diff --git a/aircraft_cmd.c b/aircraft_cmd.c
--- a/aircraft_cmd.c
+++ b/aircraft_cmd.c
@@ -269,6 +269,8 @@ int32 CmdBuildAircraft(int x, int y, uin
 		InvalidateWindow(WC_COMPANY, v->owner);
 	}
 
+	InvalidateWindow(WC_REPLACE_VEHICLE, VEH_Aircraft); //updates the replace Aircraft window
+
 	return value;
 }
 
@@ -322,6 +324,8 @@ int32 CmdSellAircraft(int x, int y, uint
 
 	}
 
+	InvalidateWindow(WC_REPLACE_VEHICLE, VEH_Aircraft); // updates the replace Aircraft window
+
 	return -(int32)v->value;
 }