Six airlines are changing terminals. Here's what travelers need to know.

LaGuardia Airport Queens New York City Construction Terminal Changes Traffic
Credit: Susan Watts/NY Daily News Archive via Getty Images

If your next flight is out of LaGuardia, in New York City, double check your airline's terminal. And then check it again.

This weekend, over December 9 and 10, travelers at LaGuardia Airport might get a little confused about where to find their flights. Six major airlines — yes, six — will be moving to different terminals due to a major construction project happening at LGA, which is scheduled to be completed by 2021.

LaGuardia Airport Queens New York City Construction Terminal Changes Traffic
Credit: Getty Images

Passengers on Alaska Airlines, American Airlines, Delta Shuttle, Frontier, JetBlue and Spirit will be heading to new terminals for departure. Officials at the Port Authority of New York & New Jersey, have for weeks been spreading the word on where to go starting on Saturday, based on your departing airline.

Beginning Saturday, December 9, Alaska Airlines passengers will find their flights at Terminal A.

American Airlines and American Shuttle fliers should head to Terminal B.

Passengers on Delta Shuttle should go to Terminal C.

On both Frontier and Spirit Airlines, the LGA terminal for departures is Terminal C, but you can pick up your loved ones arriving on those airlines at Terminal D.

Other airlines at LGA including Air Canada, Southwest Airlines and United Airlines will not be moving from their current terminal.

If you're flying on an airline not listed here, the full list of carriers that operate at LaGuardia (and their terminals) and the LGA terminal map is available on the airport website. However, the terminal moves are not yet reflected, so just to be safe, check your terminal here again.

Often derided as the worst airport in the U.S., the massive terminal change is unlikely to get LaGuardia more fans. However, it is in the name of progress as New York City works on a major upgrade to the hub.