There's no nonstop path between Indianapolis and Birmingham, England, and after a decade of routing myself through this corridor, I've come to accept that the connection is where the real decision-making happens. Business class from Indianapolis to Birmingham always routes through a major East Coast or European gateway, since neither Delta, American, nor United operates widebody metal out of IND. The practical truth: you're flying a domestic first-class or regional business cabin from Indianapolis to a hub, then transferring into genuine long-haul business product for the transatlantic leg to Birmingham (BHX), since there's no direct US-UK service into that airport either — most itineraries actually terminate at London Heathrow or Gatwick, with a final short hop or train up to Birmingham.
My preferred build is Delta out of Indianapolis connecting through JFK or Boston, then onto Delta One on the A330 or A350, where the suite doors and adjustable lighting make that overnight crossing genuinely restorative. American routes you through Charlotte or Philadelphia into their Flagship Business cabin on the 777 or A330, with lie-flat Cirrus seating that's solid if less private than Delta's suites. United typically funnels Indianapolis traffic through Chicago O'Hare or Newark, then into Polaris on the 767 or 787 — I've found the Polaris lounge in Newark's Terminal C worth timing a longer layover around if your itinerary allows it, since it's one of United's better ground experiences and helps you land into the UK already adjusted.
Given the lack of nonstop service, my insider tip is to book your domestic connector with enough buffer — 90 minutes minimum — to clear security again at hub airports like JFK or Newark, since misconnects here are common and rebooking into business inventory last-minute is brutal. Aim for January, February, March, October, or November departures, when transatlantic business fares soften considerably outside peak summer and holiday travel. Because pricing on this three-airline route shifts often with connection routing and seasonality, setting up fare alerts is the smartest way to catch the right window before it closes.
