US airline fares tumble in April, United Airlines leads capacity pull-back

US airlines are plunging deeply into crisis again, as the weak US economy hits fares and demand for air travel, particularly on international routes. US domestic yields slumped 10.7% in Apr-2009, according to the Air Transport Association of America (ATA), while yields on the Atlantic and Pacific dropped an unprecedented 21.9% and 17.3%, respectively.