Airlines rarely give one group the whole aircraft on a scheduled flight. On a busy route the group desk may release 20–40 seats on a given flight; on quieter flights, more. For large groups the answer is usually two or three flights.
Split by logic, not alphabet
Splitting by surname looks tidy on paper and causes trouble on the day. Better ways to split: by department, by team, by family, or by who needs to arrive first (organisers and VIPs on the earlier flight).
Keep flights close together
Two flights an hour apart are easier to manage than one early and one late. Ground transfers, hotel check-in and the first session all depend on it.
One coordinator per flight
Give each flight its own coordinator with a printed name list and the booking reference. If one flight is delayed, that person handles it while the other group carries on.
Mixed airlines
Sometimes the best fit is IndiGo for one block and Air India for the other. That is fine — just remember baggage rules differ, so send each sub-group its own instructions.
Quick answers
Can we charter a full aircraft instead?
For very large groups on a single date, a charter can make sense. It is priced very differently from scheduled group fares; ask us for both options.