diff --git a/packages/flutter/lib/src/cupertino/route.dart b/packages/flutter/lib/src/cupertino/route.dart
index d1eac56638..51f650c6ee 100644
--- a/packages/flutter/lib/src/cupertino/route.dart
+++ b/packages/flutter/lib/src/cupertino/route.dart
@@ -16,7 +16,7 @@
 library;
 
 import 'dart:math';
-import 'dart:ui' show ImageFilter, lerpDouble;
+import 'dart:ui' show ImageFilter;
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
@@ -30,13 +30,8 @@ import 'localizations.dart';
 const double _kBackGestureWidth = 20.0;
 const double _kMinFlingVelocity = 1.0; // Screen widths per second.
 
-// An eyeballed value for the maximum time it takes for a page to animate forward
-// if the user releases a page mid swipe.
-const int _kMaxDroppedSwipePageForwardAnimationTime = 800; // Milliseconds.
-
-// The maximum time for a page to get reset to it's original position if the
-// user releases a page mid swipe.
-const int _kMaxPageBackAnimationTime = 300; // Milliseconds.
+// The duration for a page to animate when the user releases it mid-swipe.
+const Duration _kDroppedSwipePageAnimationDuration = Duration(milliseconds: 350);
 
 /// Barrier color used for a barrier visible during transitions for Cupertino
 /// page routes.
@@ -796,7 +791,7 @@ class _CupertinoBackGestureController<T> {
     //
     // This curve has been determined through rigorously eyeballing native iOS
     // animations.
-    const Curve animationCurve = Curves.fastLinearToSlowEaseIn;
+    const Curve animationCurve = Curves.fastEaseInToSlowEaseOut;
     final bool isCurrent = getIsCurrent();
     final bool animateForward;
 
@@ -818,14 +813,7 @@ class _CupertinoBackGestureController<T> {
     }
 
     if (animateForward) {
-      // The closer the panel is to dismissing, the shorter the animation is.
-      // We want to cap the animation time, but we want to use a linear curve
-      // to determine it.
-      final int droppedPageForwardAnimationTime = min(
-        lerpDouble(_kMaxDroppedSwipePageForwardAnimationTime, 0, controller.value)!.floor(),
-        _kMaxPageBackAnimationTime,
-      );
-      controller.animateTo(1.0, duration: Duration(milliseconds: droppedPageForwardAnimationTime), curve: animationCurve);
+      controller.animateTo(1.0, duration: _kDroppedSwipePageAnimationDuration, curve: animationCurve);
     } else {
       if (isCurrent) {
         // This route is destined to pop at this point. Reuse navigator's pop.
@@ -834,9 +822,7 @@ class _CupertinoBackGestureController<T> {
 
       // The popping may have finished inline if already at the target destination.
       if (controller.isAnimating) {
-        // Otherwise, use a custom popping animation duration and curve.
-        final int droppedPageBackAnimationTime = lerpDouble(0, _kMaxDroppedSwipePageForwardAnimationTime, controller.value)!.floor();
-        controller.animateBack(0.0, duration: Duration(milliseconds: droppedPageBackAnimationTime), curve: animationCurve);
+        controller.animateBack(0.0, duration: _kDroppedSwipePageAnimationDuration, curve: animationCurve);
       }
     }
 
