Find cheap flights from Boston to Washington Dulles Airport

BOS - IAD

Find cheap flights from Boston to Washington Dulles Airport

Round-trip
Economy
Boston (BOS)
Washington Dulles Intl
Wed 7/15
Wed 7/22
Any month
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Good to know

Low season

January Best time to beat the crowds with an average 14% drop in price.

High season

October Most popular time to fly with an average 9% increase in price.

Average price of a round-trip

$233 (avg. price over the last 2 weeks)

Good deal for a round-trip

$197 or less

When to book flights from Boston to Washington Dulles Intl

Estimated round-trip price
Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for finding a cheap flight

  • Looking for a cheap flight? 25% of our users found flights on this route for $161 or less.
  • The cheapest flight from Boston to Washington Dulles Airport was found 39 days before departure, on average.
  • Book at least 2 weeks before departure in order to get a below-average price.
  • High season is considered to be September, October and November. The cheapest month to fly is January.
  • Morning departure is around 43% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for booking Boston to Washington Dulles Airport flights

Are flight prices cheaper from Boston to Washington Dulles Airport because of Coronavirus (COVID-19)?

How long does a flight from Boston to Washington Dulles Airport take?

How many flights are there between Boston and Washington Dulles Airport?

Which airlines provide the cheapest flights from Boston to Washington Dulles Airport?

Do I need a passport to fly between Boston and Washington Dulles Airport?

Which airlines fly most frequently between Boston and Washington Dulles Airport?

What’s the cheapest day of the week to fly Boston to Washington Dulles Airport?

How does KAYAK’s flight Price Forecast tool help me choose the right time to buy?

Top airline flying Boston Logan Intl to Washington Dulles Intl

Scores according to KAYAK customer reviews

8.0
Delta
Overall score based on 28,460 reviews
8.2
Boarding
7.8
Comfort
8.5
Crew
7.8
Entertainment
7.5
Food
Airline reviews
Read more about Delta

Book cheap flights from Boston to Washington Dulles Airport (round-trip)

Airports
Origin
Boston
$101
only
$101
Destination
Washington
$101
only
$101
Mon, Aug 10
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 25m
Wed, Aug 12
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
1h 37m
Trip: 3 days
Based on null reviews
Mon, Aug 10
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 25m
Wed, Aug 12
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
6h 35m
Trip: 3 days
Based on null reviews
Tue, Aug 4
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 55m
Sun, Aug 9
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
1h 45m
Trip: 6 days
Based on null reviews
Thu, Aug 27
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
3h 35m
Sun, Aug 30
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
5h 07m
Trip: 4 days
Based on null reviews
Fri, Aug 7
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 27m
Fri, Aug 14
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
4h 34m
Trip: 8 days
Based on null reviews
Wed, Nov 4
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
1h 34m
Sat, Nov 7
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
7h 04m
Trip: 4 days
Based on null reviews
Sat, Aug 1
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 39m
Sun, Aug 2
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
1h 40m
Trip: 2 days
Based on null reviews
Thu, Oct 1
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
3h 28m
Wed, Oct 14
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
5h 53m
Trip: 14 days
Based on null reviews
Wed, Sep 16
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
4h 18m
Sat, Sep 19
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
3h 24m
Trip: 4 days
Based on null reviews
Thu, Oct 1
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
3h 28m
Fri, Oct 9
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
6h 51m
Trip: 9 days
Based on null reviews
Sat, Aug 15
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 39m
Sat, Aug 22
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
1h 31m
Trip: 8 days
Based on null reviews
Fri, Oct 16
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 21m
Sun, Oct 18
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
5h 53m
Trip: 3 days
Based on null reviews
Fri, Aug 7
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
3h 40m
Sun, Aug 16
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
4h 34m
Trip: 10 days
Based on null reviews
Fri, Sep 11
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 20m
Sat, Sep 12
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
1h 36m
Trip: 2 days
Based on null reviews
Thu, Jul 16
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 31m
Sat, Jul 18
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
6h 12m
Trip: 3 days
Based on null reviews
Fri, Oct 9
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
1h 34m
Sun, Oct 11
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
5h 53m
Trip: 3 days
Based on null reviews
Sat, Aug 1
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 53m
Sun, Aug 2
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
6h 24m
Trip: 2 days
Based on null reviews
Wed, Sep 16
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
4h 42m
Sat, Sep 19
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
3h 24m
Trip: 4 days
Based on null reviews
Fri, Jul 31
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
8h 22m
Sun, Aug 2
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
1h 40m
Trip: 3 days
Based on null reviews
Sat, Oct 10
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
6h 21m
Tue, Oct 13
IAD
Washington Dulles Airport
BOS
Boston Logan Airport
4h 25m
Trip: 4 days
Based on null reviews
Show more results

Book cheap flights from Boston to Washington Dulles Airport (one-way)

Airports
Origin
Boston
$53
only
$53
Destination
Washington
$53
only
$53
Mon, Aug 3
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
4h 44m
Based on null reviews
Sun, Sep 6
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
6h 29m
Based on null reviews
Thu, Aug 13
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
4h 44m
Based on null reviews
Thu, Jul 9
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
8h 19m
Based on null reviews
Tue, Jun 30
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 54m
Based on null reviews
Thu, Jun 25
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
13h 29m
Based on null reviews
Sat, Jul 11
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 31m
Based on null reviews
Wed, Jun 24
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
9h 14m
Based on null reviews
Tue, Jul 14
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 41m
Based on null reviews
Fri, Jul 17
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 41m
Based on null reviews
Tue, Jun 30
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 14m
Based on null reviews
Thu, Jul 16
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
38h 30m
Based on null reviews
Mon, Jun 29
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 14m
Based on null reviews
Wed, Jul 22
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
30h 55m
Based on null reviews
Tue, Jun 23
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
5h 14m
Based on null reviews
Thu, Jul 16
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
38h 30m
Based on null reviews
Wed, Jul 15
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 41m
Based on null reviews
Wed, Jun 24
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
34h 35m
Based on null reviews
Sat, Jul 11
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 41m
Based on null reviews
Thu, Jul 2
BOS
Boston Logan Airport
IAD
Washington Dulles Airport
7h 41m
Based on null reviews
Show more results
*
Prices are per person and are for e–tickets and include all taxes & fees in USD.

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

We’re not the seller.
At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

We compile tonnes of data for you
Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
please send us an and someone from our team will get back to you promptly.

^
The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.
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