St. Louis will get a direct link to Reykjavik from May 14, 2027, when Icelandair starts seasonal service between Keflavik International (KEF) and St. Louis Lambert International (STL). Flights run three to four times weekly — Mondays, Wednesdays, Fridays and Sundays — until October 24, 2027, on a Boeing 737 MAX 8 fitted with 16 business-class recliners and 144 economy seats.
The route makes St. Louis Icelandair's 16th US gateway and its first new American destination announced for 2027. It's also a strategic pick: Southwest Airlines, Icelandair's growing partner, is the busiest carrier at Lambert, so the connection opens up one-stop itineraries between points across the US and Europe via Iceland. Icelandair's chief commercial officer, Tómas Ingason, framed the city as a natural fit given that partnership.
St. Louis has been quietly rebuilding its long-haul credentials. British Airways and Lufthansa both launched routes to the city in the years after the pandemic, making Icelandair the third European carrier at STL. There's history here, too: the defunct budget airline WOW Air briefly flew St. Louis–Reykjavik in 2018 and 2019 before collapsing. Icelandair, a far more established operator, is arriving with much bigger US capacity overall — Cirium schedule data shows the airline is flying 15% more seats to the US this year than in 2019.
For travellers, the sweetener is Icelandair's stopover program: you can tack on up to seven days in Iceland at no extra airfare, turning a connection into a two-country trip. Add Southwest's domestic network on the other end, and the route works both for Missourians eyeing Europe and for Europeans wanting an easy on-ramp to the American Midwest.
Expect fares and award availability details to firm up closer to the May 2027 launch, but the shape of the route — seasonal, summer-heavy, with a free stopover built in — makes it one to watch if you're in the Midwest and tired of connecting through the coasts.
