The prices are normally cheaper by picking Egypt as the country as you enter the website. You dont have to be a resident to get these prices on their website. We have done this loads of times and had no problems. Just print off E Ticket and hand at check in. If you pay by cc make sure that the person whose cc it is, is in the travelling party and takes the cc with them as per terms and conditions of the website. However we have never been asked to see the cc on check in.
The fare is normally cheaper if you depart after 9am from Hurgh eg 5th June depart 9.35 Hurgh and depart Cairo 20.30 is £30.62 return ( £33 if depart 23.30pm ) but if you depart at 07.50am the price is £60.24 which is nearly double!!
Pick UK as the country as you enter the site and the same flight is £77.70!!
See
EgyptAir