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$135+ Cheap flights from Dulles Intl (IAD) to Buffalo (BUF)

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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BUF
Sep 12 — Sep 191
Sat 9/12
Sat 9/19
1 adult, Economy
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Cheap flight deals from Dulles Intl to Buffalo

Cheapest flights from Dulles Intl to Buffalo
Explore the most affordable flight options available from Dulles Intl to Buffalo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 13, 2026.

This Frontier deal was found by Cheapflights users on 8/11. 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.
Mon 8/1711:10 am -
1 stop7h 56m
Wed 8/1911:36 am -
1 stop11h 16m
Deal found 8/11$260
This United Airlines deal was found by Cheapflights users on 8/10. 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 9/1110:17 pm -
Nonstop1h 27m
Sun 9/136:10 am -
Nonstop1h 23m
Deal found 8/10$263
This United Airlines deal was found by Cheapflights users on 8/9. 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 8/2810:18 pm -
Nonstop1h 26m
Tue 9/12:53 pm -
Nonstop1h 20m
Deal found 8/9$264
This Delta deal was found by Cheapflights users on 8/12. 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.
Thu 10/296:05 am -
1 stop5h 30m
Sun 11/16:10 am -
1 stop5h 24m
Deal found 8/12$265
This Frontier deal was found by Cheapflights users on 8/10. 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 9/410:45 am -
1 stop7h 24m
Tue 9/811:36 am -
1 stop5h 38m
Deal found 8/10$266
This Priceline deal was found by Cheapflights users on 8/11. 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.
Wed 8/127:48 am -
1 stop6h 05m
Wed 8/1911:36 am -
1 stop5h 38m
Deal found 8/11$267
This United Airlines deal was found by Cheapflights users on 8/11. 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 9/510:18 pm -
Nonstop1h 26m
Sun 9/66:12 am -
Nonstop1h 23m
Deal found 8/11$268
This Delta deal was found by Cheapflights users on 8/10. 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.
Sat 10/35:15 pm -
1 stop5h 20m
Sun 10/47:44 pm -
1 stop3h 30m
Deal found 8/10$269
This Expedia deal was found by Cheapflights users on 8/13. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/214:52 pm -
1 stop25h 17m
Sun 8/239:29 pm -
1 stop12h 21m
Deal found 8/13$270
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/510:18 pm -
Nonstop1h 26m
Sat 9/1210:33 am -
Nonstop1h 22m
Deal found 8/12$274
This Expedia deal was found by Cheapflights users on 8/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/284:52 pm -
1 stop25h 17m
Sun 8/3011:36 am -
1 stop11h 16m
Deal found 8/12$275

Find flight deals from Dulles Intl to Buffalo

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Buffalo (BUF). 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 August 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$260
(United Airlines)

One-way from

$135
(Kiwi.com)

Popular in

April

Cheapest in

December

Average price

$369

Good round-trip deal

$317 or less

Good one-way deal

$289 or less
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Buffalo flight deals.
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Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Buffalo flights.
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From Washington, D.C. Dulles Intl to Buffalo
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Buffalo
Search Deals
Highest demand for flights based on searches. 6% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2026
Search Deals
Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Buffalo.
Search Deals
Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Buffalo.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Buffalo 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 August 13, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Buffalo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Tue 9/1

