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 $193 and $251 round-trip. United Airlines is 38% 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?

$79 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 Allegiant Air and Delta, with prices starting from $81 and $89, respectively.

What is the cheapest day to fly from Louisville to Washington, D.C. Dulles Intl Airport?

Travelers seeking maximum savings on their Louisville to Washington, D.C. Dulles Intl Airport flight should consider departing on Friday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 $125. While the most popular route (Louisville Intl - Washington, D.C. Dulles Intl) can be booked for $165 on average our data indicates $2,005 when flying from Louisville to Washington, D.C. Dulles Intl Airport.

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 (95%), Republic Airways (92%), Air Canada( 92%).

What is the cheapest day to fly round-trip from Louisville to Washington, D.C. Dulles Intl Airport?

Tuesday flights are generally found to be more expensive for flights from Louisville to Washington, D.C. Dulles Intl Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C. Dulles Intl Airport.

What is the cheapest month to fly from Louisville to Washington, D.C. Dulles Intl Airport?

July can be a great time to fly to Washington, D.C. Dulles Intl Airport from Louisville with a flight ticket averaging about $259. Cheapflights users have found deals in the month of July for as cheap as $179. The most expensive prices can be found in the month of May.

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 8 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.

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.

$79+ Flights from Louisville to Washington, D.C. Dulles Intl Airport

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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.

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Cheapflights Tip: The best prices from Louisville Intl to Washington, D.C. Dulles Intl are usually found in July or November, booked 19 days in advance, depart on a Friday or Thursday and return on a Saturday

Cheap flight deals from Louisville to Dulles Intl

Round-trip from	$189 (United Airlines)
One-way from	$79 (United Airlines)
Popular in	August
Cheapest in	July
Average price	$310
Good round-trip deal	$440 or less
Good one-way deal	$185 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. 1% potential increase in price ($5 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).

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Average for round-trip flights in June 2025

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Price to beat on a round-trip flight from Louisville Intl to Washington, D.C. Dulles Intl.

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Price to beat on a one-way flight from Louisville Intl to Washington, D.C. Dulles Intl.

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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 June 12, 2025.

Thu 7/1012:20 pmSDF - IAD

Nonstop1h 42mUnited Airlines

Thu 7/178:40 amIAD - SDF

Nonstop1h 47mUnited Airlines

Deal found 6/12

$189

Thu 7/318:14 pmSDF - IAD

1 stop4h 20mDelta

Mon 8/47:36 pmIAD - SDF

1 stop4h 56mDelta

Deal found 6/11

$193

Thu 7/106:53 pmSDF - IAD

2 stops19h 30mMultiple Airlines

Thu 7/173:53 pmIAD - SDF

1 stop21h 43mMultiple Airlines

Deal found 6/12

$240

Wed 9/36:00 amSDF - IAD

1 stop4h 07mAmerican Airlines

Fri 9/512:48 pmIAD - SDF

1 stop4h 00mAmerican Airlines

Deal found 6/11

$251

Best flights from Louisville to Dulles Intl
Discover carefully curated flight deals from Louisville to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated June 12, 2025.

Thu 7/1012:20 pmSDF - IAD

Nonstop1h 42mUnited Airlines

Wed 7/163:30 pmIAD - SDF

Nonstop1h 50mUnited Airlines

Deal found 6/10

$189

Thu 7/318:14 pmSDF - IAD

1 stop4h 20mDelta

Mon 8/47:36 pmIAD - SDF

1 stop4h 56mDelta

Deal found 6/11

$193

Thu 7/106:53 pmSDF - IAD

2 stops19h 30mMultiple Airlines

Thu 7/173:53 pmIAD - SDF

1 stop21h 43mMultiple Airlines

Deal found 6/12

$240

Wed 9/36:00 amSDF - IAD

1 stop4h 07mAmerican Airlines

Fri 9/512:48 pmIAD - SDF

1 stop4h 00mAmerican Airlines

Deal found 6/11

$251

Thu 7/243:10 pmSDF - IAD

2 stops23h 13mAllegiant Air

Mon 7/284:46 pmIAD - SDF

2 stops16h 21mAllegiant Air

Deal found 6/11

$293

Last-minute flights from Louisville to Dulles Intl
Discover last-minute flight deals from Louisville to Dulles Intl. Data last updated June 12, 2025 and is based on user searches.

Thu 6/1910:17 amSDF - IAD

Nonstop1h 38mUnited Airlines

Thu 6/268:40 amIAD - SDF

Nonstop1h 47mUnited Airlines

Deal found 6/12

$224

Thu 6/1910:29 amSDF - IAD

1 stop6h 15mDelta

Thu 6/266:00 amIAD - SDF

1 stop3h 58mDelta

Deal found 6/12

$244

Thu 6/198:11 pmSDF - IAD

1 stop3h 48mAmerican Airlines

Sun 6/225:45 pmIAD - SDF

1 stop6h 14mAmerican Airlines

Deal found 6/10

$394

Fri 6/2012:10 pmSDF - IAD

1 stop23h 39mMultiple Airlines

Sun 6/223:58 pmIAD - SDF

1 stop21h 41mMultiple Airlines

Deal found 6/10

$321

Sat 7/56:05 amSDF - IAD

1 stop4h 32mAmerican Airlines

Sat 7/58:06 pmIAD - SDF

1 stop4h 24mAmerican Airlines

Deal found 6/12

$346

Thu 7/1012:20 pmSDF - IAD

Nonstop1h 42mUnited Airlines

Wed 7/163:30 pmIAD - SDF

Nonstop1h 50mUnited Airlines

Deal found 6/10

$189

Thu 7/106:53 pmSDF - IAD

2 stops19h 30mMultiple Airlines

Thu 7/173:53 pmIAD - SDF

1 stop21h 43mMultiple Airlines

Deal found 6/12

$240

Thu 7/243:10 pmSDF - IAD

2 stops23h 13mAllegiant Air

Mon 7/284:46 pmIAD - SDF

2 stops16h 21mAllegiant Air

Deal found 6/11

$293

Thu 7/318:14 pmSDF - IAD

1 stop4h 20mDelta

Mon 8/47:36 pmIAD - SDF

1 stop4h 56mDelta

Deal found 6/11

$193

One-way flights from Louisville to Dulles Intl
Search for one-way flight options from Louisville to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated June 12, 2025.

