SDF - IAD

$94 Find Cheap Flights from Louisville to Washington Dulles Airport - Compare and Save

1 adult
1 adult, Economy, 0 bags

Save 21% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$226
Typical prices: $249-$367
United Airlines
Tue 10/30Sat 11/3
SDF - IAD • Non-stop
Cheapest one-way
$94
Typical prices: $243-$391
Multiple Airlines
Fri 11/16
SDF - IAD • 2 stops
Nonstop flights
Every day
You can fly direct with United Airlines. Average duration is 1h 38m
Direct flights
+1
Direct flights
+1
When to book
22 weeks
in advance
Our data shows that travelers who book at least 22 weeks in advance save around 43% compared to booking last minute.
Insights
Insights
When to travel
April
Cheapest • 12% price drop
December
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Fort Lauderdale (FLL)
Cheapest • Avg $195 (round-trip)
Detroit Metropolitan Wayne County (DTW)
Shortest trip • 4h 14m (one-way)
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Washington, D.C. Dulles Intl Airport!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Louisville to Dulles Intl (SDF-IAD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Dulles Intl

Fri, Oct 30 - Tue, Nov 3
United Airlines Logo
9:55 am - 11:33 amSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
1h 38mnonstop
United Airlines Logo
5:35 pm - 7:30 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
1h 55mnonstop
$226United Airlines
Thu, Oct 22 - Fri, Oct 30
United Airlines Logo
6:00 am - 7:35 amSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
1h 35mnonstop
United Airlines Logo
5:35 pm - 7:30 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
1h 55mnonstop
$226United Airlines
Fri, Oct 16 - Mon, Oct 19
United Airlines Logo
6:00 am - 7:35 amSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
1h 35mnonstop
United Airlines Logo
8:35 am - 10:18 amIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
1h 43mnonstop
$226United Airlines
Wed, Nov 4 - Sat, Nov 7
Delta Logo
11:06 am - 5:10 pmSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
6h 04m1 stop Atlanta Hartsfield-Jackson
Delta Logo
3:03 pm - 7:10 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
4h 07m1 stop Atlanta Hartsfield-Jackson
$227Delta
Sat, Oct 17 - Tue, Oct 20
Delta Logo
5:33 pm - 11:16 pmSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
5h 43m1 stop Detroit Metropolitan Wayne County
Delta Logo
6:12 pm - 11:59 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
5h 47m1 stop Atlanta Hartsfield-Jackson
$227Delta
Sat, Nov 14 - Tue, Nov 17
Delta Logo
5:40 pm - 11:21 pmSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
5h 41m1 stop Detroit Metropolitan Wayne County
Delta Logo
10:11 am - 2:15 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
4h 04m1 stop Atlanta Hartsfield-Jackson
$227Delta
Sat, Nov 14 - Mon, Nov 16
Delta Logo
6:00 am - 9:59 amSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
3h 59m1 stop Atlanta Hartsfield-Jackson
Delta Logo
3:00 pm - 8:54 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
5h 54m1 stop Atlanta Hartsfield-Jackson
$227Delta
Thu, Oct 29 - Mon, Nov 2
Delta Logo
11:06 am - 5:10 pmSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
6h 04m1 stop Atlanta Hartsfield-Jackson
Delta Logo
5:13 pm - 9:13 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
4h 00m1 stop Detroit Metropolitan Wayne County
$227Delta
Sat, Dec 5 - Wed, Dec 30
Delta Logo
3:12 pm - 8:11 pmSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
4h 59m1 stop Atlanta Hartsfield-Jackson
Delta Logo
5:29 pm - 9:23 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
3h 54m1 stop Detroit Metropolitan Wayne County
$227Delta
Tue, Dec 8 - Tue, Dec 29
Delta Logo
8:05 am - 2:01 pmSDF  Louisville Intl-IAD Washington, D.C. Dulles Intl
5h 56m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:36 pm - 5:34 pmIAD  Washington, D.C. Dulles Intl-SDF Louisville Intl
4h 58m1 stop Detroit Metropolitan Wayne County
$227Delta
Booking Insights

Price, demand and travel trends for Louisville to Washington, D.C. Dulles Intl Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Louisville to Washington, D.C. Dulles Intl Airport?

Round-trip flights from Louisville to Washington, D.C. Dulles Intl Airport typically range from $249 to $367. The lowest price found in the past 5 days was $226, on United Airlines.

What's the cheapest day of the week to fly from Louisville to Washington, D.C. Dulles Intl Airport?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Louisville to Washington, D.C. Dulles Intl Airport. It’s 9% cheaper than the average day, while Sunday is the most expensive, with prices 49% higher.

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

•April is the cheapest month to fly from Louisville to Washington, D.C. Dulles Intl Airport at $254 round-trip.
•June ($383) and January ($322) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 50% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

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

Flights from Louisville to Washington, D.C. Dulles Intl Airport are cheapest 22 weeks before departure. Booking in this window typically costs about 43% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Find deals
Expert advice

Expert advice for your flight from Louisville to Dulles Intl

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more

Key details for Louisville to Washington, D.C. Dulles Intl Airport flights

Low season

March

Cheapest flight

$94
Beat the crowds with an average 19% drop in travelers.
The most popular month to fly with an average 36% increase in travelers.
One-way flight from Louisville to Washington, D.C. Dulles Intl Airport

When to book flights from Louisville to Dulles Intl

Are your dates flexible? Find out the best times to travel from Louisville to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Louisville to Washington, D.C. Dulles Intl Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Louisville to Washington, D.C. Dulles Intl Airport?

