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C$81 Cheap Flights from Boston (BOSA) to Washington Dulles (IAD)

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      Travellers and cabin class, 1 Adult, Economy
      United
      Lufthansa
      Avianca
      Copa
      Austrian Airlines
      ANA (All Nippon Airways)

      Compare Boston to Washington Dulles flight deals

      Find the cheapest month or even day of the year to fly to Washington Dulles

      Book the best Washington Dulles fare with no extra fees

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      Flight deals from Boston to Washington Dulles

      Looking for a cheap last-minute deal or the best return flight from Boston to Washington Dulles Airport? If you want to travel next month, return fares start from C$161. Find the lowest prices on one-way and return tickets right here.
      Washington D.C..C$81 per passenger.Departing Wed., Nov. 11.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Wed., Nov. 11, arriving in Washington Dulles.Price includes taxes and charges.From C$81, select.
      Washington D.C..C$81 per passenger.Departing Tue., Dec. 8.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Tue., Dec. 8, arriving in Washington Dulles.Price includes taxes and charges.From C$81, select.
      Washington D.C..C$81 per passenger.Departing Tue., Mar. 2.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Tue., Mar. 2, arriving in Washington Dulles.Price includes taxes and charges.From C$81, select.
      Washington D.C..C$81 per passenger.Departing Sat., Jan. 16.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Sat., Jan. 16, arriving in Washington Dulles.Price includes taxes and charges.From C$81, select.
      Washington D.C..C$81 per passenger.Departing Fri., Feb. 19.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Fri., Feb. 19, arriving in Washington Dulles.Price includes taxes and charges.From C$81, select.
      Washington D.C..C$81 per passenger.Departing Tue., Oct. 27.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Tue., Oct. 27, arriving in Washington Dulles.Price includes taxes and charges.From C$81, select.
      Washington D.C..C$89 per passenger.Departing Tue., Sep. 22.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Boston Logan International on Tue., Sep. 22, arriving in Washington Dulles.Price includes taxes and charges.From C$89, select.
      Washington D.C..C$145 per passenger.Departing Sun., Sep. 20.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Sun., Sep. 20, arriving in Washington Dulles.Price includes taxes and charges.From C$145, select.
      Washington D.C..C$157 per passenger.Departing Sat., May 1.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Sat., May 1, arriving in Washington Dulles.Price includes taxes and charges.From C$157, select.
      Washington D.C..C$157 per passenger.Departing Fri., Jun. 4.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Fri., Jun. 4, arriving in Washington Dulles.Price includes taxes and charges.From C$157, select.
      Washington D.C..C$157 per passenger.Departing Thu., Apr. 1.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Thu., Apr. 1, arriving in Washington Dulles.Price includes taxes and charges.From C$157, select.
      Washington D.C..C$157 per passenger.Departing Tue., Jul. 6.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Tue., Jul. 6, arriving in Washington Dulles.Price includes taxes and charges.From C$157, select.
      Washington D.C..C$237 per passenger.Departing Sun., Aug. 30.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Boston Logan International on Sun., Aug. 30, arriving in Washington Dulles.Price includes taxes and charges.From C$237, select.
      Washington D.C..C$319 per passenger.Departing Mon., Aug. 31.One-way flight with United.Outbound direct flight with United departs from Boston Logan International on Mon., Aug. 31, arriving in Washington Dulles.Price includes taxes and charges.From C$319, select.

      Find the cheapest month to fly from Boston to Washington Dulles

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Boston to Washington Dulles flights are currently cheapest in October.
      Aug.
      from C$237
      Sep.
      from C$89
      Oct.
      from C$81
      Nov.
      from C$81
      Dec.
      from C$81
      Jan.
      from C$81
      Feb.
      from C$81
      Mar.
      from C$81
      Apr.
      from C$157
      May
      from C$157
      Jun.
      from C$157
      Jul.
      from C$157

      Which airlines fly from Boston to Washington Dulles?

      Air China
      ANA (All Nippon Airways)
      Austrian Airlines
      Avianca
      Brussels Airlines
      Copa
      EgyptAir
      Ethiopian Airlines
      ITA Airways
      Lufthansa
      United

      Boston to Washington Dulles: Alternative routes

      Compare routes from Boston to Washington D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

      Washington Ronald Reagan

      5km from central Washington D.C.
      ClosestCheapest
      from C$80
      Search flights

      Washington Dulles

      37km from central Washington D.C.
      from C$81
      Search flights

      Baltimore Washington International

      44km from central Washington D.C.
      from C$81
      Search flights

      Boston to Washington D.C.: Flight information

      The things to know before you go.
      Cheapest flight foundC$81
      Cheapest month to flyJanuary
      Average flight time1 hr, 43 mins
      Most popular airlineUnited
      Average flights per week274

      Finding cheap flights from Boston to Washington Dulles: Frequently asked questions

      The best price we found for a return flight from Boston to Washington Dulles is C$161. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      1 hour and 43 minutes is the average flight time from Boston to Washington Dulles.
      United, Lufthansa and Avianca fly direct from Boston to Washington Dulles.
      As of August 2026, there are 274 flights per week flying from Boston to Washington Dulles.
      The cheapest month to fly from Boston to Washington Dulles is usually September.
      After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Boston to Washington Dulles Airport on Tuesday, September 29, 2026.
      Yes – the average flight time is 1 hour and 43 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

      The cheapest airline that flies to Washington Dulles is United .

      How to find cheap flights to Washington Dulles from Boston

      Looking for cheap tickets from Boston to Washington Dulles? Here are a few tips on how to secure the best flight price and make your journey as smooth as possible.

      • Simply hit "search." From Delta Air Lines to international carriers like Emirates, we compare all major airlines along with the most popular online travel agents to find the cheapest plane tickets from Boston to Washington Dulles. And with us, there are no hidden fees – what you see is what you pay.
      • Compare flight deals to Washington Dulles from Boston from over 1,000 providers. Then choose the cheapest plane tickets or fastest journeys.
      • Flex your dates to find the best Boston–Washington Dulles ticket prices. If you're flexible when it comes to your travel dates, use Skyscanner's "Whole month" tool to find the cheapest month, and even day to fly to Washington Dulles from Boston.
      • Set up a Price Alert. You can easily track the fare of your cheap Boston–Washington Dulles flights by creating an alert. Whenever prices go down or up, you'll get an email or push notification to help make sure you get the best possible flight deal.
      • Fly without stops. Only interested in direct flights between Boston and Washington Dulles? Make sure to tick "Direct flights only" when performing a search. If there are direct flights available on the route, these will appear in the results.
      • Find the cheapest Business Class flights from Boston and Washington Dulles. We scour the Internet for the best Business, Premium Economy and First Class flight fares to Washington Dulles, too. Check the difference in price as you search – you might just stumble on a last-minute low fare. Note that not all cabin classes are available for every destination or airline.
      • Include nearby airports in your search. Widen your search for Boston to Washington Dulles flight deals by selecting the "add nearby airports" option. This will allow you to see flight prices for all the nearest airports at your departure point and your destination and could help you save the next time you travel.

        • Combine your flight to Washington Dulles from Boston with hotels and car rental

        Once you've secured your cheap flight ticket from Boston to Washington Dulles, discover the best prices and exclusive rates for hotels in Washington Dulles or nearby. You can also compare hundreds of car rental companies at once so you get the best car rental price for your trip.


      Plan the rest of your trip from Boston to Washington D.C.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.