Denver DEN Iceland Icelandair London London Gatwick LGW Reykjavik Iceland KEF Seattle SEA Airport

Norwegian $200 one way Denver and Seattle to London LGW, Icelandair $471 round trip

Norwegian launches nonstop flights from Denver and Seattle to London Gatwick LGW in mid-September. One-way ticket prices start at $200 on both routes with widespread availability for flights September to March 2018, excluding late December holiday season weeks.

Norwegian Air round trip prices start from $432 Seattle and $447 Denver.

Icelandair also services Seattle and Denver and offers similar round trip prices in the mid-$400s for some dates with the advantage of free checked bags and potential for an Iceland stopover.

Norwegian Airlines  Seattle SEA – London Gatwick LGW – Seattle SEA

$432 round trip (purchase separate one-way tickets for lowest price).

Monday Sep 25 – Wednesday Oct 4, 2017

SEA-LGW $432 DY Sep25-Oct4

Norwegian Airlines Denver DEN – London LGW

$199.90 one way  Saturday Sep 16

DEN-LGW $200ow DY Sep16

Add $90 one way for LowFare+ including checked bag, self-select seat assignment and inflight meals.

An even better round trip ticket price is available with Icelandair, if you need checked luggage and want a self-selected seat.

Icelandair with Iceland 3 night stopover

SEA-LGW $471 FI Nov4-15

$470.99 round trip 

Sat Nov 4 Seattle to London LGW

Sun Nov 12 London LGW to Iceland

Wed Nov 15 Keflavik, Iceland KEF – Seattle SEA
SEA-LGW $471 FI Nov4-15