What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Louisville Intl?

United Airlines is the most popular carrier operating from Washington, D.C. Dulles Intl to Louisville Intl

What airlines fly to Louisville?

United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Louisville from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 88% of people opting to fly with this airline when traveling to Louisville. Keep in mind that there are 4 different airlines that fly to Louisville on a routine basis, so you have a few additional options to choose from.

What documentation or ID do you need to fly to Louisville Intl Airport?

The travel and health documents required for your trip to Louisville Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Louisville Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$137 Cheap Flights from Washington, D.C. Dulles Intl Airport to Louisville in 2026

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to Louisville on average per day?

As of February 2026, 4 flights take off from Washington, D.C. Dulles Intl Airport and land in Louisville each day. The most common flight departure time for this route is 5:00PM, with 100% of daily flights taking off in the afternoon.

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to Louisville on average per week?

As of February 2026, there are 34 flights per week flying from Washington, D.C. Dulles Intl Airport to Louisville. The most common day of the week flights depart is Mon, with 15% of flights taking off on this day.

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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Louisville

Round-trip

One-way

Last minute

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Cheap round-trip flights

Enter your travel dates to find the best prices.

5:45 pm - 7:42 pm

IAD

SDF

1h 57mnonstop

9:55 am - 11:35 am

SDF

IAD

1h 40mnonstop

$189United Airlines

Thu, Apr 16 - Sun, Apr 19

12:50 pm - 2:47 pm

IAD

SDF

1h 57mnonstop

2:30 pm - 4:10 pm

SDF

IAD

1h 40mnonstop

$204United Airlines

Sat, Apr 25 - Wed, Apr 29

6:08 am - 10:19 am

IAD

SDF

4h 11m

1 stop

6:00 am - 12:10 pm

SDF

IAD

6h 10m

1 stop

$209Delta

Sun, May 24 - Sat, May 30

5:43 pm - 7:42 pm

IAD

SDF

1h 59mnonstop

9:55 am - 11:38 am

SDF

IAD

1h 43mnonstop

$213United Airlines

Sat, Mar 7 - Sat, Mar 14

5:43 pm - 7:42 pm

IAD

SDF

1h 59mnonstop

9:55 am - 11:38 am

SDF

IAD

1h 43mnonstop

$214United Airlines

Fri, Mar 20 - Mon, Mar 23

8:31 am - 10:23 am

IAD

SDF

1h 52mnonstop

6:00 am - 7:35 am

SDF

IAD

1h 35mnonstop

$216United Airlines

Mon, May 25 - Sat, May 30

12:50 pm - 2:47 pm

IAD

SDF

1h 57mnonstop

2:35 pm - 4:13 pm

SDF

IAD

1h 38mnonstop

$219United Airlines

Fri, Mar 6 - Sun, Mar 8

6:20 am - 6:58 pm

IAD

SDF

12h 38m

2 stops

8:31 pm - 7:27 am

SDF

IAD

10h 56m

1 stop

$221Multiple Airlines

Mon, May 11 - Sat, May 16

6:00 am - 11:27 am

IAD

SDF

5h 27m

1 stop

5:55 pm - 10:59 pm

SDF

IAD

5h 04m

1 stop

$224Delta

Sat, Mar 7 - Tue, Mar 10

5:45 pm - 7:42 pm

IAD

SDF

1h 57mnonstop

5:50 am - 7:30 am

SDF

IAD

1h 40mnonstop

$229United Airlines

Fri, May 8 - Sun, May 10

United Airlines flights from Washington, D.C. Dulles Intl Airport to Louisville

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to Louisville flight tickets

United Airlines

Apr 16

IAD5:45 pmWashington, D.C. Dulles Intl

1h 57m

SDF7:42 pmLouisville Intl

Apr 20

SDF2:30 pmLouisville Intl

1h 40m

IAD4:10 pmWashington, D.C. Dulles Intl

$189

United Airlines

Apr 25

IAD12:50 pmWashington, D.C. Dulles Intl

1h 57m

SDF2:47 pmLouisville Intl

Apr 29

SDF2:30 pmLouisville Intl

1h 40m

IAD4:10 pmWashington, D.C. Dulles Intl

$204

United Airlines

Mar 7

IAD5:43 pmWashington, D.C. Dulles Intl

1h 59m

SDF7:42 pmLouisville Intl

Mar 14

SDF9:55 amLouisville Intl

1h 43m

IAD11:38 amWashington, D.C. Dulles Intl

$213

Allegiant Air flights from Washington, D.C. Dulles Intl Airport to Louisville

Our best Allegiant Air deals on Washington, D.C. Dulles Intl Airport to Louisville flight tickets

Allegiant Air

May 28

IAD6:18 pmWashington, D.C. Dulles Intl

14h 10m

1 stop

SDF8:28 amLouisville Intl

May 31

SDF9:08 amLouisville Intl

8h 20m

1 stop

IAD5:28 pmWashington, D.C. Dulles Intl

$257

Allegiant Air

Mar 1

IAD4:36 pmWashington, D.C. Dulles Intl

17h 39m

1 stop

SDF10:15 amLouisville Intl

Mar 5

SDF3:53 pmLouisville Intl

16h 29m

1 stop

IAD8:22 amWashington, D.C. Dulles Intl

$428

momondo Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Louisville that are best for you.

