**OpenFlights**

# OpenFlights

## About this network

These are flights collected by the OpenFlights.org project. Each node is an airport, and a directed edge represents one flight by one airline. A flight in this dataset is defined as a normally regularly occuring flight identified by its flight number (e.g., AF331), not individual flights (e.g., AF331 on June 14 2015). In the network, multiple edges may connect the same nodes, because multiple airlines may connect the same airports, and a single airline may have multiple flights connecting the same airports (usually, at different time of days). Thus, the multiplicity of an edge gives a rough estimate of the traffic between two airports. The dataset in the version available contains at least one loop: A flight by Trigana Air Service (IATA code IL) from and to Iskandar Airport (IATA code PKN) in Indonesia. We do not know whether such entries are errors, or whether they represent legitimate flights, used e.g. for sightseeing.

## Network info

Code | OF |

Category | ⬤ Infrastructure |

Data source | http://www.openflights.org/data.html |

Vertex type | Airport |

Edge type | Flight |

Format | Directed |

Edge weights | Multiple unweighted |

Metadata | Loop |

Size | 3,425 vertices (airports) |

Volume | 67,663 edges (flights) |

Unique volume | 37,595 edges (flights) |

Average degree (overall) | 39.511 edges / vertex |

Fill | 0.0032049 edges / vertex^{2} |

Maximum degree | 1,826 edges |

Reciprocity | 97.6% |

Size of LCC | 3,397 vertices |

Size of LSCC | 3,354 vertices |

Wedge count | 1,221,697 |

Claw count | 383,135,844 |

Triangle count | 101,117 |

Square count | 4,243,727 |

4-tour count | 38,875,116 |

Power law exponent (estimated) with d_{min} | 1.7410 (d_{min} = 2) |

Gini coefficient | 78.1% |

Relative edge distribution entropy | 86.4% |

Assortativity | –0.0064555 |

Clustering coefficient | 24.8% |

Diameter | 13 edges |

90-percentile effective diameter | 5.40 edges |

Mean shortest path length | 4.19 edges |

Spectral norm | 353.41 |

Algebraic connectivity | 0.047360 |

## Downloads

TSV file: | openflights.tar.bz2 (154.58 KiB) |