HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$106+ Cheap flights from Buffalo (BUF) to Dulles Intl (IAD)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
BUF — IAD
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Buffalo to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Buffalo to Washington, D.C. Dulles Intl are usually found in June or May, booked 62 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Buffalo to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Buffalo (BUF) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$179
(United Airlines)

One-way from

$106
(Frontier)

Popular in

October

Cheapest in

June

Average price

$254

Good round-trip deal

$351 or less

Good one-way deal

$178 or less
From Buffalo to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Buffalo to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($17 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals
Price to beat on a round-trip flight from Buffalo to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Buffalo to Washington, D.C. Dulles Intl.
Search Deals

Find flight deals from Buffalo to Dulles Intl

Cheapest flights from Buffalo to Dulles Intl
Explore the most affordable flight options available from Buffalo to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3010:37 amBUF - IAD
Nonstop1h 18mUnited Airlines
Sun 11/28:25 amIAD - BUF
Nonstop1h 24mUnited Airlines
Deal found 9/16$179
This Frontier deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/312:17 pmBUF - IAD
1 stop11h 22mFrontier
Sun 10/510:09 pmIAD - BUF
2 stops13h 13mFrontier
Deal found 9/16$186
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/37:45 pmBUF - IAD
Nonstop1h 22mUnited Airlines
Mon 10/68:20 amIAD - BUF
Nonstop1h 23mUnited Airlines
Deal found 9/17$189
This Frontier deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/309:04 pmBUF - IAD
2 stops19h 30mFrontier
Sun 11/25:00 amIAD - BUF
1 stop7h 47mFrontier
Deal found 9/16$190
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/197:30 pmBUF - IAD
Nonstop1h 24mUnited Airlines
Sat 11/2212:48 pmIAD - BUF
Nonstop1h 32mUnited Airlines
Deal found 9/16$191
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/810:28 amBUF - IAD
Nonstop1h 17mUnited Airlines
Sun 10/128:20 amIAD - BUF
Nonstop1h 23mUnited Airlines
Deal found 9/16$192
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:30 pmBUF - IAD
Nonstop1h 24mUnited Airlines
Mon 11/312:48 pmIAD - BUF
Nonstop1h 32mUnited Airlines
Deal found 9/15$194
This Priceline deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/251:23 pmBUF - IAD
1 stop6h 46mFrontier
Fri 9/266:10 amIAD - BUF
1 stop5h 12mFrontier
Deal found 9/16$196
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/177:30 pmBUF - IAD
1 stop3h 30mDelta
Mon 10/207:59 pmIAD - BUF
1 stop3h 57mDelta
Deal found 9/15$199
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2010:37 amBUF - IAD
Nonstop1h 18mUnited Airlines
Sun 11/238:25 amIAD - BUF
Nonstop1h 24mUnited Airlines
Deal found 9/16$203
This United Airlines deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/3110:37 amBUF - IAD
Nonstop1h 18mUnited Airlines
Mon 11/312:48 pmIAD - BUF
Nonstop1h 32mUnited Airlines
Deal found 9/17$206
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/177:45 pmBUF - IAD
Nonstop1h 22mUnited Airlines
Mon 10/208:20 amIAD - BUF
Nonstop1h 23mUnited Airlines
Deal found 9/16$208

Cheapflights Fare Finder

 
Customize your flight search to find flights from Buffalo to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Buffalo to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Buffalo

Fly to

Dulles Intl

Route

Depart

Return

Price

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Wed 11/19

10:37 am-11:55 am

Nonstop1h 18m

Washington, D.C. Dulles Intl

Sun 11/23

12:48 pm-2:20 pm

Nonstop1h 32m

$191

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Fri 10/17

7:30 pm-11:00 pm

1 stop3h 30m

Washington, D.C. Dulles Intl

Mon 10/20

7:59 pm-11:56 pm

1 stop3h 57m

$199

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Fri 10/3

7:45 pm-9:07 pm

Nonstop1h 22m

Washington, D.C. Dulles Intl

Sun 10/5

8:20 am-9:43 am

Nonstop1h 23m

$199

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Tue 10/21

7:30 pm-11:00 pm

1 stop3h 30m

Washington, D.C. Dulles Intl

Sat 10/25

6:05 am-9:50 am

1 stop3h 45m

$199

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Sat 11/1

12:38 pm-4:29 pm

1 stop3h 51m

Washington, D.C. Dulles Intl

Mon 11/3

7:59 pm-11:56 pm

1 stop3h 57m

$199

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Fri 10/17

7:45 pm-9:07 pm

Nonstop1h 22m

Washington, D.C. Dulles Intl

Mon 10/20

8:20 am-9:43 am

Nonstop1h 23m

$208

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Fri 10/17

7:45 pm-9:07 pm

Nonstop1h 22m

Washington, D.C. Dulles Intl

Sun 10/19

8:20 am-9:43 am

Nonstop1h 23m

$217

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Thu 11/20

10:37 am-11:55 am

Nonstop1h 18m

Washington, D.C. Dulles Intl

Sun 11/23

8:25 am-9:49 am

Nonstop1h 24m

$220

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Fri 11/14

7:00 am-11:31 am

1 stop4h 31m

Washington, D.C. Dulles Intl

Mon 11/17

7:49 pm-11:59 pm

1 stop4h 10m

$229

BuffaloWashington, D.C.

