Question

Jessie's aunt arrives at the airport today her letter said she would.
A. after today
B. after airport
C. no dash or dashes needed

Answer 1

A. after today

Why?
The sentence is too long and won't make sense with no comma, so here is the correct way to say it:

Jessie's aunt arrives at the airport today, her letter said she would.

Answer 2

A after today there is comma