Delta Air Lines’ recent success set off a debate on Wall Street on whether the airline sector is primed to repeat a late-year rally.

The way the broader S&P 500 index has been headed lately (higher and higher) brings about a new narrative importance for markets to justify today’s valuations and the assumptions that need to become true if the entire market is set to keep going.

United Airlines said on Wednesday travel demand has picked up since the beginning of July, thanks to less geopolitical and macroeconomic uncertainty.

(Reuters) -United Airlines shares fell 3% in premarket trading on Thursday, after the U.S. carrier flagged a hit to third-quarter earnings from operational snags at Newark airport. The Newark airport,

United Airlines reported a drop in second-quarter profits Wednesday on higher costs and predicted a rise in travel as geopolitical worries ease.