The trip starts like always bargaining for a taxi from the airport.
In general prices relate to bus prices.
If the last bus is gone or there is not bus stop near prices are considerable
The bus goes 10km west from the airport to Dahab and costs 15 LE (1 EUR = 3.75 LE).
Taxi cost 10 to 15 LE for the 110 km to Dahab, but you have to wait until all 8 seats are occupied or pay for the missing seats.