Icelandair has unprecedented low fares for San Francisco to London LHR starting at $263 round trip. These ticket prices are available through Priceline. The same itinerary on Orbitz prices as $343 and I was unable to pull up $263 Momondo ticket prices. The catch is this an economy light low fare with carry-on only free bag allowance. Also, the lowest fares force an overnight in Iceland on the return flights. Add $100 to the round trip ticket price if you need a checked bag.
Icelandair website has $335 round trip tickets without an overnight layover in Iceland.
This sale made me a buyer today since I can get a round trip ticket from London to Sibiu, Romania for $120. I missed out on the spring trip to Romania I had planned, so this is my next opportunity for Romania.
Update 5-20 9:40am Pacific: Priceline sent my Icelandair record locator number. I logged into Icelandair and selected seat assignments for all four flights free of charge and entered my frequent flyer number and passport information. All good to go for a $270 round trip to London and Iceland in the fall.
Icelandair San Francisco SFO – Keflavik KEF – London Gatwick LHR – KEF (25 hr. overnight layover) – SFO
Icelandair San Francisco SFO – Keflavik KEF – London Gatwick LHR – KEF (no overnight layover) – SFO
Icelandair website ticket $335.37 round trip Mon Nov 19 – Wed Nov 28
$435.37 for Economy Standard with one checked bag included.