Ole Gunnar Solskjaer is willing to let the Chilean depart before the European transfer window closes on September 2.
And Sanchez appears close to sealing a move to San Siro after agreeing to take a financial hit.
The former Barcelona forward currently earns £500,000 a week, but he is willing to earn less in exchange for more regular first-team football at Inter.
Antonio Conte's side want to sign Sanchez on a 12-month loan with an upfront fee of £4.5m, followed by a second season-long loan spell worth £16.5m.
United would prefer a permanent transfer with Inter paying £22m this summer, although both parties are expected to reach an agreement.
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