$234 Cheap Flights from Lafayette (LAF) to Washington (IAD)

View $234 flight on Mon, Nov 24, 2025Opens in a new window

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

Cheap Flights from Lafayette to Washington (LAF-IAD)

Prices were available within the past 7 days and start at $234 for one-way flights and $249 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Nov 6 - Thu, Nov 13
LAF
Lafayette
IAD
Washington
$249 Roundtrip, found 6 days ago
$249
Roundtrip
found 6 days ago
Select United flight, departing Thu, Nov 6 from Lafayette to Washington, returning Thu, Nov 13, priced at $249 found 6 days ago
United
Thu, Nov 6 - Thu, Nov 13
LAF
Lafayette
IAD
Washington
$270 Roundtrip, found 6 days ago
$270
Roundtrip
found 6 days ago
Select United flight, departing Thu, Nov 6 from Lafayette to Washington, returning Thu, Nov 13, priced at $270 found 6 days ago
United
Sat, Nov 8 - Thu, Nov 13
LAF
Lafayette
IAD
Washington
$319 Roundtrip, found 6 days ago
$319
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 8 from Lafayette to Washington, returning Thu, Nov 13, priced at $319 found 6 days ago
United
Sat, Nov 8 - Tue, Nov 11
LAF
Lafayette
IAD
Washington
$324 Roundtrip, found 6 days ago
$324
Roundtrip
found 6 days ago
Select United flight, departing Sat, Nov 8 from Lafayette to Washington, returning Tue, Nov 11, priced at $324 found 6 days ago
United
Thu, Nov 6 - Thu, Nov 13
LAF
Lafayette
IAD
Washington
$340 Roundtrip, found 6 days ago
$340
Roundtrip
found 6 days ago
Select United flight, departing Thu, Nov 6 from Lafayette to Washington, returning Thu, Nov 13, priced at $340 found 6 days ago
United
Mon, Nov 3 - Thu, Nov 13
LAF
Lafayette
IAD
Washington
$349 Roundtrip, found 6 days ago
$349
Roundtrip
found 6 days ago
Select United flight, departing Mon, Nov 3 from Lafayette to Washington, returning Thu, Nov 13, priced at $349 found 6 days ago
United
Mon, Nov 3 - Tue, Nov 11
LAF
Lafayette
IAD
Washington
$354 Roundtrip, found 6 days ago
$354
Roundtrip
found 6 days ago
Select United flight, departing Mon, Nov 3 from Lafayette to Washington, returning Tue, Nov 11, priced at $354 found 6 days ago
United
Thu, Nov 6 - Thu, Nov 13
LAF
Lafayette
IAD
Washington
$363 Roundtrip, found 6 days ago
$363
Roundtrip
found 6 days ago
Select United flight, departing Thu, Nov 6 from Lafayette to Washington, returning Thu, Nov 13, priced at $363 found 6 days ago
United
Fri, Nov 7 - Tue, Nov 11
LAF
Lafayette
IAD
Washington
$369 Roundtrip, found 6 days ago
$369
Roundtrip
found 6 days ago
Select United flight, departing Fri, Nov 7 from Lafayette to Washington, returning Tue, Nov 11, priced at $369 found 6 days ago
United
Thu, Nov 6 - Thu, Nov 13
LAF
Lafayette
IAD
Washington
$384 Roundtrip, found 6 days ago
$384
Roundtrip
found 6 days ago
Select United flight, departing Thu, Nov 6 from Lafayette to Washington, returning Thu, Nov 13, priced at $384 found 6 days ago

Alternative airports near Washington

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Ronald Reagan Washington National DCA. Cheapest and Closest option available. Average driving time to city center is 8 minutes. Flights from $274
DCA
Ronald Reagan Washington National
CheapestClosest
Average driving time to city center8 min
Flights from $274

Frequently asked questions

How much does a flight from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD) cost?
Secure a cheap one-way flight from $234 or cheap return flight from $249 from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD)?
November is the least expensive month to fly from LAF to IAD. Planning your trip for the off-season is often the key to finding better deals on flights.
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 Lafayette, IN (LAF-Purdue University) to Washington Dulles Intl. Airport (IAD)?
Use the filter tool on Expedia to compare different airlines and find the cheapest carrier that'll take you from LAF to IAD. Then, sort your results by "Price (lowest to highest)" to pick 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.

Travel information

Origin airport
Purdue University
Destination airport
Washington Dulles Intl.
Roundtrip price
$249
Distance
513 mi

Book with confidence

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 November. 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 $234 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.

 

Lafayette to Washington Flights

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*Available to One Key members.