Rapture is not a Biblical term. Nevertheless, we will be taken up into the clouds with Jesus Christ when the time comes. With that said, Jesus made it clear that this would happen after the tribulation.
Notice the relationships between these three scripture references.
"Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken: And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other." (Matthew 24:29-31)
Heaven = οὐρανός through the idea of elevation by extension, implication, happiness, power, eternity; specially, the Gospel (Christianity).
"And hath raised us up together, and made us sit together in heavenly places in Christ Jesus:" (Ephesians 2:6)
"For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:Then we which are alive and remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord." (1 Thessalonians 4:16-17)
"Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed,In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed."
(1 Corinthians 15:51-52)
Immediately after the tribulation. Scripture speaks for itself.