Airbus A340-300 has 295 seats Airbus A340-500 has 313 seats Airbus A340-600 has 380 seats
Well... It depends how many seats the manufacturer decided to install.
650 passengers
It depends on the model of the plane, and the configuration of seats. Singapore Airlines operates Boeing 777, Airbus A380, Airbus A340, and Airbus A330 aircraft.
Airbus A380 has passenger capacity of 550 and maximum can be 850 passengers.
The Airbus A321 has a maximum certified seating capacity of 220 seats. However it is usually configured for 185 seats in a 2 class layout and 199 seats in a single class layout.
The A 380 has over 3 times the number of seats. It is also over 8 times the total weight of a 320
The Airbus A319 has a maximum certified seating capacity of 156 seats. However it is usually configured for 124 seats in a 2 class layout and 134 seats in a single class layout.
In standard 3-class configuration (economy, business, first), the Airbus A380 seats 525 passengers. In all-economy configuration, it can seat 853.
The Airbus A321 has a maximum certified seating capacity of 220 seats. However it is usually configured for 185 seats in a 2 class layout and 199 seats in a single class layout.
The A330 can carry up to 335 passengers
The plane cary 555 passengers and crew.