Las Vegas to Washington Dulles (LAS → IAD). We are tracking 19 fares on this route.
Cheapest tracked fare $81 · typical price $263 · you save about $182 (69%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Frontier Airlines
2026-09-18
Direct
$81
Frontier Airlines
2026-09-24
Direct
$81
Frontier Airlines
2026-09-25
Direct
$81
Frontier Airlines
2026-10-02
Direct
$83
Frontier Airlines
2026-09-12
Direct
$107
Frontier Airlines
2026-09-10
Direct
$108
—
2026-09-09
Direct
$113
Frontier Airlines
2026-10-24
Direct
$119
Frontier Airlines
2026-10-01
2 stops
$123
United Airlines
2026-10-06
Direct
$124
United Airlines
2026-10-07
Direct
$124
Frontier Airlines
2026-09-22
Direct
$131
Frontier Airlines
2026-09-11
Direct
$143
Frontier Airlines
2026-09-21
1 stop
$150
Frontier Airlines
2026-09-15
Direct
$169
Frontier Airlines
2026-09-16
Direct
$169
Frontier Airlines
2026-09-14
1 stop
$205
Frontier Airlines
2026-09-07
3 stops
$211
United Airlines
2026-09-06
1 stop
$212
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 Las Vegas to Washington Dulles get?
The cheapest fare we have tracked on this route is $81, compared with a typical $263 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 Las Vegas 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.