I just booked a seat in upper for a trip from LHR to BOS on Sunday October 3. While booking all indications were that we would be flying on a 747-400 however, when it came time to select seats, the map was for an A340-300. Does anyone know how I can figure out what type of aircraft I will be on? Thanks.
If your seat plan is showing an A340-300, then its scheduled to be that aircraft. Unless of a technical fault / increased load demand / some other VS reason it is usually pretty unlikely that it will change!
So looking like an A340-300 for you! According to the Which Aircraft? tool...
Aircraft %
Airbus A340-300 70%
Airbus A340-600 29%