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Cheap flights from Boston to Washington, D.C. from $80

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 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

United Airlines Logo
2:40 pm - 4:23 pmBOS-IAD
1h 43mnonstop
United Airlines Logo
10:18 pm - 11:57 pmIAD-BOS
1h 39mnonstop
$157United Airlines
Find Deal
Tue, Sep 9 - Fri, Sep 12
Frontier Logo
10:13 am - 9:19 pmBOS-IAD
11h 06m1 stop
Frontier Logo
8:59 pm - 8:11 amIAD-BOS
11h 12m1 stop
$159Frontier
Find Deal
Sun, Sep 7 - Fri, Sep 12
Frontier Logo
9:18 am - 7:07 pmBOS-IAD
9h 49m1 stop
Frontier Logo
8:36 pm - 8:28 amIAD-BOS
11h 52m1 stop
$160Frontier
Find Deal
Thu, Oct 23 - Sun, Nov 2
United Airlines Logo
9:30 am - 11:13 amBOS-IAD
1h 43mnonstop
United Airlines Logo
5:53 pm - 11:23 pmIAD-BOS
5h 30m1 stop
$167United Airlines
Find Deal
Tue, Sep 9 - Fri, Sep 12
United Airlines Logo
2:40 pm - 4:23 pmBOS-IAD
1h 43mnonstop
United Airlines Logo
5:16 pm - 6:55 pmIAD-BOS
1h 39mnonstop
$168United Airlines
Find Deal
Fri, Sep 5 - Mon, Sep 8
United Airlines Logo
2:36 pm - 4:20 pmBOS-IAD
1h 44mnonstop
United Airlines Logo
10:19 pm - 11:59 pmIAD-BOS
1h 40mnonstop
$169United Airlines
Find Deal
Tue, Sep 30 - Sat, Oct 4
Frontier Logo
9:23 am - 7:51 pmBOS-IAD
10h 28m1 stop
Frontier Logo
8:36 pm - 8:28 amIAD-BOS
11h 52m1 stop
$170Frontier
Find Deal
Fri, Oct 31 - Sun, Nov 2
United Airlines Logo
5:30 am - 7:11 amBOS-IAD
1h 41mnonstop
United Airlines Logo
10:19 pm - 11:59 pmIAD-BOS
1h 40mnonstop
$171United Airlines
Find Deal
Wed, Oct 1 - Sat, Oct 4
Frontier Logo
9:55 am - 4:34 pmBOS-IAD
6h 39m1 stop
Frontier Logo
8:36 pm - 8:28 amIAD-BOS
11h 52m1 stop
$174Frontier
Find Deal
Fri, Nov 14 - Sun, Nov 16
Logo
2:53 pm - 6:19 pmBOS-IAD
27h 26m1 stop
Logo
7:14 pm - 1:48 pmIAD-BOS
18h 34m1 stop
$204
Find Deal
Thu, Sep 11 - Sun, Sep 14

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

Our best American Airlines deals on Boston to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
Sep 2
BOS1:40 pmBoston Logan Intl
5h 12m
1 stop
IAD6:52 pmWashington, D.C. Dulles Intl
Sep 7
IAD9:16 amWashington, D.C. Dulles Intl
6h 39m
1 stop
BOS3:55 pmBoston Logan Intl
$327
Find similar
American Airlines
Sep 2
BOS6:21 pmBoston Logan Intl
4h 41m
1 stop
IAD11:02 pmWashington, D.C. Dulles Intl
Sep 7
IAD9:16 amWashington, D.C. Dulles Intl
6h 39m
1 stop
BOS3:55 pmBoston Logan Intl
$328
Find similar

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
Sep 9
BOS2:40 pmBoston Logan Intl
1h 43m
IAD4:23 pmWashington, D.C. Dulles Intl
Sep 12
IAD10:18 pmWashington, D.C. Dulles Intl
1h 39m
BOS11:57 pmBoston Logan Intl
$157
Find similar
United Airlines
Sep 9
BOS9:30 amBoston Logan Intl
1h 43m
IAD11:13 amWashington, D.C. Dulles Intl
Sep 12
IAD5:53 pmWashington, D.C. Dulles Intl
5h 30m
1 stop
BOS11:23 pmBoston Logan Intl
$167
Find similar
United Airlines
Sep 5
BOS2:40 pmBoston Logan Intl
1h 43m
IAD4:23 pmWashington, D.C. Dulles Intl
Sep 8
IAD5:16 pmWashington, D.C. Dulles Intl
1h 39m
BOS6:55 pmBoston Logan Intl
$168
Find similar

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 August 26, 2025.
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

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 9/9

2:40 pm-4:23 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Fri 9/12

10:18 pm-11:57 pm

Nonstop1h 39m

$157

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Sun 9/7

10:13 am-9:19 pm

1 stop11h 06m

Washington, D.C. Dulles Intl

Fri 9/12

8:59 pm-8:11 am

1 stop11h 12m

$159

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 10/23

9:18 am-7:07 pm

1 stop9h 49m

Washington, D.C. Dulles Intl

Sun 11/2

8:36 pm-8:28 am

1 stop11h 52m

$160

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 9/9

9:30 am-11:13 am

Nonstop1h 43m

Washington, D.C. Dulles Intl

Fri 9/12

5:53 pm-11:23 pm

1 stop5h 30m

$167

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 9/5

2:40 pm-4:23 pm

Nonstop1h 43m

Washington, D.C. Dulles Intl

Mon 9/8

5:16 pm-6:55 pm

Nonstop1h 39m

$168

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 9/30

2:36 pm-4:20 pm

Nonstop1h 44m

Washington, D.C. Dulles Intl

Sat 10/4

10:19 pm-11:59 pm

Nonstop1h 40m

$169

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 10/31

9:23 am-7:51 pm

1 stop10h 28m

Washington, D.C. Dulles Intl

Sun 11/2

8:36 pm-8:28 am

1 stop11h 52m

$170

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 10/1

5:30 am-7:11 am

Nonstop1h 41m

Washington, D.C. Dulles Intl

Sat 10/4

10:19 pm-11:59 pm

Nonstop1h 40m

$171

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 11/14

9:55 am-4:34 pm

1 stop6h 39m

Washington, D.C. Dulles Intl

Sun 11/16

8:36 pm-8:28 am

1 stop11h 52m

$174

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 9/11

2:53 pm-6:19 pm

1 stop27h 26m

Washington, D.C. Dulles Intl

Sun 9/14

7:14 pm-1:48 pm

1 stop18h 34m

$204

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

In general, January 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 $207. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of January, then flying in March is also cheap. Prices for this month can be found on momondo for an average of $251.

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 $445. When flying out on a Tuesday, 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 $756.

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 evening is the least expensive time of day to depart. momondo users have found prices as low as $543 when looking at flights departing in the evening. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $669 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 $281 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 $227 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.

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

As of August 2025, prices for Boston to Washington, D.C. Dulles Intl Airport flights are approximately 48% more expensive 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

$219

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 $219. The best round-trip flight deal from Boston to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $355.
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 40m, 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 $51Free CancellationRating
6.3
8,031 reviews
Search Spirit Airlines flights
JetBluePriceFrom $68Free CancellationRating
7.2
2,918 reviews
Search JetBlue flights
DeltaPriceFrom $84Free CancellationRating
7.9
7,979 reviews
Search Delta flights
United AirlinesPriceFrom $156Free CancellationRating
7.4
8,943 reviews
Search United Airlines flights

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

    United Airlines operates around 30 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 $286, but momondo users have found United Airlines deals from Boston to Washington, D.C. Dulles Intl Airport from as low as $156 round-trip. United Airlines has been scored 7.4/10 in 8,943 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
Gettysburg
Arlington
National Harbor
Winchester
Woodbridge
Waldorf
Tysons
Laurel
Silver Spring
Colonial Beach
Fredericksburg
Harpers Ferry
Towson
Manassas
Rockville
Gaithersburg
Reston
Fairfax
Glen Burnie

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.

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