SDF - IAD

$104 Find Cheap Flights from Louisville to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Louisville to Dulles Intl departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Louisville to Washington, D.C., as well as popular online travel agencies
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$189
Overall average: $345
United Airlines
Tue 2/24Tue 3/3
SDF - IAD • Non-stop
Cheapest one-way
$104
Typical prices: $258-$312
Multiple Airlines
Wed 2/18
SDF - IAD • 1 stop
Our travelers' advice
AI-powered summary based on content written by travel experts. AI can make mistakes.
United's Economy Plus offers extra legroom for comfort.
United's Priority Boarding helps secure carry-on space.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
United Airlines
Cheapest • from $189 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
3 weeks
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 16% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 17% price drop
January
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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 Dulles Intl!
Flight Deals
Booking Insights
Expert advice
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Louisville to Dulles Intl that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Louisville to Dulles Intl

Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
9:50 am - 11:33 am
SDF
-
IAD
1h 43mnonstop
United Airlines Logo
12:50 pm - 2:47 pm
IAD
-
SDF
1h 57mnonstop
$189United Airlines
Thu, Mar 26 - Tue, Apr 7
United Airlines Logo
2:35 pm - 4:13 pm
SDF
-
IAD
1h 38mnonstop
United Airlines Logo
12:50 pm - 2:47 pm
IAD
-
SDF
1h 57mnonstop
$196United Airlines
Sat, Feb 14 - Wed, Feb 18
United Airlines Logo
9:50 am - 11:33 am
SDF
-
IAD
1h 43mnonstop
United Airlines Logo
5:43 pm - 7:42 pm
IAD
-
SDF
1h 59mnonstop
$204United Airlines
Fri, Mar 6 - Sun, Mar 8
Delta Logo
7:51 pm - 12:21 am
SDF
-
IAD
4h 30m
1 stop
Delta Logo
7:20 am - 11:58 am
IAD
-
SDF
4h 38m
1 stop
$209Delta
Sat, Feb 28 - Sun, Mar 1
United Airlines Logo
9:50 am - 11:33 am
SDF
-
IAD
1h 43mnonstop
United Airlines Logo
12:50 pm - 2:47 pm
IAD
-
SDF
1h 57mnonstop
$233United Airlines
Sun, Mar 29 - Sat, Apr 4
Delta Logo
7:45 am - 11:32 am
SDF
-
IAD
3h 47m
1 stop
Delta Logo
6:00 am - 9:53 am
IAD
-
SDF
3h 53m
1 stop
$234Delta
Fri, Feb 27 - Sun, Mar 1
United Airlines Logo
9:50 am - 11:33 am
SDF
-
IAD
1h 43mnonstop
United Airlines Logo
12:50 pm - 2:47 pm
IAD
-
SDF
1h 57mnonstop
$249United Airlines
Fri, Feb 13 - Sun, Feb 15
Delta Logo
7:51 pm - 12:21 am
SDF
-
IAD
4h 30m
1 stop
Delta Logo
6:00 am - 10:04 am
IAD
-
SDF
4h 04m
1 stop
$254Delta
Fri, Mar 13 - Mon, Mar 16
Delta Logo
5:35 pm - 12:27 am
SDF
-
IAD
6h 52m
1 stop
Delta Logo
3:35 pm - 10:43 pm
IAD
-
SDF
7h 08m
1 stop
$262Delta
Fri, Feb 20 - Sun, Feb 22
Delta Logo
7:51 pm - 12:21 am
SDF
-
IAD
4h 30m
1 stop
Delta Logo
6:00 am - 10:04 am
IAD
-
SDF
4h 04m
1 stop
$264Delta
Booking Insights

KAYAK's insights & trends for Louisville to Dulles Intl flights

Get data-powered insights and trends into flights from Louisville to Dulles Intl to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Louisville to Washington Dulles Airport?

The average price of all round-trip flights from Louisville to Washington, D.C. Dulles Intl Airport clicked on KAYAK for each day over the last 12 months.

When flying from Louisville to Washington Dulles Airport, you should consider leaving on a Friday and avoid Tuesdays if you are looking for the best rates. For your return to Louisville, you’ll find the best rates on Saturdays and the most expensive ones on Sundays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Louisville to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Louisville to Washington, D.C. Dulles Intl Airport is July, where tickets cost $249 (return) on average. On the other hand, the most expensive months are February and April, where the average cost of round-trip tickets is $345 and $334 respectively.

How far in advance should I book a flight from Louisville to Washington, D.C. Dulles Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Louisville to Washington, D.C. Dulles Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Louisville to Washington, D.C. Dulles Intl Airport, you should book around 3 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 20 weeks before departure.

Expert advice

Expert advice for your flight from Louisville to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
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.

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.

