This question can only be answered through the Bible;

John 316: "For God so loved the world that He gave His only begotten Son that whosoever believed in HIm will not PERISH but HAVE EVERLASTING LIFE.

John 14:6, JESUS said, I AM THE WAY, THE TRUTH AND THE LIFE NO ONE COMES TO THE FATHER, BUT BY ME.

Ephesians 2:8-9,

8For it is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God— 9not by works, so that no one can boast.

Romans 10:9-10, "

9That if you confess with your mouth, "Jesus is Lord," and believe in your heart that God raised him from the dead, you will be saved. 10For it is with your heart that you believe and are justified, and it is with your mouth that you confess and are saved.

John 1:12,

12Yet to all who received him, to those who believed in his name, he gave the right to become children of God—

Philippians 2:9-11,

9Therefore God exalted him to the highest place
and gave him the name that is above every name,
10that at the name of Jesus every knee should bow,
in heaven and on earth and under the earth,
11and every tongue confess that Jesus Christ is Lord,
to the glory of God the Father.

1 John 5:11-13

11And this is the testimony: God has given us eternal life, and this life is in his Son. 12He who has the Son has life; he who does not have the Son of God does not have life. 13I write these things to you who believe in the name of the Son of God so that you may know that you have eternal life.

So if you don't believe in Jesus and do not trust in Jesus and have not faith in Jesus, when you die you are separated from God and Jesus the Son of God.

Jesus is the only way to Heaven.