"Separate Ways (Worlds Apart)" is a song by Journey from their album Frontiers and released as a single on January 5, 1983. It peaked at #8 for six consecutive weeks on the Billboard Hot 100 chart, and spent four weeks at #1 on the Top Tracks chart.

To accompany the song on MTV, the band shot its first-ever concept video. It was a difficult experience for a variety of reasons, and the resulting clip has been named as one of the worst videos ever.

The song was used in the Disney film Tron: Legacy (2010), the sequel to the Academy Award-nominated film Tron (1982), and also was used in the Journey arcade game produced by now-defunct Midway Games—the same company who manufactured both the Tron arcade game and its sequel, Discs of Tron. This song also appears as the mobile phone ringtone of Carl Allen, the main character in the comedy film Yes Man (2008).

The song was written in 1982 during the Escape tour. It is not certain exactly when, or the first time it was performed live. Some sources will claim the 1982 Day on the Green concert, where singer Steve Perry told the crowd, "We just wrote this song about two weeks ago", as the first performance. But bootleg recordings exist of performances at least a month earlier at Chicago's Rosemont Horizon, where Perry also says the song was two weeks old.

There were some minor differences in the lyrics on this live debut compared to the final version found on Frontiers. In a 2008 interview, guitarist Neal Schon recalled the first time it was played live:

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