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Dulles Intl

$128+ Cheap flights from Louisville (SDF) to Dulles Intl (IAD)

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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — IAD
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Find cheap flights from Louisville to Dulles Intl 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Louisville Intl to Washington, D.C. Dulles Intl are usually found in July or September, booked 67 days in advance, depart on a Friday or Sunday and return on a Saturday

Cheap flight deals from Louisville to Dulles Intl

Cheapest flights from Louisville to Dulles Intl
Explore the most affordable flight options available from Louisville to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This United Airlines deal was found by Cheapflights users on 3/5. 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.
Tue 3/319:55 am
SDF
-
IAD
Nonstop1h 40m
United Airlines
Tue 4/75:45 pm
IAD
-
SDF
Nonstop1h 57m
United Airlines
Deal found 3/5$207
This United Airlines deal was found by Cheapflights users on 3/5. 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 5/2110:00 am
SDF
-
IAD
Nonstop1h 40m
United Airlines
Wed 5/278:31 am
IAD
-
SDF
Nonstop1h 52m
United Airlines
Deal found 3/5$209
This United Airlines deal was found by Cheapflights users on 3/5. 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 3/262:35 pm
SDF
-
IAD
Nonstop1h 38m
United Airlines
Sun 3/295:45 pm
IAD
-
SDF
Nonstop1h 57m
United Airlines
Deal found 3/5$224
This Delta deal was found by Cheapflights users on 3/5. 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 3/316:00 am
SDF
-
IAD
1 stop5h 52m
Delta
Tue 4/77:18 am
IAD
-
SDF
1 stop6h 42m
Delta
Deal found 3/5$227
This Delta deal was found by Cheapflights users on 3/9. 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 4/239:38 am
SDF
-
IAD
1 stop6h 53m
Delta
Sun 4/266:00 am
IAD
-
SDF
1 stop4h 06m
Delta
Deal found 3/9$229
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 5/216:55 pm
SDF
-
IAD
2 stops16h 28m
Multiple Airlines
Sun 5/246:18 pm
IAD
-
SDF
1 stop14h 00m
Multiple Airlines
Deal found 3/8$231
This United Airlines deal was found by Cheapflights users on 3/7. 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 7/166:00 am
SDF
-
IAD
Nonstop1h 35m
United Airlines
Mon 7/205:25 pm
IAD
-
SDF
Nonstop1h 53m
United Airlines
Deal found 3/7$237
This United Airlines deal was found by Cheapflights users on 3/8. 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 3/279:55 am
SDF
-
IAD
Nonstop1h 43m
United Airlines
Sun 3/295:45 pm
IAD
-
SDF
Nonstop1h 57m
United Airlines
Deal found 3/8$240
This Delta deal was found by Cheapflights users on 3/9. 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 6/109:25 am
SDF
-
IAD
1 stop5h 19m
Delta
Tue 6/166:00 am
IAD
-
SDF
1 stop3h 51m
Delta
Deal found 3/9$243
This Delta deal was found by Cheapflights users on 3/9. 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 3/295:55 pm
SDF
-
IAD
1 stop5h 04m
Delta
Sun 4/56:01 am
IAD
-
SDF
1 stop5h 57m
Delta
Deal found 3/9$244

Find flight deals from Louisville to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Louisville (SDF) to Dulles Intl (IAD). 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 March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$207
(United Airlines)

One-way from

$128
(Kiwi.com)

Popular in

February

Cheapest in

July

Average price

$329

Good round-trip deal

$357 or less

Good one-way deal

$293 or less
Provider with most accurate pricing for Louisville Intl-Washington, D.C. Dulles Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Louisville Intl-Washington, D.C. Dulles Intl flights.
Search Deals
From Louisville Intl to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Louisville Intl to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($79 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Louisville Intl to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Louisville Intl to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Louisville to Dulles Intl 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 March 10, 2026.
Use the filters below to find and compare flights from Louisville to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 6/10

