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Cheap flights from Boston to Washington, D.C. from $89

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to Washington, D.C. departing on 5/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:45 am - 7:25 am
BOS
-
IAD
1h 40mnonstop
United Airlines Logo
10:15 pm - 11:59 pm
IAD
-
BOS
1h 44mnonstop
$174United Airlines
Mon, Apr 27 - Mon, May 4
United Airlines Logo
9:30 am - 11:13 am
BOS
-
IAD
1h 43mnonstop
United Airlines Logo
10:15 pm - 11:59 pm
IAD
-
BOS
1h 44mnonstop
$175United Airlines
Wed, Apr 29 - Sun, May 3
United Airlines Logo
5:45 am - 7:25 am
BOS
-
IAD
1h 40mnonstop
United Airlines Logo
8:22 am - 10:04 am
IAD
-
BOS
1h 42mnonstop
$176United Airlines
Wed, Apr 15 - Wed, Apr 22
United Airlines Logo
5:45 am - 7:25 am
BOS
-
IAD
1h 40mnonstop
United Airlines Logo
5:10 pm - 7:06 pm
IAD
-
BOS
1h 56mnonstop
$177United Airlines
Sat, Apr 11 - Tue, Apr 14
United Airlines Logo
5:45 am - 7:25 am
BOS
-
IAD
1h 40mnonstop
United Airlines Logo
5:42 pm - 10:14 pm
IAD
-
BOS
4h 32m
1 stop
$179United Airlines
Tue, Apr 14 - Tue, May 5
Frontier Logo
5:30 am - 4:39 pm
BOS
-
IAD
11h 09m
1 stop
Frontier Logo
5:44 pm - 1:26 am
IAD
-
BOS
7h 42m
1 stop
$180Frontier
Thu, Apr 9 - Fri, Apr 10
Frontier Logo
12:42 pm - 12:36 am
BOS
-
IAD
11h 54m
1 stop
Frontier Logo
6:19 pm - 1:31 am
IAD
-
BOS
7h 12m
1 stop
$181Frontier
Mon, Apr 13 - Mon, Apr 20
Frontier Logo
6:00 am - 6:42 pm
BOS
-
IAD
12h 42m
1 stop
Frontier Logo
7:43 pm - 7:49 am
IAD
-
BOS
12h 06m
1 stop
$182Frontier
Thu, Apr 30 - Mon, May 4
United Airlines Logo
5:45 am - 7:24 am
BOS
-
IAD
1h 39mnonstop
United Airlines Logo
10:15 pm - 11:59 pm
IAD
-
BOS
1h 44mnonstop
$183United Airlines
Fri, May 1 - Sun, May 3
United Airlines Logo
2:37 pm - 4:23 pm
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
8:23 am - 1:29 pm
IAD
-
BOS
5h 06m
1 stop
$184United Airlines
Sat, Apr 25 - Tue, Apr 28

Frontier flights from Boston to Washington, D.C. Dulles Intl Airport

Our best Frontier deals on Boston to Washington, D.C. Dulles Intl Airport flight tickets
Frontier
Apr 9
BOS12:42 pmBoston Logan Intl
11h 54m
1 stop
IAD12:36 amWashington, D.C. Dulles Intl
Apr 13
IAD8:30 pmWashington, D.C. Dulles Intl
13h 51m
1 stop
BOS10:21 amBoston Logan Intl
$180
Frontier
Apr 7
BOS12:42 pmBoston Logan Intl
11h 54m
1 stop
IAD12:36 amWashington, D.C. Dulles Intl
Apr 20
IAD6:19 pmWashington, D.C. Dulles Intl
7h 12m
1 stop
BOS1:31 amBoston Logan Intl
$181
Frontier
Apr 30
BOS6:00 amBoston Logan Intl
12h 42m
1 stop
IAD6:42 pmWashington, D.C. Dulles Intl
May 4
IAD7:43 pmWashington, D.C. Dulles Intl
12h 06m
1 stop
BOS7:49 amBoston Logan Intl
$182

United Airlines flights from Boston to Washington, D.C. Dulles Intl Airport

Our best United Airlines deals on Boston to Washington, D.C. Dulles Intl Airport flight tickets
United Airlines
Apr 27
BOS5:45 amBoston Logan Intl
1h 40m
IAD7:25 amWashington, D.C. Dulles Intl
May 4
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
BOS11:59 pmBoston Logan Intl
$174
United Airlines
Apr 29
BOS9:30 amBoston Logan Intl
1h 43m
IAD11:13 amWashington, D.C. Dulles Intl
May 3
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
BOS11:59 pmBoston Logan Intl
$175
United Airlines
May 8
BOS5:45 amBoston Logan Intl
1h 39m
IAD7:24 amWashington, D.C. Dulles Intl
May 10
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
BOS11:59 pmBoston Logan Intl
$176

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated March 30, 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 round-trip

