Strange lack of flight : why ?

Hi !

I have a question regarding a flight between Orlando (MCO) and New York (JFK/LGA) which is not constant and which does not exist on the date I am interested in.

In fact, I want to connect Orlando to New York on May 15, 2025 with the Delta company around 1 p.m. (I'm talking about Delta because it is a multi-city reservation LHR-MCO / MCO-NYC / JFK- LHR whose 1st and 3rd flights are operated by Virgin).
Currently, there is one flight which operates this route, it is flight DL2503. From November 6, there are 2 flights: DL2503 and DL2019. Then, suddenly, from May 7, 2025 (except May 13), these flights no longer exist, which really annoys me !

Do you have any idea about this lack of flights ? Should I wait ? Who should I write to for information ?

THANKS !

For the most accurate information, check Delta's website or contact their customer service. They can provide insights and advise on when those flights might be available again.