Cheap flights from Washington Dulles to London Heathrow
Washington Dulles to London Heathrow (IAD → LHR). We are tracking 5 fares on this route.
Cheapest tracked fare $268 · typical price $502 · you save about $234 (47%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Icelandair
2026-09-06
1 stop
$268
Icelandair
2026-10-02
1 stop
$270
Icelandair
2026-10-21
1 stop
$292
Icelandair
2026-09-28
1 stop
$302
ITA Airways
2026-11-29
1 stop
$322
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 Washington Dulles to London Heathrow get?
The cheapest fare we have tracked on this route is $268, compared with a typical $502 for a trip of this distance.
Is it cheaper to fly to London Heathrow 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 Washington Dulles to London Heathrow 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.