Southwest Florida isn't a market you'd expect to yield elegant routings into the Balkans, yet after years of piecing together this itinerary, I've found that business class from Fort Myers to Zagreb rewards patience and smart routing far more than any nonstop fantasy ever could. There is no direct service, and there won't be — RSW simply doesn't generate the transatlantic volume to justify it, so every itinerary funnels through a major hub. The most reliable path pairs Delta out of Fort Myers to Atlanta or JFK, connecting onto a transatlantic partner, or alternatively routing through Lufthansa's Frankfurt or Munich hubs, both of which offer efficient onward connections to Zagreb on Lufthansa's own regional metal or Croatia Airlines (OU) equipment. Total journey time typically runs 13-16 hours including connections, well beyond the roughly 10.5-hour transatlantic flying segment itself.
My preferred build is Delta to Amsterdam or Paris, then a codeshare or partner hop, but if Lufthansa fares align, flying their long-haul cabin — increasingly outfitted with the new Allegris business suite on select 787 and A350 routes — into Frankfurt makes for a genuinely comfortable crossing before the short Croatia Airlines connector completes the journey. Croatia Airlines itself flies primarily narrow-body equipment on the Frankfurt-Zagreb and Munich-Zagreb sectors, so don't expect lie-flat seating on that final leg; treat it as a regional shuttle after your long-haul comfort. One insider tip that's saved me hours of stress: book the Frankfurt connection with a minimum 90-minute buffer, since non-Schengen arrivals often require a fresh security screening before reaching the Schengen gates where Croatia Airlines departs.
January through March and again in October and November consistently produce the softest fares on this corridor, as Croatian leisure demand collapses outside summer and Central European business travel dips around the holidays. I've watched fares swing significantly week to week even in these shoulder windows, which is exactly why setting up automated fare alerts for this specific Fort Myers-Zagreb business class routing, rather than checking manually, is the smartest way to catch the rare favorable pricing before it disappears.
