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Now! 310 airports, 18 airlines, 5736 routes.

WHAT

GreenFlights.INFO is a Travel Planning tool to help you buy airline tickets on flights with reliable on-time performance records (and to avoid flights that are systemically delayed).

The Passenger Trip Delay IndexTM (PTDI) chart tells you which flights are O.K. and which flights are chronically late, cancelled, over-booked, diverted, or experience lost luggage. Don't chose these flights if you have to be somewhere on-time (e.g. connecting flight, meeting, wedding).

WHO

The GreenFlights.INFO website was created by students and faculty working at the Center for Air Transportation Systems Research (CATSR) at George Mason University (GMU).

These dedicated researchers have been studying the foundational mathematic concepts required to model and simulate complex, adaptive, networked, systems, such as the air transportation system. We emphasize holistic stochastic models of the aviation industry that include; economics, environmental impacts, rare-events, security considerations, innovation, and productivity.

The website was developed using internal funds only. Revenue from this website is held in a George Mason University Foundation Fund and is used to cover the costs of maintaining the website and for student research assistanceships. Tax-free donations to support this research can be made to this foundation. Please contact Executive Director CATSR, Dr. Lance Sherry (703-993-1711) for more information.

READING THE CHART

Green means Go! Flights that fall in the Green zone are reliable and arrive within 15 minutes of their scheduled arrival time.

Yellow means Caution! Flights that fall in the Yellow zone are consistently late (i.e. more than 15 minutes, but less than 2 hours). For a direct flight, bring a good book and bottle of water, and you will be fine. If you need to arrive before a specific time (e.g. a connecting flight), pick an alternate flight or have a back-up plan.

Red means Stop! Flights that fall in the Red zone are consistently very late. These flights are likely to be cancelled, experience diversions, experience over-booking, and/or experience lost luggage.

Keep in mind that flights that are systemically late can generate additional emissions and noise that affect the local air and water quality and contribute to global climate change.