Use Case Diagram for Airline Reservation System | UML

Use Case Diagram for Airline Reservation System

The UML use case diagram is the behavioral diagram that summarizes activities done in the airline reservation system and its user details. It depicts the graphical representation of the system’s behavioral structure.

Additionally, the diagram consists of processes (use cases) and users or “actors”. It uses defined symbols to describe the overall workflow of the airline reservation system.

Project Overview

Name:Airline Reservation System Use Case Diagram in UML
Users:Airline Crews and Passengers
Tools Used:Any Diagram tools that provide use case diagram symbols.
Use Case Diagram for Airline Reservation System: Overview

What is a Use Case Diagram?

The use case diagram in software engineering shows the sample adaptive behavior of the airline reservation system. It encapsulates the project’s functionality by incorporating use cases, actors, and their interactions.

Airline Reservation System DFD Leve...
Airline Reservation System DFD Level 0, 1 & 2 | Best Data Flow Diagrams

Moreover, the diagram assists you in defining and organizing project requirements. This also provides a clear picture of the user and system relationships. Therefore, this diagram depicts the high-level functionality of a system including how the user interacts with it.

Importance of UML Use Case Diagram

To help the developers and enterprises in developing the system is the importance of the UML use case diagram. It includes the procedures from the viewpoint of users.

Furthermore, the diagram is the analysis methodology used to identify, clarify, and organize project needs. This diagram works best with other UML Diagrams for Airline Reservation System. Other UML diagrams include activity, class, sequence, deployment, and component diagrams.

Airline Reservation Use Case Diagram

The sample airline reservation system use case diagram includes actors, processes (use case), and their relationships.

General Use Case Diagram

This diagram presents the general use case of an airline reservation system. It shows the general processes or functions of the system that are based on the activities done by the users during reservations.

General Use Case Diagram for Online Airline Reservation System
General Use Case Diagram for Airline Reservation System

The general use case is the most common application of a use case diagram. It shows the system’s main components as well as the flow of information between them. This helps programmers to have the basis on what could be put into consideration in creating the airline reservation system.

Use Case Diagram for Airline Reservation using Include and Extend

The broken arrows are indications that the following diagrams connected to them are parts of a process. They could either be one of the indications which were the include or extend.

The “include” indication means that the following use case was compulsory to finish the task and the “extend” indication is otherwise.

Specific Use Cases of Online Airline Reservation System
UML Use Case Diagram for Airline Reservation System using Include and Extend

You can add more to this deigned diagram and it is up to you how will you create your diagram. But make sure to have precise information and consider the included use cases.

Downloadable Pdf File

How to draw a Use Case Diagram?

Time needed: 2 minutes.

Here’s the complete guide on how to draw a use case diagram for airline reservation system.

  • Step 1: Familiarize Use Case Diagram Symbols

    For beginners in the field of designing the diagram, you need first to familiarize the symbols to be used.

  • Step 2: Determine the targeted users

    The next step is to determine your targeted users. They will be the ones to use your project.

    You may ask the users about the typical activities done in airline system.

  • Step 3: Analyze the use cases included

    The gathered information from the users needs to be evaluated to know the general use cases.

    From the general use cases, you will see the sub-cases that are included. But, only the useful processes and circumstances related to the airline reservation system.

  • Step 4: Plot the Use Case Diagram

    To plot the diagram you will need the users, use cases, container (scope), and their indicators (association). You will base the flow of use cases on the evaluated information from the users.

    You need to place first the users involved.

    Then place the figured use cases included in doing the process.

    After that, you will trace the association of the use cases to know the interactions between the user/s and the system.

    Finally, put the container in the plotted diagram to separate the objects’ (users and system) scope.


The use case diagram is one of the methods that contribute to the airline reservation system design and development. It helps developers know the possible inputs and scenarios that the project should process and perform.

Furthermore, you will find out the needed processes and connect them to the other UML Diagrams. The diagram is also applicable in modeling the software’s use cases (processes). It also captures the system’s flow from one process to the next.


If you have inquiries or suggestions about the Use Case Diagram for Airline Reservation System, just leave us your comments below.

Leave a Comment