On May 1, Boston regained Boeing 747 passenger flights. This is because of Lufthansa,which last used the Queen of the Skies to the Massachusetts airport in October 2022. While only the 747-400 is scheduled, Flightradar24 shows the 747-8i appeared on May 1 and May 4. Importantly, Lufthansa owns its 747-400s and 747-8i aircraft, and has surely paid them off. As such, they are relatively inexpensive ownership-wise compared to brand-new alternatives, offset by higher fuel burn and maintenance.