Pegasus Airlines had added Muscat and Dammam to its long-haul network from Stansted.
The Turkish carrier will launch three times weekly flights to the Omani capital on July 3.
This will increase to four times weekly from July 15.
Stansted-Muscat services, via Istanbul, will operate on Tuesdays, Thursdays and Saturdays, returning Wednesdays, Fridays and Sundays.
Prices start from £115.99.
Meanwhile, Pegasus has rolled out daily flights to Saudi Arabia’s third largest city Dammam, via Istanbul, with fares starting from £159.99.
The additions takes Pegasus’s network to 110 destinations in 43 countries.