How Long Does Wendy's Serve Breakfast. Wendy’s breakfast menu has a lot of. The breakfast menu at wendy’s is served only from 6:30 a.m. Subway Hours of Operations [UPDATED] from mcdonaldsfaq.com A few locations might start serving the lunch from 11 am on weekends. Most wendy’s restaurant serves breakfast from 6:30 am to 10:30 am. …