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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 1/14. 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

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Multiple Airlines Logo
7:00 am - 7:40 am
BOS
-
IAD
24h 40m1 stop
Multiple Airlines Logo
6:00 am - 1:13 am
IAD
-
BOS
19h 13m1 stop
$143Multiple Airlines
Sun, Jan 11 - Wed, Jan 14
Frontier Logo
6:00 am - 11:43 am
BOS
-
IAD
29h 43m1 stop
Frontier Logo
10:08 pm - 1:03 am
IAD
-
BOS
26h 55m1 stop
$144Frontier
Mon, Jan 12 - Mon, Jan 19
Multiple Airlines Logo
11:06 am - 7:55 am
BOS
-
IAD
20h 49m1 stop
Multiple Airlines Logo
1:46 pm - 4:19 pm
IAD
-
BOS
26h 33m1 stop
$145Multiple Airlines
Thu, Jan 8 - Sun, Jan 11
Multiple Airlines Logo
5:23 pm - 11:43 am
BOS
-
IAD
18h 20m2 stops
Multiple Airlines Logo
11:00 am - 1:03 am
IAD
-
BOS
14h 03m1 stop
$146Multiple Airlines
Tue, Jan 13 - Tue, Jan 20
United Airlines Logo
9:30 am - 11:16 am
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
10:12 pm - 11:49 pm
IAD
-
BOS
1h 37mnonstop
$147United Airlines
Wed, Jan 14 - Wed, Jan 14
Frontier Logo
11:41 am - 11:43 am
BOS
-
IAD
24h 02m2 stops
Frontier Logo
10:08 pm - 1:13 am
IAD
-
BOS
27h 05m1 stop
$152Frontier
Mon, Jan 12 - Fri, Jan 16
Multiple Airlines Logo
6:00 am - 4:50 pm
BOS
-
IAD
10h 50m1 stop
Multiple Airlines Logo
1:46 pm - 4:19 pm
IAD
-
BOS
26h 33m1 stop
$153Multiple Airlines
Wed, Jan 7 - Sun, Jan 11
Multiple Airlines Logo
6:00 am - 3:27 pm
BOS
-
IAD
9h 27m1 stop
Multiple Airlines Logo
11:00 am - 11:57 pm
IAD
-
BOS
12h 57m2 stops
$155Multiple Airlines
Mon, Jan 12 - Tue, Jan 20
Multiple Airlines Logo
2:00 pm - 8:38 am
BOS
-
IAD
18h 38m2 stops
Multiple Airlines Logo
10:08 pm - 1:03 am
IAD
-
BOS
26h 55m1 stop
$156Multiple Airlines
Fri, Jan 16 - Mon, Jan 19
United Airlines Logo
9:30 am - 11:16 am
BOS
-
IAD
1h 46mnonstop
United Airlines Logo
12:40 pm - 2:17 pm
IAD
-
BOS
1h 37mnonstop
$157United Airlines
Wed, Jan 14 - Wed, Jan 21

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
Jan 12
BOS6:00 amBoston Logan Intl
29h 43m
1 stop
IAD11:43 amWashington, D.C. Dulles Intl
Jan 19
IAD10:08 pmWashington, D.C. Dulles Intl
26h 55m
1 stop
BOS1:03 amBoston Logan Intl
$144
Find similar
Frontier
Jan 12
BOS11:41 amBoston Logan Intl
24h 02m
2 stops
IAD11:43 amWashington, D.C. Dulles Intl
Jan 16
IAD10:08 pmWashington, D.C. Dulles Intl
27h 05m
1 stop
BOS1:13 amBoston Logan Intl
$152
Find similar
Frontier
Jan 29
BOS6:00 amBoston Logan Intl
10h 28m
1 stop
IAD4:28 pmWashington, D.C. Dulles Intl
Feb 5
IAD5:37 pmWashington, D.C. Dulles Intl
7h 36m
1 stop
BOS1:13 amBoston Logan Intl
$163
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
Jan 14
BOS9:30 amBoston Logan Intl
1h 46m
IAD11:16 amWashington, D.C. Dulles Intl
Jan 14
IAD10:12 pmWashington, D.C. Dulles Intl
1h 37m
BOS11:49 pmBoston Logan Intl
$147
Find similar
United Airlines
Jan 14
BOS9:30 amBoston Logan Intl
1h 46m
IAD11:16 amWashington, D.C. Dulles Intl
Jan 21
IAD12:40 pmWashington, D.C. Dulles Intl
1h 37m
BOS2:17 pmBoston Logan Intl
$157
Find similar
United Airlines
Jan 10
BOS2:27 pmBoston Logan Intl
1h 46m
IAD4:13 pmWashington, D.C. Dulles Intl
Jan 11
IAD12:40 pmWashington, D.C. Dulles Intl
1h 37m
BOS2:17 pmBoston Logan Intl
$162
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 December 16, 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