6:10 am-11:22 am

1 stop5h 12m

Buffalo

Thu 9/10

12:02 pm-4:30 pm

1 stop4h 28m

$269
Quickest round-trip

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Tue 2/2

12:35 pm-1:46 pm

Nonstop1h 11m

Buffalo

Sat 2/6

2:44 pm-4:03 pm

Nonstop1h 19m

$281

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Thu 9/10

10:17 pm-11:44 pm

Nonstop1h 27m

Buffalo

Sat 9/12

7:00 am-11:52 am

1 stop4h 52m

$314

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Sat 8/29

8:25 am-9:48 am

Nonstop1h 23m

Buffalo

Wed 9/2

7:59 pm-9:19 pm

Nonstop1h 20m

$319

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Wed 11/25

8:32 am-9:54 am

Nonstop1h 22m

Buffalo

Fri 11/27

6:00 am-7:28 am

Nonstop1h 28m

$319

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Fri 9/4

12:50 pm-2:18 pm

Nonstop1h 28m

Buffalo

Sun 9/6

6:12 am-7:35 am

Nonstop1h 23m

$328

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Sat 12/19

12:35 pm-1:46 pm

Nonstop1h 11m

Buffalo

Sun 12/20

7:30 pm-8:49 pm

Nonstop1h 19m

$340

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Fri 11/20

8:32 am-9:54 am

Nonstop1h 22m

Buffalo

Mon 11/23

7:52 pm-9:18 pm

Nonstop1h 26m

$344

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Wed 9/16

10:17 pm-11:44 pm

Nonstop1h 27m

Buffalo

Tue 9/22

2:53 pm-4:13 pm

Nonstop1h 20m

$345

Washington, D.C.Buffalo

IAD Washington, D.C. Dulles Intl - BUF Buffalo

IADBUF

Washington, D.C. Dulles Intl

Fri 10/16

12:55 pm-2:23 pm

Nonstop1h 28m

Buffalo

Sun 10/18

6:00 am-7:23 am

Nonstop1h 23m

$347

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/8

Showing 1-10 of 23 resultsSorted by cheapest first
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Compare providers for flights from Dulles Intl to Buffalo

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Buffalo in August.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Buffalo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Buffalo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Buffalo flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Buffalo flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Buffalo flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Buffalo

Have a flexible travel schedule? Discover the best time to fly to Buffalo from Dulles Intl 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 Washington, D.C. Dulles Intl Airport to Buffalo

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

Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buffalo (average of $284). Flying from Washington, D.C. Dulles Intl Airport to Buffalo in April is currently the most expensive (average of $397). 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 IAD to BUF?

Find hourly flight availability from Dulles Intl to Buffalo. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 13, 2026.

When flying from Washington, D.C. Dulles Intl Airport to Buffalo, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

Airfare is below average for this route at the moment.

Washington, D.C. Dulles Intl Airport to Buffalo flights typically cost between $327 and $502 in September.
The cheapest round-trip price found within the last 5 days was $260 on United Airlines (Sep 11-Sep 18).

Reviews of airlines servicing Buffalo

Get insights into the airlines that provide service to Buffalo. 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 Buffalo. Reviews last updated August 13, 2026.
Read reviews from past customers who have flown United Airlines from Washington, D.C. Dulles Intl Airport to Buffalo. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,114 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.
United Airlines
7.4
Good
10,114 reviews
United Airlines
7.4
Good
10,114 reviews

Overall

7.4

Boarding

7.7

Entertainment

7.1

Crew

8.1

Food

6.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

IAD - TYS

It was a short flight on a small express plane, so no time for amenities. Quickly on, quickly off. No complaints.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Buffalo. 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 into for flights to Buffalo from Washington, D.C. Dulles Intl?

    For a flight from Washington, D.C. Dulles Intl to Buffalo, you will be flying into Buffalo. Buffalo (BUF) is just 8.3 mi from the center of the city. Buffalo is the only Buffalo airport and it handles 6 inbound flights from Washington, D.C. Dulles Intl per day. 1 airline has flights to Buffalo from Washington, D.C. Dulles Intl on a regular basis.

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

    A quick flight from Washington, D.C. Dulles Intl Airport to Buffalo can take about 1h 11m. Delta provides one of the quickest options available for as low as $281. There are 284 mi between Washington, D.C. Dulles Intl Airport and Buffalo. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Currently priced at $179, United Airlines will fly you from Washington, D.C. Dulles Intl Airport to Buffalo and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. You may be able to fly from Washington, D.C. Dulles Intl Airport to Buffalo for 47% less than the average price by searching for this airline.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to Buffalo on time: GoJet (91%), United Airlines (87%), Republic Airways (81%).

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

    On average you can expect to pay $363 for a flight from Washington, D.C. Dulles Intl Airport to Buffalo. The cheapest flight overall is $143 while the most popular route, (Washington, D.C. Dulles Intl - Buffalo) is currently priced at $211.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Buffalo 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 Washington, D.C. Dulles Intl Airport to Buffalo?

    Currently, December is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Buffalo (average of $284). Flying from Washington, D.C. Dulles Intl Airport to Buffalo in April is currently the most expensive (average of $397). 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 Buffalo?

Book flights to Buffalo if you plan to visit one of these locations
Lockport
Cheektowaga
Amherst
Williamsville
Orchard Park
Eden
Bowmansville

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Top airline flying from Dulles Intl to Buffalo

Discover the top airline that operate flights from Dulles Intl to Buffalo. 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 August 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$179Average$349FlexibilityNo cancel feeOn-time69%

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