http://www.emjc3.com/proof/pretribulationrapture.htm

Case for The Pre-Tribulation RaptureThe Bible lays out a plan for human history. In this plan there will be a time called 'The Great Tribulation.' I present the following article to show that Christians will not go through The Great Tribulation. We might suffer some trials and tribulation but will be raptured before things get real bad. I offer four reasons for this --

(1) Rom 5:9 says, "We shall be saved from wrath."  I Thess 5:9 "God has not appointed us to wrath" Rev 11:18 declares, "Thy wrath is come." And Rev 6:17 says, "For the great day of his wrath is come; and who shall be able to stand?"If Christians are not subject to God’s wrath and the Great Tribulation is God’s wrath, the conclusion has to be: The Church will not experience the Great Tribulation.

(2) The Great Tribulation is God's judgment upon the Earth: e.g. Rev 6:12 says those on the earth try to hide and they call for the rocks and the mountains to fall upon them and hide them from the wrath of the Lamb for the great day of His [God's] wrath has come, and they question, "Who shall be able to stand?" God has never judged His people along with the unrighteous:e.g. God couldn't judge Sodom and Gomorrah until Lot was gone see Genesis 19:22.   God's judgment didn't flood the Earth until Noah and his family were on board the ark  

(3) In 1Thes 4:16-18 Paul, speaking of the rapture says, 16        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:  17        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.18        Wherefore comfort one another with these words.The church is the Bride of Christ. God is going to marry us one day (technically, He already is married to us). Notice in verse 18 Paul says to "comfort one another with these words." Suppose we do go through the tribulation, what is comforting about saying, As the Bride of Christ we will forever be with the Lord, but first God is going to come and beat the tar out of us (during the great tribulation), comfort one another with these words.

(4) In Rev 3:10 God says, "Because you have kept My command to persevere, I also will keep you from the hour of trial which shall come upon the whole world, to test those who dwell on the earth." (NKJV)(Notice, He says He will keep you from the hour of trial, you won't go through it or even go through part of it, but you will be kept from it. You will be removed before it begins. Moreover, Thomas Ice reminds us that there are two events which are sometimes confused (the rapture, and the second coming of Christ - see chart) and gives us additional reasons the Bible supports a pre-tribulation rapture.  

The Rapture	The Second Coming of Christ
Translation of all believers	No translation at all
Translated saints go to heaven	Translated saints return to Earth
Earth not judged	Earth Judged & righteousness established
Imminent, any moment, signless	Follows definite predicted signs
Affects Believers only	Affects all men
Before the day of wrath	Concluding the day of wrath
Christ comes for His own	Christ comes with His own
Christ meets us in the air	Christ comes to the Earth
Only His own see Him	Every eye shall see Him
Great Tribulation begins	Millennial Kingdom begins