HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$90+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
SDF — IAD
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
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 November or December, booked 19 days in advance, depart on a Friday or Thursday and return on a Saturday

Cheap 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 28, 2025.

Round-trip from

$189
(United Airlines)

One-way from

$90
(United Airlines)

Popular in

April

Cheapest in

November

Average price

$276

Good round-trip deal

$318 or less

Good one-way deal

$189 or less
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. 9% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
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

Find 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 28, 2025.

This United Airlines deal was found by Cheapflights users on 7/28. 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 8/259:55 amSDF - IAD
Nonstop1h 41mUnited Airlines
Mon 9/17:15 pmIAD - SDF
Nonstop1h 47mUnited Airlines
Deal found 7/28$189
This Delta deal was found by Cheapflights users on 7/28. 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 9/205:56 pmSDF - IAD
1 stop5h 21mDelta
Tue 9/237:20 amIAD - SDF
1 stop4h 23mDelta
Deal found 7/28$197
This American Airlines deal was found by Cheapflights users on 7/28. 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.
Tue 8/125:01 pmSDF - IAD
1 stop5h 55mAmerican Airlines
Tue 8/1910:25 amIAD - SDF
1 stop3h 58mAmerican Airlines
Deal found 7/28$260

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 28, 2025.
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

Louisville

Fly to

Dulles Intl

Route

Depart

Return

Price

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Mon 8/25

9:55 am-11:36 am

Nonstop1h 41m

Washington, D.C. Dulles Intl

Mon 9/1

7:15 pm-9:02 pm

Nonstop1h 47m

$189

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sat 9/20

5:56 pm-11:17 pm

1 stop5h 21m

Washington, D.C. Dulles Intl

Tue 9/23

7:20 am-11:43 am

1 stop4h 23m

$197

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Tue 8/12

5:01 pm-10:56 pm

1 stop5h 55m

Washington, D.C. Dulles Intl

Tue 8/19

10:25 am-2:23 pm

1 stop3h 58m

$260

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sat 8/30

1:00 pm-2:41 pm

Nonstop1h 41m

$90

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 9/10

7:14 pm-11:25 pm

1 stop4h 11m

$99

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Fri 10/31

8:18 am-1:46 pm

1 stop5h 28m

$130

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 10/30

8:40 pm-12:52 pm

2 stops16h 12m

$136

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Sun 8/17

9:21 pm-2:23 pm

2 stops17h 02m

$143

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

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

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Louisville to Washington, D.C. Dulles Intl Airport trip
Airlines
Lufthansa

Lufthansa Economy Flex includes preferred seating and allows same-day flight changes.


Lufthansa offers a Free Neighbor Seat option for extra space on long-haul flights.

Read more about Lufthansaby Blane Bachelor
United Airlines

Basic Economy on United allows no carry-on bags, only a personal item under the seat.


United Economy Plus offers extra legroom seats towards the front of the economy cabin.

Read more about United Airlinesby Harriet Baskas
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on Lufthansa

Blane Bachelor

Blane Bachelor

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 Baskas

Harriet Baskas

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

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 July 25, 2025.

Booking 19 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, August is the cheapest month in which you can book a flight from Louisville to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Louisville to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 28, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 80% on flights from Louisville to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the afternoon.

Weekly flight availability from Louisville to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Louisville to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 28, 2025.

The most flights from SDF to IAD are scheduled on a Monday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (7 on average).

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 28, 2025.
Get a feel of what it's like to fly with Delta, United Airlines, and American 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
8.0
Very good
7,975 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,975 reviews
Delta
8.0
Very good
7,975 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,892 reviews
Delta
8.0
Very good
7,975 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,975 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Allegiant Air
7.2
Good
702 reviews
Delta
8.0
Very good
7,975 reviews

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 9 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.

  • 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. Additional options worth looking into are Delta and American Airlines, starting at $197 and $260 round-trip. United Airlines is 37% 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?

    $90 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $99 and $130, 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: Republic Airways (93%), Copa Airlines (93%), Air Canada( 88%).

  • 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 $154. While the most popular route (Louisville Intl - Washington, D.C. Dulles Intl) can be booked for $188 on average our data indicates $910 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, August is the cheapest month in which you can book a flight from Louisville to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Louisville to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Fredericksburg
Gaithersburg
Easton
Towson
Linthicum Heights
Fairfax
Manassas
Falls Church
Waldorf
Laurel
Rockville
Oxon Hill
Springfield
National Harbor
Dundalk

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Louisville to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Nashville to Reagan-National flights
Cincinnati to Baltimore flights
Cincinnati to Reagan-National flights
Nashville to Baltimore flights
Nashville to Dulles Intl flights
Cincinnati to Dulles Intl flights
Louisville to Reagan-National flights
Louisville to Baltimore flights
Knoxville to Dulles Intl flights
Knoxville to Reagan-National flights
Lexington to Dulles Intl flights
Knoxville to Baltimore flights
Lexington to Reagan-National flights
Lexington to Baltimore flights
Blountville to Baltimore flights
Blountville to Dulles Intl flights
Blountville to Reagan-National flights
Evansville to Reagan-National flights
Evansville to Dulles Intl flights
Evansville to Baltimore flights
Owensboro to Reagan-National flights

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 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$189Average$293FlexibilityNo cancel feeOn-time69%
DeltaCheapest$208Average$228FlexibilityNo cancel feeOn-timeN/A

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.