Earlier this morning, Icelandair announced they’ll add service from Keflavik International to Denver four times a week starting May 11, 2012. Icelandair will use Boeing 757’s and flight time between the two airports is estimated to be just over six hours. Icelandair also serves Seattle, Boston, New York, Minneapolis, Washington DC and Orlando in the US. Denver is the 5th largest airport in the US and 10th largest airport in the world. Denver has two other international flights to Europe, Frankfurt served by Lufthansa and London, served by British Airways. Denver has also been working for years to secure a Denver – Tokyo route, however, no significant progress has been made.