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Cheap flights from Boston to Washington, D.C. from $74

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 2/2. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Boston to Washington, D.C.

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:45 am - 7:20 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
1h 35mnonstop
United Airlines Logo
6:15 am - 9:48 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
3h 33m1 stop Newark
$144United Airlines
Fri, Sep 4 - Mon, Sep 7
United Airlines Logo
5:45 am - 7:20 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
1h 35mnonstop
United Airlines Logo
6:15 am - 9:48 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
3h 33m1 stop Newark
$144United Airlines
Sat, Sep 12 - Wed, Sep 16
United Airlines Logo
6:00 am - 11:26 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
5h 26m1 stop Newark
United Airlines Logo
10:15 pm - 11:59 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
1h 44mnonstop
$144United Airlines
Sat, Sep 5 - Sun, Sep 6
Frontier Logo
9:15 am - 7:09 pmBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
9h 54m1 stop Orlando
Frontier Logo
8:00 pm - 8:20 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
12h 20m1 stop Orlando
$148Frontier
Thu, Oct 15 - Thu, Oct 22
Frontier Logo
12:54 pm - 12:10 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
11h 16m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
11:12 am - 10:51 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
23h 39m1 stop Orlando
$148Frontier
Sat, Oct 3 - Sun, Oct 4
Frontier Logo
12:35 pm - 12:28 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
11h 53m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
8:04 pm - 9:16 amIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
13h 12m1 stop Orlando
$148Frontier
Wed, Nov 4 - Sat, Nov 7
JetBlue Logo
5:40 am - 10:21 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
4h 41m1 stop Detroit Metropolitan Wayne County
JetBlue Logo
6:26 pm - 11:10 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
4h 44m1 stop New York John F Kennedy Intl
$232JetBlue
Fri, Sep 25 - Mon, Sep 28
Delta Logo
5:30 am - 10:22 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
4h 52m1 stop Detroit Metropolitan Wayne County
Delta Logo
5:16 pm - 11:56 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
6h 40m1 stop Detroit Metropolitan Wayne County
$247Delta
Thu, Nov 12 - Mon, Nov 16
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
5:13 pm - 11:59 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
6h 46m1 stop Detroit Metropolitan Wayne County
$247Delta
Sun, Oct 25 - Tue, Oct 27
JetBlue Logo
5:40 am - 10:21 amBOS  Boston Logan Intl-IAD Washington, D.C. Dulles Intl
4h 41m1 stop Detroit Metropolitan Wayne County
JetBlue Logo
6:26 pm - 11:10 pmIAD  Washington, D.C. Dulles Intl-BOS Boston Logan Intl
4h 44m1 stop New York John F Kennedy Intl
$255JetBlue
Fri, Sep 25 - Mon, Sep 28

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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 5
BOS5:45 amBoston Logan Intl
1h 35m
IAD7:20 amWashington, D.C. Dulles Intl
Sep 7
IAD6:15 amWashington, D.C. Dulles Intl
3h 33m
1 stop
BOS9:48 amBoston Logan Intl
$144
United Airlines
Sep 12
BOS9:30 amBoston Logan Intl
1h 41m
IAD11:11 amWashington, D.C. Dulles Intl
Sep 15
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
BOS11:59 pmBoston Logan Intl
$147
United Airlines
Sep 3
BOS9:30 amBoston Logan Intl
1h 41m
IAD11:11 amWashington, D.C. Dulles Intl
Sep 5
IAD10:15 pmWashington, D.C. Dulles Intl
1h 44m
BOS11:59 pmBoston Logan Intl
$149

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
Oct 14
BOS11:05 amBoston Logan Intl
8h 04m
1 stop
IAD7:09 pmWashington, D.C. Dulles Intl
Oct 17
IAD8:00 pmWashington, D.C. Dulles Intl
12h 20m
1 stop
BOS8:20 amBoston Logan Intl
$148
Frontier
Oct 21
BOS11:05 amBoston Logan Intl
8h 04m
1 stop
IAD7:09 pmWashington, D.C. Dulles Intl
Oct 22
IAD8:00 pmWashington, D.C. Dulles Intl
12h 20m
1 stop
BOS8:20 amBoston Logan Intl
$158
Frontier
Sep 15
BOS12:52 pmBoston Logan Intl
11h 18m
1 stop
IAD12:10 amWashington, D.C. Dulles Intl
Sep 16
IAD11:12 amWashington, D.C. Dulles Intl
23h 10m
1 stop
BOS10:22 amBoston Logan Intl
$160

