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$106+ Cheap flights from Reagan-National (DCA) to Louisville (SDF)

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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
DCA — SDF
Jul 27 — Aug 31
Mon 7/27
Mon 8/3
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Reagan-National to Louisville Intl are usually found in August or January, booked 60 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Reagan-National to Louisville

Cheapest flights from Reagan-National to Louisville
Explore the most affordable flight options available from Reagan-National to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 27, 2026.

This American Airlines deal was found by Cheapflights users on 6/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/287:45 pm
DCA
-
SDF
Nonstop1h 53m
American Airlines
Sun 8/307:33 am
SDF
-
DCA
Nonstop1h 54m
American Airlines
Deal found 6/27$249
This Southwest deal was found by Cheapflights users on 6/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:05 am
DCA
-
SDF
1 stop5h 15m
Southwest
Mon 9/217:10 pm
SDF
-
DCA
1 stop4h 45m
Southwest
Deal found 6/26$250
This Delta deal was found by Cheapflights users on 6/26. 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.
Fri 8/219:00 am
DCA
-
SDF
1 stop5h 18m
Delta
Mon 8/245:25 pm
SDF
-
DCA
1 stop5h 34m
Delta
Deal found 6/26$253
This Delta deal was found by Cheapflights users on 6/25. 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.
Fri 8/147:45 pm
DCA
-
SDF
1 stop4h 49m
Delta
Thu 8/271:17 pm
SDF
-
DCA
1 stop5h 16m
Delta
Deal found 6/25$254
This Southwest deal was found by Cheapflights users on 6/25. 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 7/284:00 pm
DCA
-
SDF
1 stop5h 45m
Southwest
Fri 7/316:05 pm
SDF
-
DCA
1 stop5h 15m
Southwest
Deal found 6/25$255
This American Airlines deal was found by Cheapflights users on 6/24. 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 7/137:16 am
DCA
-
SDF
Nonstop1h 56m
American Airlines
Thu 7/302:16 pm
SDF
-
DCA
Nonstop1h 43m
American Airlines
Deal found 6/24$264
This Delta deal was found by Cheapflights users on 6/23. 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.
Fri 7/177:37 pm
DCA
-
SDF
1 stop4h 49m
Delta
Sat 7/183:50 pm
SDF
-
DCA
1 stop5h 59m
Delta
Deal found 6/23$265
This Southwest deal was found by Cheapflights users on 6/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:10 am
DCA
-
SDF
2 stops11h 05m
Southwest
Mon 8/103:20 pm
SDF
-
DCA
1 stop4h 20m
Southwest
Deal found 6/27$266
This American Airlines deal was found by Cheapflights users on 6/25. 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.
Sat 10/103:25 pm
DCA
-
SDF
1 stop6h 13m
American Airlines
Sat 10/176:37 pm
SDF
-
DCA
Nonstop1h 37m
American Airlines
Deal found 6/25$268
This Delta deal was found by Cheapflights users on 6/27. 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.
Fri 8/286:10 am
DCA
-
SDF
1 stop3h 44m
Delta
Sun 8/306:00 am
SDF
-
DCA
1 stop5h 27m
Delta
Deal found 6/27$269

Find flight deals from Reagan-National to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to Louisville (SDF). 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 June 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(American Airlines)

One-way from

$106
(Southwest)

Popular in

March

Cheapest in

August

Average price

$271

Good round-trip deal

$283 or less

Good one-way deal

$243 or less
Provider with most accurate pricing for Washington, D.C. Reagan-National-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Reagan-National-Louisville Intl flights.
Search Deals
From Washington, D.C. Reagan-National to Louisville Intl
Search Deals
One-way flight from Washington, D.C. Reagan-National to Louisville Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($57 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Reagan-National to Louisville Intl.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Reagan-National to Louisville Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Reagan-National to Louisville 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 June 27, 2026.
Use the filters below to find and compare flights from Washington, D.C. Reagan-National Airport to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Fri 8/21

9:00 am-2:18 pm

1 stop5h 18m

Louisville Intl

Mon 8/24

5:25 pm-10:59 pm

1 stop5h 34m

$253

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Fri 7/17

7:37 pm-12:26 am

1 stop4h 49m

Louisville Intl

Sat 7/18

3:50 pm-9:49 pm

1 stop5h 59m

$265
Quickest round-trip

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Fri 8/7

6:10 am-9:54 am

1 stop3h 44m

Louisville Intl

Sun 8/9

7:05 am-11:27 am

1 stop4h 22m

$269

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Thu 7/9

12:27 pm-5:49 pm

1 stop5h 22m

Louisville Intl

Mon 7/13

5:28 pm-10:59 pm

1 stop5h 31m

$284

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Tue 7/14

4:25 pm-8:30 pm

1 stop4h 05m

Louisville Intl

Wed 7/15

5:25 pm-11:15 pm

1 stop5h 50m

$299

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Thu 7/23

5:25 pm-10:55 pm

1 stop5h 30m

Louisville Intl

Tue 7/28

12:40 pm-5:50 pm

1 stop5h 10m

$299

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Thu 10/1

3:00 pm-10:20 pm

2 stops7h 20m

Louisville Intl

Mon 10/5

4:15 pm-10:45 pm

2 stops6h 30m

$309

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Wed 10/21

1:15 pm-8:30 pm

2 stops7h 15m

Louisville Intl

Sun 10/25

3:15 pm-11:50 pm

1 stop8h 35m

$317

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Tue 7/28

1:00 pm-8:30 pm

2 stops7h 30m

Louisville Intl

Thu 7/30

8:45 am-4:20 pm

2 stops7h 35m

$322

Washington, D.C.Louisville

DCA - SDF

DCASDF

Washington, D.C. Reagan-National

Thu 7/16

1:10 pm-10:30 pm

2 stops9h 20m

Louisville Intl

Sat 7/18

5:25 am-11:30 am

1 stop6h 05m

$325

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/25

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Reagan-National to Louisville

