I am going to Brazil in 4 months. I want to apply for a credit card but I've never had a credit...

The request that you denote - a card for no credit and quite a substantial credit limit - can be satisfied by Capital One credit cards for limited payment history. However, to qualify for such cards, you need to comply with certain requirements, which are as follows: you've had a credit card or have never had one; you are a student or a young adult working for a living, you have a valid credit score at one of the national credit bureaus; you have a permanent address and a stable job income; you have never paid late or missed a payment with any financial companies.

If all these statements are about you, consider applying for the following cards:

Capital One Standard Platinum is a no annual fee card with 0% intro APR on purchases until December, 2008. It can offer you up to $3,000 of limit based on your income. Capital One Classic Platinum has a moderate annual fee and competitive purchase APR after the 0% APR intro period. The same limit applies with this offer. Platinum - Visa has a lowest purchase APR, which would enable you to save on the ticket. Based on the size of your income, this credit card can also give up to $3,000 of limit.

Of course, you can close the card but not until you pay it back in full. Check if you comply with Capital One requirements and apply for a card online.