The travel industry is in the midst of another hot summer as Americans hit the road and make for the airport to take advantage of slightly cheaper flights and gas. But the 2024 vacation outlook isn’t all sunny: Like the rest of the American consumer experience this year, it is sharply divided. Many richer consumers — always the lifeblood of the travel industry — are feeling good this year as a strong stock market and rising home values boost their wealth. While they have felt the bite of...