The cheapest Warsaw to Boston return flight on the radar right now is €430, flying with LOT + jetBlue via one or more connections. It covers departures in November 2026, and every dated link below opens that exact WAW–BOS search on Skyscanner. At 33% under the €641 we normally record here, it is one of the strongest WAW–BOS fares in our index. Across 41 recorded checks it has ranged between €326 and €1,312. Our sampling points to November 2026 as the cheapest month to fly Warsaw 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 Warsaw? We track 51 other departure cities for Boston, listed at the foot of this page.
Fares move quickly. If this Warsaw 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.