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 Reagan-National to Louisville in June.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust 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 Washington, D.C. Reagan-National Airport-Louisville flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Reagan-National Airport-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Reagan-National Airport-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Reagan-National Airport-Louisville flights, Cheapflights users trust FlightHub the most. FlightHub 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 Washington, D.C. Reagan-National Airport-Louisville 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 Reagan-National to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Reagan-National 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 Washington, D.C. Reagan-National Airport to Louisville

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

The price you pay for your flight from Washington, D.C. Reagan-National Airport to Louisville may vary depending on when you book. For the best chance of a lower fare, look to book 59 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Louisville (average of $228). Flying from Washington, D.C. Reagan-National Airport to Louisville in March is currently the most expensive (average of $466). 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 DCA to SDF?

Find hourly flight availability from Reagan-National to Louisville. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 27, 2026.

It’s typically best to fly out from Washington, D.C. Reagan-National Airport to Louisville in the afternoon. Doing so could potentially save you 22% on the flight price compared to flying at noon, which is usually more expensive.

What is the cheapest day to fly from Washington, D.C. Reagan-National Airport to Louisville?

Use this chart to determine the cheapest time to fly round-trip from Reagan-National to Louisville. Price data was last updated on June 27, 2026.

Travelers seeking maximum savings on their Washington, D.C. Reagan-National Airport to Louisville flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Sunday afternoons 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 Washington, D.C. Reagan-National Airport to Louisville?

Reviews of airlines servicing Louisville

Get insights into the airlines that provide service to Louisville. 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 Louisville. Reviews last updated June 27, 2026.
See what other customers who have flown with Delta and American Airlines from Washington, D.C. Reagan-National Airport to Louisville have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,451 reviews

Comfort

7.8

Entertainment

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,451 reviews
Delta
7.8
Good
8,451 reviews

Comfort

7.8

Entertainment

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
American Airlines
7.1
Good
11,779 reviews
Delta
7.8
Good
8,451 reviews

Comfort

7.8

Entertainment

7.8

Overall

7.8

Crew

8.5

Boarding

8.1

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to Louisville. 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 into for flights to Louisville from Washington, D.C. Reagan-National?

    Louisville Intl (SDF) is the airport you will fly into if you book a flight from Washington, D.C. Reagan-National to Louisville. You should not have trouble finding flights to Louisville Intl from Washington, D.C. Reagan-National; the airport handles an average of 2 inbound flights from Washington, D.C. Reagan-National per day. You should also have plenty of airline options to choose from since 2 airlines have flights to the Louisville airport from Washington, D.C. Reagan-National. It is only a 5.3 mi journey from Louisville Intl (SDF) to Louisville’s city center.

  • How long is the flight from Washington, D.C. Reagan-National Airport to Louisville?

    Airlines like Delta and Southwest fly from Washington, D.C. Reagan-National Airport to Louisville in about 4h 05m. The time it takes to get you to your destination can typically vary by up to 1h 13m. The distance from Washington, D.C. Reagan-National Airport to Louisville is about 472 mi. This flight may include one or multiple stops.

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

    Cheapflights users have booked flights from Washington, D.C. Reagan-National Airport to Louisville round-trip from $189. Another airline that can offer you cheap pricing is Delta. Users have found that American Airlines is 44% cheaper than the other options available to this destination.

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

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $124. However, be on the lookout for offers from Southwest and Delta, as they are both options that can get you from Washington, D.C. Reagan-National Airport to Louisville for a low price.

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

    Before booking your flight to Louisville from Washington, D.C. Reagan-National Airport, check out the most reliable airlines to get you to your destination on time: American Airlines (84%), PSA Airlines (84%), Republic Airways( 79%).

  • What are the cheapest flights from Washington, D.C. Reagan-National Airport to Louisville?

    Looking for the cheapest flight from Washington, D.C. Reagan-National Airport to Louisville? While on average our users pay $403, our data indicates the cheapest price to be $174. The most popular route (Washington, D.C. Reagan-National - Louisville Intl), is priced around $211.

  • Can I find deals for flights from Reagan-National to Louisville that include hotel bookings?

    Yes. In addition to deals on Reagan-National to Louisville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Reagan-National to Louisville?

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

  • Can I find deals for business class flights from Reagan-National to Louisville?

    Yes. Cheapflights offers flight deals from Reagan-National to Louisville 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 Washington, D.C. Reagan-National Airport to Louisville?

    Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to Louisville (average of $228). Flying from Washington, D.C. Reagan-National Airport to Louisville in March is currently the most expensive (average of $466). 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 Louisville?

Book flights to Louisville if you plan to visit one of these locations
Corydon
Shepherdsville
Elizabethtown
Jeffersonville
Bardstown

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Top 2 airlines flying from Reagan-National to Louisville

Discover the top 2 airlines that operate flights from Reagan-National to Louisville. 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 June 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$189Average$335FlexibilityNo cancel feeOn-time71%
DeltaCheapest$202Average$293FlexibilityNo cancel feeOn-timeN/A

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