The line that's been trotted out here several times before is that "a few extra years' seniority with an airline is worth more than hanging around for the pension."
You'll only know it's worth it financially with hindsight.......but even a few years is a h*** of a long time in the airline world - at best the youngsters joining any airline today will always be ahead of you in that hunt for a (perhaps higher paid command), at worse by the time your IPP comes around the airline world could be in lock down again.
Your choice, good luck whatever you decide.
wiggy
(member of the been there, seen it, done it (34/12 point
...then, now
) club)