The cheapest Paris to Boston return flight on the radar right now is €494, flying with Icelandair via one or more connections. It covers departures in November 2026, and every dated link below opens that exact CDG–BOS search on Skyscanner. The price we usually record on this route is €521. Across 113 recorded checks it has ranged between €215 and €739. Our sampling points to November 2026 as the cheapest month to fly Paris 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 Paris? 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; Paris to Boston is usually still decent value around the same window.