The cheapest Glasgow to Boston return flight on the radar right now is £339, flying with Aer Lingus via one or more connections. It covers departures in November 2026, and every dated link below opens that exact GLA–BOS search on Skyscanner. At 30% under the £484 we normally record here, it is one of the strongest GLA–BOS fares in our index. Across 46 recorded checks it has ranged between £194 and £578. Our sampling points to November 2026 as the cheapest month to fly Glasgow to Boston.
We do not post a price and leave it to age. Each fare is re-checked against Skyscanner on a schedule and carries the time it was last confirmed. Not flying from Glasgow? We track 53 other departure cities for Boston, listed at the foot of this page.
Cheap fares do not hang around. If this one has already gone, nudge the dates either way by a day or two; Glasgow to Boston is usually still decent value around the same window.