Need a credit card with a high limit but I have bad credit?

My credit score is 506 and I am traveling to Germany but I need a credit card with at least a $2000 limit or more to pay for my airline tickets.
Update: I only have bad credit because i am lazy I just don't pay off my bills and I am not in serious debt I just didn't have any money saved for this trip because it was unexpected and "I have to go" for personal reason.
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