HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$146+ Cheap flights from Louisville (SDF) to Dulles Intl (IAD)

SDF — IAD
Oct 4 — Oct 111
Sun 10/4
Sun 10/11
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Louisville Intl to Washington, D.C. Dulles Intl are usually found in October or March, booked 70 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

Sat 10/175:33 pm -
1 stop5h 43m
Tue 10/206:12 pm -
1 stop5h 47m
Deal found 9/2$227
Fri 10/167:55 pm -
1 stop4h 47m
Mon 10/197:45 pm -
1 stop4h 14m
Deal found 9/1$228
Wed 10/76:00 am -
Nonstop1h 35m
Mon 10/128:35 am -
Nonstop1h 43m
Deal found 9/3$233
Wed 10/710:00 am -
Nonstop1h 42m
Sun 10/118:35 am -
Nonstop1h 43m
Deal found 9/2$243
Tue 9/1510:05 am -
Nonstop1h 42m
Tue 9/226:25 pm -
Nonstop1h 44m
Deal found 8/30$249
Fri 10/236:00 am -
Nonstop1h 35m
Wed 10/2812:50 pm -
Nonstop1h 57m
Deal found 8/30$251
Fri 9/256:00 am -
Nonstop1h 35m
Sun 9/278:35 am -
Nonstop1h 43m
Deal found 9/3$253
Sat 10/175:33 pm -
1 stop5h 43m
Sun 10/186:05 am -
1 stop3h 54m
Deal found 8/31$254
Tue 9/221:56 pm -
Nonstop1h 38m
Tue 9/2912:55 pm -
Nonstop1h 44m
Deal found 9/1$259
Thu 11/197:05 am -
1 stop4h 32m
Mon 11/235:00 pm -
1 stop4h 42m
Deal found 9/3$263
Fri 9/256:00 am -
1 stop5h 30m
Mon 9/287:17 pm -
1 stop4h 42m
Deal found 9/1$264

Find flight deals from Louisville to Dulles Intl

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$227
(Delta)

One-way from

$146
(Kiwi.com)

Popular in

February

Cheapest in

October

Average price

$289

Good round-trip deal

$303 or less

Good one-way deal

$192 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 ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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

 
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 Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Fri 11/6

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$184

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Mon 10/19

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$213

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Wed 11/25

9:55 am-11:33 am

Nonstop1h 38m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$213

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Sun 10/11

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$213

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Sat 11/21

10:49 am-4:18 pm

1 stop5h 29m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$223

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Mon 10/5

6:16 pm-10:52 pm

1 stop4h 36m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$223

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Sat 12/5

7:00 am-11:43 am

1 stop4h 43m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$223

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Wed 10/7

6:00 am-7:35 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Mon 10/12

8:35 am-10:18 am

Nonstop1h 43m

$233

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Fri 10/2

7:55 pm-12:41 am

1 stop4h 46m

Washington, D.C. Dulles Intl

Wed 10/7

6:05 am-9:59 am

1 stop3h 54m

$237

LouisvilleWashington, D.C.

SDF Louisville Intl - IAD Washington, D.C. Dulles Intl

SDFIAD

Louisville Intl

Sat 11/21

2:11 pm-3:49 pm

Nonstop1h 38m

Washington, D.C. Dulles Intl

Wed 12/31

12:00 am-12:00 am

Nonstop0h 00m

$248

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/31

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

Compare providers for flights from Louisville to Dulles Intl

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 September.
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 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

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, October is the cheapest month in which you can book a flight from Louisville to Washington, D.C. Dulles Intl Airport (average of $259). 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?

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 $249 and $319 in October.
The cheapest round-trip price found within the last 5 days was $227 on Delta (Oct 17-Oct 20).

The best insider tips for Louisville to Washington, D.C. Dulles Intl Airport flights

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 a feel of what it's like to fly with 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.
United Airlines
7.4
Good
10,169 reviews

Food

6.7

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
10,169 reviews
United Airlines
7.4
Good
10,169 reviews

Food

6.7

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

Related info for your journey

  • 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 1 airline has 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 11m. 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 is the cheapest airline to fly 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. 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: Air Canada (97%), Copa Airlines (96%), Republic Airways( 94%).

  • 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 $146. While the most popular route (Louisville Intl - Washington, D.C. Dulles Intl) can be booked for $207 on average, our data indicates $1,952 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, October is the cheapest month in which you can book a flight from Louisville to Washington, D.C. Dulles Intl Airport (average of $259). 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
Owings Mills
Arlington
Tysons
Lanham
Reston
Herndon
Rockville
Chantilly
Hyattsville
Fredericksburg
Woodbridge
Falls Church
Sterling
Hanover
Laurel
Oxon Hill
Clinton
Hunt Valley
Silver Spring

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Louisville to Dulles Intl

AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$189Average$297FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.