Paul does not state where they go after they meet the Lord in the air, he simply states "... to meet the Lord in the air. And so we will be with the Lord forever. "
This passage has no indication whatsoever about where they go after meeting in the air, only that they will remain together forever.
We have an indication in Revelation 19. Key words marriage supper; clothed in white linen mentioned twice:
Revelation 19:6-14 NKJV
And I heard, as it were, the voice of a great multitude, as the sound of many waters and as the sound of mighty thunderings, saying, “Alleluia! For the Lord God Omnipotent reigns! Let us be glad and rejoice and give Him glory, for the marriage of the Lamb has come, and His wife has made herself ready.” And to her it was granted to be arrayed in fine linen, clean and bright, for the fine linen is the righteous acts of the saints. Then he said to me, “Write: ‘Blessed are those who are called to the marriage supper of the Lamb!’ ”
And he said to me, “These are the true sayings of God.” And I fell at his feet to worship him. But he said to me, “See that you do not do that! I am your fellow servant, and of your brethren who have the testimony of Jesus.
Worship God! For the testimony of Jesus is the spirit of prophecy.” Now I saw heaven opened, and behold, a white horse. And He who sat on him was called Faithful and True, and in righteousness He judges and makes war. His eyes were like a flame of fire, and on His head were many crowns.
He had a name written that no one knew except Himself. He was clothed with a robe dipped in blood, and His name is called The Word of God. And the armies in heaven, clothed in fine linen, white and clean, followed Him on white horses.