$219 Cheap Flights from Lafayette (LAF) to Washington (IAD)

View $219 flight on Fri, Jul 4, 2025Opens in a new window

Popular airlines from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD)

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Cheap Flights from Lafayette to Washington (LAF-IAD)

Prices were available within the past 7 days and start at $219 for one-way flights and $486 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southern Airways Express
Fri, Jul 25 - Mon, Jul 28
LAF
Lafayette
IAD
Washington
$486 Roundtrip, found 1 day ago
$486
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Fri, Jul 25 from Lafayette to Washington, returning Mon, Jul 28, priced at $486 found 1 day ago
Southern Airways Express
Fri, Jul 25 - Mon, Jul 28
LAF
Lafayette
IAD
Washington
$487 Roundtrip, found 1 day ago
$487
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Fri, Jul 25 from Lafayette to Washington, returning Mon, Jul 28, priced at $487 found 1 day ago
Southern Airways Express
Fri, Jul 25 - Mon, Jul 28
LAF
Lafayette
IAD
Washington
$488 Roundtrip, found 1 day ago
$488
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Fri, Jul 25 from Lafayette to Washington, returning Mon, Jul 28, priced at $488 found 1 day ago
Southern Airways Express
Fri, Jul 25 - Mon, Jul 28
LAF
Lafayette
IAD
Washington
$531 Roundtrip, found 1 day ago
$531
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Fri, Jul 25 from Lafayette to Washington, returning Mon, Jul 28, priced at $531 found 1 day ago
Southern Airways Express
Fri, Jul 25 - Mon, Jul 28
LAF
Lafayette
IAD
Washington
$532 Roundtrip, found 1 day ago
$532
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Fri, Jul 25 from Lafayette to Washington, returning Mon, Jul 28, priced at $532 found 1 day ago
Southern Airways Express
Fri, Jul 25 - Mon, Jul 28
LAF
Lafayette
IAD
Washington
$533 Roundtrip, found 1 day ago
$533
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Fri, Jul 25 from Lafayette to Washington, returning Mon, Jul 28, priced at $533 found 1 day ago
United
Thu, May 14 - Fri, May 15
LAF
Lafayette
IAD
Washington
$533 Roundtrip, found 19 hours ago
$533
Roundtrip
found 19 hours ago
Select United flight, departing Thu, May 14 from Lafayette to Washington, returning Fri, May 15, priced at $533 found 19 hours ago
Southern Airways Express
Tue, Jul 22 - Wed, Jul 30
LAF
Lafayette
IAD
Washington
$536 Roundtrip, found 1 day ago
$536
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Tue, Jul 22 from Lafayette to Washington, returning Wed, Jul 30, priced at $536 found 1 day ago
Southern Airways Express
Tue, Jul 22 - Tue, Jul 29
LAF
Lafayette
IAD
Washington
$537 Roundtrip, found 1 day ago
$537
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Tue, Jul 22 from Lafayette to Washington, returning Tue, Jul 29, priced at $537 found 1 day ago
Southern Airways Express
Fri, Jul 25 - Tue, Jul 29
LAF
Lafayette
IAD
Washington
$538 Roundtrip, found 1 day ago
$538
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Fri, Jul 25 from Lafayette to Washington, returning Tue, Jul 29, priced at $538 found 1 day ago
Flights from Lafayette (LAF) to Washington (IAD)
Origin airport
Purdue University
Destination airport
Washington Dulles Intl.
Airlines serving
United
Roundtrip price
$486
Distance
513 mi

Lafayette to Washington Flights

The cheapest times to fly from Lafayette to Washington

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Lafayette to Washington are during the month of July. You can find some of the cheapest flights from Lafayette to Washington with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Lafayette to Washington

Sunday is one of the best days to book for cheap flights from Lafayette to Washington: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Lafayette to Washington

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Lafayette to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $219 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Lafayette to Washington flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Lafayette to Washington airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD) cost?
Discover the latest flight deals from LAF to IAD by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from LAF to IAD?
The cheapest flights from LAF to IAD are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD)?
Direct flights aren't available from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD). However, there are other airports offering nonstop flights. Start your journey at Indianapolis Intl. Airport (IND) and head straight to Washington without layovers.
What is the cheapest airline that flies from LAF to IAD?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from LAF to IAD. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD)?
There are no daily direct flights departing from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from LAF to IAD?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* However, this can vary based on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD)?
To land at Washington Dulles Intl. Airport (IAD) without delays, choose a flight that leaves Lafayette, IN (LAF-Purdue University) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD) last-minute?
Booking your plane ticket from LAF to IAD just before your journey is usually more expensive. But if there's some wiggle room with your itinerary, you could snag a cheap last-minute fare.
Is it cheaper to book a LAF to IAD flight and hotel package?
You'll generally save money by securing a LAF to IAD flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one place. Once you've selected your preferred flights and accommodations, consider adding extras such as tours, car rentals and activities.
Can I cancel or change the date of my flight from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD)?
If you booked your LAF to IAD flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you have, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

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*Available to One Key members.