While first class air travel has been on the decline in recent years, it remains a key part of the premium domestic market in the United States. The big three legacy carriers - American Airlines, ...

Delta's revenue from premium seats like business class rose 6% in the first half of the year to $10.6 billion, while main ...

Delta's revenue from premium seats like business class rose 6% in the first half of the year to $10.6 billion, while main cabin economy ticket revenue dropped 4% to $11.7 billion.

Other airlines offer more spacious seats within business class and first class. Delta Air Lines is studying new types of airplane tickets — this time in the premium cabins at the front of the plane.

While these flights offer upgraded seating, the service is typically comparable to domestic first class, not the full international experience.

FILE - Long lines of travelers at Los Angeles International Airport in December 2012.

Southwest CEO Bob Jordan said the airline is open to airport lounges and higher-end service like Europe flights and more ...

As United continues its quest to dethrone Delta as the most premium airline in the United States, both carriers are continually and incrementally improving their domestic first class hard product.

The new Delta Sky Club and Delta One lounge at the Seattle airport share a light-filled, two-story space with great views of Mt. Rainier and the tarmac.

Mary Kay McBrayer upgraded to first class for an overnight flight with her 8-month-old. She booked coach on the return flight and was much happier.