A free plane ticket is one of the more popular incentives used to woo credit card customers these days. And with airfares on a steady increase, the attractiveness of a free flight has only increased. So, with summer travel season in full swing, we decided to conduct a survey to find out which credit cards offered free airline ticket introductory promos.

We found 17 cards that fit the bill. Not surprisingly, most of them were airline affinity credit cards, but they included general reward cards as well. In part of what seems to be a growing trend across all credit cards, most of the intro promotions require at least some level of spending in order to earn the full number of bonus miles, so as to discourage customers who only use the card for the sign up bonus. Also, as is the standard for airline-affiliated credit cards, virtually all carry an annual fee, though some of them do waive it for the first year.

You can find the full list of cards along with details here.