BUF - IAD

BUFIAD

Buffalo

Thu 10/9

7:30 pm-11:00 pm

1 stop3h 30m

Washington, D.C. Dulles Intl

Mon 10/13

7:59 pm-11:56 pm

1 stop3h 57m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 17 results
1
2

Best time to book a flight from Buffalo to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Buffalo with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Buffalo to Washington, D.C. Dulles Intl Airport

How far ahead should I book a flight from Buffalo to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from Buffalo to Dulles Intl. Price data was last updated on September 12, 2025.

Booking 62 days in advance of your planned departure date is, on average, the best time to get cheap flights from Buffalo to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Buffalo to Washington, D.C. Dulles Intl Airport?

Currently, August is the cheapest month in which you can book a flight from Buffalo to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Buffalo to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from BUF to IAD?

Find hourly flight availability from Buffalo to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 57% on flights from Buffalo to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the morning.

What is the cheapest day to fly from Buffalo to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from Buffalo to Dulles Intl. Price data was last updated on September 14, 2025.

Travelers seeking maximum savings on their Buffalo to Washington, D.C. Dulles Intl Airport flight should consider departing on Friday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Buffalo to Washington, D.C. Dulles Intl Airport?

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated September 17, 2025.
Get a feel of what it's like to fly with United Airlines from Buffalo to Washington, D.C. Dulles Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!
United Airlines
7.4
Good
8,926 reviews
United Airlines
7.4
Good
8,926 reviews

Entertainment

7.1

Food

6.6

Comfort

7.3

Overall

7.4

Boarding

7.7

Crew

8.1

Reviews

1 / 20
2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Find useful and relevant information for your journey from Buffalo to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Buffalo to Washington, D.C. Dulles Intl?

    Most people fly from Buffalo (BUF) if they book a flight from Buffalo to Washington, D.C. Dulles Intl. On average, Buffalo has 9 outbound flights to Washington, D.C. Dulles Intl per day from 1 airline. Buffalo is conveniently located just 8.3 mi from Buffalo’s city center.

  • How long is the flight from Buffalo to Washington, D.C. Dulles Intl Airport?

    United Airlines and Delta can get you from Buffalo to Washington, D.C. Dulles Intl Airport in just under 1h 18m. Your travel time can differ by up to 2h 12m. Buffalo and Washington, D.C. Dulles Intl Airport are separated by a distance of 284 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Buffalo to Washington, D.C. Dulles Intl Airport round-trip?

    According to our current data, United Airlines ($188), offers the cheapest pricing from Buffalo to Washington, D.C. Dulles Intl Airport. United Airlines is priced at 28% lower than the current average price of a flight leaving 3 months from now.

  • What are the most reliable airlines from Buffalo to Washington, D.C. Dulles Intl Airport?

    Before booking your flight to Washington, D.C. Dulles Intl Airport from Buffalo, check out the most reliable airlines to get you to your destination on time: Mesa Airlines (98%), United Airlines (92%), GoJet( 92%).

  • What are the cheapest flights from Buffalo to Washington, D.C. Dulles Intl Airport?

    Looking for the cheapest flight from Buffalo to Washington, D.C. Dulles Intl Airport? While on average our users pay $873, our data indicates the cheapest price to be $108. The most popular route (Buffalo - Washington, D.C. Dulles Intl), is priced around $179.

  • Can I find deals for flights from Buffalo to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Buffalo to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Buffalo to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Buffalo to Dulles Intl.

  • Can I find deals for business class flights from Buffalo to Dulles Intl?

    Yes. Cheapflights offers flight deals from Buffalo to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Buffalo to Washington, D.C. Dulles Intl Airport?

    Currently, August is the cheapest month in which you can book a flight from Buffalo to Washington, D.C. Dulles Intl Airport (average of $292). Flying from Buffalo to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Gaithersburg
Fredericksburg
Linthicum Heights
Fairfax
Falls Church
Owings Mills
Manassas
Rockville
Hanover
Oxon Hill
Laurel
Towson
National Harbor
Dundalk

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Buffalo to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Dulles Intl flights
John F Kennedy Intl to Reagan-National flights
LaGuardia to Reagan-National flights
Newark to Dulles Intl flights
LaGuardia to Dulles Intl flights
Newark to Reagan-National flights
LaGuardia to Baltimore flights
John F Kennedy Intl to Baltimore flights
Newark to Baltimore flights
Albany to Reagan-National flights
Buffalo to Reagan-National flights
Rochester to Baltimore flights
Syracuse to Dulles Intl flights
Rochester to Reagan-National flights
Buffalo to Baltimore flights
Rochester to Dulles Intl flights
Albany to Dulles Intl flights
Syracuse to Reagan-National flights
Syracuse to Baltimore flights
White Plains to Dulles Intl flights
Albany to Baltimore flights
White Plains to Reagan-National flights
White Plains to Baltimore flights
Stewart to Baltimore flights
Islip to Baltimore flights
Ithaca to Reagan-National flights
Ithaca to Dulles Intl flights
Islip to Reagan-National flights
Stewart to Dulles Intl flights
Saranac Lake to Reagan-National flights
Rutland to Reagan-National flights
Ithaca to Baltimore flights
Binghamton to Reagan-National flights
Binghamton to Dulles Intl flights
Elmira to Reagan-National flights
Rutland to Baltimore flights
Elmira to Baltimore flights
Watertown to Reagan-National flights
Stewart to Reagan-National flights
Plattsburgh to Baltimore flights
Rutland to Dulles Intl flights
Saranac Lake to Baltimore flights
Watertown to Baltimore flights
Saranac Lake to Dulles Intl flights
Niagara Falls to Baltimore flights

Top airline flying from Buffalo to Dulles Intl

Discover the top airline that operate flights from Buffalo to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$188Average$268FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.