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.

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

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, ...

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

On the 767, Delta also sells international premium economy as domestic Comfort, and it’s priced the same $259 one-way as Comfort on all the nonstop flights that day.

Most notably, Delta Air Lines launched a first-of-its-kind collab with Shake Shack in December to bring the chain’s popular cheeseburgers to first-class cabins on domestic flights of more than ...

Delta Air Lines is adding new nonstop Saturday flights to various destinations starting in June. New routes include flights from Atlanta to Bangor and Rapid City; Detroit to Pensacola, Destin-Fort ...

What are the new Delta nonstop Saturday flights? Atlanta International Airport (ATL) Bangor Internatinal Airport (BGR), from June 8 to Sept. 25, with a Boeing 737-800 Rapid City Regional Airport (RAP) ...

First Class Returns (The Trade) I've already built large long-term positions in Delta at ~$40. I've done extremely well selling calls when it reached about $60 last year, and closing them this April.

Note that a domestic first-class ticket typically does not provide access to an airline lounge, and not all airlines offer first class. Some offer business class as their highest-tier cabin instead.