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Fly to

Route

Depart

Return

Price

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Thu 4/16

5:45 pm-7:42 pm

Nonstop1h 57m

Louisville Intl

Sun 4/19

9:55 am-11:35 am

Nonstop1h 40m

$189

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 4/25

12:50 pm-2:47 pm

Nonstop1h 57m

Louisville Intl

Wed 4/29

2:30 pm-4:10 pm

Nonstop1h 40m

$204

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sun 5/24

6:08 am-10:19 am

1 stop4h 11m

Louisville Intl

Sat 5/30

6:00 am-12:10 pm

1 stop6h 10m

$209

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 3/7

5:43 pm-7:42 pm

Nonstop1h 59m

Louisville Intl

Sat 3/14

9:55 am-11:38 am

Nonstop1h 43m

$213

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Fri 3/20

5:43 pm-7:42 pm

Nonstop1h 59m

Louisville Intl

Mon 3/23

9:55 am-11:38 am

Nonstop1h 43m

$214

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Mon 5/25

8:31 am-10:23 am

Nonstop1h 52m

Louisville Intl

Sat 5/30

6:00 am-7:35 am

Nonstop1h 35m

$216

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Fri 3/6

12:50 pm-2:47 pm

Nonstop1h 57m

Louisville Intl

Sun 3/8

2:35 pm-4:13 pm

Nonstop1h 38m

$219

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Mon 5/11

6:20 am-6:58 pm

2 stops12h 38m

Louisville Intl

Sat 5/16

8:31 pm-7:27 am

1 stop10h 56m

$221

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Sat 3/7

6:00 am-11:27 am

1 stop5h 27m

Louisville Intl

Tue 3/10

5:55 pm-10:59 pm

1 stop5h 04m

$224

Washington, D.C.Louisville

IAD - SDF

IADSDF

Washington, D.C. Dulles Intl

Fri 5/8

5:45 pm-7:42 pm

Nonstop1h 57m

Louisville Intl

Sun 5/10

5:50 am-7:30 am

Nonstop1h 40m

$229

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Louisville

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Louisville?

If you are unable to visit Louisville during the month of January, then departing from Washington, D.C. Dulles Intl Airport during the month July is also very affordable. Most momondo users find prices during this month for around $284.

What is the cheapest day to depart on your flight to Louisville?

On average, the least expensive day to fly to Louisville from Washington, D.C. Dulles Intl Airport is on a Saturday. momondo users have found tickets for Saturday departures for as low as $266. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from Washington, D.C. Dulles Intl Airport to Louisville on a Monday will generally be more expensive and average around $431. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Louisville?

Our data shows that the cheapest Washington, D.C. Dulles Intl Airport to Louisville flights are usually those with departure times in the morning. Our users have found flights to Louisville in the morning for as low as $304. In the evening is when there is more demand to fly to Louisville, so prices are often more expensive at around $314 per ticket.

What is the cheapest Washington, D.C. Dulles Intl to Louisville Intl flight route?

Fly from Washington, D.C. Dulles Intl to Louisville Intl for the best Washington, D.C. Dulles Intl - Louisville Intl flight prices

How far in advance should I book a flight to Louisville?

You are more likely to see cheaper flights to Louisville from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Louisville for around $322 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Louisville from Washington, D.C. Dulles Intl Airport for as low as $222 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to Louisville Intl flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to Louisville Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to Louisville flights?

No. A direct flight is the cheapest option for a flight between Washington, D.C. Dulles Intl Airport to Louisville.

How have Washington, D.C. Dulles Intl Airport to Louisville flight prices changed over time?

As of February 2026, prices for Washington, D.C. Dulles Intl Airport to Louisville flights are approximately 4% cheaper when compared to flights at the same time last year.

When to book flights from Washington, D.C. Dulles Intl Airport to Louisville

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to Louisville according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to Louisville (IAD to SDF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Louisville

Best Price Found	$214
Fastest flight time	1h 39m
Direct flights	Every day
Airports in Louisville	1 airport

The best one-way flight to Louisville from Washington, D.C. Dulles Intl Airport in the past 72 hours is $214. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to Louisville found on momondo in the last 72 hours is $264.