9:25 am-2:44 pm

1 stop5h 19m

Washington, D.C. Dulles Intl

Tue 6/16

6:00 am-9:51 am

1 stop3h 51m

$229

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 4/23

9:55 am-11:35 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Sun 4/26

5:45 pm-7:42 pm

Nonstop1h 57m

$229

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 4/15

11:12 am-4:31 pm

1 stop5h 19m

Washington, D.C. Dulles Intl

Sat 4/18

3:00 pm-9:31 pm

1 stop6h 31m

$229

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 4/9

9:55 am-11:35 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Thu 4/16

5:45 pm-7:42 pm

Nonstop1h 57m

$229

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 4/1

10:50 am-4:52 pm

1 stop6h 02m

Washington, D.C. Dulles Intl

Sat 4/4

6:01 am-12:47 pm

1 stop6h 46m

$243

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Fri 4/10

7:37 pm-12:27 am

1 stop4h 50m

Washington, D.C. Dulles Intl

Mon 4/13

5:27 pm-11:59 pm

1 stop6h 32m

$254
Quickest round-trip

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sun 7/19

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Sat 7/25

12:48 pm-2:37 pm

Nonstop1h 49m

$269

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 5/13

9:55 am-11:35 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Sat 5/16

10:08 pm-11:59 pm

Nonstop1h 51m

$289

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 5/21

10:00 am-11:40 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Tue 5/26

5:38 pm-10:30 pm

1 stop4h 52m

$314

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Fri 5/22

7:10 am-11:52 am

1 stop4h 42m

Washington, D.C. Dulles Intl

Tue 5/26

12:48 pm-2:37 pm

Nonstop1h 49m

$314

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 23 resultsSorted by cheapest first
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Compare providers for flights from Louisville to Dulles Intl

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 Dulles Intl in March.
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 Louisville-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Louisville-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Louisville-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Louisville-Washington, D.C. Dulles Intl Airport 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 Louisville-Washington, D.C. Dulles Intl Airport 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 Dulles Intl

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

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

Use this chart to determine the optimal time to book a round-trip flight from Louisville to Dulles Intl. Price data was last updated on March 6, 2026.

Booking 24 days in advance of your planned departure date is, on average, the best time to get cheap flights from Louisville to Washington, D.C. Dulles Intl Airport. 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. Dulles Intl Airport?

Currently, March is the cheapest month in which you can book a flight from Louisville to Washington, D.C. Dulles Intl Airport (average of $165). Flying from Louisville to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $222). 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 IAD?

Find hourly flight availability from Louisville to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 10, 2026.

When flying from Louisville to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

The best insider tips for Louisville to Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport trip
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on Lufthansa

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 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 Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated March 10, 2026.
Get a feel of what it's like to fly with Delta and United Airlines from Louisville to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

Boarding

8.1

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
8,276 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

Boarding

8.1

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
9,409 reviews
Delta
7.9
Good
8,276 reviews

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

7.9

Food

7.2

Boarding

8.1

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 Louisville to Dulles Intl. 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. Dulles Intl?

    Louisville Intl (SDF) is the airport you will fly out of if you book a flight from Louisville to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Louisville Intl; the airport handles an average of 5 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 2 airlines have flights from the Louisville airport to Washington, D.C. Dulles Intl. It is only a 5.3 mi journey to Louisville Intl (SDF) from Louisville’s city center.

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

    Airlines like Delta and United Airlines fly from Louisville to Washington, D.C. Dulles Intl Airport in about 1h 40m. The time it takes to get you to your destination can typically vary by up to 3h 39m. The distance between Louisville and Washington, D.C. Dulles Intl Airport is about 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 Louisville to Washington, D.C. Dulles Intl Airport round-trip?

    Our cheapest airline available from Louisville to Washington, D.C. Dulles Intl Airport is United Airlines. Our recent data shows that you can find tickets from as low as $189 on this airline. An additional option worth looking into is Delta, starting at $208. United Airlines is 41% cheaper than the average price of flights available within the next 90 days to this destination.

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

    $99 is the cheapest one-way deal found within the past few days, from Delta. You may also be able to find cheap deals on United Airlines and American Airlines, with prices starting from $128 and $134, respectively.

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

    Before booking your flight to Washington, D.C. Dulles Intl Airport from Louisville, check out the most reliable airlines to get you to your destination on time: Air Canada (92%), Copa Airlines (92%), United Airlines( 90%).

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

    Looking at all options, your cheapest flight can be booked for $163. While the most popular route (Louisville Intl - Washington, D.C. Dulles Intl) can be booked for $209 on average, our data indicates $567 when flying from Louisville to Washington, D.C. Dulles Intl Airport.

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

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

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

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

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

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

    Currently, March is the cheapest month in which you can book a flight from Louisville to Washington, D.C. Dulles Intl Airport (average of $165). Flying from Louisville to Washington, D.C. Dulles Intl Airport in August is currently the most expensive (average of $222). 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. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Silver Spring
Herndon
Hyattsville
Hanover
Laurel
Rockville
Upper Marlboro
Linthicum Heights
Fredericksburg
Largo
Bowie
Clinton
Towson
College Park

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Louisville to Dulles Intl

Discover the top 2 airlines that operate flights from Louisville to Dulles Intl. 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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$189Average$288FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$279FlexibilityNo cancel feeOn-timeN/A

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