rural carrier, $750 from Ohio would be a good price. Yes, sometimes in NE we catch a good price but GaKaye's $1200 seems very high because I assume they'd be leaving from Charlotte which we sometimes connect through from Providence.
I just put in some random dates (Nov) on AA from CLT to SXM and the current fare is between $600+ to around $800 for basic economy. Your connecting flight will often be cheaper than booking from CLT without any connection. It often depends on your origination (NE) determining the fare.
When you do not have the option of 3-4 airports and 3-4 carriers, you are stuck with the higher fares, connections and sometimes overnight travel.
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