The nearest airport is Dortmund Airport. From here you can take the AirportExpress bus to Dortmund Central Station (and the city centre). Direct trains then take 5 minutes to Dortmund Signal Idun Park which is a short walk (10 minutes) to the venue.
BY PUBLIC TRANSPORT:
The venue is well connected via public transport. One option is to head to Westfalenstadion Station (on the U45 line). From there it is only 6 minutes to the venue on foot.
The festival is 16+.