You can soon pay to avoid sharing armrests on this airline

• Frontier Airlines is giving passengers the option to pay for an empty middle seat.

• The airline announced it will allow customers to pay extra to sit in rows with only two passengers.

• The "UpFront Plus" seating upgrade starts at $49 and will be available on April flights.

Fliers will soon be able to enjoy the ensured luxury of both armrests on their next budget flight.

Frontier Group Holdings Inc., which owns the ultra-low-cost Frontier Airlines, announced Tuesday that it will allow customers to pay extra to sit in specially designated rows that block off the middle seat.

Aisle-dwellers and window-seat devotees with a little extra dough to spend will be able to bypass the infamous tight quarters of Frontier's flights starting next Month, the company's CEO announced at a Tuesday industry conference, according to Bloomberg.

The "UpFront Plus" upgrade option starts at $49 and will be available on Frontier flights starting April 10. That price is being marketed as a special introductory offer. It was not immediately clear how much the upgrade would cost after the promotion ends.