SDF - IAD

$114 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 7/15. 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
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Everything you should know

Cheapest round-trip
$239
Typical prices: $264-$324
United Airlines
Thu 8/20Sat 8/22
SDF - IAD • Non-stop
Cheapest one-way
$114
Typical prices: $134-$208
Multiple Airlines
Wed 7/15
SDF - IAD • 1 stop
Top airlines
Cheapest • from $239 (round-trip)
Best reviews • 7.8 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 39m
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 3 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 17% 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

Thu, Aug 20 - Sat, Aug 22
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
United Airlines Logo
5:15 pm - 7:05 pm
IAD
-
SDF
1h 50mnonstop
$239United Airlines
Wed, Jul 8 - Thu, Jul 16
Multiple Airlines Logo
12:16 pm - 7:38 pm
SDF
-
IAD
7h 22m
1 stop
Multiple Airlines Logo
6:25 pm - 8:12 am
IAD
-
SDF
13h 47m
1 stop
$240Multiple Airlines
Sat, Sep 19 - Wed, Sep 23
Delta Logo
3:33 pm - 8:15 pm
SDF
-
IAD
4h 42m
1 stop
Delta Logo
6:00 am - 10:19 am
IAD
-
SDF
4h 19m
1 stop
$243Delta
Mon, Jul 13 - Thu, Jul 16
Multiple Airlines Logo
8:48 pm - 7:38 pm
SDF
-
IAD
22h 50m
1 stop
Multiple Airlines Logo
6:25 pm - 8:12 am
IAD
-
SDF
13h 47m
1 stop
$244Multiple Airlines
Wed, Sep 9 - Sun, Sep 13
Delta Logo
7:05 am - 2:12 pm
SDF
-
IAD
7h 07m
1 stop
Delta Logo
6:00 am - 11:33 am
IAD
-
SDF
5h 33m
1 stop
$248Delta
Thu, Jul 9 - Sat, Jul 18
United Airlines Logo
6:00 am - 7:35 am
SDF
-
IAD
1h 35mnonstop
United Airlines Logo
12:48 pm - 2:37 pm
IAD
-
SDF
1h 49mnonstop
$249United Airlines
Wed, Aug 26 - Sun, Aug 30
Multiple Airlines Logo
2:56 pm - 12:53 pm
SDF
-
IAD
21h 57m
2 stops
Multiple Airlines Logo
5:30 pm - 10:29 am
IAD
-
SDF
16h 59m
1 stop
$253Multiple Airlines
Sat, Sep 19 - Wed, Sep 23
United Airlines Logo
1:56 pm - 3:34 pm
SDF
-
IAD
1h 38mnonstop
United Airlines Logo
12:50 pm - 2:37 pm
IAD
-
SDF
1h 47mnonstop
$258United Airlines
Thu, Sep 10 - Mon, Sep 14
Delta Logo
7:05 am - 11:31 am
SDF
-
IAD
4h 26m
1 stop
Delta Logo
5:30 pm - 11:59 pm
IAD
-
SDF
6h 29m
1 stop
$259Delta
Thu, Sep 10 - Sun, Sep 13
Delta Logo
7:05 am - 2:12 pm
SDF
-
IAD
7h 07m
1 stop
Delta Logo
6:00 am - 9:51 am
IAD
-
SDF
3h 51m
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.

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

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Louisville to Washington, D.C. Dulles Intl Airport departing in August.

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 Mondays.

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 March, where tickets cost $274 (return) on average. On the other hand, the most expensive months are February and April, where the average cost of round-trip tickets is $628 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 3 weeks before departure, which saves you about 29% 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$114
Best time to beat the crowds but there is an average 10% increase in price.
Most popular time to fly and prices are also 16% 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 5 days, the lowest price for a flight from Louisville to Washington, D.C. Dulles Intl Airport was $108 for a one-way ticket and $239 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 $283 and an overall rating of 7.8, 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 $250 or less one-way and $409 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.
7.8
DeltaOverall score based on 8419 reviews
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
7.8Comfort
Airline reviews

Horrible. Faucet in sink not working, wifi not working. Didn’t bring food or snacks

2.0 MediocreMargaret, Jun 2026
MSY - LGA
Read more Delta reviews

Horrible. Faucet in sink not working, wifi not working. Didn’t bring food or snacks

Flight was delayed before take off and at landing. Baggage took 20 minutes. Flight crew would not serve full soft drink and had to ask multiple times before receiving water.

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

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

Information on your arrival and departure airports