JetBlue Airways charges more for seat selection than any other major U.S. airline, according to a NerdWallet analysis, so it pays to know when you can pick a seat for free.

The airline offers several seat options, including standard economy seats, extra-legroom seats and lie-flat Mint suites. But whether you can select a seat for free depends on the type of seat and fare you book, as well as whether you have Mosaic elite status.

Here’s what to know about JetBlue seat selection, including the different seat types, how much seat selection costs and when you can choose a seat for free.

JetBlue seat types

JetBlue offers several onboard experiences, ranging from standard economy to lie-flat business-class seats.

Main

JetBlue’s standard economy product is called Main, and there are three types of seats in this cabin.

Main : Economy seats throughout the Main cabin. These seats may be complimentary, depending on the fare type chosen.

Main Preferred : Economy seats located closer to the front of the cabin.…