$214 Cheap United flights Washington (IAD) to Louisville (SDF)

View $214 flight on Sun, Oct 19, 2025Opens in a new window

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$214 Cheap United flights Washington (IAD) to Louisville (SDF)

Prices were available within the past 7 days and start at $214 for one-way flights and $193 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Sep 15 - Sat, Sep 20
IAD
Washington
SDF
Louisville
$193 Roundtrip, found 2 days ago
$193
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 15 from Washington to Louisville, returning Sat, Sep 20, priced at $193 found 2 days ago
United
Fri, Sep 5 - Sat, Sep 6
IAD
Washington
SDF
Louisville
$199 Roundtrip, found 1 day ago
$199
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 5 from Washington to Louisville, returning Sat, Sep 6, priced at $199 found 1 day ago
United
Sat, Oct 11 - Tue, Oct 14
IAD
Washington
SDF
Louisville
$210 Roundtrip, found 7 hours ago
$210
Roundtrip
found 7 hours ago
Select United flight, departing Sat, Oct 11 from Washington to Louisville, returning Tue, Oct 14, priced at $210 found 7 hours ago
United
Mon, Sep 8 - Fri, Sep 19
IAD
Washington
SDF
Louisville
$215 Roundtrip, found 2 days ago
$215
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 8 from Washington to Louisville, returning Fri, Sep 19, priced at $215 found 2 days ago
United
Wed, Oct 8 - Sat, Oct 11
IAD
Washington
SDF
Louisville
$217 Roundtrip, found 3 days ago
$217
Roundtrip
found 3 days ago
Select United flight, departing Wed, Oct 8 from Washington to Louisville, returning Sat, Oct 11, priced at $217 found 3 days ago
United
Fri, Oct 3 - Tue, Oct 7
IAD
Washington
SDF
Louisville
$218 Roundtrip, found 4 days ago
$218
Roundtrip
found 4 days ago
Select United flight, departing Fri, Oct 3 from Washington to Louisville, returning Tue, Oct 7, priced at $218 found 4 days ago
Flights from Washington (IAD) to Louisville (SDF)
Origin airport
Washington Dulles Intl.
Destination airport
Louisville Intl.
Airlines serving
American Airlines, Delta, United
Popular airline
United
Distance
451 mi
Average flight time
1 hour 45 mins

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF)?
Set the "Price (lowest to highest)" filter on Expedia to find cheap United Airlines return flights from $193 from IAD to SDF. Affordable one-way options from $214 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to SDF with United Airlines?
January is one of the least expensive months to fly to Louisville with United Airlines. You could also find great deals on return and one-way fares in December.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF) with United Airlines?
To find cheap United Airlines fares from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF), start searching one to three months before your intended departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact what you pay. Sunday tends to be the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your trip on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF)?
Yes, you can travel from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF) on one of United Airlines's 14 direct weekly flights. Make use of our "Nonstop" and "Airline" filters to find the United Airlines flight that'll get you to SDF at your preferred time.
How long does it take to fly from IAD to SDF with United Airlines?
Depart Washington Dulles Intl. Airport (IAD) for Louisville Intl. Airport (SDF) on a direct United Airlines flight, and you'll be airborne for around 1h 53m.
Which day of the week has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF)?
United Airlines has the most flights from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF) on Thursday. With up to 2 daily departures, you'll get the most options and flexibility on this day.
What is the earliest United Airlines flight from IAD to SDF?
The first flight from IAD to SDF with United Airlines departs at 12:45PM UTC-5. You'll touch down at 2:38PM UTC-5. The last United Airlines flight of the day takes off at 5:55PM UTC-5 and arrives at 7:48PM UTC-5. With approximately 20% fewer cancellations for departures before noon, setting off early is usually the best option.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Louisville?
United Airlines flights from Washington Dulles Intl. Airport (IAD) to Louisville land at Louisville Intl. Airport (SDF). This is the main gateway to this city.
Why fly with United Airlines from IAD to SDF?
Travel from IAD to SDF with United Airlines and you can look forward to a range of benefits starting with a rewarding loyalty program. When you book through Expedia as a United Mileage Plus and One Key™ member, you may also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF)?
You'll most likely board an Embraer 175 for your United Airlines flight from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF). However, you could be switched to another aircraft for operational reasons.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to Louisville Intl. Airport (SDF)?
Depending on your fare type, a fee will generally apply if you cancel or reschedule your booking more than 24 hours after it has been confirmed. To secure flexible fares, select our "Changes included" and "No cancel fee" boxes while looking for flights. For more information on changing or canceling your reservation, go to "Trips," select your flight and tick "Manage Booking."

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