Nonstop1h 40mSouthwest
Sat 10/255:45 pmBWI - SDF
Nonstop1h 45mSouthwest
Deal found 7/28$177
This American Airlines deal was found by Cheapflights users on 7/29. 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 8/127:37 pmSDF - DCA
Nonstop1h 47mAmerican Airlines
Tue 8/198:19 amDCA - SDF
Nonstop1h 46mAmerican Airlines
Deal found 7/29$188
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/259:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Mon 9/17:15 pmIAD - SDF
Nonstop1h 47mUnited Airlines
Deal found 7/28$189
This Southwest deal was found by Cheapflights users on 7/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/216:25 amSDF - DCA
1 stop3h 35mSouthwest
Sat 10/258:25 amDCA - SDF
1 stop6h 40mSouthwest
Deal found 7/28$192
This Delta deal was found by Cheapflights users on 7/26. 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.
Sat 8/237:14 pmSDF - DCA
1 stop3h 45mDelta
Sat 8/306:25 pmDCA - SDF
1 stop4h 17mDelta
Deal found 7/26$197
This Delta deal was found by Cheapflights users on 7/28. 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.
Sat 9/205:56 pmSDF - IAD
1 stop5h 21mDelta
Tue 9/237:20 amIAD - SDF
1 stop4h 23mDelta
Deal found 7/28$197
This Mytrip deal was found by Cheapflights users on 7/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/183:10 pmSDF - BWI
1 stop7h 18mSpirit Airlines
Tue 9/238:52 pmBWI - SDF
1 stop12h 27mSpirit Airlines
Deal found 7/27$216
This Delta deal was found by Cheapflights users on 7/27. 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.
Mon 8/257:14 pmSDF - BWI
1 stop4h 03mDelta
Tue 8/266:25 pmBWI - SDF
1 stop4h 17mDelta
Deal found 7/27$249
This American Airlines deal was found by Cheapflights users on 7/29. 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.
Thu 8/286:10 amSDF - BWI
1 stop3h 51mAmerican Airlines
Mon 9/110:53 amBWI - SDF
1 stop6h 29mAmerican Airlines
Deal found 7/29$257
This American Airlines deal was found by Cheapflights users on 7/28. 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 8/125:01 pmSDF - IAD
1 stop5h 55mAmerican Airlines
Tue 8/1910:25 amIAD - SDF
1 stop3h 58mAmerican Airlines
Deal found 7/28$260
This Mytrip deal was found by Cheapflights users on 7/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/183:10 pmSDF - IAD
2 stops21h 13mMultiple Airlines
Mon 9/2210:49 amIAD - SDF
2 stops11h 39mMultiple Airlines
Deal found 7/28$336

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 July 29, 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

Tue 10/21

3:50 pm-5:30 pm

Nonstop1h 40m

Baltimore/Washington

Sat 10/25

5:45 pm-7:30 pm

Nonstop1h 45m

$177

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Tue 8/12

7:37 pm-9:24 pm

Nonstop1h 47m

Washington, D.C. Reagan-National

Tue 8/19

8:19 am-10:05 am

Nonstop1h 46m

$188

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Mon 8/25

9:55 am-11:36 am

Nonstop1h 41m

Washington, D.C. Dulles Intl

Mon 9/1

7:15 pm-9:02 pm

Nonstop1h 47m

$189

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Tue 10/21

6:25 am-10:00 am

1 stop3h 35m

Washington, D.C. Reagan-National

Sat 10/25

8:25 am-3:05 pm

1 stop6h 40m

$192

LouisvilleWashington, D.C.

SDF - DCA

SDFDCA

Louisville Intl

Sat 8/23

7:14 pm-10:59 pm

1 stop3h 45m

Washington, D.C. Reagan-National

Sat 8/30

6:25 pm-10:42 pm

1 stop4h 17m

$197

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sat 9/20

5:56 pm-11:17 pm

1 stop5h 21m

Washington, D.C. Dulles Intl

Tue 9/23

7:20 am-11:43 am

1 stop4h 23m

$197

LouisvilleBaltimore

SDF - BWI

SDFBWI

Louisville Intl

Thu 9/18

3:10 pm-10:28 pm

1 stop7h 18m

Baltimore/Washington

Tue 9/23

8:52 pm-9:19 am

1 stop12h 27m

$216

LouisvilleBaltimore

SDF - BWI

SDFBWI

Louisville Intl

Mon 8/25

7:14 pm-11:17 pm

1 stop4h 03m

Baltimore/Washington

Tue 8/26

6:25 pm-10:42 pm

1 stop4h 17m

$249

LouisvilleBaltimore

SDF - BWI

SDFBWI

Louisville Intl

Thu 8/28

6:10 am-10:01 am

1 stop3h 51m

Baltimore/Washington

Mon 9/1

10:53 am-5:22 pm

1 stop6h 29m

$257

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Tue 8/12

5:01 pm-10:56 pm

1 stop5h 55m

Washington, D.C. Dulles Intl

Tue 8/19

10:25 am-2:23 pm

1 stop3h 58m

$260

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 25 results
1
2
3

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-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.
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

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 July 25, 2025.

Booking 27 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, August is the cheapest month in which you can book a flight from Louisville to Washington, D.C. (average of $241). Flying from Louisville to Washington, D.C. in March is currently the most expensive (average of $290). 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 July 29, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 73% on flights from Louisville to Washington, D.C. by exploring options for tickets in the evening.

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 July 27, 2025.

Travelers seeking maximum savings on their Louisville to Washington, D.C. flight should consider departing on Wednesday evenings 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.

Weekly flight availability from Louisville to Washington, D.C.

Explore weekly flight availability from Louisville to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2025.

The most flights from SDF to WAS are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).

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 July 29, 2025.
See what other customers who have flown with Southwest, Delta, and United 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
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,238 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Delta
8.0
Very good
7,977 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
United Airlines
7.4
Good
8,899 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Allegiant Air
7.2
Good
703 reviews
Southwest
8.0
Very good
4,238 reviews

Boarding

8.1

Overall

8.0

Entertainment

7.5

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

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 10 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 popular is this Louisville to Washington, D.C. flight route?

    This flight path from Louisville Intl to Washington, D.C. was viewed by 32 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    Southwest, at $177, was found to be the cheapest airline from Louisville to Washington, D.C..Alternate airlines to your destination round-trip include American Airlines and United Airlines. You may be able to fly from Louisville to Washington, D.C. for 31% 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 Southwest. Other airlines that offer cheap prices include American Airlines from $90 and United Airlines from $90 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 - Washington, D.C. Dulles Intl or Louisville Intl - Baltimore/Washington when deciding on the best route from Louisville to Washington, D.C..

  • 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 $244, our data indicates the cheapest price to be $107. The most popular route (Louisville Intl - Washington, D.C. Reagan-National), is priced around $192.

  • 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, August is the cheapest month in which you can book a flight from Louisville to Washington, D.C. (average of $241). Flying from Louisville to Washington, D.C. in March is currently the most expensive (average of $290). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Easton
Towson
Linthicum Heights
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
Springfield
National Harbor
Dundalk

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$189Average$293FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$189Average$336FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$192Average$319FlexibilityNo cancel feeOn-time63%
DeltaCheapest$198Average$337FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.