Yes, it is possible, but being "possible" here makes this kind of supernatural communication neither desirable nor safe. Shakey biblical support for this is found in Christ's transfiguration before Peter, James and John and conversation with Moses and Elijah, both parties who had clearly left this Earthly world and were current inhabitants of the next one in glory:
"Now after six days Jesus took Peter, James, and John his brother, brought them up on a high mountain by themselves, and was transfigured before them. His face shone like the sun, and His clothes became as white as the light. And behold, Moses and Elijah appeared to them, talking with Him." Matthew 17:1-3
It is likewise possible to utterly disregard the personal commandment of God for you, turn from his desired course for your own choice, board a ship bound for the exact opposite end of the world unto which the Lord had commanded you to proceed, be thrown overboard by reluctant seamen during a horrific tempest, be swallowed by an enormous whale, (or the likes,) and so endure these unenviable accommodations for three days underwater, and last, (but not least,) be belched out upon a foreign beach to thereafter readily pursue your original and Divinely commanded course. This, of course, refers to the highly singular and exceptional experience of Jonah the Prophet of the Old Testament.
My advice is, don't ever gamble upon any biblical exception justifying a current norm of allowance. Believe me, seeking communications with the dead will instantly qualify you to become an ideal candidate for demonic deception. All hell will rejoice over such an over-spiritually zealous seeking soul who is just what they were looking for, and they are very, very good at deceiving. If you do desire communications with the "other side" though, then head straight for the communion of the Holy Spirit of God, whom the resurrected and ascended Lord Jesus Christ will send both into and upon all those who seek reconciliation with God the Father through the bloody and substitutionary Cross of Christ. This Person from the "other side" has yet to deceive, harm or entrap any who have honestly sought Him upon terms of biblical truth. God allowed this saintly communication to Christ once for the purpose of manifesting the general truth that, "with God, all things shall be possible", and yet allowed it only once for the purpose of preventing such experiences from becoming a rule amongst God's people and so open them up to a landslide of demonic counterfeits. Avoid this practice.