(assuming that you're asking someone) You should care about stress. There are differences in meanings. "У тебя есть билет?" - neutral, you just wonder if he\she has a ticket. "У тебя БИЛЕТ?" - Gosh, you have a ticket on the show of Jamiroquai, what a surprise! "Билет у тебя?" (2 stresses, both on "билет" и "тебя", a bit more on "тебя") - you're asking if he\she have that ticket you've talked about recently. Neutral. "БИЛЕТ у тебя?" - Gosh, you are so stupid, I'm asking the third time and you cannot give the answer to the very simple question - if you have a ticked you've talked recently.
BTW, "У тебя билет?" with neutral tone sounds awkward. It doesn't sound Russian. As you may see, most of people advise you to say "Билет у тебя?" - it's correct, and at the same time a bit informal.
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You should care about stress. There are differences in meanings.
"У тебя есть билет?" - neutral, you just wonder if he\she has a ticket.
"У тебя БИЛЕТ?" - Gosh, you have a ticket on the show of Jamiroquai, what a surprise!
"Билет у тебя?" (2 stresses, both on "билет" и "тебя", a bit more on "тебя") - you're asking if he\she have that ticket you've talked about recently. Neutral.
"БИЛЕТ у тебя?" - Gosh, you are so stupid, I'm asking the third time and you cannot give the answer to the very simple question - if you have a ticked you've talked recently.
BTW, "У тебя билет?" with neutral tone sounds awkward. It doesn't sound Russian. As you may see, most of people advise you to say "Билет у тебя?" - it's correct, and at the same time a bit informal.