Years ago you could get extra legroom for free by asking for an exit-row or bulkhead seat. Now, you'll need these tips to get a little more space.

Since most U.S. airlines have added dedicated extra-legroom sections to their economy-class cabins recently, you often have to pay up to get any legroom relief—unless you’re a very frequent flier.

Even so, there are ways to get better value out of the extra legroom you’re paying for, as airlines continue to one-up each other on benefits and experiment with different prices for a bit more space. Here are five tips for getting the very best seat for your money: