Delta Air Lines raised by $5 most domestic one-way fares

, "pushing its increasingly irrelevant SimpliFare cap to $704, an 18 percent increase from March’s $599 level," according to a report issued by J.P. Morgan Securities analyst Jamie Baker. "Given continued [Middle East] uncertainty and the reality of $74 crude--and with scant evidence of consumer elasticity as fares push ever higher--other carriers are likely to match over the next 48 hours."