You can travel to Bursa via Sabiha Gökçen Airport (Istanbul), Istanbul Airport (Istanbul), or Yenişehir Airport (Bursa).
Sabiha Gökçen Airport to Bursa
BBBus operate buses every 30 minutes right from Istanbul's Sabiha Gökçen Airport to Bursa. You can find buses usually every 30 to 60 minutes, between the airport and the Bursa Coach Terminal. It takes around 75 minutes to reach Bursa Coach Terminal. For details: Burulaş Otobüs Bilgileri
Istanbul Airport to Bursa
There are buses every 1 hour right from Istanbul Airport to Bursa. It takes around 2,5 hour to reach to Bursa Coach Terminal. To by tickets: İstanbul Seyahat Havalimanı Seferleri
Yenisehir Airport to Bursa
If your flight lands at Yenişehir Airport, you can take the local buses to reach Bursa city center. You can use the yellow municipal buses on line 80 to get to the city center.