The fastest flight from Washington, D.C. Dulles Intl Airport to Louisville takes 1h 39m

Direct flights go from Washington, D.C. Dulles Intl Airport to Louisville every day.

There is 1 airport in Louisville. From Washington, D.C. Dulles Intl Airport there are direct flights to Louisville Intl (SDF).

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How far is Washington, D.C. Dulles Intl to Louisville Intl by plane?
There are 450.6 mi between Washington, D.C. Dulles Intl and Louisville Intl. A reasonable flight in good conditions will take 1h 39m.
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to Louisville Intl Airport?
Prices for flights from Washington, D.C. Dulles Intl Airport to Louisville Intl Airport are updated daily.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to Louisville Intl Airport?
There are 2 operators available for flights from Washington, D.C. Dulles Intl Airport to Louisville Intl Airport as of February 2026.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Louisville Intl Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Louisville Intl Airport.
What documentation or ID do you need to fly to Louisville Intl Airport?
The travel and health documents required for your trip to Louisville Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Louisville Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Washington, D.C. Dulles Intl Airport to Louisville?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Washington, D.C. Dulles Intl Airport to Louisville is Embraer 175 (Enhanced Winglets) (36.19% of total bookings). The next most popular plane models are Embraer 175 (17.14%), Canadair (Bombardier) Regional Jet 900 (11.11%), and Canadair (Bombardier) Regional Jet 700 (10.16%).
What is the most popular airline from Washington, D.C. Dulles Intl Airport to Louisville?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. Dulles Intl Airport to Louisville is United Airlines (94% of total bookings). The next most popular airline is Delta (6%).

Best airlines flying from Washington, D.C. Dulles Intl Airport to Louisville

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Louisville with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $189	Free Cancellation	Rating 7.4 9,325 reviews		Search United Airlines flights
Delta	PriceFrom $203	Free Cancellation	Rating 7.9 8,215 reviews		Search Delta flights

United Airlines Flights From Washington, D.C. Dulles Intl Airport to Louisville
The lowest priced United Airlines flight from Washington, D.C. Dulles Intl Airport to Louisville from the last 72 hours was $189. Generally, United Airlines has 13 flights on this route every week with an average price of $310. United Airlines is rated 7.4/10 by our users.

French Lick

Elizabethtown

West Baden Springs

Bardstown

Jeffersonville

Shepherdsville

New Albany

Corydon

Elizabeth

Brandenburg

Charlestown

Springfield

Georgetown

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Louisville?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to Louisville for you.

Can I find flights from Washington, D.C. to Louisville with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Louisville from Washington, D.C. with this policy.

How can momondo help me find flights from Washington, D.C. to Louisville?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Louisville from Washington, D.C..

I’m not ready to book a flight from Washington, D.C. to Louisville right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to Louisville now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Louisville and let you know when they change.

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Cheap flights from Washington, D.C. Dulles Intl Airport to Louisville from $108

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United Airlines flights from Washington, D.C. Dulles Intl Airport to Louisville

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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Louisville

What is the cheapest month to fly to Louisville?

What is the cheapest day to depart on your flight to Louisville?

What is the cheapest time of day to depart on your flight to Louisville?

What is the cheapest Washington, D.C. Dulles Intl to Louisville Intl flight route?

How far in advance should I book a flight to Louisville?

What cabin class options are available on Washington, D.C. Dulles Intl to Louisville Intl flights?

Can stopping save me money on Washington, D.C. Dulles Intl Airport to Louisville flights?

How have Washington, D.C. Dulles Intl Airport to Louisville flight prices changed over time?

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Louisville Intl?

What airlines fly to Louisville?

How many flights depart from Washington, D.C. Dulles Intl Airport to Louisville on average per day?

How many flights depart from Washington, D.C. Dulles Intl Airport to Louisville on average per week?

When to book flights from Washington, D.C. Dulles Intl Airport to Louisville

Cheap Washington, D.C. Dulles Intl Airport to Louisville (IAD to SDF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to Louisville

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Best airlines flying from Washington, D.C. Dulles Intl Airport to Louisville

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to Louisville with momondo

United Airlines Flights From Washington, D.C. Dulles Intl Airport to Louisville

Traveling to a place near Louisville?

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Louisville?

Can I find flights from Washington, D.C. to Louisville with flexible booking policies on momondo?

How can momondo help me find flights from Washington, D.C. to Louisville?

I’m not ready to book a flight from Washington, D.C. to Louisville right now. Can momondo alert me if prices change?

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