Cheap flights from Boston to Washington, D.C. Dulles Intl Airport from £48
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — IAD
5 Oct — 12 Oct1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Boston Logan Intl to Washington, D.C. Dulles Intl are usually found in December or January, booked 68 days in advance, depart on a Tuesday or Monday and return on a Monday
Cheap flight deals from Boston to Dulles Intl
Enter your travel dates to find the best prices.
Cheapest
Best
Direct
Last-minute
One-way
Cheapest flights from Boston to Dulles Intl
Explore the most affordable flight options available from Boston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 5 September 2026.
Sat 17/1005:45 -
Nonstop1h 35m
Sat 17/1017:15 -
Nonstop1h 52m
Deal found 3/9£123
Thu 24/905:45 -
Nonstop1h 35m
Fri 25/917:50 -
1 stop4h 55m
Deal found 3/9£128
Thu 1/1011:17 -
1 stop23h 00m
Sat 3/1009:33 -
1 stop25h 25m
Deal found 2/9£132
Fri 2/1006:00 -
1 stop5h 25m
Mon 12/1022:25 -
Nonstop1h 44m
Deal found 3/9£150
Fri 2/1006:00 -
1 stop5h 25m
Sat 3/1008:50 -
Nonstop1h 42m
Deal found 3/9£168
Wed 7/1005:45 -
Nonstop1h 35m
Fri 9/1006:45 -
1 stop5h 58m
Deal found 3/9£180
Best flights from Boston to Dulles Intl
Discover carefully curated flight deals from Boston to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 5 September 2026.
Tue 10/1105:30 -
1 stop5h 15m
Mon 16/1117:16 -
1 stop6h 38m
Deal found 5/9£212
Wed 23/1205:45 -
Nonstop1h 47m
Mon 28/1212:45 -
Nonstop1h 40m
Deal found 1/9£214
Thu 10/1219:33 -
Nonstop1h 34m
Tue 15/1206:00 -
1 stop4h 39m
Deal found 2/9£221
Wed 30/909:30 -
Nonstop1h 41m
Sat 3/1013:10 -
Nonstop1h 45m
Deal found 5/9£228
Fri 23/1005:45 -
Nonstop1h 35m
Mon 26/1017:15 -
Nonstop1h 42m
Deal found 2/9£228
Tue 6/1006:00 -
1 stop5h 25m
Tue 6/1017:15 -
Nonstop1h 51m
Deal found 1/9£251
Tue 6/1017:49 -
Nonstop2h 04m
Thu 8/1022:15 -
Nonstop1h 44m
Deal found 2/9£260
Wed 25/1105:30 -
Nonstop1h 40m
Mon 30/1122:19 -
Nonstop1h 40m
Deal found 2/9£260
Thu 12/1114:40 -
Nonstop1h 47m
Sun 15/1122:19 -
Nonstop1h 40m
Deal found 4/9£265
Thu 1/1012:36 -
1 stop3h 47m
Sat 3/1013:10 -
Nonstop1h 45m
Deal found 2/9£272
Fri 2/1007:38 -
1 stop3h 47m
Mon 5/1017:15 -
Nonstop1h 51m
Deal found 1/9£273
Sat 10/1005:45 -
Nonstop1h 35m
Tue 13/1022:15 -
Nonstop1h 44m
Deal found 3/9£274
Direct flights from Boston to Dulles Intl
Explore direct flight options from Boston to Dulles Intl based on user searches, and compare prices and availability for your desired travel dates. Data last updated 5 September 2026.