Good to know

Low seasonApril
Cheapest flight$104
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly with an average 6% increase in price.
Flight from Louisville to Washington Dulles 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
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Louisville to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from Louisville to Washington, D.C. Dulles Intl Airport was $104 for a one-way ticket and $189 for a round-trip.

  • Do I need a passport to fly between Louisville and Washington Dulles Airport?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from Louisville to Washington Dulles Airport?

    On your way to Washington Dulles Airport, you’ll fly out from Louisville Intl. You’ll be landing at Washington, D.C. Dulles Intl.

  • Which airlines offer Wi-Fi service onboard planes from Louisville to Washington Dulles Airport?

    American Airlines, Delta, and JetBlue offer inflight Wi-Fi service on the Louisville to Washington Dulles Airport flight route.

  • Which aircraft models fly most regularly from Louisville to Washington Dulles Airport?

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Louisville to Washington Dulles Airport flight route.

  • Which airline alliances offer flights from Louisville to Washington Dulles Airport?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Louisville and Washington Dulles Airport, with SkyTeam being the most commonly used for this route.

  • On which days can I fly direct from Louisville to Washington Dulles Airport?

    There are nonstop flights from Louisville to Washington Dulles Airport on a daily basis.

  • Which is the best airline for flights from Louisville to Washington, D.C., Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Louisville to Washington, D.C. are Delta and United Airlines. With an average price for the route of $268 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $289 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Louisville to Washington Dulles Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Louisville to Washington Dulles Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Louisville to Washington Dulles Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from Louisville is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Louisville to Washington Dulles Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington Dulles Airport with an airline and back to Louisville with another airline. Booking your flights between Louisville and IAD can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Louisville to Washington Dulles Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington Dulles Airport from Louisville up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Louisville to Washington, D.C. Dulles Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $234 or less one-way and $368 or less round-trip.

Prefer to fly direct from Louisville to Washington Dulles Airport?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Louisville Intl to Washington, D.C. Dulles Intl.
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

Reviews of the top airlines flying from Louisville to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from Louisville to Washington, D.C.. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Louisville to Dulles Intl? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8124 reviews
7.2Food
8.5Crew
7.8Entertainment
7.9Comfort
8.1Boarding
Airline reviews

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

10.0 ExcellentZebrina, Jan 2026
LGA - CAE
Read more Delta reviews

It was last minute due to weather - considering - it was amazing! Good smiles, friendly staff and they were making sure we knew what was going on when and where.

delta last minute gave me a boarding pass for a different flight with no confirmation that they were changing it

The service from the flight attendants were of supreme quality. They greeted and treated everyone with a wide smile. This is totally absent nowadays. Kudos to them!!!!

Excellent flight and got us around tough weather. Only issue was seat TV did not work and crew tried to reboot.

Very large passenger too space from my own seat. Arm board couldn’t be lowered because of his size. It wads very uncomfortable trip, as the flight was full couldn’t move anywhere having back pain because of the position in which I was the entire flight.

was sitting in the jet bridge for 10 minutes in -20 degree weather waiting for my bag

Outdated equipment in disrepair, wifi inoperable. Broken seats, taped air vents, generally poor condition, the 717 showed its age and lack of upkeep.

My flight out of Baton Rouge to Atlanta was delayed by a half hour. This got us into Atlanta airport 30 minutes late. I ran through the airport to get to my connecting flight. As I approached the boarding gate, I saw the boarding door was still open and a passenger was being checked in. But when I got to the gate, the boarding agent told me they had already given away my seat and there were no empty seats on that flight. So I had to take a later flight. That has never happened to me before. Very frustrating.

Connection through Atlanta was difficult. Mechanical issue on plane caused a two hour delay. New gate was a mile away.

No WiFi. Comfort plus should have alcohol provided, crew only offered water or tea. Who the heck wants tea?

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

It was great. There were some issues prior to takeoff. The weather was poor so we had to go through deicing, and we were delayed a bit by the pilots' concern about one of the engines, but that's aviation. The pilots handled everything with aplomb, and kept us apprised

The seats were comfortable and we had leg room. Great entertainment.

The flight crew where really good. Better then the crew from BNE to SFO

Safe made to destination. Late to start at GVA for icy reasons but we fought our next fly.

Miserable. They moved my seat, but canceled the next leg of my flight. I resolved the issue at my transfer, but that resulted in lost luggage that has taken days off my schedule with no resolution. Worse, they fail to interface effectively with Lufthansa, forcing me to bounce between two equally useless help desks. The apps are unable to handle the situation, the bag dropped off the tracker, and while the call centers are polite, they do not provide written information to assist with cross-airline communication.

l really enjoy very much the flight was very pleasant

The flight was delayed for 1:30 hours for maintenance issues. They should give more information about connecting flights. For a Business Cabin the Crew was mediocre.

The food is terrible. The same pasta or chicken with bad taste and presentation

Everything you need to know for your flight from Louisville to Dulles Intl

Information on your arrival and departure airports