Chicago Symphony Orchestra musicians took to the picket line Saturday night shortly before a scheduled performance.
Musicians and the management of the Chicago Symphony Orchestra on Tuesday morning ratified a new three-year contract.
Musicians went on strike Saturday, forcing the cancellation of a performance. There were differences over wages and health care costs.
Chicago Symphony Orchestra music director Riccardo Muti said he is "most happy" the orchestra is "making music again for the enjoyment of our public."
Details of the agreement weren't provided. The symphony association's board must also ratify the contract.
The symphony and the Chicago Federation of Musicians reached a tentative agreement on Monday evening. If fully ratified, the new contract would take effect retroactively on Sept. 17, 2012.
Details of the new contract were not released.
CSO musicians last went on strike in 1991, forcing the cancellation of three weeks of concerts.
Anyone who missed a scheduled performance due to the strike can exchange them for another show, donate their tickets or receive a refund by calling the box office at 312-294-3000.