diff --git a/packages/flutter/test/cupertino/nav_bar_transition_test.dart b/packages/flutter/test/cupertino/nav_bar_transition_test.dart
index a99d779480..0494a0b3ce 100644
--- a/packages/flutter/test/cupertino/nav_bar_transition_test.dart
+++ b/packages/flutter/test/cupertino/nav_bar_transition_test.dart
@@ -1376,7 +1376,7 @@ void main() {
     expect(
       tester.getTopLeft(flying(tester, find.text('Page 2'))),
       const Offset(
-        749.863556146621704102,
+        721.4629859924316,
         13.5,
       ),
     );
@@ -1443,7 +1443,7 @@ void main() {
     expect(
       tester.getTopLeft(flying(tester, find.text('Page 2'))),
       const Offset(
-        350.231143206357955933,
+        351.52365279197693,
         13.5,
       ),
     );
diff --git a/packages/flutter/test/cupertino/route_test.dart b/packages/flutter/test/cupertino/route_test.dart
index 8749da1f69..07c9e13f7e 100644
--- a/packages/flutter/test/cupertino/route_test.dart
+++ b/packages/flutter/test/cupertino/route_test.dart
@@ -351,10 +351,10 @@ void main() {
       const Offset(400, 0),
     );
     // Let the dismissing snapping animation go 60%.
-    await tester.pump(const Duration(milliseconds: 240));
+    await tester.pump(const Duration(milliseconds: 210));
     expect(
       tester.getTopLeft(find.ancestor(of: find.text('route'), matching: find.byType(CupertinoPageScaffold))).dx,
-      moreOrLessEquals(798, epsilon: 1),
+      moreOrLessEquals(789, epsilon: 1),
     );
 
     // Use the navigator to push a route instead of tapping the 'push' button.
@@ -1252,13 +1252,13 @@ void main() {
     );
 
     await tester.pump(const Duration(milliseconds: 50));
-    expect(tester.getTopLeft(find.text('1')).dx, moreOrLessEquals(-19, epsilon: 1));
-    expect(tester.getTopLeft(find.text('2')).dx, moreOrLessEquals(744, epsilon: 1));
+    expect(tester.getTopLeft(find.text('1')).dx, moreOrLessEquals(-61, epsilon: 1));
+    expect(tester.getTopLeft(find.text('2')).dx, moreOrLessEquals(614, epsilon: 1));
 
     await tester.pump(const Duration(milliseconds: 50));
     // Rate of change is slowing down.
-    expect(tester.getTopLeft(find.text('1')).dx, moreOrLessEquals(-4, epsilon: 1));
-    expect(tester.getTopLeft(find.text('2')).dx, moreOrLessEquals(787, epsilon: 1));
+    expect(tester.getTopLeft(find.text('1')).dx, moreOrLessEquals(-26, epsilon: 1));
+    expect(tester.getTopLeft(find.text('2')).dx, moreOrLessEquals(721, epsilon: 1));
 
     await tester.pumpAndSettle();
     expect(
@@ -1297,7 +1297,7 @@ void main() {
 
     // Didn't drag far enough to snap into dismissing this route.
     // Each 100px distance takes 100ms to snap back.
-    await tester.pump(const Duration(milliseconds: 101));
+    await tester.pump(const Duration(milliseconds: 351));
     // Back to the page covering the whole screen.
     expect(tester.getTopLeft(find.text('2')).dx, moreOrLessEquals(0));
     expect(navigatorKey.currentState!.userGestureInProgress, false);
@@ -1312,7 +1312,7 @@ void main() {
     expect(navigatorObserver.invocations.removeLast(), NavigatorInvocation.didPop);
 
     // Did go far enough to snap out of this route.
-    await tester.pump(const Duration(milliseconds: 301));
+    await tester.pump(const Duration(milliseconds: 351));
     // Back to the page covering the whole screen.
     expect(find.text('2'), findsNothing);
     // First route covers the whole screen.
diff --git a/packages/flutter/test/material/page_test.dart b/packages/flutter/test/material/page_test.dart
index 3f56b6a88a..e347392016 100644
--- a/packages/flutter/test/material/page_test.dart
+++ b/packages/flutter/test/material/page_test.dart
@@ -881,7 +881,7 @@ void main() {
     await tester.pump(const Duration(milliseconds: 240));
     expect(
       tester.getTopLeft(find.ancestor(of: find.text('route'), matching: find.byType(Scaffold))).dx,
-      moreOrLessEquals(798, epsilon: 1),
+      moreOrLessEquals(794, epsilon: 1),
     );
 
     // Use the navigator to push a route instead of tapping the 'push' button.