BOS - IAD

$64 Find Cheap Flights from Boston to Washington Dulles Airport - Compare and Save

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Everything you should know

Cheapest round-trip
$117
Typical prices: $226-$377
United Airlines
Tue 1/16Thu 1/18
BOS - IAD • Non-stop
Cheapest one-way
$64
Typical prices: $134-$264
United Airlines
Sun 1/28
BOS - IAD • 1 stop
Nonstop flights
You can fly direct with United Airlines. Average duration is 1h 46m
Direct flights
+1
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 25 weeks in advance save around 49% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 14% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $257 (round-trip)
Shortest trip • 4h 21m (one-way)
Insights
Insights
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We hope you love your trip to Washington, D.C. Dulles Intl Airport!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Boston to Dulles Intl (BOS-IAD)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to Dulles Intl

Sat, Jan 16 - Mon, Jan 18
United Airlines Logo
5:45 am - 7:19 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
1h 34mnonstop
United Airlines Logo
10:19 pm - 11:49 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
1h 30mnonstop
$117United Airlines
Tue, Nov 3 - Tue, Nov 3
United Airlines Logo
5:30 am - 7:10 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
1h 40mnonstop
United Airlines Logo
10:19 pm - 11:59 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
1h 40mnonstop
$117United Airlines
Sun, Dec 13 - Tue, Dec 15
United Airlines Logo
5:45 am - 7:25 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
1h 40mnonstop
United Airlines Logo
8:40 am - 10:19 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
1h 39mnonstop
$117United Airlines
Sun, Nov 8 - Fri, Nov 13
United Airlines Logo
5:30 am - 7:10 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
1h 40mnonstop
United Airlines Logo
10:19 pm - 11:59 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
1h 40mnonstop
$117United Airlines
Fri, Dec 11 - Sun, Dec 13
Frontier Logo
11:34 am - 5:47 pmBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
6h 13m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
10:33 pm - 10:39 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
12h 06m1 stop Atlanta Hartsfield-Jackson
$133Frontier
Wed, Oct 21 - Sun, Oct 25
Frontier Logo
12:57 pm - 12:21 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
11h 24m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
11:12 am - 11:02 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
23h 50m1 stop Orlando
$133Frontier
Sat, Dec 12 - Sun, Dec 13
Frontier Logo
11:34 am - 5:47 pmBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
6h 13m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
10:33 pm - 10:39 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
12h 06m1 stop Atlanta Hartsfield-Jackson
$133Frontier
Sat, Nov 7 - Sun, Nov 8
Delta Logo
6:00 am - 11:50 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
5h 50m1 stop New York John F Kennedy Intl
Delta Logo
6:32 pm - 11:05 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
4h 33m1 stop New York John F Kennedy Intl
$249Delta
Thu, Nov 12 - Sun, Nov 15
Delta Logo
9:15 am - 4:26 pmBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
7h 11m1 stop Detroit Metropolitan Wayne County
Delta Logo
6:20 pm - 10:55 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
4h 35m1 stop New York John F Kennedy Intl
$249Delta
Sun, Nov 1 - Sun, Nov 8
Delta Logo
6:00 am - 11:50 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
5h 50m1 stop New York John F Kennedy Intl
Delta Logo
6:32 pm - 11:05 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
4h 33m1 stop New York John F Kennedy Intl
$249Delta
Booking Insights

Price, demand and travel trends for Boston to Washington, D.C. Dulles Intl Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Boston to Washington, D.C. Dulles Intl Airport?

Round-trip flights from Boston to Washington, D.C. Dulles Intl Airport typically range from $226 to $377. The lowest price found in the past 5 days was $117, on United Airlines.

What's the cheapest day of the week to fly from Boston to Washington, D.C. Dulles Intl Airport?

Based on deals KAYAK users found in the last 12 months, Wednesday is the cheapest day of the week to fly from Boston to Washington, D.C. Dulles Intl Airport. It’s 15% cheaper than the average day, while Monday is the most expensive, with prices 10% higher.

What’s the cheapest month to fly from Boston to Washington, D.C. Dulles Intl Airport?

•December is the cheapest month to fly from Boston to Washington, D.C. Dulles Intl Airport at $247 round-trip.
•June ($372) and July ($344) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 50% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Boston to Washington, D.C. Dulles Intl Airport the cheapest?

