The season started on the weekend of 21–22 July 2018 and concluded on 25 May 2019 with a break between 17 December 2018 and 2 February 2019.
[4] In May 2018, the Swiss Football League voted in favor of reintroducing the relegation play-offs, starting from the 2018–19 season.
Ninth placed Xamax faced Aarau, the runner-up of 2018–19 Swiss Challenge League.
Neuchâtel Xamax won on penalties after drawing 4–4 on aggregate and will stay in the Swiss Super League.
Djibril Sow (Young Boys) Dejan Sorgic (Thun)