It's called code sharing. Delta and Virgin are partners (Delta owns 49% of Virgin Atlantic and effectively controls it). In code sharing, an airline sells seats on another carrier's flights under its own name. So Delta (operates by Virgin) means a Virgin aircraft, sold under a Delta flight number.

When you see that a Virgin flight is “operated by Delta,” it means that while you booked your ticket through Virgin Atlantic (VS), the actual flight will be flown using a Delta Air Lines (DL) aircraft, crew, and operational procedures.

This is a common practice in the airline industry known as a “codeshare agreement.” Here’s what it specifically means for you as a passenger:

Key Things to Know:

1. Marketing vs. Operating Carrier: Marketing Carrier (Virgin Atlantic): You bought the ticket from Virgin, their flight number (e.g., VS 4000) is on your itinerary, and their customer service handles your booking. Operating Carrier (Delta): The physical plane, pilots, flight attendants, and ground staff are all from Delta.

2. Check-in and Boarding: You will usually check in at Delta’s counters at the airport, as they are the operating airline. Your boarding pass will likely show both the Virgin flight number and the Delta flight number. The gate will be a Delta gate.

3. Aircraft and Service: You will fly on a Delta aircraft (e.g., an Airbus A330, Boeing 767, etc.), not a Virgin Atlantic plane. The in-flight experience (seats, entertainment, food, beverage service) will be Delta’s standard for that cabin class and route. You will not experience Virgin’s distinctive amenities like their famous Upper Class bar, their specific seat products, or their crew uniforms.

4. Frequent Flyer Miles and Benefits: Earning Miles