There are often English movies at Chiang Mai English Language Movie theaters.

Major Cineplex theaters: see what playing at Airport theatres
4th Floor Airport Plaza
Telephone: 053 283-939
Schedule on Major Cineplex Website
Wednesday movies discount day.

Vista – Kadsuankaew See what is playing at vista theatres
Telephone: 053 894-415
Schedule on Vista Blog

Alliance Francaise
138 Charoenprathet Rd., Muang, Chiang Mai +66 (0)53-275277
E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
French movies in French with English subtitles.  See listings on  Thomat Chiang Mai Film Blog

Every Friday 8pm. Admission Baht 30

Film Space
Media Arts & Design Building, Chiang Mai University Art Museum, Corner of Suthep & Nimmanhaemin Rds., Chiang Mai  +66 (0)53-974846 Ext. 22
Every Saturday 7pm: Admission Free

The ultimate movie guide is

Thomat Chiang Mai Film Blog

A report on the film scene in Chiang Mai, Thailand, including what's playing at the mall cineplexes, the Alliance Française, Film Space at Chiang Mai University, and any film festivals. Plus an attempt at a schedule of times, currently updated on Thursdays, Saturdays, and Mondays.
http://thomatfilms.blogspot.com/

Thai sound trac theatres

Vista Charoen Muang Road 1 & 2, Thai soundtrack, 459/5 Charoen Muang Road
Tel:  o53 260372

Vista Maha Nakhorn Cinema, Thai soundtrack, Chang Phuak Road Tel: 053 221675

Vista Thiphanet Cinema, Thai soundtrack. 124-6 Thiphanet Road Tel: 053 275682