There are two types of Egyptian Visa

Entry Visa is required for any foreigner arriving in Egypt for purposes other than tourism, e.g. work, study, etc. The possession of a valid entry visa is needed to complete the residence procedure in Egypt.
Tourist Visa is usually valid for a period not exceeding three months and granted on either single or multiple entry basis.
Egypt Entry Visa is valid only for travel within three months from the date of issue and is valid only for One- month stay in Egypt, beginning on the date of arrival. If you have a reason to extend your stay, you can do that from the ministry of interior affairs in Egypt after declaring the reasons for that and their acceptance for that reasons.

Egyptian with foreign passports Any Egyptian citizen holds foreign passport will be granted a courtesy visa after declaring proof for Egyptian nationality like Egyptian (passport, personal or family identification card or birth certificate), also the foreign wife to Egyptian husband will be granted a courtesy visa after declaring a proof for their marriage.

Uusful Tip

While you are buying your visa, use the opportunity to exchange your currency, but please note, only $US, UK or Euros can be accepted.
Visitors entering Egypt at the overland border post at Taba, to visit the Gulf of Aqaba coast and St. Catherine’s, can be exempt from requiring a visa and be granted a free residence permit, valid for fourteen days, to visit the area.
Those in possession of a residence permit, in Egypt, are not required to obtain an entry visa if they leave the country and return to it within the validity of their residence permit, or within six months, whichever period is less.

Read below to see if you can get an entry visa at airport or you’re required to get pore arrival visa