 Spirit Airlines Inc. SAVE, 0.61 reported Tuesday a narrower-than-expected second-quarter loss and revenue that topped pre-pandemic 2019 levels, amid increased flight volume and higher revenue per seat as demand for leisure travel was robust during the peak summer season. The discount air carrier, that agreed in late July to merge with JetBlue Airways Corp. JBLU, -0.58 in a 3.8 billion deal, said net losses narrowed to 52.4 million, or 48 cents a share, from 287.9 million, or 2.73 a share, in the year-ago period, but compared with net income of 114.5 million, or 1.67 a share, in the same period in 2019. 