Sun 1/11

7:00 am-7:40 am

1 stop24h 40m

Washington, D.C. Dulles Intl

Wed 1/14

6:00 am-1:13 am

1 stop19h 13m

$143

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 1/12

6:00 am-11:43 am

1 stop29h 43m

Washington, D.C. Dulles Intl

Mon 1/19

10:08 pm-1:03 am

1 stop26h 55m

$144

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Thu 1/8

11:06 am-7:55 am

1 stop20h 49m

Washington, D.C. Dulles Intl

Sun 1/11

1:46 pm-4:19 pm

1 stop26h 33m

$145

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Tue 1/13

5:23 pm-11:43 am

2 stops18h 20m

Washington, D.C. Dulles Intl

Tue 1/20

11:00 am-1:03 am

1 stop14h 03m

$146

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 1/14

9:30 am-11:16 am

Nonstop1h 46m

Washington, D.C. Dulles Intl

Wed 1/14

10:12 pm-11:49 pm

Nonstop1h 37m

$147

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 1/12

11:41 am-11:43 am

2 stops24h 02m

Washington, D.C. Dulles Intl

Fri 1/16

10:08 pm-1:13 am

1 stop27h 05m

$152

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 1/7

6:00 am-4:50 pm

1 stop10h 50m

Washington, D.C. Dulles Intl

Sun 1/11

1:46 pm-4:19 pm

1 stop26h 33m

$153

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Mon 1/12

6:00 am-3:27 pm

1 stop9h 27m

Washington, D.C. Dulles Intl

Tue 1/20

11:00 am-11:57 pm

2 stops12h 57m

$155

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Fri 1/16

2:00 pm-8:38 am

2 stops18h 38m

Washington, D.C. Dulles Intl

Mon 1/19

10:08 pm-1:03 am

1 stop26h 55m

$156

BostonWashington, D.C.

BOS - IAD

BOSIAD

Boston Logan Intl

Wed 1/14

9:30 am-11:16 am

Nonstop1h 46m

Washington, D.C. Dulles Intl

Wed 1/21

12:40 pm-2:17 pm

Nonstop1h 37m

$157

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 $212. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $244.

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 $448. 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 $754.

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 $558 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 $664 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 $278 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.

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

As of December 2025, prices for Boston to Washington, D.C. Dulles Intl Airport flights are approximately 17% 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

$161

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 $161. The best round-trip flight deal from Boston to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is $290.
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 $51Free CancellationRating
6.3
8,186 reviews
Search Spirit Airlines flights
DeltaPriceFrom $84Free CancellationRating
7.9
8,008 reviews
Search Delta flights
JetBluePriceFrom $103Free CancellationRating
7.2
2,895 reviews
Search JetBlue flights
United AirlinesPriceFrom $155Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights

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

    United Airlines operates around 8 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 $277, but momondo users have found United Airlines deals from Boston to Washington, D.C. Dulles Intl Airport from as low as $155 round-trip. United Airlines has been scored 7.4/10 in 9,092 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
Woodbridge
Waldorf
Tysons
Laurel
Colonial Beach
Silver Spring
Fredericksburg
Towson
Harpers Ferry
Rockville
Gaithersburg
Reston
Manassas
Sterling
Fairfax

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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