diff --git i/alacritty/src/input/keyboard.rs w/alacritty/src/input/keyboard.rs
index afb23eb5..0ad4f050 100644
--- i/alacritty/src/input/keyboard.rs
+++ w/alacritty/src/input/keyboard.rs
@@ -87,7 +87,7 @@ impl<T: EventListener, A: ActionContext<T>> Processor<T, A> {
             build_sequence(key, mods, mode)
         } else {
             let mut bytes = Vec::with_capacity(text.len() + 1);
-            if mods.alt_key() {
+            if mods.alt_key() || mods.super_key() {
                 bytes.push(b'\x1b');
             }
 
@@ -104,7 +104,7 @@ impl<T: EventListener, A: ActionContext<T>> Processor<T, A> {
 
     fn alt_send_esc(&mut self, key: &KeyEvent, text: &str) -> bool {
         #[cfg(not(target_os = "macos"))]
-        let alt_send_esc = self.ctx.modifiers().state().alt_key();
+        let alt_send_esc = self.ctx.modifiers().state().alt_key() || self.ctx.modifiers().state().super_key();
 
         #[cfg(target_os = "macos")]
         let alt_send_esc = {
@@ -123,7 +123,7 @@ impl<T: EventListener, A: ActionContext<T>> Processor<T, A> {
                     alt_send_esc
                 } else {
                     // Treat `Alt` as modifier for named keys without text, like ArrowUp.
-                    self.ctx.modifiers().state().alt_key()
+                    self.ctx.modifiers().state().alt_key() || self.ctx.modifiers().state().super_key()
                 }
             },
             _ => text.len() == 1 && alt_send_esc,