$69 Cheap United flights Louisville (SDF) to Washington (IAD)

View $69 flight on Tue, Aug 26, 2025Opens in a new window

$69 Cheap United flights Louisville (SDF) to Washington (IAD)

Prices were available within the past 7 days and start at $69 for one-way flights and $137 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Aug 26 - Thu, Aug 28
SDF
Louisville
IAD
Washington
$137 Roundtrip, found 1 hour ago
$137
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Aug 26 from Louisville to Washington, returning Thu, Aug 28, priced at $137 found 1 hour ago
United
Wed, Oct 8 - Sat, Oct 11
SDF
Louisville
IAD
Washington
$144 Roundtrip, found 7 hours ago
$144
Roundtrip
found 7 hours ago
Select United flight, departing Wed, Oct 8 from Louisville to Washington, returning Sat, Oct 11, priced at $144 found 7 hours ago
United
Thu, Sep 4 - Mon, Sep 8
SDF
Louisville
IAD
Washington
$155 Roundtrip, found 8 hours ago
$155
Roundtrip
found 8 hours ago
Select United flight, departing Thu, Sep 4 from Louisville to Washington, returning Mon, Sep 8, priced at $155 found 8 hours ago
United
Thu, Aug 14 - Sun, Aug 17
SDF
Louisville
IAD
Washington
$163 Roundtrip, found 9 hours ago
$163
Roundtrip
found 9 hours ago
Select United flight, departing Thu, Aug 14 from Louisville to Washington, returning Sun, Aug 17, priced at $163 found 9 hours ago
United
Wed, Oct 8 - Sat, Oct 11
SDF
Louisville
IAD
Washington
$168 Roundtrip, found 7 hours ago
$168
Roundtrip
found 7 hours ago
Select United flight, departing Wed, Oct 8 from Louisville to Washington, returning Sat, Oct 11, priced at $168 found 7 hours ago
United
Thu, Aug 7 - Mon, Aug 11
SDF
Louisville
IAD
Washington
$173 Roundtrip, found 22 hours ago
$173
Roundtrip
found 22 hours ago
Select United flight, departing Thu, Aug 7 from Louisville to Washington, returning Mon, Aug 11, priced at $173 found 22 hours ago
Flights from Louisville (SDF) to Washington (IAD)
Origin airport
Louisville Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, United
Popular airline
United
Distance
451 mi
Average flight time
1 hour 38 mins

Frequently asked questions

How much is a United Airlines flight from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD)?
You'll find cheap return United Airlines flights from $137 from SDF to IAD by filtering your results from "Price (lowest to highest)" on Expedia. Or search for deals from $69 for a one-way trip.**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 SDF to IAD with United Airlines?
United Airlines flights to Washington tend to be more affordable in the low-season months of January and February. Whether you're in search of a one-way or round-trip ticket, you could find a better deal then.
What is the cheapest time to book flights from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD) with United Airlines?
Look for affordable United Airlines flights from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD) one to three months prior to your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and itinerary, the ideal day to book a domestic flight is usually Sunday and the most expensive tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**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 Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD)?
Easily travel from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD) on any of United Airlines's 14 direct weekly flights. Use Expedia's "Nonstop" and "Airline" filters to find the United Airlines flight that'll take you to IAD at a time that suits you.
How long does it take to fly from SDF to IAD with United Airlines?
Depart Louisville Intl. Airport (SDF) for Washington Dulles Intl. Airport (IAD) on a nonstop United Airlines flight, and you'll be in the sky for around 1h 37m.
Which day of the week has the most United Airlines flights from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD)?
United Airlines has the most flights from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD) on Thursday. With up to 2 daily departures, you'll get the most flexibility on this day.
What is the earliest United Airlines flight from SDF to IAD?
Taking off from SDF at 9:55AM UTC-5, the earliest United Airlines flight to IAD arrives at 11:34AM UTC-5. Traveling early means you'll be less likely to encounter cancellations or delays.* Don't like early starts? The last United Airlines flight from SDF to IAD departs at 2:30PM UTC-5 and touches down at 4:06PM UTC-5.*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 Washington?
When taking off from Louisville Intl. Airport (SDF) to Washington with United Airlines, you'll most likely land at Washington Dulles Intl. Airport (IAD). This is the airline's primary hub here. Other nearby airports like Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) may offer more affordable flights, so it's a smart idea to consider all available options on Expedia.
Why fly with United Airlines from SDF to IAD?
A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to depart from SDF to IAD with United Airlines. Plus, when you sign up to Expedia's free One Key™ program, you can receive OneKeyCash™* alongside any airline loyalty program earnings. It's yours to spend on future bookings.*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 Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD)?
Chances are you'll be on an Embraer 175 for your United Airlines flight from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD). However, you may be switched to a different aircraft if there's an operational need.
Can I change or cancel my United Airlines flight from Louisville Intl. Airport (SDF) to Washington Dulles Intl. Airport (IAD)?
Depending on your ticket type, a fee will generally apply if you modify or cancel your flight more than 24 hours after it has been confirmed. To find flexible plane tickets, select our "Changes included" or "No cancel fee" filter when searching for flights. For additional information on modifying or canceling your reservation, head to "Trips," select your flight and tick "Manage Booking."

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