Codeshare flight on an arrival card: match the number to the form, not a blanket rule

Separate the flight identity from the form's requested format

Privately put the latest itinerary beside the official arrival service. Record the marketing airline and number, the airline named after "operated by", its corresponding number if shown, the arrival airport and date, and the segment that reaches the destination. Ask the airline to map an unclear pair to the same actual service. A similar destination or departure time is not enough to establish that two numbers identify the same flight.

For a dated example of why this happens, Air India's announcement of 3 August 2026 describes its AI code being applied to Azerbaijan Airlines flights, with an Air India ticket and flight number on a partner-operated service. That illustrates this particular partnership. It does not tell any destination's arrival form which number to accept.

Read the airline selector and number box together

Do not copy every character from the ticket into a box marked numbers only. Equally, do not remove letters from a field that requests the complete flight identifier. Read the help beside both the airline selection and flight-number field. Distinguish a booking reference, ticket number and flight number before entering anything. Do not invent a missing number or select a different airline simply to make validation pass.

A concrete form example is the Visit Japan Web manual, version 3.17 dated 1 November 2026, under planned entry/return. It asks for an airline company selection and then a flight number using numerical values only. It separately describes a "Boarded flight number" using Latin letters and numbers when the airline choice is "ZZ: OTHER AIRLINE". These are that manual's distinct field formats, not permission to choose Other Airline for convenience.

The reviewed passage does not explicitly settle every codeshare marketing-versus-operating choice. Do not turn its numbers-only example into "always enter the operating flight" or "always copy the ticket number". Check the current service's specific help for your flight; if still unclear, ask the responsible authority.

For a connection, identify which journey detail the question asks for

List the route in order rather than using the first number printed on a multi-flight booking. Read whether the question concerns the flight arriving at the destination, the point of embarkation or another part of the journey. Match each answer to that exact label. Do not assume the origin of the whole holiday answers every departure-port field.

The same Visit Japan Web manual places a point-of-embarkation field alongside planned arrival and flight details. That does not make another destination's wording identical, or settle an unusual connection. If the route includes a changed flight, airport transfer or separate tickets, explain it to the authority when asking which entry belongs in the form. No transit exemption or admission outcome is confirmed by this checklist.

Ask a question that can actually resolve the two numbers

Use the destination service's official private help route. Give the form name, exact field label, available airline choices, arrival airport and date, and the two verified flight identifiers. Ask: "This is the same arriving flight, sold as [marketing identifier] and operated as [operating identifier]. Which airline choice and number should I enter in this field? If the required choice is absent, what supported route should I use?" Only state that the numbers map to the same service after the airline has confirmed it.

The airline can verify its flight mapping and current itinerary. The destination authority needs to resolve how its declaration should record that information. Keep the actual reply or case reference. A successful format check or saved draft does not establish that the flight detail is correct. Do not send a full passport, barcode or booking reference into a public forum to ask this question.

Recheck after a change, using the service's own correction route

Before submission, compare the selected airline, entered number, arrival date and airport with the final itinerary and official answer. After a rebooking, check whether the submitted details need updating and how that service supports the change. Do not promise that a new submission always replaces an earlier one, that an airport officer will fix it, or that every arrival card has the same edit window.

Give parents the current itinerary, explanation of the verified flight pair and the actual submission confirmation in the format their authority specifies. For help with the declaration itself, see the parent form-help checklist. If the issued boarding pass differs from the ticket, the separate boarding-pass guide covers that document comparison, not arrival-card acceptance.

Sources and what remains unconfirmed

Reviewed 14 November 2026. The dated sources above establish a specific codeshare example and a specific Japan form's field formats. Six official pages were reviewed, including the Thailand TDAC FAQ, JAL codeshare guide, ANA codeshare guide and ICA SG Arrival Card page. They were not used to establish a universal codeshare-number instruction. Exact acceptance for a particular destination form, airline pair, connection or correction remains unconfirmed here. This guide supplies no visa, boarding or entry clearance.