Domestic flights are stagnant at both Edinburgh & Glasgow.
Domestic CAA Stats
EDI Jul 2016 470456
Jul 2017 476250 1% growth
GLA Jul 2016 382952
Jul 2017 381239 >1% decline
So a 10% increase in Intl pax equates to less total increase when combined totals are added to together. I.e. 50,000 increase of 500000 = 550000 a 10% increase of international pax. So if a domestic total which is stagnant is added say 500,000 for 2016 & 2017. The new 1,050,000 or 5% increase overall in 2017 from 2016.
Domestic is stagnant due to increase rail on West & East Coast Mainline.