You can say one of these expressions ; 1) 죄송합니다, 좀 지나갈게요. 
Excuse me, coming through. 
*It's also okay to say only "죄송합니다". 2) 좀 지나가도 될까요? 
May I come through, please? 3) 잠깐만요/잠시만요. Wait a second.

죄송합니다 지나갈게요 잠깐만요 We use those expressions as Excuse me. for me, I just say 잠깐만요~ㅋㅋ

There are several ways to say it So there are no correct answers exactly For me, i say , wait a minute i’m passing 잠시만요 지나갈게요. 잠시만 지나갈게요. Or just 잠시만요 :) If there are actions touching or made someone move Then i would say “sorry” 죄송합니다 잠시만 지나갈게요

As an American (not sure if it's different in other English speaking countries), that is exactly what I say, "excuse me." I may also say, "pardon me." Hope this helps. :)