These days loans have become such a common thing, that people take loans from banks and other institutions for travel purposes also. To strat with, first decide how much loan you are going to take. If you are going to end up taking a small amount it is advisable to do it with a low interest rate credit card.
If this option turns out to be expensive, then you can look for a personal loan - Think Cash Loans! Yes, some lenders will also offer you cash loans at a higher interest rate ofcourse.
There are travel agents out there who will offer you a loan if you do bookings through them.
IMB Banking and Financial Services are one such inst. which offer you loans at below 9% interest p.a.