Boston to Washington
BOSIAD
Fly from Boston to Washington starting at USD 49 with UA.
Best fare available on Jun 3, 2026.
Limited seats. Better plans. Book before it's gone.
Boston to Washington cheapest flights this week
22 Apr
UA
19:30BOS
--:--IAD
Direct$116VIEW DEAL
24 Apr
UA
09:30BOS
--:--IAD
Direct$118VIEW DEAL
27 Apr
UA
09:30BOS
--:--IAD
Direct$112VIEW DEAL
28 Apr
UA
05:45BOS
--:--IAD
Direct$112VIEW DEAL
29 Apr
UA
09:30BOS
--:--IAD
Direct$111VIEW DEAL
18 May
UA
19:26BOS
--:--IAD
1 Stop$99VIEW DEAL
3 Jun
UA
09:30BOS
--:--IAD
Direct$49VIEW DEAL
Boston to Washington monthly flight fare trend
Apr
from USD 111
May
from USD 99
Jun
from USD 49
Jul
No flights
Aug
No flights
Sep
No flights
Airport Details
Origin
Boston
Logan International Airport (BOS)
Boston, BOS
Zone
New York
Elev
20 ft
Destination
Washington
Washington Dulles International Airport (IAD)
Dulles, IAD
Zone
New York
Elev
312 ft