Mon 8/412:30 pmSDF - IAD

Nonstop1h 42mUnited Airlines

Deal found 6/10

$79

Thu 8/1411:34 amSDF - IAD

1 stop5h 50mAllegiant Air

Deal found 6/11

$81

Thu 10/237:30 pmSDF - IAD

1 stop4h 37mDelta

Deal found 6/10

$89

Wed 7/309:46 amSDF - IAD

2 stops25h 22mMultiple Airlines

Deal found 6/11

$137

Mon 7/148:02 pmSDF - IAD

1 stop3h 56mAmerican Airlines

Deal found 6/11

$155

Fri 6/2012:10 pmSDF - IAD

1 stop23h 39mSun Country Air

Deal found 6/10

$208

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

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 7/10

12:20 pm-2:02 pm

Nonstop1h 42m

Washington, D.C. Dulles Intl

Wed 7/16

3:30 pm-5:20 pm

Nonstop1h 50m

$189

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 7/31

8:14 pm-12:34 am

1 stop4h 20m

Washington, D.C. Dulles Intl

Mon 8/4

10:14 am-2:16 pm

1 stop4h 02m

$193

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 7/10

6:53 pm-2:23 pm

2 stops19h 30m

Washington, D.C. Dulles Intl

Thu 7/17

3:53 pm-1:36 pm

1 stop21h 43m

$240

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 9/3

6:00 am-10:07 am

1 stop4h 07m

Washington, D.C. Dulles Intl

Fri 9/5

12:48 pm-4:48 pm

1 stop4h 00m

$251

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 7/24

3:10 pm-2:23 pm

2 stops23h 13m

Washington, D.C. Dulles Intl

Mon 7/28

4:46 pm-9:07 am

2 stops16h 21m

$293

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Mon 8/18

12:30 pm-2:12 pm

Nonstop1h 42m

$79

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Thu 8/14

11:34 am-5:24 pm

1 stop5h 50m

$81

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 9/17

8:20 am-1:57 pm

1 stop5h 37m

$89

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Fri 8/29

8:06 pm-11:52 pm

1 stop3h 46m

$126

LouisvilleWashington, D.C.

SDF - IAD

SDFIAD

Louisville Intl

Wed 7/30

9:46 am-11:08 am

2 stops25h 22m

$137

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 11 results

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

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

Expert on Lufthansa

Harriet Baskas

Expert on United Airlines

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 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 July is currently the most expensive (average of $349). 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?

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

The most flights from SDF to IAD are scheduled on a Monday (9 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Dulles Intl by month

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Dulles Intl

To help decide which airline to fly from Louisville to Washington, D.C., see what other customers have to say about Delta, United Airlines and Allegiant Air. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,950 reviews

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

7,950 reviews

Delta

8.0

Very good

7,950 reviews

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

8,790 reviews

Delta

8.0

Very good

7,950 reviews

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

7.3

Good

725 reviews

Delta

8.0

Very good

7,950 reviews

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

7,950 reviews

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!

Sun Country Air

6.9

Okay

345 reviews

Delta

8.0

Very good

7,950 reviews

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

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 8 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 $193 and $251 round-trip. United Airlines is 38% 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?
$79 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 Allegiant Air and Delta, with prices starting from $81 and $89, 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: Copa Airlines (95%), Republic Airways (92%), Air Canada( 92%).
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 $125. While the most popular route (Louisville Intl - Washington, D.C. Dulles Intl) can be booked for $165 on average our data indicates $2,005 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 July is currently the most expensive (average of $349). 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

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Top 2 airlines flying from Louisville to Dulles Intl

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$191	Average$300	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$208	Average$228	FlexibilityNo cancel fee	On-timeN/A

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$79+ 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 8/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Louisville to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Louisville Intl to Washington, D.C. Dulles Intl are usually found in July or November, booked 19 days in advance, depart on a Friday or Thursday and return on a Saturday

Cheap flight deals from Louisville to Dulles Intl

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Louisville to Dulles Intl

Cheapest flights from Louisville to Dulles IntlExplore 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 June 12, 2025.

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 June 12, 2025.

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.

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

Airlines

Lufthansa

United Airlines

Our travel experts

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.

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 June 9, 2025.

What is the cheapest month to book a flight from Louisville to Washington, D.C. Dulles Intl Airport?

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 June 12, 2025.

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

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

Reviews of airlines servicing Dulles Intl

To help decide which airline to fly from Louisville to Washington, D.C., see what other customers have to say about Delta, United Airlines and Allegiant Air. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

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?

What are the cheapest airlines flying from Louisville to Washington, D.C. Dulles Intl Airport round-trip?

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

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

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

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

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

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

What is the cheapest month to book a flight from Louisville to Washington, D.C. Dulles Intl Airport?

Traveling to a place near Louisville?

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Top 2 airlines flying from Louisville to Dulles Intl

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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 June 12, 2025.