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Where can I find historical data on flights, specifically Delta international flights?

I need to find out about cancellations, diversions and any other flight data pertaining on particular route at a given time. This source has to be official and stand up to legal scrutiny.

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up vote 13 down vote accepted

The two best sources for this type of data are FlightAware and Flight Stats. Although these sites both get data from the FAA, I don't know that either would be considered "official".

The nearest to official source would be the FAA data available at however this data is always several months behind (eg, they currently have up to November 2011), and not as easy to search for specific flights as either of the above two sites.

For (at least) Flight Stats you'll need to create an account to look at historic data, however it's free to do so.

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I came here to say flightstats, def agree with @Doc's answer above. – Mark Mayo Jan 22 '12 at 11:22
Thanks, I got the info I needed after signing up for a free account. – Miles Leacy Jan 22 '12 at 13:28

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