Hi!!!
I don't know what opportunities are like in the UK, Europe etc, but in Australia it is very hard to get the job of Flight Attendant, so i would take the job and go travelling later, plus you'd get your staff discount etc and as said you may not get your holidays when you want them, but hey, you've got the job and the discounts sooooo...... it just depends how much you want the job? Then again, i don't know what the opportunites are like over there? Good luck either way
Oz