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$115+ Cheap flights from Dulles Intl (IAD) 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SDF
Aug 14 — Aug 211
Fri 8/14
Fri 8/21
1 adult, Economy
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Find cheap flights from Dulles Intl to Louisville with Cheapflights

1. Tell us where you want to go

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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Louisville Intl are usually found in January or December, booked 65 days in advance, depart on a Saturday or Wednesday and return on a Friday

Cheap flight deals from Dulles Intl to Louisville

Cheapest flights from Dulles Intl to Louisville
Explore the most affordable flight options available from Dulles Intl to Louisville. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 15, 2026.

This United Airlines deal was found by Cheapflights users on 7/13. 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.
Fri 8/145:25 pm
IAD
-
SDF
Nonstop1h 50m
United Airlines
Sun 8/166:00 am
SDF
-
IAD
Nonstop1h 35m
United Airlines
Deal found 7/13$249
This United Airlines deal was found by Cheapflights users on 7/14. 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.
Thu 8/68:31 am
IAD
-
SDF
Nonstop1h 52m
United Airlines
Sun 8/96:00 am
SDF
-
IAD
Nonstop1h 35m
United Airlines
Deal found 7/14$253
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/1212:28 pm
IAD
-
SDF
1 stop22h 04m
Multiple Airlines
Mon 8/179:10 pm
SDF
-
IAD
1 stop22h 34m
Multiple Airlines
Deal found 7/13$256
This American Airlines deal was found by Cheapflights users on 7/11. 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 8/51:23 pm
IAD
-
SDF
1 stop4h 36m
American Airlines
Wed 8/126:05 am
SDF
-
IAD
1 stop3h 52m
American Airlines
Deal found 7/11$259
This Delta deal was found by Cheapflights users on 7/13. 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.
Thu 10/86:00 am
IAD
-
SDF
1 stop3h 59m
Delta
Mon 10/126:00 am
SDF
-
IAD
1 stop5h 32m
Delta
Deal found 7/13$263
This American Airlines deal was found by Cheapflights users on 7/10. 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 8/15:03 am
IAD
-
SDF
1 stop6h 18m
American Airlines
Wed 8/57:12 pm
SDF
-
IAD
1 stop3h 43m
American Airlines
Deal found 7/10$264
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/68:25 am
IAD
-
SDF
2 stops9h 50m
Multiple Airlines
Sun 8/99:24 pm
SDF
-
IAD
1 stop13h 01m
Multiple Airlines
Deal found 7/13$265
This Kiwi.com deal was found by Cheapflights users on 7/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:52 pm
IAD
-
SDF
1 stop23h 42m
Multiple Airlines
Sun 9/66:55 pm
SDF
-
IAD
2 stops21h 18m
Multiple Airlines
Deal found 7/12$266
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:09 pm
IAD
-
SDF
1 stop15h 40m
Multiple Airlines
Sat 8/228:46 pm
SDF
-
IAD
2 stops20h 28m
Multiple Airlines
Deal found 7/13$268
This Delta deal was found by Cheapflights users on 7/13. 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 9/118:00 am
IAD
-
SDF
1 stop4h 20m
Delta
Sun 9/136:00 am
SDF
-
IAD
1 stop5h 31m
Delta
Deal found 7/13$269
This Kiwi.com deal was found by Cheapflights users on 7/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/512:28 pm
IAD
-
SDF
1 stop22h 04m
Multiple Airlines
Sun 8/96:55 pm
SDF
-
IAD
2 stops21h 18m
Multiple Airlines
Deal found 7/13$271
This Delta deal was found by Cheapflights users on 7/11. 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 10/23:15 pm
IAD
-
SDF
1 stop5h 18m
Delta
Tue 10/65:45 pm
SDF
-
IAD
1 stop6h 46m
Delta
Deal found 7/11$273

Find flight deals from Dulles Intl to Louisville

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) 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 July 15, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(United Airlines)

One-way from

$115
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$357

Good round-trip deal

$315 or less

Good one-way deal

$258 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Louisville Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Louisville Intl flights.
Search Deals
From Washington, D.C. Dulles Intl to Louisville Intl
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Louisville Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($48 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($11 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Louisville Intl.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Louisville Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl 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 July 15, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Louisville that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 8/1

