Northwest Doubles Ticket Fees (Continued) Northwest increased its fees to $10 for tickets purchased through its reservation lines. Fees on tickets purchased at airport ticket counters increased to $20 from $10. The airline also doubled its fees, to $30, for frequent fliers who obtain their award tickets through an airport ticket agent. American Airlines last month raised its fees on tickets purchased through its reservation center to $10 from $8. American also charges $15 for tickets purchased at the airport and $15 for frequent-flier award tickets purchased through its call center. US Airways charges a $5 fee for tickets sold through its reservation agents, $10 for tickets sold at the airport and $5 for award tickets issued through a reservation agent. Delta Air Lines' fee is $10 for purchases over the phone, $15 at the airport and $10 for award travel through an agent. Source: Washington Post