A JetBlue flight from Paris to New York had to divert to Boston without a clear explanation, while a United flight heading to Newark diverted for additional fuel due to weight and balance restrictions. Both incidents highlight the importance of flight planning in aviation. Expert opinion in the transportation field suggests that diversions for fuel are often a necessary safety measure, especially on longer routes where weight calculations can change based on factors like fuel load and weather conditions. Such precautions ensure the safety of passengers and crew, emphasizing the critical nature of effective logistical planning in air travel.