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$129+ 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 2/23. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SDF
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Louisville Intl are usually found in February or July, booked 28 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 December 4, 2025.

This Delta deal was found by Cheapflights users on 12/1. 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 12/316:00 amIAD - SDF
1 stop7h 12mDelta
Mon 1/55:45 pmSDF - IAD
1 stop5h 52mDelta
Deal found 12/1$219
This Delta deal was found by Cheapflights users on 12/2. 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 12/187:01 amIAD - SDF
1 stop7h 10mDelta
Sat 1/1010:51 amSDF - IAD
1 stop5h 55mDelta
Deal found 12/2$234
This United Airlines deal was found by Cheapflights users on 12/1. 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 12/295:15 pmIAD - SDF
Nonstop1h 56mUnited Airlines
Fri 1/29:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Deal found 12/1$247
This United Airlines deal was found by Cheapflights users on 12/3. 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 12/2412:51 pmIAD - SDF
Nonstop1h 53mUnited Airlines
Thu 12/259:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Deal found 12/3$249
This Delta deal was found by Cheapflights users on 12/3. 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 12/316:00 amIAD - SDF
1 stop7h 12mDelta
Sun 1/46:06 pmSDF - IAD
1 stop5h 02mDelta
Deal found 12/3$262
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/315:15 pmIAD - SDF
Nonstop1h 56mUnited Airlines
Sun 1/49:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Deal found 12/2$264
This Delta deal was found by Cheapflights users on 12/2. 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 12/127:35 pmIAD - SDF
1 stop4h 24mDelta
Tue 12/1612:58 pmSDF - IAD
1 stop4h 02mDelta
Deal found 12/2$269
This Delta deal was found by Cheapflights users on 12/3. 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.
Sun 12/216:00 amIAD - SDF
1 stop7h 12mDelta
Sat 1/1010:51 amSDF - IAD
1 stop5h 55mDelta
Deal found 12/3$274
This United Airlines deal was found by Cheapflights users on 12/2. 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 12/265:15 pmIAD - SDF
Nonstop1h 56mUnited Airlines
Wed 12/319:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Deal found 12/2$277
This Kiwi.com deal was found by Cheapflights users on 12/4. 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 12/115:21 pmIAD - SDF
1 stop23h 02mAllegiant Air
Sun 12/142:34 pmSDF - IAD
1 stop18h 07mAllegiant Air
Deal found 12/4$278
This United Airlines deal was found by Cheapflights users on 12/4. 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 12/1112:50 pmIAD - SDF
Nonstop1h 55mUnited Airlines
Mon 12/152:05 pmSDF - IAD
Nonstop1h 36mUnited Airlines
Deal found 12/4$279

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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$217
(Delta)

One-way from

$129
(United Airlines)

Popular in

November

Cheapest in

February

Average price

$351

Good round-trip deal

$269 or less

Good one-way deal

$213 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. 6% potential increase in price ($24 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($6 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 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 December 4, 2025.
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

Dulles Intl

Fly to

Louisville

Route

Depart

Return

Price

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 2/21

6:00 am-10:04 am

1 stop4h 04m

Louisville Intl

Mon 2/23

6:33 pm-11:09 pm

1 stop4h 36m

$217

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Thu 1/1

6:00 am-1:12 pm

1 stop7h 12m

Louisville Intl

Thu 1/8

6:00 am-10:55 am

1 stop4h 55m

$219

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Thu 1/15

6:00 am-10:11 am

1 stop4h 11m

Louisville Intl

Sun 1/18

7:50 am-11:49 am

1 stop3h 59m

$239

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Thu 12/18

6:00 am-10:04 am

1 stop4h 04m

Louisville Intl

Sat 1/10

10:51 am-4:46 pm

1 stop5h 55m

$244

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Mon 12/29

5:15 pm-7:11 pm

Nonstop1h 56m

Louisville Intl

Fri 1/2

9:55 am-11:36 am

Nonstop1h 41m

$247

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 2/21

5:43 pm-7:42 pm

Nonstop1h 59m

Louisville Intl

Mon 2/23

9:50 am-11:33 am

Nonstop1h 43m

$249

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Wed 1/21

12:50 pm-2:48 pm

Nonstop1h 58m

Louisville Intl

Sat 1/24

8:29 am-9:17 pm

1 stop12h 48m

$262

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Thu 2/19

6:00 am-10:04 am

1 stop4h 04m

Louisville Intl

Sun 2/22

12:11 pm-6:36 pm

1 stop6h 25m

$262

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Wed 12/31

12:51 pm-2:44 pm

Nonstop1h 53m

Louisville Intl

Sun 1/4

9:55 am-11:36 am

Nonstop1h 41m

$264

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sun 12/21

6:00 am-1:12 pm

1 stop7h 12m

Louisville Intl

Sat 1/10

7:40 am-2:45 pm

1 stop7h 05m

$264

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/2

Showing 1-10 of 20 results
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 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 Washington, D.C. Dulles Intl Airport-Louisville flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Louisville flight deals on Cheapflights vs. eDreams >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 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 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?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Louisville. Price data was last updated on November 28, 2025.

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 28 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, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Louisville (average of $135). Flying from Washington, D.C. Dulles Intl Airport to Louisville in April is currently the most expensive (average of $205). 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 December 4, 2025.

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 morning could potentially save you up to 5% on airfare.

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 December 4, 2025.
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
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,011 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,066 reviews
Delta
7.9
Good
8,011 reviews

Comfort

7.9

Overall

7.9

Crew

8.5

Boarding

8.1

Food

7.3

Entertainment

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 5 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 56m. Delta provides one of the quickest options available for as low as $247. 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 ($203) 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 42% 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 United Airlines (83%), Mesa Airlines (83%) and Air Canada (82%).

  • 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 $158. While the most popular route (Washington, D.C. Dulles Intl - Louisville Intl) can be booked for $169 on average, our data indicates $340 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, May is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Louisville (average of $135). Flying from Washington, D.C. Dulles Intl Airport to Louisville in April is currently the most expensive (average of $205). 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
Shepherdsville
Jeffersonville
Elizabethtown
Corydon
Bardstown

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Alternative routes for Dulles Intl to Louisville

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$189Average$320FlexibilityNo cancel feeOn-time69%
DeltaCheapest$203Average$273FlexibilityNo cancel feeOn-timeN/A

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