12:48 pm-2:37 pm

Nonstop1h 49m

Louisville Intl

Wed 8/5

1:48 pm-3:32 pm

Nonstop1h 44m

$249

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Fri 8/7

7:26 pm-12:34 am

1 stop5h 08m

Louisville Intl

Sun 8/9

7:05 am-11:33 am

1 stop4h 28m

$269
Quickest round-trip

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Tue 8/4

8:31 am-10:23 am

Nonstop1h 52m

Louisville Intl

Sat 8/8

6:00 am-7:35 am

Nonstop1h 35m

$277

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 8/8

5:25 pm-7:18 pm

Nonstop1h 53m

Louisville Intl

Mon 8/10

6:00 am-7:35 am

Nonstop1h 35m

$278

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Thu 8/20

12:50 pm-2:37 pm

Nonstop1h 47m

Louisville Intl

Sat 8/22

10:05 am-11:47 am

Nonstop1h 42m

$278

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Fri 10/23

7:38 pm-12:02 am

1 stop4h 24m

Louisville Intl

Sun 10/25

7:30 pm-12:31 am

1 stop5h 01m

$294

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Fri 8/21

5:25 pm-7:15 pm

Nonstop1h 50m

Louisville Intl

Wed 8/26

1:56 pm-3:34 pm

Nonstop1h 38m

$298

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Fri 8/28

3:40 pm-8:36 pm

1 stop4h 56m

Louisville Intl

Mon 8/31

1:56 pm-3:34 pm

Nonstop1h 38m

$301

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 8/29

12:50 pm-2:37 pm

Nonstop1h 47m

Louisville Intl

Sun 8/30

9:00 am-1:55 pm

1 stop4h 55m

$301

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Thu 10/15

8:35 am-10:18 am

Nonstop1h 43m

Louisville Intl

Sat 10/17

6:15 am-11:25 am

1 stop5h 10m

$301

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/13

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Dulles Intl 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 Dulles Intl to Louisville in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 Washington, D.C. Dulles Intl 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. Dulles Intl Airport-Louisville flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Louisville flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl 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. Dulles Intl 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 Dulles Intl to Louisville

Have a flexible travel schedule? Discover the best time to fly to Louisville from Dulles Intl 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. Dulles Intl Airport to Louisville

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

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to Louisville may vary depending on when you book. For the best chance of a lower fare, look to book 21 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. Dulles Intl Airport to Louisville?

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Louisville (average of $249). Flying from Washington, D.C. Dulles Intl Airport to Louisville in June is currently the most expensive (average of $459). 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 IAD to SDF?

Find hourly flight availability from Dulles Intl 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 July 15, 2026.

One of the essential ways to save on airfare from Washington, D.C. Dulles Intl Airport to Louisville is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 11% on airfare.

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl 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 July 15, 2026.
Read reviews from past customers who have flown Delta and United Airlines from Washington, D.C. Dulles Intl Airport to Louisville. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,469 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

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
8,469 reviews
Delta
7.8
Good
8,469 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,988 reviews
Delta
7.8
Good
8,469 reviews

Crew

8.5

Food

7.2

Entertainment

7.8

Overall

7.8

Comfort

7.8

Boarding

8.1

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 Dulles Intl 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. Dulles Intl?

    Louisville Intl (SDF) is the airport you will fly into if you book a flight from Washington, D.C. Dulles Intl to Louisville. You should not have trouble finding flights to Louisville Intl from Washington, D.C. Dulles Intl; the airport handles an average of 7 inbound flights from Washington, D.C. Dulles Intl 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. Dulles Intl. 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. Dulles Intl Airport to Louisville?

    A quick flight from Washington, D.C. Dulles Intl Airport to Louisville can take about 1h 49m. United Airlines provides one of the quickest options available for as low as $249. Washington, D.C. Dulles Intl Airport and Louisville are separated by a distance of 450 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    According to our current data, United Airlines ($189), and Delta ($208) offers the cheapest pricing from Washington, D.C. Dulles Intl Airport to Louisville. You may be able to fly from Washington, D.C. Dulles Intl Airport to Louisville for 44% less than the average price by searching for these airlines.

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

    The top 3 most reliable airlines when flying from Washington, D.C. Dulles Intl Airport to Louisville are Copa Airlines (89%), Republic Airways (85%) and Air Canada (84%).

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

    Looking at all options, your cheapest flight can be booked for $178. While the most popular route (Washington, D.C. Dulles Intl - Louisville Intl) can be booked for $207 on average, our data indicates $380 when flying from Washington, D.C. Dulles Intl Airport to Louisville.

  • Can I find deals for flights from Dulles Intl to Louisville that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Louisville flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Louisville?

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

  • Can I find deals for business class flights from Dulles Intl to Louisville?

    Yes. Cheapflights offers flight deals from Dulles Intl 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. Dulles Intl Airport to Louisville?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Louisville (average of $249). Flying from Washington, D.C. Dulles Intl Airport to Louisville in June is currently the most expensive (average of $459). 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 Dulles Intl to Louisville

Discover the top 2 airlines that operate flights from Dulles Intl 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 July 15, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$189Average$333FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$347FlexibilityNo cancel feeOn-timeN/A

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