The cheapest Frankfurt to Boston return flight on the radar right now is €564, flying with Scandinavian Airlines via one or more connections. It covers departures in February 2027, and every dated link below opens that exact FRA–BOS search on Skyscanner. The price we usually record on this route is €466. Across 101 recorded checks it has ranged between €416 and €611. Our sampling points to February 2027 as the cheapest month to fly Frankfurt to Boston.
Every fare here is re-confirmed against Skyscanner automatically, and each one is stamped with the moment it was last checked, so you can see how fresh it is instead of taking it on trust. Not flying from Frankfurt? We track 53 other departure cities for Boston, listed at the foot of this page.
Fares move quickly. If this Frankfurt to Boston price has gone by the time you search, shift the dates a day or two either side, because the same route is often still cheap just next door.