Book cheap flights fast with idealo

Save time & money: find cheap flights fast

Easy to use: filter & sort to find the best flight

Free to use: compare offers & book flights

Our cheapest offers for flights from United Kingdom a Washington DC

Here you can compare cheap flights from United Kingdom to Washington DC (IAD) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to Washington DC. Prices and availability may change at any time.

Flights from London Heathrow (LHR) to Washington DC (IAD)

	Outbound	Return	Airlines	Baggage	Price
London Heathrow Washington DC	Outbound 03/29/25 1 Stopover (KEF) FI0455, FI0645 26h 35min	Return 04/02/25 1 Stopover (KEF) FI0644, FI0450 10h 25min	Icelandair	?	$605
London Heathrow Washington DC	Outbound 03/29/25 1 Stopover (KEF) FI0455, FI0645 26h 35min	Return 04/02/25 1 Stopover (KEF) FI0644, FI0450 10h 25min	Icelandair		$609
London Heathrow Washington DC	Outbound 03/29/25 1 Stopover (KEF) FI0455, FI0645 26h 35min	Return 04/02/25 1 Stopover (KEF) FI0644, FI0454 18h 50min	Icelandair	?	$619