diff --git a/serverless/functions/user.yml b/serverless/functions/user.yml
index 6c15442..99cb242 100644
--- a/serverless/functions/user.yml
+++ b/serverless/functions/user.yml
@@ -498,6 +498,21 @@ getAllUserSavedItineraries:
         path: /itinerary/get-all-user-saved-itineraries
         method: get
 
+cancelUserItinerary:
+  handler: src/modules/user/handlers/itinerary/cancelUserItinerary.handler
+  memorySize: 512
+  package:
+    patterns:
+      - 'src/modules/user/**'
+      - ${file(./serverless/patterns/base.yml):pattern1}
+      - ${file(./serverless/patterns/base.yml):pattern2}
+      - ${file(./serverless/patterns/base.yml):pattern3}
+      - ${file(./serverless/patterns/base.yml):pattern4}
+  events:
+    - httpApi:
+        path: /itinerary/cancel-itinerary
+        method: post
+
 createRazorpayOrder:
   handler: src/modules/user/handlers/payment/createOrder.handler
   memorySize: 512
diff --git a/src/modules/user/handlers/itinerary/cancelUserItinerary.ts b/src/modules/user/handlers/itinerary/cancelUserItinerary.ts
new file mode 100644
index 0000000..929dd4a
--- /dev/null
+++ b/src/modules/user/handlers/itinerary/cancelUserItinerary.ts
@@ -0,0 +1,64 @@
+import { APIGatewayProxyEvent, APIGatewayProxyResult, Context } from 'aws-lambda';
+import { prismaClient } from '../../../../common/database/prisma.lambda.service';
+import { verifyUserToken } from '../../../../common/middlewares/jwt/authForUser';
+import { safeHandler } from '../../../../common/utils/handlers/safeHandler';
+import ApiError from '../../../../common/utils/helper/ApiError';
+import { ItineraryService } from '../../services/itinerary.service';
+
+const itineraryService = new ItineraryService(prismaClient);
+
+export const handler = safeHandler(async (
+  event: APIGatewayProxyEvent,
+  context?: Context,
+): Promise<APIGatewayProxyResult> => {
+  const token = event.headers['x-auth-token'] || event.headers['X-Auth-Token'];
+  if (!token) {
+    throw new ApiError(
+      400,
+      'This is a protected route. Please provide a valid token.',
+    );
+  }
+
+  const userInfo = await verifyUserToken(token);
+  const userId = Number(userInfo.id);
+
+  if (!userId || Number.isNaN(userId)) {
+    throw new ApiError(400, 'Invalid user ID');
+  }
+
+  let body: Record<string, any> = {};
+  if (event.body) {
+    try {
+      body = JSON.parse(event.body);
+    } catch {
+      throw new ApiError(400, 'Invalid JSON body');
+    }
+  }
+
+  const itineraryHeaderXid =
+    body.itineraryHeaderXid !== undefined && body.itineraryHeaderXid !== null
+      ? Number(body.itineraryHeaderXid)
+      : NaN;
+
+  if (!Number.isInteger(itineraryHeaderXid) || itineraryHeaderXid <= 0) {
+    throw new ApiError(400, 'Invalid itineraryHeaderXid.');
+  }
+
+  const result = await itineraryService.cancelUserItinerary(
+    userId,
+    itineraryHeaderXid,
+  );
+
+  return {
+    statusCode: 200,
+    headers: {
+      'Content-Type': 'application/json',
+      'Access-Control-Allow-Origin': '*',
+    },
+    body: JSON.stringify({
+      success: true,
+      message: 'Itinerary cancelled successfully',
+      data: result,
+    }),
+  };
+});
diff --git a/src/modules/user/services/itinerary.service.ts b/src/modules/user/services/itinerary.service.ts
index 37b3821..a0e7b0d 100644
--- a/src/modules/user/services/itinerary.service.ts
+++ b/src/modules/user/services/itinerary.service.ts
@@ -2462,6 +2462,209 @@ export class ItineraryService {
     };
   }
 
+  async cancelUserItinerary(userXid: number, itineraryHeaderXid: number) {
+    return this.prisma.$transaction(async (tx) => {
+      const itinerary = await tx.itineraryHeader.findFirst({
+        where: {
+          id: itineraryHeaderXid,
+          ownerXid: userXid,
+          isActive: true,
+          deletedAt: null,
+        },
+        select: {
+          id: true,
+          itineraryNo: true,
+          title: true,
+          itineraryStatus: true,
+        },
+      });
+
+      if (!itinerary) {
+        throw new ApiError(
+          404,
+          'Active itinerary not found for the logged-in user.',
+        );
+      }
+
+      const itineraryActivityIds = (
+        await tx.itineraryActivities.findMany({
+          where: {
+            itineraryHeaderXid,
+            isActive: true,
+            deletedAt: null,
+          },
+          select: {
+            id: true,
