Chairman Martin Broughton said BA was in discussions with its institutional investors about exploring opportunities in the convertible market, which it said was the best way to increase cash reserves.
A weekend news report suggested the airline had received support from some of its shareholders for a major rights issue, a move seen by analysts as an absolute last resort.
Broughton told the airline's AGM it was clear that deficits in the group's pension schemes would be higher than the 1.74 billion pounds indicated last September.
The valuation of its funds was likely to be down by at least 1.2 billion pounds ($1.95 billion), he said.
The company could not afford to increase its own contribution -- which totaled more than 1.8 billion pounds in the last three years, he added.
It is a sobering thought that this level of contribution is far in excess of our cumulative profits, which have been 1 billion pounds, over the same period, he said.
The company will agree a revised funding plan with pension trustees after a review, he said.
Shares in the group, which have fallen by almost 30 percent this year, were up 0.3 percent at 127 pence at 1034 GMT. The
FTSE blue-chip index <.FTSE> was up 0.64 percent.
(Reporting by Paul Sandle and Victoria Bryan, Editing by Rosalba O'Brien)