NY couple get cheap flight in High Season to Belize for $240 roundtrip

Couple of backpackers visit TIKAL and stay at Falconview Backpackers Adventure Hostel in the backyard, courtesy of Ray and Silvia. They used PACZ TOURS for their TIKAL adventure and were highly pleased with the professionalism of the service. The couple from New York, came down on those cheap $240 round trip flights. Changing planes enroute in Dallas on American Airlines on the way down and also on the way back changing in Miami, for their 5 day Belizean adventure. They said the fare actually $150 usa round trip in December via American Airlines from New York to Belize.
This couple have also visited Trinidad, Explored New Zealand for a couple of months backpacking and done Costa Rica. This morning they caught the chicken bus to the coast to visit Caye Caulker and I told them be sure and take the HOL CHANNEL snorkeling trip. The best trip out of the Barrier Reef islands.
There names are Christine Terada from Hawaii originally living now in New York and Keith Schuricht from near Medisto, California, now living in New York city. They recommended for cheap flight specials to Belize to look at FlyerTalk.com
I was wondering the other day, why I cannot get a cheap fare out of Belize to the USA to do some shopping? I finally figured it is because in Belize we pay mostly in local Belizean Currency, and the airlines need foreign exchange and are reluctant to sell tickets locally in local currency which they cannot exchange into USA currency, or spend it much on operational costs.