Boise to Washington Dulles (BOI → IAD). We are tracking 5 fares on this route.
Cheapest tracked fare $101 · typical price $259 · you save about $158 (61%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Delta
2026-11-04
1 stop
$101
—
2026-10-22
1 stop
$128
—
2026-10-19
1 stop
$128
Frontier
2026-09-24
1 stop
$128
—
2026-10-26
1 stop
$129
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 Boise to Washington Dulles get?
The cheapest fare we have tracked on this route is $101, compared with a typical $259 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 Boise 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.