Boston to Washington Dulles (BOS → IAD). We are tracking 11 fares on this route.
Cheapest tracked fare $56 · typical price $97 · you save about $41 (42%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
United Airlines
2026-11-15
Direct
$56
—
2026-10-21
Direct
$59
—
2027-01-06
Direct
$59
—
2027-02-03
Direct
$59
—
2027-03-01
Direct
$59
—
2026-11-11
1 stop
$65
United Airlines
2026-11-14
Direct
$72
United Airlines
2026-11-12
Direct
$86
United Airlines
2026-12-16
Direct
$86
United Airlines
2026-11-02
Direct
$87
United Airlines
2026-12-13
Direct
$87
Could you save more?
The airport you were going to fly from is often not the cheapest one. Compare every airport in a region against each other, or check whether a multi-day stopover beats the direct fare.
How cheap can flights from Boston to Washington Dulles get?
The cheapest fare we have tracked on this route is $56, compared with a typical $97 for a trip of this distance.
Is it cheaper to fly to Washington Dulles from a different airport?
Often, yes. Fares out of secondary airports are frequently cheaper than the obvious hub, but they are the ones most likely to be missing from a normal search. Our reverse search compares every airport in a region against each other so the cheaper departure point is not hidden.
Could a stopover make Boston to Washington Dulles cheaper?
Sometimes. On thin long-haul routes a two-leg trip with a multi-day stopover can beat the direct fare, and occasionally a direct fare is not sold at all. Our detour search prices those routings against the direct flight.