AA's flight 978 to MIA now is operated by 757 and it goes to NYC after MIA, so they offer now 2 daily flights POP NYC, one is NONSTOP and another is via MIA to LGA.
AA *978 SDQ LGA 757 1505 2238 1234567 VIA MIAMI
AA 1798 SDQ JFK AB6 1645 2020 1234567
AA *978 SDQ LGA 757 1505 2238 1234567 VIA MIAMI
AA 1798 SDQ JFK AB6 1645 2020 1234567