Problem is sunquest usually only have a couple airplanes a week to the island, mostly on week-ends and very little during the week. There are a couple of options:
try
www.usair.com from Santo Domingo (sdq) to Buffalo, NY (buf). There is a semi special going on right now. When I checked for prices from Santo Domingo to Buffalo RT leaving in 1 week (13 April) the site gave me a price of $586US. From Buffalo airport you can take an airport shuttle
www.niagaraairbus.com This is a Canadian company that runs to the Toronto Airport from the Niagara Falls area and also goes to the Buffalo area.
option 2 is
www.travelspan.com they are the agents for NorthAmerican Airlines. (might be able to find someone at the Santo Domingo Airport). They offer what looks like good fares to JFK. check out hot deals - air only. From JFK you can take
www.jetblue.com to Buffalo for $50US. Or maybe Toronto for not too much. When you look at the NorthAmerican Airlines site they say they fly mid week also, travelspan only shows the week-end flights so you might have to email or call them.
REVIEW THE LUGGAGE RULES.... click policy then term and condictions. it is the last item ... strict requirements. It looks like they just redid their site, but the old site said ONLY hard sided luggage.
Jerry