Airline travelers are facing new fees and charges, this time for choosing seating that has nothing to do with whether or not you fly first class.

There have been a rash of complaints from travelers who says they cannot be seated together with other family members or friends unless they pay more. George Hobica of airfarewatchdog.com says some carriers are charging fees for sitting in the front of the economy class section, aisle seats, bulkhead seats and window seats.

The charges for window or aisle seats in the front half of the plane, costing as much as $29 each way on U.S. domestic flights and $59 on international flights, are the latest of a raft of passenger fees introduced in recent years as the airline industry looks to generate new streams of revenue.

The implementation of end-of-row seat fees is part of a broader airline trend to charge for amenities previously included in the standard fare, such as movies, water, pillows and blankets.

Hobica says some airlines are basically trying to squeeze out more fees in the face of higher fuel and labor costs. He says his website has been getting a lot of complaints. Complainants included a woman who had been unable to sit next to her husband, who had a medical condition.