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 4/27

5:45 am-7:25 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Mon 5/4

10:15 pm-11:59 pm

Nonstop1h 44m

$174

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 4/29

9:30 am-11:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Sun 5/3

10:15 pm-11:59 pm

Nonstop1h 44m

$175
Quickest round-trip

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 4/15

5:45 am-7:25 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Wed 4/22

8:22 am-10:04 am

Nonstop1h 42m

$176

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 4/11

5:45 am-7:25 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Tue 4/14

5:10 pm-7:06 pm

Nonstop1h 56m

$177

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 4/14

5:45 am-7:25 am

Nonstop1h 40m

Washington, D.C. Dulles Intl

Tue 5/5

5:42 pm-10:14 pm

1 stop4h 32m

$179

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 4/9

5:30 am-4:39 pm

1 stop11h 09m

Washington, D.C. Dulles Intl

Fri 4/10

5:44 pm-1:26 am

1 stop7h 42m

$180

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 4/13

12:42 pm-12:36 am

1 stop11h 54m

Washington, D.C. Dulles Intl

Mon 4/20

6:19 pm-1:31 am

1 stop7h 12m

$181

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 4/30

6:00 am-6:42 pm

1 stop12h 42m

Washington, D.C. Dulles Intl

Mon 5/4

7:43 pm-7:49 am

1 stop12h 06m

$182

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 5/1

5:45 am-7:24 am

Nonstop1h 39m

Washington, D.C. Dulles Intl

Sun 5/3

10:15 pm-11:59 pm

Nonstop1h 44m

$183

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sat 4/25

2:37 pm-4:23 pm

Nonstop1h 46m

Washington, D.C. Dulles Intl

Tue 4/28

8:23 am-1:29 pm

1 stop5h 06m

$184

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Boston to Washington, D.C. Dulles Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Boston and Washington, D.C. Dulles Intl Airport?

What is the cheapest month to fly to Washington, D.C. Dulles Intl Airport?

In general, December is the cheapest month to fly from Boston to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $247. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of December, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $252.

What is the cheapest day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Our data shows that Friday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $412. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Boston to Washington, D.C. Dulles Intl Airport for around $682.

What is the cheapest time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

Flying to Washington, D.C. Dulles Intl Airport from Boston in the morning is the least expensive time of day to depart. momondo users have found prices as low as $497 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $639 on average. Flights to Washington, D.C. Dulles Intl Airport from Boston at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Boston Logan Intl to Washington, D.C. Dulles Intl flight route?

Fly from Boston Logan Intl to Washington, D.C. Dulles Intl for the best Boston Logan Intl - Washington, D.C. Dulles Intl flight prices

How far in advance should I book a flight to Washington, D.C. Dulles Intl Airport?

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Boston when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $290 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Boston for as low as $189 on momondo.

What cabin class options are available on Boston Logan Intl to Washington, D.C. Dulles Intl flights?

There are 4 cabin classes available to choose from on Boston Logan Intl to Washington, D.C. Dulles Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Boston to Washington, D.C. Dulles Intl Airport flights?

You could potentially save up to 12% on your flight if you consider stops on a Boston to Washington, D.C. Dulles Intl Airport flight.

How have Boston to Washington, D.C. Dulles Intl Airport flight prices changed over time?

As of March 2026, prices for Boston to Washington, D.C. Dulles Intl Airport flights are approximately 3% cheaper when compared to flights at the same time last year.

When to book flights from Boston to Washington, D.C. Dulles Intl Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Washington, D.C. Dulles Intl Airport (BOS to IAD) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Washington, D.C. Dulles Intl Airport

Best Price Found

$184

Fastest flight time

1h 34m

Direct flights

Every day
The best one-way flight to Washington, D.C. Dulles Intl Airport from Boston in the past 72 hours is $184. The best round-trip flight deal from Boston to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $312.
The fastest flight from Boston to Washington, D.C. Dulles Intl Airport takes 1h 34m
Direct flights go from Boston to Washington, D.C. Dulles Intl Airport every day.
Search flight deals

  • How far is Boston Logan Intl to Washington, D.C. Dulles Intl by plane?

    There are 409.1 mi between Boston Logan Intl and Washington, D.C. Dulles Intl. Flights usually cover this in 1h 34m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Washington, D.C. Dulles Intl Airport?

    Prices for flights from Boston Logan Intl Airport to Washington, D.C. Dulles Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Washington, D.C. Dulles Intl Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Washington, D.C. Dulles Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Boston Logan Intl Airport to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The required travel and health documents for your Washington, D.C. Dulles Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Dulles Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Boston to Washington, D.C. Dulles Intl Airport?

  • What is the most popular airline from Boston to Washington, D.C. Dulles Intl Airport?

Best airlines flying from Boston to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Boston to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $70Free CancellationRating
6.3
8,564 reviews
Search Spirit Airlines flights
DeltaPriceFrom $80Free CancellationRating
7.9
8,365 reviews
Search Delta flights
JetBluePriceFrom $131Free CancellationRating
7.2
2,906 reviews
Search JetBlue flights
United AirlinesPriceFrom $162Free CancellationRating
7.4
9,525 reviews
Search United Airlines flights

  • United Airlines Flights From Boston to Washington, D.C. Dulles Intl Airport

    United Airlines operates around 15 flights from Boston to Washington, D.C. Dulles Intl Airport every week. The average price of these flights found in the last 72 hours has been $291, but momondo users have found United Airlines deals from Boston to Washington, D.C. Dulles Intl Airport from as low as $162 round-trip. United Airlines has been scored 7.4/10 in 9,525 reviews.

Traveling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
National Harbor
Gettysburg
Arlington
Winchester
Waldorf
Woodbridge
Laurel
Colonial Beach
Gaithersburg
Towson
Silver Spring
Fredericksburg
Rockville
Tysons
Manassas
Sterling
Linthicum Heights
Springfield
Bethesda

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Boston to Washington, D.C.. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Boston to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Boston to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from Boston to Washington, D.C.?

Once all potential Boston to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Boston to Washington, D.C. right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Boston to Washington, D.C. flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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