SDF - IAD

$116 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 3/5. 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
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Everything you should know

Cheapest round-trip
$209
Overall average: $275
Delta
Thu 1/8Thu 1/15
SDF - IAD • 1 stop
Cheapest non-stop
$219
Typical prices: $249-$407
United Airlines
Thu 12/25Mon 12/29
SDF - IAD • Non-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
Delta
Cheapest • from $209 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 19% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 18% price drop
November
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

Thu, Jan 8 - Thu, Jan 15
Delta Logo
10:51 am - 4:46 pm
SDF
-
IAD
5h 55m1 stop
Delta Logo
6:00 am - 10:11 am
IAD
-
SDF
4h 11m1 stop
$209Delta
Mon, Jan 12 - Thu, Jan 15
Multiple Airlines Logo
6:54 pm - 11:43 am
SDF
-
IAD
16h 49m2 stops
Multiple Airlines Logo
7:19 pm - 10:07 am
IAD
-
SDF
14h 48m1 stop
$210Multiple Airlines
Thu, Dec 25 - Mon, Dec 29
United Airlines Logo
9:55 am - 11:36 am
SDF
-
IAD
1h 41mnonstop
United Airlines Logo
5:15 pm - 7:11 pm
IAD
-
SDF
1h 56mnonstop
$219United Airlines
Fri, Feb 27 - Sun, Mar 1
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
$232United Airlines
Fri, Jan 9 - Mon, Jan 12
Delta Logo
7:05 am - 1:59 pm
SDF
-
IAD
6h 54m1 stop
Delta Logo
6:00 am - 10:11 am
IAD
-
SDF
4h 11m1 stop
$234Delta
Wed, Feb 11 - Mon, Feb 23
Multiple Airlines Logo
1:55 pm - 7:20 am
SDF
-
IAD
17h 25m1 stop
Multiple Airlines Logo
5:22 pm - 12:21 pm
IAD
-
SDF
42h 59m2 stops
$242Multiple Airlines
Thu, Jan 1 - Sat, Jan 10
United Airlines Logo
9:55 am - 11:36 am
SDF
-
IAD
1h 41mnonstop
United Airlines Logo
5:45 pm - 7:43 pm
IAD
-
SDF
1h 58mnonstop
$249United Airlines
Thu, Jan 1 - Mon, Jan 5
United Airlines Logo
9:55 am - 11:36 am
SDF
-
IAD
1h 41mnonstop
United Airlines Logo
5:15 pm - 7:11 pm
IAD
-
SDF
1h 56mnonstop
$250United Airlines
Fri, Jan 9 - Mon, Jan 12
Delta Logo
10:41 am - 4:46 pm
SDF
-
IAD
6h 05m1 stop
Delta Logo
5:26 pm - 9:15 pm
IAD
-
SDF
3h 49m1 stop
$252Delta
Thu, Jan 8 - Thu, Jan 15
Multiple Airlines Logo
3:36 pm - 2:08 pm
SDF
-
IAD
22h 32m2 stops
Multiple Airlines Logo
8:49 am - 1:00 pm
IAD
-
SDF
28h 11m1 stop
$258Multiple 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 Saturdays 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 April and December, where the average cost of round-trip tickets is $359 and $349 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 2 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 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.
Airlines
Lufthansa

Lufthansa's Economy Flex allows free rebooking, ideal for flexible travel plans.


Lufthansa offers FlyNet Messaging for free to Miles & More members on short-haul flights.

United Airlines

United offers Priority Boarding to avoid gate-checking your carry-on, placing you in Zone 2.


United's Economy Plus seats provide up to six inches more legroom than standard economy seats.

Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Lufthansa

Jessica Macdonald

Jessica Macdonald

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

Stefanie Waldek

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

Good to know

Low seasonOctober
Cheapest flight$116
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 7% 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 $116 for a one-way ticket and $209 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 $258 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 $341 or less one-way and $428 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 8009 reviews
7.3Food
7.9Comfort
8.5Crew
8.1Boarding
7.9Entertainment
Airline reviews

The food is terrible. The staff is wonderful. Comfort is good.

10.0 ExcellentRonda, Dec 2025
JAX - JFK
Read more Delta reviews

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

No lunch on a x-country flight scheduled for 10:50 am departure, arrived 5+ hrs later. That requires a black box label before you pay for the tickets. Worst, when I checked in online, it's specifically said that lunch was served on his flight for economy Plus passengers.

We had a lot of really rough weather but that was not Delta's fault. Pilot was amazing.

First, Delta needs more flights to/from Miami. Second, a 1000pm leaving at 1230pm is unacceptable from their biggest airport world hub. Another aircraft could have been used such as the aircraft scheduled to be used in the morning for that exact same route. Yes, I did get me there but the lack of sleep the next day didn't help me enjoy my entire trip since I was busy with activities during the weekend. This can be and is expected from Spirit (going bankrupt) and Frontier (despite they're nickel and dimers). But from Delta's World Hub? That's totally unacceptable!

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

It was probably one of the worst flights I’ve been on. The restrooms were never cleaned or stocked. The food was very subpar, and i usually enjoy airline food, so I was disappointed. It was just all around a bad experience. The only saving grace was the flight attendants.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Great crew, excellent landing, good food. Over all great experience. Thank you!

One bag is incorrect and not acceptable for an international flight. The food was not just good. I won't fly with them again.

Not pleasant trip cross country when the entertainment and WiFi system not working. No entertainment for entirety of route. Staff was rather nonchalant in that they dismissed the problem due to age of plane. It would have been nice to know this up front so I could have come prepared to read or download movies before boarding Coincidentally or not, there was a similar issue with the entertainment system on my previous flight I took on my fist leg of the trip. There are no seat TVs, so you must rely on the app when it works. United can do better. Also, what use it it to pay for boarding group 2 when half of the passengers are in the same line as you?

Crew was dismissive. Snacks and refills not offered. Poor business class experience. Bed not comfortable compared to Emirates or BA.

Flight was delayed for 5 hours because crew didn’t have enough time to rest - this seems like it could have been avoided with better scheduling. Food was not good.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

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

Information on your arrival and departure airports