Follow Twitter accounts like https://twitter.com/EUclaimcom which have up to date info about airlines affected by delays.
How can this help you? Well, If TUI is mentioned, for example, bids can be increased on the keyword for the next few days to capture as many valid delays as possible.
Get to know your email list subscribers (US only)
Good for segmentation
Frequently Asked Questions of TowerData Email Intelligence Services
Have a look at all the datafields you can (may) request
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