Flights from Boston to Washington, D.C. Dulles Intl Airport are cheapest 25 weeks before departure. Booking in this window typically costs about 49% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Boston to Dulles Intl

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Ethiopian Air

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Stefanie Waldek

Stefanie Waldek

Expert on United Airlines and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on BOS

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Key details for Boston to Washington, D.C. Dulles Intl Airport flights

Low season

February

Cheapest flight

$64
Beat the crowds with an average 44% drop in travelers.
The most popular month to fly with an average 26% increase in travelers.
One-way flight from Boston to Washington, D.C. Dulles Intl Airport

When to book flights from Boston to Dulles Intl

Are your dates flexible? Find out the best times to travel from Boston to Dulles Intl based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Boston to Washington, D.C. Dulles Intl Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Boston to Washington, D.C. Dulles Intl Airport?

    These are the earliest and latest flight times available from Boston to Washington, D.C. Dulles Intl Airport:

    • Earliest: departs at 5:30 am and lands at 7:16 am
    • Latest: departs at 7:49 pm and lands at 9:35 pm.

    The flight takes about 1h 46m.

  • What cabin classes can I book on flights from Boston to Washington, D.C. Dulles Intl Airport?

    Two cabin classes are available on flights from Boston to Washington, D.C. Dulles Intl Airport:

    • Economy Class
    • First Class

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

    A nonstop flight from Boston to Washington, D.C. Dulles Intl Airport takes 1h 46m, covering 411 miles.

  • Do I need a passport to fly from Boston to Washington, D.C. Dulles Intl Airport?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Boston to Washington, D.C. Dulles Intl Airport flight?

    Round-trip flights from Boston to Washington, D.C. Dulles Intl Airport range from $226 to $377, with an average of $287 over the past 12 months. Anything below $226 counts as a good deal.

  • How expensive are last-minute Boston to Washington, D.C. Dulles Intl Airport flights?

    Last-minute fares on this route (booked within two weeks of departure) run 22% above the $287 route average. Book 25 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Boston to Washington, D.C. Dulles Intl Airport?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $257 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $289 for nonstop.

  • What is the standard checked-bag allowance on flights from Boston to Washington, D.C. Dulles Intl Airport?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$80 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Boston to Washington, D.C. Dulles Intl Airport?

    The Boeing 737-900 family is used most often on this route, operated mainly by United Airlines. Other aircraft seen on the route include Boeing 737 MAX 9 variants.

  • How are flight departures from Boston to Washington, D.C. Dulles Intl Airport spread across the day?

    Morning is the busiest departure period on Boston to Washington, D.C. Dulles Intl Airport flights, with 50% of flights leaving in that window. Afternoon departures account for 25%, evening flights for 25%, and night flights for 0%.

  • How are flight prices from Boston to Washington, D.C. Dulles Intl Airport looking right now?

    One-way fares from Boston to Washington, D.C. Dulles Intl Airport are currently lower than usual. Average one-way flight prices are about $82, which is 57% below the typical average for this route.

  • What car rental options are available at Washington, D.C. Dulles Intl Airport (IAD)?

    Washington, D.C. Dulles Intl Airport (IAD) hosts 5 major car rental companies, with daily rates starting from around $24 for economy cars. Top options include:

    • Dollar
    • Budget
    • Hertz
    • Sixt
    • Thrifty

  • Which airports can I use when flying from Boston to Washington, D.C. Dulles Intl Airport?

    Flights from Boston to Washington, D.C. Dulles Intl Airport usually depart from Boston Logan Intl (BOS) and arrive at Washington, D.C. Dulles Intl (IAD).

  • Which airports do connecting flights from Boston to Washington, D.C. Dulles Intl Airport pass through?

    One-stop flights from Boston to Washington, D.C. Dulles Intl Airport most commonly connect through:

    • Atlanta Hartsfield-Jackson (ATL) - 36% of one-stop connections
    • Charlotte Douglas (CLT) - 23% of one-stop connections
    • Newark (EWR) - 18% of one-stop connections
    • New York John F Kennedy Intl (JFK) - 9% of one-stop connections

  • Can I save money by using flexible dates for flights from Boston to Washington, D.C. Dulles Intl Airport?

    Yes. Flexible dates can save you up to 23% on flights from Boston to Washington, D.C. Dulles Intl Airport. Wednesday is the cheapest departure day at $246 round-trip on average, while Monday is the most expensive at $317, a difference of $71.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from Boston to Washington, D.C. Dulles Intl Airport?

