surface distance between fort collins and costa rica,central america?

Costa rica is a country that is several hundred square miles in area, so it is hard to give you an exact answer.

It is less than 3000 miles.

I have it for you! I went to http://www.mapcrow.info/ and typed in Fort Collins, USA and then typed in Los Chiles, CS
Los Chiles is a border city in Costa Rica bordering onto Nicaragua.

Los Chiles, CS -84.3333
10.4167
Fort Collins, US -105.0840
40.5853
Miles: 2437.57
Kilometers: 3922.78