Jet Blue Boston Logan

A JetBlue Airways Embraer ERJ-190 on approach at Logan Airport in 2011.

(Tony Hisgett, Creative Commons Flickr)

BOSTON -- The largest airline at Logan Airport, JetBlue, is known for its comfy seats and low fares but all of that is about to change.

The popular low cost boutique airline announced to investors on Wednesday that most passengers will have to pay for checked bags by mid-2015. The new plan will divide passengers into three separate classes and only some in the top two ticket classes will be exempt from the baggage fees.

A fee schedule for checked bags has not been announced.

The airline's spacious legroom will soon be a thing of the past on most JetBlue flights, too.

JetBlue will start retrofitting the cabins on its A320 planes to hold an additional 15 seats, a move that will reduce the legroom of the typical passenger from 34 inches to 33 inches. The 33 inches of legroom will still be two inches more than the industry standard of 31 inches.

The changes are expected to generate $200 million in annual revenues for the airline.

JetBlue operates non-stop flights from Boston to over 50 locations across North America making them the largest carrier out of Logan Airport.

JetBlue began offering non-stop service between Worcester and Orlando and Fort Lauderdale in November of 2013. The airline recently exceeded initial passenger expectations.

JetBlue began flying in 2000 with flights between Buffalo and Fort Lauderdale.