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 15, 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
Quickest round-trip

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Fri 9/4

5:45 am-7:20 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Mon 9/7

6:15 am-9:48 am

1 stop3h 33m

$144

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Sat 9/12

5:45 am-7:20 am

Nonstop1h 35m

Washington, D.C. Dulles Intl

Wed 9/16

6:15 am-9:48 am

1 stop3h 33m

$144

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Sat 9/5

6:00 am-11:26 am

1 stop5h 26m

Washington, D.C. Dulles Intl

Sun 9/6

10:15 pm-11:59 pm

Nonstop1h 44m

$144

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Thu 10/15

9:15 am-7:09 pm

1 stop9h 54m

Washington, D.C. Dulles Intl

Thu 10/22

8:00 pm-8:20 am

1 stop12h 20m

$148

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Sat 10/3

12:54 pm-12:10 am

1 stop11h 16m

Washington, D.C. Dulles Intl

Sun 10/4

11:12 am-10:51 am

1 stop23h 39m

$148

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Wed 11/4

12:35 pm-12:28 am

1 stop11h 53m

Washington, D.C. Dulles Intl

Sat 11/7

8:04 pm-9:16 am

1 stop13h 12m

$148

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Fri 9/25

5:40 am-10:21 am

1 stop4h 41m

Washington, D.C. Dulles Intl

Mon 9/28

6:26 pm-11:10 pm

1 stop4h 44m

$232

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Thu 11/12

5:30 am-10:22 am

1 stop4h 52m

Washington, D.C. Dulles Intl

Mon 11/16

5:16 pm-11:56 pm

1 stop6h 40m

$247

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Sun 10/25

6:00 am-11:50 am

1 stop5h 50m

Washington, D.C. Dulles Intl

Tue 10/27

5:13 pm-11:59 pm

1 stop6h 46m

$247

BostonWashington, D.C.

BOS Boston Logan Intl - IAD Washington, D.C. Dulles Intl

BOSIAD

Boston Logan Intl

Fri 9/25

5:40 am-10:21 am

1 stop4h 41m

Washington, D.C. Dulles Intl

Mon 9/28

6:26 pm-11:10 pm

1 stop4h 44m

$255

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?

Prices are currently low for flights on this route.

Typical prices usually range from $239 to $434.
The lowest price recently found on this route was $144.

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 $248. 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 $390. 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 $648.

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 $447 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 $625 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 from Boston 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 $301 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 $247 on momondo.

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

There are 4 cabin classes available to choose from on Boston to Washington, D.C. Dulles Intl Airport 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?

No. A direct flight is the cheapest option for a flight between Boston to Washington, D.C. Dulles Intl Airport.

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

As of August 2026, prices for Boston to Washington, D.C. Dulles Intl Airport flights are approximately 0% 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 $356.
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

Frequently asked questions about flying from Boston to Washington, D.C. Dulles Intl Airport

  • 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
DeltaPriceFrom $128Free CancellationRating
7.8
8,508 reviews
Search Delta flights
United AirlinesPriceFrom $160Free CancellationRating
7.4
10,110 reviews
Search United Airlines flights
JetBluePriceFrom $171Free CancellationRating
7.1
3,038 reviews
Search JetBlue flights

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

    United Airlines operates around 14 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 $300, but momondo users have found United Airlines deals from Boston to Washington, D.C. Dulles Intl Airport from as low as $160 round-trip. United Airlines has been scored 7.4/10 in 10,110 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
Arlington
Gettysburg
Winchester
Waldorf
Laurel
Woodbridge
Fredericksburg
Gaithersburg
Linthicum Heights
Rockville
Silver Spring
Towson
Sterling
Colonial Beach
Springfield
Fairfax
Tysons
Edgewood

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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