Here's a truth worth knowing before you book: there's no nonstop option for business class from Norfolk to Bristol, since ORF has no widebody service to the UK, which means the real decision isn't which cabin to fly but which US gateway to route through. After dozens of iterations on this itinerary, I've settled on Delta via JFK or Atlanta as the most reliable pairing, connecting onto Delta One suites (on the A330-900neo or A350) into Heathrow or, seasonally, direct services that terminal near Bristol's catchment area, followed by a rail or car transfer to BRS itself since Bristol Airport doesn't receive widebody long-haul metal. American Airlines routes similarly through Philadelphia or Charlotte, putting you in their Flagship Suite on the 777-300ER or A321XLR-adjacent widebodies, while United's preferred path runs through Newark or Washington Dulles into Polaris seats, with Dulles offering the smoothest overnight connection if you're transferring from ORF on a regional partner.
My insider tip, gleaned from years of working this corridor: build in at least a 2.5-hour connection window at your US hub, because ORF's regional jet schedules are thin and a missed onward widebody flight can cost you a full travel day — something that rarely shows up in fare search tools. Also, if your itinerary lands at Heathrow rather than direct to Bristol, use the Heathrow Express to Paddington and then a GWR train onward rather than fighting rush-hour traffic on the M4; it's faster and lets you stretch your legs after seven-plus hours in the air.
Seasonality matters enormously here — January, February, March, October, and November consistently produce the softest business class fares on this corridor, as the UK's summer leisure surge and December holiday demand both evaporate. Because pricing on this three-carrier route swings with connection routing and fuel surcharges rather than pure demand, I'd strongly recommend setting up automated fare alerts so you can pounce the moment Delta, American, or United release a favorable business class fare into this underserved corridor.