IAD - SDF

$99 Find Cheap Flights from Washington Dulles Airport to Louisville

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Louisville departing on 12/17. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Louisville

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Louisville, 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 Washington, D.C. to Louisville, as well as popular online travel agencies
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Louisville 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 Dulles Intl to Louisville

Wed, Nov 12 - Mon, Nov 17
United Airlines Logo
12:50 pm - 2:45 pmIAD-SDF
1h 55mnonstop
United Airlines Logo
2:35 pm - 4:11 pmSDF-IAD
1h 36mnonstop
$194United Airlines
Find Deal
Tue, Oct 14 - Wed, Oct 15
Delta Logo
6:05 am - 9:50 amIAD-SDF
3h 45m1 stop
Delta Logo
8:17 am - 2:38 pmSDF-IAD
6h 21m1 stop
$197Delta
Find Deal
Fri, Nov 21 - Tue, Nov 25
United Airlines Logo
12:50 pm - 2:45 pmIAD-SDF
1h 55mnonstop
United Airlines Logo
9:55 am - 11:33 amSDF-IAD
1h 38mnonstop
$199United Airlines
Find Deal
Sat, Oct 25 - Wed, Oct 29
Delta Logo
6:05 am - 9:50 amIAD-SDF
3h 45m1 stop
Delta Logo
12:54 pm - 4:57 pmSDF-IAD
4h 03m1 stop
$203Delta
Find Deal
Sat, Oct 25 - Mon, Oct 27
Delta Logo
6:05 am - 9:50 amIAD-SDF
3h 45m1 stop
Delta Logo
8:15 pm - 12:12 amSDF-IAD
3h 57m1 stop
$209Delta
Find Deal
Sat, Oct 11 - Tue, Oct 14
United Airlines Logo
1:05 pm - 2:51 pmIAD-SDF
1h 46mnonstop
United Airlines Logo
9:55 am - 11:34 amSDF-IAD
1h 39mnonstop
$213United Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 15
Delta Logo
6:05 am - 9:50 amIAD-SDF
3h 45m1 stop
Delta Logo
8:17 am - 2:38 pmSDF-IAD
6h 21m1 stop
$218Delta
Find Deal
Mon, Dec 8 - Fri, Jan 2
United Airlines Logo
6:45 pm - 8:42 pmIAD-SDF
1h 57mnonstop
United Airlines Logo
9:55 am - 11:36 amSDF-IAD
1h 41mnonstop
$219United Airlines
Find Deal
Thu, Nov 6 - Sun, Nov 9
American Airlines Logo
8:09 pm - 12:22 amIAD-SDF
4h 13m1 stop
American Airlines Logo
7:31 pm - 11:59 pmSDF-IAD
4h 28m1 stop
$262American Airlines
Find Deal
Sat, Oct 18 - Sat, Oct 25
American Airlines Logo
6:34 am - 11:33 amIAD-SDF
4h 59m1 stop
American Airlines Logo
8:08 pm - 11:53 pmSDF-IAD
3h 45m1 stop
$265American Airlines
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $194 (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 29% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
February
Cheapest • 21% price drop
September
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$194
Overall average: $324
United Airlines
Wed 11/12Mon 11/17
IAD - SDF • Non-stop
Cheapest one-way
$99
Typical prices: $174-316
Delta
Wed 12/17
IAD - SDF • 1 stop
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 Louisville!
Booking Insights

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

Get data-powered insights and trends into flights from Dulles Intl to Louisville 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 Washington Dulles Airport to Louisville?

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

If your flying dates are flexible, you should consider flying to Louisville on a Saturday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from Washington Dulles Airport to Louisville. For your return ticket, we recommend flying on a Friday and avoiding Tuesdays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Louisville, 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 Washington, D.C. Dulles Intl Airport to Louisville is February, where tickets cost $263 (return) on average. On the other hand, the most expensive months are March and September, where the average cost of round-trip tickets is $403 and $379 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to Louisville, 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 Washington, D.C. Dulles Intl Airport to Louisville, you should book around 2 weeks before departure, which saves you about 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$99
Best time to beat the crowds but there is an average 20% increase in price.
Most popular time to fly with an average 13% increase in price.
Flight from Washington Dulles Airport to Louisville

When to book flights from Dulles Intl to Louisville

Are your dates flexible? Find out the best times to travel from Dulles Intl to Louisville 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 Washington Dulles Airport to Louisville flights

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

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Louisville was $99 for a one-way ticket and $194 for a round-trip.

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

    A passport is not required to fly from Washington Dulles Airport to Louisville.

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

    Washington Dulles Airport and Louisville are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at Louisville Intl.

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

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

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

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

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

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Louisville.

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

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

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Louisville 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 $339 and an overall rating of 7.4.

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

    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 Washington Dulles Airport to Louisville.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Louisville from Washington Dulles Airport 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 Washington Dulles Airport to Louisville?

    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 Louisville with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SDF 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 Washington Dulles Airport to Louisville?

    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 Louisville from Washington Dulles Airport 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 Washington, D.C. Dulles Intl Airport to Louisville

  • Looking for a cheap flight? 25% of our users found flights on this route for $258 or less one-way and $229 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to Louisville?

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

Direct departures

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

Direct returns

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

Reviews of the top airlines flying from Dulles Intl to Louisville

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Louisville. 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 Dulles Intl to Louisville? 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 7954 reviews
7.9Comfort
7.3Food
8.2Boarding
8.5Crew
7.9Entertainment
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

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

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