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find a flight to Costa Rica. The total flight duration from Boston, MA to Costa Rica is 5 hours, 13 minutes. This assumes an average flight speed for a commercial airliner of 500 mph, which is equivalent to 805 km/h or 434 knots. It also adds an extra 30 minutes for take-off and landing.
Submit. Â· just now. Report Abuse. It takes about 3 hours from Boston to Miami and about 2 and 1/2 hours from Miami to San Jose, JosÃ© Costa rica total is 5 and/1 2, hours if you need to make stopovers or switch planes that will delay you a couple more. hours