Strasbourg's modest airport handles little beyond domestic and regional European hops, so no carrier flies nonstop from San Diego — every itinerary in business class from San Diego to Strasbourg routes through a major hub, typically Paris CDG, Amsterdam, or Frankfurt, before a short connecting flight or even a comfortable train transfer into Alsace. Delta and Air France codeshare extensively through their joint venture, making CDG the most seamless option: Delta's A350 business class or Air France's A330 with fully lie-flat seats gets you across the Atlantic, followed by a quick regional hop or a scenic 2-hour TGV ride straight into Strasbourg's city center, which many seasoned travelers now prefer over the connecting flight entirely. Lufthansa routes through Frankfurt, where its evolving Allegris business class cabin—when assigned to the transatlantic leg—offers some of the most private suites in the sky, though availability varies by aircraft, so it's worth checking your specific equipment before booking.
Having flown this corridor numerous times, I've found the CDG-to-Strasbourg rail connection, bookable in some cases as part of an Air France through-fare, to be the insider move: it clears you through immigration in Paris, avoids a second security screening, and drops you within walking distance of Strasbourg's Petite France district faster than waiting for a puddle-jumper connection. Seasonally, this route softens considerably outside summer and the Strasbourg Christmas Market rush—January through March and again in October and November tend to yield the most favorable business class availability, since leisure demand into Alsace is minimal and corporate travel from Southern California to eastern France is thin. Arriving into CDG, give yourself at least 90 minutes if connecting onward by air, as Terminal 2E's layout is not intuitive for first-time flyers.
Given the lack of nonstop competition and the reliance on connecting itineraries, fares on this route fluctuate more than typical transatlantic city pairs, making it a route where setting up automated fare tracking pays real dividends—letting you pounce the moment Delta, Air France, or Lufthansa release a favorable business class fare during those shoulder-season windows.
