> Last year, SNCF relaunched overnight services between Paris and Nice, with tickets starting as low as 19 euros, about $21, for a midweek low-season ticket. That compares with 31 euros, not including baggage fees or the cost of airport transfers, for a short flight on EasyJet These prices are inconceivable in the US, where competition in air travel has essentially been eliminated.
And yet US airlines (United/American/Delta/Southwest/Alaska/JetBlue) are barely profitable, if not losing money many years. The most hated airline, Spirit, has the most consistent profit margin 10%+, but all the others are near 0% most years.
Like most forms of infrastructure, American traveling preferences are driven mostly by a mixture of emotion and lobbying. Air travel doesn't make much economic sense and hasn't for years.