Are there nonstop flights from Cancún (CUN) to Coxen Hole (RTB)?

No. The fastest connection is via Belize City, about 1h 45m of total flying time.

What is the fastest connection from Cancún (CUN) to Coxen Hole (RTB)?

via Belize City ≈ 1h 45m, via Guatemala City ≈ 2h 31m, via San Salvador ≈ 2h 32m (estimated flying time, excluding layovers).

Cancún International Airport (CUN) to Juan Manuel Gálvez International Airport (RTB)・527 km

No nonstop flights. The fastest connection is via Belize City (BZE), about 1h 45m of flying time (layover not included).

None.

3 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.