Cheap flights from Washington Dulles to London (All Airports)
Washington Dulles to London (All Airports) (IAD → LON). We are tracking 18 fares on this route.
Cheapest tracked fare $304 · typical price $504 · you save about $200 (40%)
Cheapest fares we're tracking
Airline
Departs
Stops
Price
Icelandair
2026-10-11
1 stop
$304
Icelandair
2026-10-18
1 stop
$304
ITA
2026-11-01
1 stop
$304
ITA
2026-11-08
1 stop
$304
ITA
2026-11-15
1 stop
$304
Icelandair
2026-10-04
1 stop
$320
Icelandair
2026-10-25
1 stop
$320
Icelandair
2026-10-12
1 stop
$320
Icelandair
2026-10-19
1 stop
$320
Icelandair
2026-10-26
1 stop
$320
Icelandair
2026-11-02
1 stop
$320
Icelandair
2026-11-09
1 stop
$320
Icelandair
2026-11-16
1 stop
$320
Icelandair
2026-11-23
1 stop
$320
United
2026-11-30
Direct
$325
ITA
2026-09-27
1 stop
$334
ITA
2026-09-28
1 stop
$334
Icelandair
2026-10-05
1 stop
$337
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 (All Airports) get?
The cheapest fare we have tracked on this route is $304, compared with a typical $504 for a trip of this distance.
Is it cheaper to fly to London (All Airports) 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 (All Airports) 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.