Any intended traveller travelling during summer or festive period should purchase his/her ticket now because promo on different airlines are ending in due time , so if you are travelling in July,august, and September 2017 for a short vacation , i will advise you start booking your flight now.
3-4 weeks before flight departure is not advisable during summer and festive season, reason being that you have to consider foreign currency exchange rate and besides, we have fewer airlines travelling out of Nigeria. A stitch in time saves nine. thanks

gabson02:
How to fill ds-160

Are you asking a question or do you want to lecture us on it?