Can I correct a spelling mistake in a passenger's name after the flight has been booked?

Yes, often, but not always, and it depends on the airline. A small correction, such as one or two letters in a first name, is usually allowed if you ask soon after booking. Changing the ticket to a different person is not allowed at all, because the ticket belongs to the named passenger. Some airlines accept a genuine spelling fix at no cost within a short window after ticketing, some treat it as a name change and charge for it, and a few will only cancel the ticket and let you book again.

Whether your portal can do it on its own is a separate matter. Very few flight booking APIs allow a passenger name to be edited once the ticket has been issued. In most setups your staff raise the correction with the supplier or the airline using the booking reference, and the booking in your portal is updated after the airline confirms the change. So plan for this as something your team handles, not something the customer clicks.

The safest approach is to stop the mistake happening in the first place. Ask customers to enter the name exactly as printed on the passport, show a clear reminder at the passenger details step, and have your staff read names back before ticketing when they take a booking over the phone. The name on the ticket is what the airport will check against the travel document.

If you already have a booking with the wrong name, contact your supplier straight away rather than waiting, because the options usually get fewer and more expensive the closer it gets to departure.