Flybe location picker touches down too far

I'm an admirer of the online usability shown on flybe.com's website (OK, they do have a few slightly sneaky techniques for increasing average order revenues - but you still have to take appreciate the way they do it).

So it came as a little surprise to see the site's location selection 'mega menu' partially disappear beneath the bottom of the page of my browser. This means that around half of the destinations the discount airline fly from (including Glasgow, my own local airport) aren't shown at full screen.

I know that Flybe do fly to and from a large number of destinations around Europe, but surely there must be a more economical way of showing as many locations on the screen at once.