As the plane was going down, Elaine said "I have something to tell you." Jerry said "Me too." Then they did some pointless bickering about who would go first, and Elaine said "I've alway's loved--"
But what was Jerry going to say? It was never brought full circle at the trial, when Elaine cracked "I said I love uuuuunited Airlines."
(She didn't say "you" at all while her plane was going down, a reference to the episode where at the company party she and a co-worker made out like their plane was going down.)
This circle remains broken. I wonder what he was going to say?