+          },
+        })
+      ).map((item) => item.id);
+
+      const itineraryDetailIds = itineraryActivityIds.length
+        ? (
+            await tx.itineraryDetails.findMany({
+              where: {
+                itineraryActivityXid: {
+                  in: itineraryActivityIds,
+                },
+                isActive: true,
+                deletedAt: null,
+              },
+              select: {
+                id: true,
+              },
+            })
+          ).map((item) => item.id)
+        : [];
+
+      const itinerarySelectionIds = itineraryActivityIds.length
+        ? (
+            await tx.itineraryActivitySelection.findMany({
+              where: {
+                itineraryActivityXid: {
+                  in: itineraryActivityIds,
+                },
+                isActive: true,
+                deletedAt: null,
+              },
+              select: {
+                id: true,
+              },
+            })
+          ).map((item) => item.id)
+        : [];
+
+      if (itineraryDetailIds.length) {
+        await tx.itineraryDetailTaxes.updateMany({
+          where: {
+            itineraryDetailXid: {
+              in: itineraryDetailIds,
+            },
+            isActive: true,
+            deletedAt: null,
+          },
+          data: {
+            isActive: false,
+          },
+        });
+
+        await tx.itineraryDetails.updateMany({
+          where: {
+            id: {
+              in: itineraryDetailIds,
+            },
+            isActive: true,
+            deletedAt: null,
+          },
+          data: {
+            isActive: false,
+            itineraryStatus: 'cancelled',
+          },
+        });
+      }
+
+      if (itinerarySelectionIds.length) {
+        await tx.itineraryActivitySelectionFoodType.updateMany({
+          where: {
+            itineraryActivitySelectionXid: {
+              in: itinerarySelectionIds,
+            },
+            isActive: true,
+            deletedAt: null,
+          },
+          data: {
+            isActive: false,
+          },
+        });
+
+        await tx.itineraryActivitySelectionEquipment.updateMany({
+          where: {
+            itineraryActivitySelectionXid: {
+              in: itinerarySelectionIds,
+            },
+            isActive: true,
+            deletedAt: null,
+          },
+          data: {
+            isActive: false,
+          },
+        });
+
+        await tx.itineraryActivitySelection.updateMany({
+          where: {
+            id: {
+              in: itinerarySelectionIds,
+            },
+            isActive: true,
+            deletedAt: null,
+          },
+          data: {
+            isActive: false,
+          },
+        });
+      }
+
+      await tx.itineraryActivities.updateMany({
+        where: {
+          itineraryHeaderXid,
+          isActive: true,
+          deletedAt: null,
+        },
+        data: {
+          isActive: false,
+          bookingStatus: 'cancelled',
+        },
+      });
+
+      await tx.itineraryStartStopDetails.updateMany({
+        where: {
+          itineraryHeaderXid,
+          isActive: true,
+          deletedAt: null,
+        },
+        data: {
+          isActive: false,
+        },
+      });
+
+      await tx.itineraryMembers.updateMany({
+        where: {
+          itineraryHeaderXid,
+          isActive: true,
+          deletedAt: null,
+        },
+        data: {
+          isActive: false,
+          memberStatus: 'cancelled',
+        },
+      });
+
+      const cancelledItinerary = await tx.itineraryHeader.update({
+        where: {
+          id: itineraryHeaderXid,
+        },
+        data: {
+          isActive: false,
+          itineraryStatus: 'cancelled',
+        },
+        select: {
+          id: true,
+          itineraryNo: true,
+          title: true,
+          itineraryStatus: true,
+          isActive: true,
+        },
+      });
+
+      return {
+        itineraryHeaderXid: cancelledItinerary.id,
+        itineraryNo: cancelledItinerary.itineraryNo,
+        title: cancelledItinerary.title,
+        itineraryStatus: cancelledItinerary.itineraryStatus,
+        isActive: cancelledItinerary.isActive,
+      };
+    });
+  }
+
   async bookItineraryAfterPayment(
     tx: Prisma.TransactionClient,
     userXid: number,