The suspects, Latisha Richardson, 39, and a man in his 40s allegedly approached the 68-year-old victim in the 75th Avenue station on the F line on April 16 at 6 p.m.
While they were on the stairs leading to a passageway beneath Queens Boulevard, one of the suspects reached into the victim's pocket and grabbed her wallet.
According to cops, the suspects used the victim's credit cards at nearby businesses.
Richardson is 5 feet 6 inches tall, 160 pounds, with black hair and brown eyes, police said.
The male suspect is also 5 feet 6 inches tall, 150 pounds and was last seen wearing a black T-shirt, white jacket, black baseball cap and was carrying a black backpack, police said.
Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS (8477). The public can also submit tips by logging onto the Crime Stoppers website at WWW.NYPDCRIMESTOPPERS.COM or by texting their tips to 274637 (CRIMES) then enter TIP577. All calls are strictly confidential.