The song "Jet Lag" by Simple Plan is about missing a long distance lover and dealing with the challenges of different time zones. The singer feels lonely and isolated without their partner, waking up to sunsets while they say good morning. Being apart is driving them mad with missing the other person so badly that their heart feels jet lagged. Over multiple verses and choruses, the lyrics express longing to see the same sunrises, share horizons, and turn back time to when they were together again.