IAD - SDF

$80 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 6/8. 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

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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Cheap Flight Deals 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.

Recent round-trip flight deals from Dulles Intl to Louisville

KAYAK's recommended round-trip deals from the most popular airlines that fly from Dulles Intl to Louisville.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
12:45 pm - 2:30 pmIAD-SDF
1h 45mnonstop
6:00 am - 7:33 amSDF-IAD
1h 33mnonstop
$179United Airlines
Find Deal
Wed, May 7 - Sat, May 10
8:30 am - 10:19 amIAD-SDF
1h 49mnonstop
6:00 am - 7:33 amSDF-IAD
1h 33mnonstop
$189United Airlines
Find Deal
Sat, May 10 - Sun, May 11
8:40 am - 10:27 amIAD-SDF
1h 47mnonstop
6:00 am - 7:35 amSDF-IAD
1h 35mnonstop
$194United Airlines
Find Deal
Thu, Jul 31 - Sun, Aug 3
3:33 pm - 8:36 pmIAD-SDF
5h 03m1 stop
7:50 am - 12:06 pmSDF-IAD
4h 16m1 stop
$199Delta
Find Deal
Sat, May 10 - Wed, May 14
12:45 pm - 2:30 pmIAD-SDF
1h 45mnonstop
6:00 am - 7:33 amSDF-IAD
1h 33mnonstop
$203United Airlines
Find Deal
Sat, May 10 - Sun, May 11
6:00 am - 10:03 amIAD-SDF
4h 03m1 stop
8:10 am - 12:44 pmSDF-IAD
4h 34m1 stop
$204Delta
Find Deal
Fri, Apr 25 - Wed, Apr 30
8:02 pm - 12:18 amIAD-SDF
4h 16m1 stop
8:15 pm - 12:02 amSDF-IAD
3h 47m1 stop
$263American Airlines
Find Deal
Fri, May 23 - Tue, May 27
3:53 pm - 1:36 pmIAD-SDF
21h 43m1 stop
3:10 pm - 2:28 pmSDF-IAD
23h 18m2 stops
Thu, Jul 31 - Sun, Aug 3
7:05 pm - 8:31 amIAD-SDF
13h 26m1 stop
3:53 pm - 8:14 amSDF-IAD
16h 21m2 stops
Thu, Apr 24 - Sun, May 25
8:02 pm - 12:18 amIAD-SDF
4h 16m1 stop
8:15 pm - 12:02 amSDF-IAD
3h 47m1 stop
$304American Airlines
Find Deal
Thu, May 22 - Tue, May 27

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 August, where tickets cost $255 (return) on average. On the other hand, the most expensive months are September and March, where the average cost of round-trip tickets is $433 and $429 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 4 weeks before departure. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low season

February

High season

August

Cheapest flight

$80
Best time to beat the crowds with an average 22% drop in price.
Most popular time to fly and prices are also 25% lower on average.
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 $80 for a one-way ticket and $179 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 $269 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $332 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.

See more FAQs

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 $205 or less one-way and $249 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to Louisville?

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

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Tuesday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Wednesday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Thursday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Friday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Saturday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Sunday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

See more direct flights

Direct returns

Louisville Intl to Washington, D.C. Dulles Intl

Monday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Tuesday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Wednesday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Thursday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Friday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Saturday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

Sunday

Air Canada, Copa Airlines, Lufthansa, +1 more

Air Canada, Copa Airlines, +2 more

See more direct flights
See more direct flights

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.
8.0
DeltaOverall score based on 7899 reviews
7.9Entertainment
8.2Boarding
8.5Crew
8.0Comfort
7.3Food
Airline reviews

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

10.0 ExcellentSunderesh, Mar 2025AUS - BOS
Read more Delta reviews

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

The plane was old with small storage areas that had problems closing/latching and not enough storage for everyone, and worn, damaged seats. Service was great but feel a little unsafe on such well used planes.

Terrible and im avoiding them in the future. My initial flight was delayed causing me to rebook my flight and when speaking with the representative to rebook I explained this is the second time my flights were delayed and they did nothing to help me. I wasn't booked to comfort plus or given a voucher or anything. I was almost late for my meeting that I needed to attend on Monday because of the games delta played delaying my flights even more and putting me in the very back of the plane next to an extremely intoxicated passenger

Flights on time. .Ride was as comfortable as can be expected in steerage. Luggage arrived at destination. Attendants were fairly friendly.

Great staff. Wifi is terrible. Signing up for skylines is a painstaking process. Had to call customer service just to get my flight itinerary and confirmation sent to me. Consistent delays. A well staffed company that is run so poorly. Upper management needs to be renewed.

The WiFi didn't seem as fast as it normally is

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

The crew was wonderful and attentive. The seats near exit row were restrictive. Offer healthy snacks please

Delta is a premier airline so my expectations are most always met.

Compared with other carriers business class for an overnight was not worth the extra expense.

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

We boarded but then sat there waiting on some missed connection people to get on so we sat for about 15 minutes for that. Then we sat again because the passenger manifest was wrong and they had to figure it out before we could leave. That took about another 20 minutes or so. The crew was working hard to figure it out so it’s not their fault. It ended up being a system glitch where someone was upgraded to first class while another person was also in the same seat and it just created a mess that took a little while to figure out. They literally went to every person on the plane asking their names to see who was sitting in the wrong seat. I also hate the entertainment that must be watched on your phone or tablet. Just give us setback screens. It’s so much better. Almost every Delta flight has this now and it is so nice to have them. The crew did a great job. I have no complaints from them. They were very hard working, even with the mishap and a disgruntled passenger.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Flight was cramped with every seat taken. The food was fine, nothing crazy to write home about. The plane felt dated and needing some TLC, the button for the window shade didn't work and there were no AC outlets to use. When communicating with staff all except one nice lady never seemed happy to help me almost like I was bothering them when asked for things like a glass of water or a snack. The flight was overall fine. It did what was needed which is get me from point A to point B. But it certainly was not special. I don't expect much in economy but I believe economy on a host of other airlines is more memorable and better experience.

Overall poor for me I paid extra for seats with leg room and my regional flights exit row seats have less leg room then the others that's money that could have been saved and on my final flight home the flights air was not operating it was unbearably hot in the cabin I will be contacting United and filing a DOT complaint

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

Liked nothing. As per previous segment it was delay delay delay.

I completely missed my flight because the first leg was longer than planned. I had to sleep overnight in the airport because no accommodation was provided and then sent to Trinidad in the morning with an anticipated 7 hour layover before my flight to Georgetown which was now with Caribbean Airlines. I tried twice with customer service to see if they could put me on an earlier flight which had seats available but was told it wasn’t possible.

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

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