Buying gold at Dubai Aiport could be a last minute thing. Also, if you are visiting Dubai on a stopover and have no opportunity to get out of the airport area, you may be tempted to shop for gold and other items at the Dubai Duty Free. Speaking with many people, we have come across mixed reviews for buying gold here. Generally, over the years, the level of customer service at the gold shops in the Dubai Duty Free has declined, however if you know exactly what you want then shopping at Dubai Duty Free is not a bad option. Most people have commented that sometimes good deals can be had here. We have compared the value of what you can get versus the gold souk and Dubai Airport doesn't come close.
Although if you are planning to buy many gold items, it might be better to initially request for a longer stopover with your airline if you are not in a hurry to reach your final destination so that you can visit the gold souk in Deira. It is worth it for the variety of designs on offer and better bargaining can be had.