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Dulles Intl

$135+ 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 8/20. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — IAD
Aug 24 — Aug 311
Mon 8/24
Mon 8/31
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

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

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Cheapflights Tip: The best prices from Louisville Intl to Washington, D.C. Dulles Intl are usually found in March or September, booked 61 days in advance, depart on a Friday or Thursday 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 July 25, 2026.

This United Airlines deal was found by Cheapflights users on 7/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2210:05 am
SDF
-
IAD
Nonstop1h 42m
United Airlines
Sat 8/2912:50 pm
IAD
-
SDF
Nonstop1h 47m
United Airlines
Deal found 7/23$171
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/111:56 pm
SDF
-
IAD
Nonstop1h 38m
United Airlines
Mon 9/148:35 am
IAD
-
SDF
Nonstop1h 43m
United Airlines
Deal found 7/24$194
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/191:56 pm
SDF
-
IAD
Nonstop1h 38m
United Airlines
Tue 9/2212:50 pm
IAD
-
SDF
Nonstop1h 47m
United Airlines
Deal found 7/24$201
This United Airlines deal was found by Cheapflights users on 7/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/51:56 pm
SDF
-
IAD
Nonstop1h 38m
United Airlines
Mon 9/78:35 am
IAD
-
SDF
Nonstop1h 43m
United Airlines
Deal found 7/23$207
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:00 am
SDF
-
IAD
Nonstop1h 35m
United Airlines
Mon 10/198:35 am
IAD
-
SDF
Nonstop1h 43m
United Airlines
Deal found 7/24$215
This Delta deal was found by Cheapflights users on 7/23. 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.
Thu 8/139:52 am
SDF
-
IAD
1 stop6h 50m
Delta
Mon 8/177:26 pm
IAD
-
SDF
1 stop5h 08m
Delta
Deal found 7/23$227
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1310:05 am
SDF
-
IAD
Nonstop1h 42m
United Airlines
Thu 8/205:25 pm
IAD
-
SDF
Nonstop1h 50m
United Airlines
Deal found 7/24$230
This Delta deal was found by Cheapflights users on 7/23. 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.
Wed 9/210:34 am
SDF
-
IAD
1 stop6h 04m
Delta
Sun 9/65:47 pm
IAD
-
SDF
1 stop4h 21m
Delta
Deal found 7/23$232
This Delta deal was found by Cheapflights users on 7/21. 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 9/53:25 pm
SDF
-
IAD
1 stop4h 40m
Delta
Sun 9/66:10 am
IAD
-
SDF
1 stop3h 44m
Delta
Deal found 7/21$237
This United Airlines deal was found by Cheapflights users on 7/21. 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 9/41:56 pm
SDF
-
IAD
Nonstop1h 38m
United Airlines
Sun 9/65:25 pm
IAD
-
SDF
Nonstop1h 50m
United Airlines
Deal found 7/21$238
This United Airlines deal was found by Cheapflights users on 7/20. 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 8/1210:05 am
SDF
-
IAD
Nonstop1h 42m
United Airlines
Mon 8/178:35 am
IAD
-
SDF
Nonstop1h 43m
United Airlines
Deal found 7/20$239
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/299:55 am
SDF
-
IAD
Nonstop1h 38m
United Airlines
Mon 11/212:50 pm
IAD
-
SDF
Nonstop1h 57m
United Airlines
Deal found 7/24$241

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 July 25, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$171
(United Airlines)

One-way from

$135
(Kiwi.com)

Popular in

February

Cheapest in

March

Average price

$289

Good round-trip deal

$411 or less

Good one-way deal

$256 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 ($78 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($27 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 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 July 25, 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
Quickest round-trip

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Fri 10/16

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Wed 10/21

8:35 am-10:18 am

Nonstop1h 43m

$215

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 8/13

10:05 am-11:47 am

Nonstop1h 42m

Washington, D.C. Dulles Intl

Thu 8/20

5:25 pm-7:15 pm

Nonstop1h 50m

$230

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 12/9

10:00 am-11:39 am

Nonstop1h 39m

Washington, D.C. Dulles Intl

Tue 1/5

5:55 pm-7:34 pm

Nonstop1h 39m

$239

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sat 10/24

3:24 pm-8:14 pm

1 stop4h 50m

Washington, D.C. Dulles Intl

Sun 10/25

6:00 am-11:36 am

1 stop5h 36m

$253

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sat 8/22

10:05 am-11:47 am

Nonstop1h 42m

Washington, D.C. Dulles Intl

Sat 8/29

10:35 am-4:38 pm

1 stop6h 03m

$288

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 9/3

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Sat 9/5

3:40 pm-8:36 pm

1 stop4h 56m

$288

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 9/10

1:15 pm-8:14 pm

1 stop6h 59m

Washington, D.C. Dulles Intl

Sun 9/13

6:10 am-9:52 am

1 stop3h 42m

$289

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sat 9/19

10:32 am-4:30 pm

1 stop5h 58m

Washington, D.C. Dulles Intl

Wed 9/23

6:10 am-9:52 am

1 stop3h 42m

$289

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 9/9

5:50 pm-11:14 pm

1 stop5h 24m

Washington, D.C. Dulles Intl

Sun 9/13

6:10 am-9:52 am

1 stop3h 42m

$289

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 8/6

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Sun 8/9

8:31 am-10:23 am

Nonstop1h 52m

$289

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/24

Showing 1-10 of 22 resultsSorted by cheapest first
1
2
3

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 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 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?

Booking 23 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 $274). Flying from Louisville to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $628). 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 July 25, 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.

How much does it cost to fly round-trip from Louisville to Washington, D.C. Dulles Intl Airport?

Airfare is below average for this route at the moment.

Louisville to Washington, D.C. Dulles Intl Airport flights typically cost between $266 and $316 in August.
The cheapest round-trip price found within the last 5 days was $171 on United Airlines (Aug 22-Aug 29).

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 July 25, 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
7.8
Good
8,486 reviews

Boarding

8.1

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

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
8,486 reviews
Delta
7.8
Good
8,486 reviews

Boarding

8.1

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

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
10,034 reviews
Delta
7.8
Good
8,486 reviews

Boarding

8.1

Overall

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.8

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 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 7 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 United Airlines and Delta fly from Louisville to Washington, D.C. Dulles Intl Airport in about 1h 35m. The time it takes to get you to your destination can typically vary by up to 3h 15m. 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 42% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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: Copa Airlines (94%), Republic Airways (94%), Air Canada( 93%).

  • 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 $229. While the most popular route (Louisville Intl - Washington, D.C. Dulles Intl) can be booked for $171 on average, our data indicates $1,445 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 $274). Flying from Louisville to Washington, D.C. Dulles Intl Airport in February is currently the most expensive (average of $628). 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
Tysons
Arlington
Owings Mills
Springfield
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Falls Church
Hanover
Manassas
Laurel
Sterling
Clinton
Hunt Valley
Cordova

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 July 25, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$189Average$299FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$293FlexibilityNo cancel feeOn-timeN/A

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