O/R United Airlines Holdings UAL.O and American Airlines Group AAL.O gained 0.4% and 0.7% respectively after Citigroup raised its price target on the stocks. By Medha Singh and Devik Jain June 14 (Reuters) - The S&P 500 was set to open near a record high on Monday as focus shifted to the Federal Reserve's meeting this week, where the central bank is expected to maintain its accommodative stance on monetary policy. While the Fed has reassured that any spike in inflation would be transitory, policymakers could begin discussing the tapering of bond buying at the Tuesday-Wednesday meeting.