No, that could not be divided by half, because when you do the calculations, if you look at StatsCan data, without taxes, an average ticket ranges between $200 and $300, depending which quarter you look at. You also add taxes to that, so the estimates for a one-way ticket, on average, would be about $500 or less. A round-trip ticket would be $1,000 or less.
Then you divide $3.87 billion by $1,000, and that's how you get 3,870,000 passengers.
More data is in the airlines' hands, and you certainly have the power to subpoena that data in this committee.