airports
Bursa-Yenişehir Airport operates domestic flights and a few international flights. However, you can usually reach Bursa from abroad via transit from Türkiye's international airports. The closest international airports to Bursa are Istanbul Airport and Istanbul Sabiha Gökçen Airports. You can travel to Bursa by going to Bursa Bus Terminal from Istanbul Airport with BBBUS or by taking the sea bus from Yenikapı Port. You can reach Bursa directly from Istanbul Sabiha Gökçen Airport by BBBUS buses in 90 minutes. You can also reach Bursa center from Yenişehir Airport by public buses and taxi.

For detailed information; 

https://dhmi.gov.tr/Sayfalar/Havalimani/Yenisehir/AnaSayfa.aspx
https://www.sabihagokcen.aero/homepage
https://www.istairport.com/tr