Delta raised most domestic one-way fares by $5

, according to J.P. Morgan Securities analyst Jamie Baker. "This represents the eighth broad [network airline] attempt of 2007, with only two of said attempts actually succeeding, the last of which occurred around March 22nd," Baker wrote in a research note. "Given the continued rise in jet kero prices, we ascribe a greater than usual probability of competitive matching," though not in those markets served by discount carriers.