SDF - IAD

$125 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 5/10. 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
$207
Overall average: $322
United Airlines
Wed 5/20Wed 5/27
SDF - IAD • Non-stop
Cheapest one-way
$125
Typical prices: $257-$628
Multiple Airlines
Sun 5/10
SDF - IAD • 2 stops
Advice from real travelers
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
Cheapest • from $207 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 1h 41m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 26% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 23% price drop
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

Wed, May 20 - Wed, May 27
United Airlines Logo
5:50 am - 7:30 am
SDF
-
IAD
1h 40mnonstop
United Airlines Logo
12:48 pm - 2:37 pm
IAD
-
SDF
1h 49mnonstop
$207United Airlines
Fri, May 29 - Mon, Jun 1
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
United Airlines Logo
8:31 am - 10:23 am
IAD
-
SDF
1h 52mnonstop
$229United Airlines
Thu, May 21 - Sun, May 24
Multiple Airlines Logo
6:55 pm - 11:23 am
SDF
-
IAD
16h 28m
2 stops
Multiple Airlines Logo
6:18 pm - 8:18 am
IAD
-
SDF
14h 00m
1 stop
$241Multiple Airlines
Fri, Mar 27 - Thu, Apr 2
United Airlines Logo
9:55 am - 11:38 am
SDF
-
IAD
1h 43mnonstop
United Airlines Logo
12:50 pm - 2:47 pm
IAD
-
SDF
1h 57mnonstop
$244United Airlines
Mon, Jun 22 - Sat, Jun 27
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
United Airlines Logo
8:31 am - 10:23 am
IAD
-
SDF
1h 52mnonstop
$248United Airlines
Thu, Jul 23 - Sun, Jul 26
Delta Logo
7:30 pm - 12:09 am
SDF
-
IAD
4h 39m
1 stop
Delta Logo
6:00 am - 9:55 am
IAD
-
SDF
3h 55m
1 stop
$249Delta
Thu, Apr 16 - Mon, Apr 20
American Airlines Logo
7:52 pm - 11:59 pm
SDF
-
IAD
4h 07m
1 stop
American Airlines Logo
8:11 pm - 12:25 am
IAD
-
SDF
4h 14m
1 stop
$255American Airlines
Tue, Apr 7 - Tue, Apr 14
American Airlines Logo
6:41 pm - 11:06 pm
SDF
-
IAD
4h 25m
1 stop
American Airlines Logo
7:26 pm - 11:30 pm
IAD
-
SDF
4h 04m
1 stop
$257American Airlines
Sun, Mar 29 - Sat, Apr 4
American Airlines Logo
5:00 am - 8:48 am
SDF
-
IAD
3h 48m
1 stop
American Airlines Logo
2:03 pm - 7:03 pm
IAD
-
SDF
5h 00m
1 stop
$258American Airlines
Sun, Mar 29 - Sun, Apr 5
American Airlines Logo
5:00 am - 8:48 am
SDF
-
IAD
3h 48m
1 stop
American Airlines Logo
5:00 am - 8:50 am
IAD
-
SDF
3h 50m
1 stop
$259American Airlines
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 $558 and $364 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 4 weeks before departure, which saves you about 26% 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 seasonFebruary
Cheapest flight$125
Best time to beat the crowds but there is an average 73% increase in price.
Most popular time to fly and prices are also 12% lower on average.
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 $125 for a one-way ticket and $207 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 $279 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 $288 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 $293 or less one-way and $354 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 8293 reviews
7.8Entertainment
8.1Boarding
8.5Crew
7.9Comfort
7.2Food
Airline reviews

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

2.0 MediocreSusan, Mar 2026
JAX - ATL
Read more Delta reviews

We landed and sat on the tarmac for 45 minutes because they only have one gate at the airport and there was another plane running late so we had to wait

The WiFi was not working. That made for a long flight.

Absolutely no communication on why there's a delay and multiple flight time reschedules. I would have canceled the flight and drove back home if I known it was going to be rescheduled 3 or 4 times.

Another late night flight and MORE men belligerently drinking and yelling. I had to move from first to economy because they were so obnoxious and disruptive. Crazy to go from a cozy chair to cardboard when you were supposed to be in first. Delta allows was too much drinking which leads to belligerent behavior.

I was in first class and literally the men behind me were so aggressively loud I moved myself to economy. This has become so common on Delta - people using audio without headphones, and men on 12am / late night flights drinking and yelling to talk to each other which prevents anyone around them from resting. Pretty crazy to have to move from first to economy (poorer service, less comfort...). Wild wild. Looking into other airlines.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Stop changing gates. Stop cancelling flights Stop moving my seat.

Extremely disappointed with Delta. They canceled flight last minute and then I rebooked the other flights and with which were delayed as well

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

The flight was flying with 30% capacity. The flight my seat from preferred seating to back of the seat. Even though i can understand that this was to balance the flight weight. The flight attendance decided to do the serving near my seat and in the middle , their noices woke me up from sleep , when i realized that the service has ended and when they were going back asked for a coffee, for which they answered they have completed teh service in my location. That really upset me as they woke me up and also rejected the coffee i asked. I ended up landing with a headache, thanks to the crew that screwed up my travel

It was okay, the food was good, but after the landing there was not enough time for luggage and security to catch a connection. It was crowded on board.

When I went to check in at the United counter in Barcelona, Spain I had 2 different menat 2 different times in United uniforms (standing around with a couple other employees) ask me if I was traveling alone. The one man asked me 3 different ways if I was traveling alone. I am, 68 yeaers old and have all my faculties. I thought it was weird and it made me feel very uncomfortable. What difference does it make if I was traveling alone or with someone? What if I was a recent widow? That would have been horrible. They never gave me a reason why they needed to know who I was traveling with. I was hesitant to question them because I needed to be on that flight.

Crew was great. 2 1/2 hour delay was due to staff needing "rest" was avoidable and self inflicted as United not willing to hire enough crew to keep flight on time.. Ridiculous. The crew and the passengers both suffered due to this.

Fine not above and beyond as I had a connection that was delayed due to maintenance

Bad food, bad service, cold cabin with no additional blankets when asked for (they told me they don’t provide additional blankets). I’m a frequent traveler and this is one of the worst companies I traveled with (by the way I thought that I booked my ticket with Lufthansa but I didn’t see that the flights were handled by United).

Great other than a couple very drunk guys that for a while kept bumping my seat from behind. The staff did their best to control them. Even refused serving them alcohol and allowed the gal sitting next to them to move.

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.

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

Information on your arrival and departure airports