You have a flight reservation ready, then notice the name looks different from the one on your passport. Perhaps your second given name has disappeared. Perhaps two surnames have been pushed together. Or perhaps the booking shows the name you use every day, not the one printed in your travel document.
Start with your passport, not your email signature. The reservation should identify the same person who will present it. But airline booking systems do not all display names in the same way, and a missing space is very different from the wrong family name.
The first name and surname are the starting point
The most useful check is also the simplest: does the reservation contain the traveler's correct given name and family name, in the correct fields?
A nickname is not a safe substitute. If your passport says Elizabeth, booking as Liz creates a difference that is easy to avoid. The same goes for entering a partner's surname because that is the name used on a shared email account. The person paying for the booking and the person travelling are not necessarily the same.
Look especially carefully at the family-name field. That is often the name requested alongside the booking reference on an airline's Manage Booking page. If the family name is in the wrong field, even a correctly typed booking reference can be difficult to retrieve.
For an explanation of what that reference actually identifies, see how a PNR works.
Middle names: the answer is not identical across airlines
There is no useful universal rule that every airline requires every middle name, or that none of them does.
Ryanair says middle names are not required for its flight bookings. Turkish Airlines tells passengers to enter the first and middle names together in its given-name field. Those are two published instructions from two real airlines, and they are not worded the same way.
If you are entering a name for a particular airline, use that airline's instructions and the fields actually provided. Do not add initials or rearrange names because an unrelated website said it was always acceptable. When a reservation has already been made, compare what appears on it with the information entered rather than assuming a missing middle name means the whole booking is wrong.
Two surnames are not a typo
For many Spanish-speaking travelers, two apellidos are a normal part of the full name. A booking form built around a single “last name” box can make that look more complicated than it is.
Start with the surname or surnames shown in the passport. Then follow the airline's field instructions. Do not quietly move a second surname into the first-name box just to make the form look balanced. A system may later combine the family names into a single string; that display alone does not mean one surname was lost.
This is also why it helps to distinguish what you typed from how the airline displays it. The two may look different while referring to the same passenger.
If two people are travelling together, they can have different surnames and still share a reservation. The article on two passengers using one PNR explains that separate question.
Accents, hyphens and names without spaces
Airline systems often simplify punctuation and spacing. You may see GARCIA where your passport says García, or JOHNADAM where you entered John Adam.
A booking display may join given names or remove accents and punctuation. Turkish Airlines publishes examples of how to enter names with hyphens and multiple components; use the instructions for the carrier you are booking with.
A dropped accent or joined space deserves a quick comparison, not instant panic. A surname spelled with different letters, a first and last name swapped, or a booking made under a completely different name is another matter. Those are the discrepancies to raise with the issuer before travel.
Married names and recently changed passports
The name used socially, the name on an older reservation and the name on a current passport are not always identical. If your documents have changed after a marriage or another name change, compare the booking with the passport you will actually use for the trip.
Do not assume that carrying an explanation will automatically fix the record. Ask the airline or issuing agent how it handles corrections for that booking. Some carriers distinguish minor corrections from full name changes, and fees or deadlines can differ. For example, Ryanair publishes separate rules for small corrections and full changes; they are not a general policy for every airline.
The easiest time to resolve a discrepancy is before the travel day, when there is room to check the passenger record rather than guessing at the counter.
If the reservation will not open online
Many airline websites ask for two things: a booking reference and a surname. If the search fails, check the family name exactly as the reservation displays it. Then confirm you are using the correct airline's reference.
Do not keep changing the spelling at random. Compare the original booking, the passenger fields and the airline's own name-format guidance. If they disagree materially, ask the issuer to check the record. The article on why a booking may not appear on an airline website walks through the other common causes.
A missing accent or space is different from a booking made for the wrong person. Compare the reservation with your passport and check the airline’s own name-entry guidance before requesting a correction.