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.