行って来たところだ

have just gotten back from

→ 行く
phrase Uncommon #10,628
have just gotten back from Used to say that someone has just returned after going somewhere. 行って来た means “went and came back,” and ところだ emphasizes that it happened just now. The polite form is 行って来たところです.
JA: さっきコンビニに行って来たところだ。
EN: I just got back from the convenience store.

私は叔父を見送りに駅まで行って来たところだ

I just went to the station to see my uncle off.

小包を出し郵便局へ行って来たところだ

I just got back from the post office, where I went to mail a package.

彼は友達を見送りに駅行って来たところだ

He’s just gotten back from the station, where he went to see his friend off.

を見送りに空港行って来たところだ

I just got back from the airport after seeing my father off.

理髪店行って来たところだ

I just got back from the barber.