There are two different phases of the flight of the Woman which is the Church-Israel.

.........One....the flight of the Jews that Jesus spoke of in Matthew 24:15-22
.........Two...a different flight of other 'saints' at the beginning of the Great Tribulation.

.....................................The flight of the Woman is mentioned twice in Revelation 12. Some think is was for emphasis, But it's not. Every sentence in the Book is significant. It's written twice because there are two phases to it.