Again I was watching, the Universe I think it was.. It was said that if one could travel by gravity to anywhere through the earth it would always take 49 minutes.. I have to double check how long but it was said everytime and no matter which "tunnel" you took it would always take the same amount of time.. Gonna check the facts of this and post it here!

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Please don't give up, Des. Because all we really need to survive is one person who truly loves us. And you have her. I will wait for
you. Always. I love you, Pen

DESMOND: I love you, Penny. I've always loved you. I'm so sorry. I love you!
PENNY: I love you too.
DESMOND: I don't know where I am, but--
PENNY: I'll find you, Des--
DESMOND: --I promise--
PENNY: --no matter what--
DESMOND: --I'll come back to you--
PENNY: --I won't give up--
BOTH: I promise. I love you.