Who sells the ticket?
Who flies the aircraft?
Codeshare contract and London airport decision checks. This guide does not reproduce volatile fare rules; it shows exactly where to find and compare the evidence attached to a live offer.
Read the offer in the correct order.
- 01MARKETING CARRIER
The code printed first.
A BA-coded flight can still be operated by another airline. Treat the flight number as the commercial label, not final proof of the aircraft operator.
- 02OPERATING CARRIER
The airline after “operated by”.
This line is the decisive clue for the physical flight, onboard product and many day-of-travel processes.
- 03TICKETING CARRIER
The contract issuer.
The ticket number prefix and receipt identify the commercial record that changes and refunds may need to follow.
- 04FARE FAMILY
The rule set—not the cabin name.
Two economy offers can carry different baggage, seat, change and refund conditions. Compare the named fare family on the final payment screen.
Seven lines to capture before payment.
Save a screenshot or confirmation PDF that visibly includes each item. The record is useful if a seller later presents the itinerary differently.
01Full flight number and date□
02Exact “operated by” wording□
03Origin and destination airport codes□
04Fare family name□
05Checked and cabin baggage wording□
06Change and refund summary□
07Single-ticket or self-transfer disclosure□