United's service to Chicago is running from the 26th May to the 6th September, not the 11th September as previously thought.
It will however, be running at daily for that entire period, as opposed to previous years when it only ran at daily from the 15th June-16th August and was at 5pw for the rest of the period.
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Delta's JFK service now ends the 15th of October, 2 weeks cut off compared to this year.