Route note: this is actually Birmingham, Alabama (BHM) to Zurich, not the UK city—an important distinction given the carriers involved, all connecting through major US hubs rather than flying nonstop.
There's no nonstop service linking these two cities, so business class from Birmingham to Zurich always routes through a connecting hub, and the choice of that hub matters more than most travelers realize. Delta typically routes passengers through Atlanta or JFK before continuing on to Zurich, often in a Delta One suite on widebody aircraft with sliding doors on select routings—a meaningful upgrade in privacy compared to older business cabins. American Airlines tends to connect via Charlotte or Philadelphia, with transatlantic legs operated on its Flagship Business seats featuring reverse herringbone configuration. United, meanwhile, usually funnels connections through its Newark or Chicago hubs, offering Polaris business class with proper lie-flat seats and Saks Fifth Avenue-designed bedding on the long-haul segment. Total journey time from BHM, factoring in the connection, generally lands in the 12-15 hour range even though the transatlantic flight itself runs roughly 9.5 hours.
Having flown this corridor more times than I can count, my strongest advice is to prioritize the domestic connection quality as much as the transatlantic product itself—a tight connection through Charlotte or Philadelphia during winter storm season can undo the benefit of a great lie-flat seat if you're sprinting through security recheck. My insider tip: book the earliest viable connecting flight out of Birmingham, even if it means an inconvenient wake-up call, because afternoon rebooking options on this thin route are limited and mainline widebody business seats fill quickly once weather disrupts the Northeast hubs.
Seasonality favors deal-seekers in January, February, March, October, and November, when Swiss leisure demand softens and corporate travel between the Southeast and Central Europe dips enough to loosen premium cabin pricing. Because award and revenue fares on this connection fluctuate based on hub congestion and seasonal demand shifts, setting up automated fare alerts for the Birmingham-Zurich pairing is the smartest way to catch a business class window before it closes.