    These are the earliest and latest flight times available from Louisville to Washington, D.C. Dulles Intl Airport:

    • Earliest: departs at 6:00 am and lands at 7:38 am
    • Latest: departs at 2:40 pm and lands at 4:18 pm.

    The flight takes about 1h 38m.

  • What cabin classes can I book on flights from Louisville to Washington, D.C. Dulles Intl Airport?

    Two cabin classes are available on flights from Louisville to Washington, D.C. Dulles Intl Airport:

    • Economy Class
    • First Class

  • How long is a flight from Louisville to Washington, D.C. Dulles Intl Airport?

    A nonstop flight from Louisville to Washington, D.C. Dulles Intl Airport takes 1h 38m, covering 450 miles.

  • Do I need a passport to fly from Louisville to Washington, D.C. Dulles Intl Airport?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Louisville to Washington, D.C. Dulles Intl Airport flight?

    Round-trip flights from Louisville to Washington, D.C. Dulles Intl Airport range from $249 to $367, with an average of $290 over the past 12 months. Anything below $249 counts as a good deal.

  • How expensive are last-minute Louisville to Washington, D.C. Dulles Intl Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 25% above the $290 route average. Book 22 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Louisville to Washington, D.C. Dulles Intl Airport?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $195 round-trip via Fort Lauderdale (FLL), compared to $289 for nonstop.

  • What is the standard checked-bag allowance on flights from Louisville to Washington, D.C. Dulles Intl Airport?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$80 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Louisville to Washington, D.C. Dulles Intl Airport?

    The Embraer 175 (Enhanced Winglets) family is used most often on this route, operated mainly by United Airlines. Other aircraft seen on the route include Embraer 175 variants.

  • How are flight departures from Louisville to Washington, D.C. Dulles Intl Airport spread across the day?

    Morning is the busiest departure period on Louisville to Washington, D.C. Dulles Intl Airport flights, with 50% of flights leaving in that window. Afternoon departures account for 50%, evening flights for 0%, and night flights for 0%.

  • Have flight prices from Louisville to Washington, D.C. Dulles Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $226 to $1,040. That means the highest observed fare was about 5x higher than the lowest one.

  • How are flight prices from Louisville to Washington, D.C. Dulles Intl Airport looking right now?

    One-way fares from Louisville to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $141, which is 58% below the typical average for this route.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:

    • Dollar
    • Budget
    • Hertz
    • Sixt
    • Thrifty

  • Which airports can I use when flying from Louisville to Washington, D.C. Dulles Intl Airport?

    Flights from Louisville to Washington, D.C. Dulles Intl Airport usually depart from Louisville Intl (SDF) and arrive at Washington, D.C. Dulles Intl (IAD).

  • Which airports do connecting flights from Louisville to Washington, D.C. Dulles Intl Airport pass through?

    One-stop flights from Louisville to Washington, D.C. Dulles Intl Airport most commonly connect through:

    • Charlotte Douglas (CLT) - 40% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) - 30% of one-stop connections
    • Atlanta Hartsfield-Jackson (ATL) - 25% of one-stop connections
    • Fort Lauderdale (FLL) - 5% of one-stop connections

  • Can I save money by using flexible dates for flights from Louisville to Washington, D.C. Dulles Intl Airport?

    Yes. Flexible dates can save you up to 40% on flights from Louisville to Washington, D.C. Dulles Intl Airport. Wednesday is the cheapest departure day at $264 round-trip on average, while Sunday is the most expensive at $433, a difference of $169.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from Louisville to Washington, D.C. Dulles Intl Airport?

    Only United Airlines operates flights between Louisville and Washington, D.C. Dulles Intl Airport.

  • How much time can I save by choosing a different layover airport from Louisville to Washington, D.C. Dulles Intl Airport?

    Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 4h 14m, compared with 4h 21m via Charlotte Douglas (CLT) and 5h 21m via Atlanta Hartsfield-Jackson (ATL).

  • What popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Louisville to Washington, D.C. Dulles Intl Airport flights?

    Among airlines operating Louisville to Washington, D.C. Dulles Intl Airport flights:

    • United Airlines: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Louisville to Washington, D.C. Dulles Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • United Airlines: a cabin bag and a checked bag in First Class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

Your guide to booking Louisville to Washington, D.C. Dulles Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Sunday. On this route, Wednesday flights average $264, about $169 less than Sunday fares (39% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 22 weeks before you fly. On this route, that window historically saves about 43% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Louisville to Washington, D.C. Dulles Intl Airport trip for April. Fares historically average $254 round-trip in that month - typically $129 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Fort Lauderdale Airport (FLL) can be cheaper than flying direct. The cheapest layover option averages $195 round-trip on this route - about $93 less than direct flights (based on the last 12 months).

Prefer to fly direct from Louisville to Washington Dulles Airport?

 
Find which airlines fly direct from Louisville Intl Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Louisville Intl to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to Louisville Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

More options for your flight from Louisville to Dulles Intl

Complete your trip to Washington, D.C. with a hotel stay or car rental

Car rentals in Washington, D.C.
Hotels in Washington, D.C.
Vacations in Washington, D.C.