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まで行ってきた

went to ... and came back

→ まで
phrase Rare #24,167
went to ... and came back Indicates going to a place and then returning, often with the sense of having just done so. The place before まで is the destination.
JA: コンビニまで行ってきた。
EN: I went to the convenience store and came back.

彼を見送りに駅まで行ってきたところです。

I just went to the station to see him off.

私はおじを見送りに駅まで行ってきたところだ。

I just got back from seeing my uncle off at the station.

車で海岸まで行ってきた。

I drove to the coast and back.

仕事で大阪まで行ってきた。

I went all the way to Osaka for work.

友人を迎えに駅まで行ってきたところだ。

I just got back from going to the station to pick up a friend.