The first robbery happened around 1:30 a.m. on the 7700 block of Ogontz Avenue in West Oak Lane.
About an hour and half later, another 7-Eleven store was robbed on the 7900 block of Frankford in the city's Mayfair section.
In both incidents, the suspects flashed a weapon at the store clerks and then made off with an unknown amount of cash.
Both suspects who fit two different descriptions fled on foot.
Police say the robberies are not connected and they are checking surveillance tapes.
There were no reports of any injuries.