Sat 17/1005:45 -
Nonstop1h 35m
Sat 17/1017:15 -
Nonstop1h 52m
Deal found 3/9£123
Thu 24/905:45 -
Nonstop1h 35m
Fri 25/922:15 -
Nonstop1h 44m
Deal found 3/9£152
Fri 2/1005:45 -
Nonstop1h 35m
Mon 12/1022:25 -
Nonstop1h 44m
Deal found 3/9£155
Fri 2/1005:45 -
Nonstop1h 35m
Sat 3/1022:15 -
Nonstop1h 44m
Deal found 3/9£172
Wed 7/1005:45 -
Nonstop1h 35m
Fri 9/1022:15 -
Nonstop1h 44m
Deal found 3/9£183
Thu 8/1005:45 -
Nonstop1h 35m
Mon 12/1022:25 -
Nonstop1h 44m
Deal found 3/9£214
Sat 10/1005:45 -
Nonstop1h 35m
Tue 13/1022:15 -
Nonstop1h 44m
Deal found 2/9£223
Fri 6/1105:30 -
Nonstop1h 40m
Mon 9/1122:19 -
Nonstop1h 40m
Deal found 1/9£226
Thu 8/1005:45 -
Nonstop1h 35m
Sun 11/1022:15 -
Nonstop1h 44m
Deal found 4/9£228
Sat 10/1005:45 -
Nonstop1h 35m
Mon 12/1022:25 -
Nonstop1h 44m
Deal found 4/9£237
Wed 23/905:45 -
Nonstop1h 35m
Mon 28/915:09 -
Nonstop1h 50m
Deal found 4/9£239
Thu 31/1214:32 -
Nonstop1h 47m
Sun 3/108:40 -
Nonstop1h 40m
Deal found 31/8£240
Last-minute flights from Boston to Dulles Intl
Discover last-minute flight deals from Boston to Dulles Intl. Data last updated 5 September 2026 and is based on user searches.
Thu 24/905:45 -
Nonstop1h 35m
Fri 25/917:50 -
1 stop4h 55m
Deal found 3/9£128
Thu 1/1011:17 -
1 stop23h 00m
Sat 3/1009:33 -
1 stop25h 25m
Deal found 2/9£132
Fri 2/1006:00 -
1 stop5h 25m
Mon 12/1022:25 -
Nonstop1h 44m
Deal found 3/9£150
Fri 2/1006:00 -
1 stop5h 25m
Sat 3/1008:50 -
Nonstop1h 42m
Deal found 3/9£168
Wed 7/1005:45 -
Nonstop1h 35m
Fri 9/1006:45 -
1 stop5h 58m
Deal found 3/9£180
Sat 17/1005:45 -
Nonstop1h 35m
Sat 17/1017:15 -
Nonstop1h 52m
Deal found 3/9£123
One-way flights from Boston to Dulles Intl
Search for one-way flight options from Boston to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 5 September 2026.
Fri 2/1012:54 -
1 stop11h 16m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£48
Fri 13/1105:30 -
Nonstop1h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£52
Sat 17/1005:45 -
Nonstop1h 35m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£58
Wed 21/1010:51 -
1 stop5h 32m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£73
Wed 14/1009:30 -
Nonstop1h 41m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£78
Sat 26/917:56 -
1 stop5h 03m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£85
Wed 16/912:54 -
1 stop11h 16m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£86
Sun 22/1105:30 -
Nonstop1h 40m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£92
Wed 7/1009:15 -
1 stop7h 13m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 3/9£95
Wed 14/1008:02 -
1 stop4h 49m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 4/9£98
Thu 24/905:40 -
1 stop4h 41m
Wed 31/1200:00 -
Nonstop0h 00m
Deal found 2/9£99
Find flight deals from Boston to Dulles Intl
Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) 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 5 September 2026.
Customise your flight search to find flights from Boston 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 7,457,451 searches. Data last updated 5 September 2026.
Use the filters below to find and compare flights from Boston to Washington, D.C. Dulles Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
Cheapest return flight
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Wed 18/11
14:40-16:27
Nonstop1h 47m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£122
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Mon 22/2
14:16-16:04
Nonstop1h 48m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£129
Fastest return journey
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Thu 4/3
06:00-07:34
Nonstop1h 34m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£129
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Tue 16/2
06:00-07:34
Nonstop1h 34m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£129
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Sat 19/9
14:28-16:09
Nonstop1h 41m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£132
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Tue 15/9
05:40-10:21
1 stop4h 41m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£142
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Sun 4/10
05:45-07:20
Nonstop1h 35m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£147
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Fri 2/10
19:13-20:58
Nonstop1h 45m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£147
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Sun 11/10
05:45-07:20
Nonstop1h 35m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£148
BostonWashington, D.C.
BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl
BOSIAD
Boston Logan Intl
Tue 29/9
05:40-10:21
1 stop4h 41m
Washington, D.C. Dulles Intl
Wed 31/12
00:00-00:00
Nonstop0h 00m
£151
Flights are sorted by cheapest return flights first.
Deals found on 31/8
Showing 1-10 of 23 resultsSorted by cheapest first
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Best time to book a flight from Boston to Dulles Intl
Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Boston with our price prediction graph.
BOS-IAD
Estimated return 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 Boston to Washington, D.C. Dulles Intl Airport
Prices
Airlines
How far ahead should I book a flight from Boston to Washington, D.C. Dulles Intl Airport?
To ensure you get the cheapest price possible for a flight from Boston to Washington, D.C. Dulles Intl Airport, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from Boston to Washington, D.C. Dulles Intl Airport?
Currently, December is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of £183). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £274). 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 BOS to IAD?
Find hourly flight availability from Boston 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 5 September 2026.
When flying from Boston to Washington, D.C. Dulles Intl Airport, 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 for a return flight from Boston to Washington, D.C. Dulles Intl Airport?
Airfare is below average for this route at the moment.
Boston to Washington, D.C. Dulles Intl Airport flights typically cost between £164 and £274 in October.The cheapest return price found within the last 5 days was £123 on United Airlines (17 Oct–17 Oct).
Weekly flight availability from Boston to Washington, D.C. Dulles Intl Airport
Explore weekly flight availability from Boston to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 5 September 2026.
The most flights from BOS to IAD are scheduled on a Thursday (20 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 on average).
Related info for your journey
Find useful and relevant information for your journey from Boston 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 Boston to Washington, D.C. Dulles Intl?
Boston Logan Intl (BOS) is the airport you will fly out of if you book a flight from Boston to Washington, D.C. Dulles Intl. You should not have trouble finding flights to Washington, D.C. Dulles Intl from Logan Intl; the airport handles an average of 17 outbound flights to Washington, D.C. Dulles Intl per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Boston airport to Washington, D.C. Dulles Intl. It is only a 2.6 mi journey to Logan Intl (BOS) from Boston’s city center.
How long is the flight from Boston to Washington, D.C. Dulles Intl Airport?
There are many flights that can get you from Boston to Washington, D.C. Dulles Intl Airport in 1h 47m. Fly via Delta or United Airlines to get the fastest option. There are 411 mi between Boston and Washington, D.C. Dulles Intl Airport. Both multi-stop and direct flights can be found to your destination and back.
What are the most reliable airlines from Boston to Washington, D.C. Dulles Intl Airport?
The top 3 most reliable airlines when flying from Boston to Washington, D.C. Dulles Intl Airport are Egyptair (96%), Ethiopian Air (92%) and ANA (84%).
Can I find deals for flights from Boston to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Boston to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Boston to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Dulles Intl.
Can I find deals for business class flights from Boston to Dulles Intl?
Yes. Cheapflights offers flight deals from Boston 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 Boston to Washington, D.C. Dulles Intl Airport?
Currently, December is the cheapest month in which you can book a flight from Boston to Washington, D.C. Dulles Intl Airport (average of £183). Flying from Boston to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of £274). 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.
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 5 September 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Boston to Dulles Intl?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Boston to Dulles Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
Why should you use Cheapflights to find cheap flight tickets from Boston to Dulles Intl?
Cheapflights helps you find that perfect flight to Dulles Intl from Boston by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!
Can Cheapflights find flights from Boston to Dulles Intl with no change fees?
Yes, we can. To see specific flights from Boston to Dulles Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Boston to Dulles Intl become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Boston today and book when prices fit your budget.
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