Which airlines are currently covered?

American Airlines, Delta, United, Air Canada, and British Airways — each verified directly against that carrier's own agent-facing fare documentation, not guessed from a generic booking-class chart.

Why only these five airlines?

Booking class letters mean different things on different airlines — the same letter can be a premium fare on one carrier and a Basic Economy fare on another. Rather than guess, only airlines with a directly verified source are flagged; an unlisted airline simply gets no flag instead of a potentially wrong one.

What should I do when I see a flag?

Treat it as a prompt to confirm the exact fare rules in your GDS before ticketing — the flag tells you a fare is likely restrictive, but the authoritative source is always your GDS.

Basic Economy Fare Flags: Know Before You Book

Booking class letters look interchangeable if you're not deep into a specific airline's fare structure — Y, B, H, Q, they're all just letters in the PNR. But on a growing number of carriers, one specific letter means the client is being booked into Basic Economy: no free checked bag, no advance seat selection, boards last, and changes or refunds may be restricted or unavailable entirely. Nobody wants to find that out from an unhappy client at the airport.

What Gets Flagged

PNRGenius checks the booking class on every segment against a small, deliberately conservative table of verified Basic Economy identifiers:

Airline	Basic Economy Class(es)	Source
American Airlines	B	saleslink.aa.com Basic Economy Reference Guide
Delta Air Lines	E	pro.delta.com agency portal
United Airlines	N, G	United's published Basic Economy fare identifiers
Air Canada	L	Air Canada Branded Fares GDS User Guide (Tango bundle)
British Airways	Q, O, G	BA's lowest, most-restrictive Economy tier

When a segment's airline and booking class match this table, the converted itinerary shows a clear flag with the specific restrictions that fare tier typically carries — so it's visible the moment you convert the PNR, not something you have to notice buried in a booking class letter.

Why Only Five Airlines

This is intentional. Booking class codes aren't standardized across carriers — the same letter can mean a premium fare on one airline and the cheapest, most restrictive fare on another. Guessing at a general table risks flagging fares that aren't actually Basic Economy, or worse, missing ones that are. Every airline in this table was checked directly against that carrier's own agent-facing fare documentation. Airlines not yet verified simply get no flag rather than an unreliable one — silence is safer than a wrong flag.

💡 The scenario this is built for

A client books what looks like a normal economy fare, only to discover at check-in that seat selection wasn't included and their bag needs to be paid for separately. A flag at the point of booking — while there's still time to offer an upgrade to a standard fare or simply set expectations — is a much better conversation to have than the one that happens after the fact.

What This Isn't

It's not a live fare rule lookup, and it doesn't cover every airline yet. Treat a flag as a prompt to confirm exact terms in your GDS before ticketing, and treat the absence of a flag on an unlisted airline as "not checked" rather than "definitely not Basic Economy."

Check Your Next Fare for Basic Economy Restrictions

Convert a PNR and see fare flags appear automatically wherever a restrictive booking class is detected — free, no setup.

Convert a PNR →