diff --git a/c3.js b/c3.js
index 4dc0535..92e40fc 100644
--- a/c3.js
+++ b/c3.js
@@ -3944,6 +3944,7 @@
                     flowEnd = getValueOnIndex(c3.data.targets[0].values, flowIndex + flowLength),
                     orgDomain = x.domain(),
                     durationForFlow = options.flow.duration || duration,
+                    onend = options.flow.onend || function () {},
                     wait = generateWait();
 
                 // remove head data after rendered
@@ -4025,8 +4026,8 @@
                         .attr("width", __axis_rotated ? width : rectW)
                         .attr("height", __axis_rotated ? rectW : height);
 
-                        // callback here?
-
+                    // callback for end of flow
+                    onend();
                 });
             } : null);
 
@@ -4778,7 +4779,8 @@
                 flow: {
                     index: c3.data.targets[0].values[0].index,
                     length: length,
-                    duration: args.duration
+                    duration: args.duration,
+                    onend: args.onend,
                 },
                 withLegend: true
             });
diff --git a/c3.min.js b/c3.min.js
index 83a9ef8..181ac3b 100644
--- a/c3.min.js
+++ b/c3.min.js
@@ -1,3 +1,3 @@
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0},hg.data.getAsTarget=function(a){var b=hg.data.targets.filter(function(b){return b.id===a});return b.length>0?b[0]:void 0},hg.data.names=function(a){return arguments.length?(Object.keys(a).forEach(function(b){lh[b]=a[b]}),Mf({withLegend:!0}),lh):lh},hg.data.colors=function(a){return arguments.length?(Object.keys(a).forEach(function(b){vh[b]=a[b]}),Mf({withLegend:!0}),vh):vh},hg.x=function(a){return arguments.length&&(Cc(hg.data.targets,a),Mf({withUpdateOrgXDomain:!0,withUpdateXDomain:!0})),hg.data.xs},hg.xs=function(a){return arguments.length&&(Dc(hg.data.targets,a),Mf({withUpdateOrgXDomain:!0,withUpdateXDomain:!0})),hg.data.xs},hg.axis.labels=function(a){arguments.length&&(Object.keys(a).forEach(function(b){hb(b,a[b])}),Jb())},hg.axis.max=function(a){arguments.length&&("object"==typeof a?(b(a.x)&&(ei=+a.x),b(a.y)&&(li=+a.y),b(a.y2)&&(ui=+a.y2)):li=ui=+a,Mf({withUpdateOrgXDomain:!0,withUpdateXDomain:!0}))},hg.axis.min=function(a){arguments.length&&("object"==typeof a?(b(a.x)&&(fi=+a.x),b(a.y)&&(mi=+a.y),b(a.y2)&&(vi=+a.y2)):mi=vi=+a,Mf({withUpdateOrgXDomain:!0,withUpdateXDomain:!0}))},hg.axis.range=function(a){arguments.length&&("undefined"!=typeof a.max&&hg.axis.max(a.max),"undefined"!=typeof a.min&&hg.axis.min(a.min))},hg.legend.show=function(a){_f(Pc(a)),Mf({withLegend:!0})},hg.legend.hide=function(a){ag(Pc(a)),Mf({withLegend:!0})},hg.resize=function(a){kg=a?a.width:null,lg=a?a.height:null,hg.flush(),hg.flush()},hg.flush=function(){Sf({withLegend:!0,withTransition:!1,withTransitionForTransform:!1})},hg.destroy=function(){hg.data.targets=void 0,hg.data.xs={},lk.classed("c3",!1).html(""),a.onresize=null},"url"in f.data)gg.xhr(f.data.url,function(a,b){var c,d=gg.csv.parseRows(b.response);1===d.length?(c=[{}],d[0].forEach(function(a){c[0][a]=null})):c=gg.csv.parse(b.response),Ef(c)});else if("rows"in f.data)Ef(Fc(f.data.rows));else{if(!("columns"in f.data))throw Error("url or rows or columns is required.");Ef(Gc(f.data.columns))}return hg},"function"==typeof define&&define.amd?define("c3",["d3"],f):"undefined"!=typeof exports&&"undefined"!=typeof module?module.exports=f:a.c3=f}(window);
\ No newline at end of file
diff --git a/htdocs/samples/api_flow.html b/htdocs/samples/api_flow.html
index 3e5da01..6b1bec0 100644
--- a/htdocs/samples/api_flow.html
+++ b/htdocs/samples/api_flow.html
@@ -67,7 +67,16 @@
             ['data2', 100],
             ['data3', 200],
           ],
-          duration: 500
+          duration: 500,
+          onend: function () {
+            chart.flow({
+              columns: [
+                ['data1', 200],
+                ['data3', 100]
+              ],
+              duration: 150
+            });
+          }
         });
       }, 1000);
 
@@ -80,7 +89,7 @@
           ],
           duration: 150
         });
-      }, 2000);
+      }, 3000);
 
       setTimeout(function () {
         chart.flow({
@@ -90,7 +99,7 @@
             ['data3', 400]
           ]
         });
-      }, 3000);
+      }, 4000);
 
     </script>
   </body>