In my opinion, the only place you'll go with a History degree is either a general role in the forces, or pilot. In both these cases, the degree is really only a demonstration of ability, for which reason a non-relevant degree like history is potentially as good as any other.
But for most other specialist jobs (Engineer, programme manager, planner) a specialist - or at-least heavily numerate degree will stand you in much better stead. This basically means...
(1) Engineering
(2) Maths / Physics (of limited use to become an Engineer but useful for most other roles)
(3) Transport or Business management.
(4) Travel and tourism.
(3) and (4) are clearly fairly specialised and will help get into particular roles within the industry - (1) is also specialised but opens up a lot of more general roles; (2) opens up many roles but probably not Engineering itself unless you do additional training - either licenses for the ground-engineering role, or an MSc for the more design / analysis Engineering roles. (Nobody goes straight into Engineering management, whether they've a degree or not.)
There are clearly a lot of very able pilots with humanities degrees - but the fact is until they've gained a lot of industry experience over many years, if they fail as pilot they have few options without substantial retraining. My advice would be that if you really only want to be a pilot the degree won't make any difference, do it if you love the subject, if you don't - why waste 3 years? If you want to work in the industry generally, are passionate about aeroplanes and want to work in them in some / any role - change course, maybe even do an Engineering foundation course if you haven't Maths and Physics A-Levels. It won't prevent you becoming a pilot, but will open up lots of other options too that a History degree, quite frankly, won't.
G