Zakynthos's small seaside airport doesn't accommodate widebody aircraft, which means there's no nonstop option — every itinerary in business class from Chicago to Zakynthos requires a connection through a major European hub, most sensibly London, Frankfurt, Munich, or Athens. Having routed through all three approaches over the years, my preference leans toward British Airways via Heathrow, where the Club Suite on the transatlantic 777 or A350 leg delivers a genuine door and direct aisle access, a rarity on this specific corridor. Lufthansa's Frankfurt or Munich connection is compelling too, especially now that select ORD departures are being upgraded to the Allegris cabin, though availability on any given day still varies, so it's worth checking aircraft type before booking. Aegean Airlines, as the Star Alliance partner handling the final short hop from Athens to Zakynthos, doesn't operate long-haul business class product, but its short-haul business cabin is a comfortable, well-catered finish to a long journey.
The real strategic decision is where you want your layover pain to happen. I favor routing through Athens with Aegean for the last leg, since it lets you clear immigration in the EU's outer border at a hub you likely know well, then take a short, scenic final flight into Zakynthos with sweeping Ionian views on final approach — request a left-side window seat for that. If you're connecting through Munich or Frankfurt on Lufthansa, build in at least a two-hour buffer, as those hubs get congested with connecting European traffic in peak summer months. An insider tip few travelers know: Aegean occasionally operates larger aircraft into Zakynthos during the May and September shoulder seasons when tour charter demand dips, which can loosen award and upgrade availability on that final segment.
Shoulder season — April, May, September, and into October — remains the sweet spot for this route, both for fares and for milder Ionian weather without peak Greek-island crowds. Because pricing and premium award space fluctuate constantly across these three carriers and their connecting options, setting up fare alerts for this specific city pair is the smartest way to catch a favorable opening before it disappears.