    Only United Airlines operates flights between Boston and Washington, D.C. Dulles Intl Airport.

  • How much time can I save by choosing a different layover airport from Boston to Washington, D.C. Dulles Intl Airport?

    Flying via Newark (EWR) gives the shortest average 1-stop total travel time at 4h 21m, compared with 4h 48m via Detroit Metropolitan Wayne County (DTW) and 5h 21m via Charlotte Douglas (CLT).

  • What popular places can I visit in Washington, D.C. Dulles Intl Airport?

    Some of the most popular sights in Washington, D.C. Dulles Intl Airport are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. Dulles Intl Airport on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Boston to Washington, D.C. Dulles Intl Airport flights?

    Among airlines operating Boston to Washington, D.C. Dulles Intl Airport flights:

    • United Airlines: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Boston to Washington, D.C. Dulles Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • United Airlines: a cabin bag and a checked bag in Economy Class
    • JetBlue: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

  • Where should I park my car if I drive to BOS?

    BOS is home to several parking garages. It is also surrounded by several off-site garages. If you want to park your car at a parking garage near this airport, you should consider parking it in one of its off-site garages. This is because off-site garages charge lower rates than on-site ones.

  • Apart from IAD, which other airports serve Washington?

    Washington is served by IAD, Ronald Reagan Washington National Airport (DCA), and Baltimore/Washington International Airport (BWI). If you don’t want to land at IAD, you should opt to land at DCA, as it is closer to Washington and its surroundings than BWI.

  • Is there an on-site hotel at IAD?

    If you would like to stay at a hotel near IAD, you can do so, as this Washington airport is home to Sleepbox Lounge. Found between Gates A6 and A14, near the AeroTrain in Concourse A, this hotel features elite amenities. This hotel’s rooms are relatively cheaper than most hotels near the airport, so staying in it would be economically wise.

  • Is it possible to rent a car at IAD?

    IAD is home to car rental agencies like Avis, Budget, Dollar, Enterprise, Hertz, and National. The counters for these car rentals are within the airport’s terminal complex. Given that all these car rentals are reliable, if you want to rent a car at IAD, you’ll have many agencies to hire from.

Your guide to booking Boston to Washington, D.C. Dulles Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure and avoid flying on Monday. On this route, Wednesday flights average $246, about $71 less than Monday fares (22% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 25 weeks before you fly. On this route, that window historically saves about 49% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Boston to Washington, D.C. Dulles Intl Airport trip for December. Fares historically average $247 round-trip in that month - typically $125 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Atlanta Hartsfield-Jackson Airport (ATL) can be cheaper than flying direct. The cheapest layover option averages $257 round-trip on this route - about $32 less than direct flights (based on the last 12 months).
  • Boston Logan International Airport (BOS) is one of the most used airports globally. As a result, you’ll likely encounter slow-moving traffic and long lines at its security checkpoints when entering this airport. To have enough time to navigate the traffic and be cleared at the checkpoints, you should reach this airport no less than 2h before your flight on the date you're set to fly from it.
  • If you are journeying from BOS to Dulles International Airport (IAD) with your kids, you should let them have fun in one of BOS’s children’s play areas. These playgrounds are near Gate 18 in Terminal A, Gate 30 in Terminal B, and Gate 25 in Terminal C. It’s worth stating that in any, your kids will have a good time, as they all feature several toys and child-proof playgrounds.
  • In case you’re traveling to Washington with your pet while waiting for your flight at BOS, you can let it relieve itself in one of the airport’s designated pet relief areas. The relief areas at this airport are on the Arrival level curb of every terminal and across Gate E7 in Terminal E.
  • If you’re in no rush to depart IAD, you should consider visiting Be Relax Spa. This spa, located near Gate A32, has dedicated staff and proper spa equipment. As it offers its services at pocket-friendly rates, you will enjoy quality service without incurring a hefty bill here.
  • You can pray, meditate, or reflect privately at IAD, as the airport features a chapel. This interfaith chapel, near Gate A32 on Concourse A, is normally open 24/7.

Prefer to fly direct from Boston to Washington Dulles Airport?

 
Find which airlines fly direct from Boston Logan Intl Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

Boston Logan Intl to Washington, D.C. Dulles Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Washington, D.C. Dulles Intl to Boston Logan Intl

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

More options for your flight from Boston to Dulles Intl

Complete your trip to Washington, D.C. with a hotel stay or car rental