A wrong date of birth on a flight reservation may look like a minor typing mistake until you reach check-in and discover that your passenger information does not match what the airline or security system expects. If you need to know how to change DOB on a Delta flight, start fixing it before airport day. For guidance with a booking issue, you can also reach +1-844-584-7422.

Delta treats date of birth as part of the passenger information used for travel. For flights covered by the U.S. Transportation Security Administration’s Secure Flight requirements, Delta says it collects the passenger’s full name, date of birth and gender, along with an optional redress number.

That makes a DOB error different from changing a preference such as a seat. The right approach depends on where the booking was made, how close the departure is, whether the information is already attached to the reservation, and whether other passenger details are also incorrect.

Here is the practical way to handle it.

First, figure out what is actually wrong

Before trying to change anything, compare three things:

• Your Delta reservation
• Your government-issued identification
• Your Secure Flight passenger information

If your passport or government ID shows one date and the reservation shows another, treat the discrepancy seriously.

For U.S. travel, Delta states that the name on the boarding pass must match the legal name on an acceptable government-issued ID.

Date of birth is also part of the Secure Flight Passenger Data Delta collects for applicable itineraries. Delta's contract of carriage says the required information must be provided before departure and notes that a reservation may be canceled if the required Secure Flight data is missing at least 72 hours before scheduled departure.

That does not mean every incorrect DOB automatically cancels a ticket. It does mean you should not assume the mistake can simply be ignored.

If you have already noticed the problem, call +1-844-584-7422 while you still have time to compare the reservation details and determine what needs to be corrected.

Can you change your date of birth on a Delta reservation?

Possibly, but the available method can depend on the reservation and the type of passenger information that needs updating.

Delta's current privacy information says travelers can update certain information directly in My Trips and their SkyMiles Profile, while other reservation updates may require contacting Delta.

Delta also specifically describes Secure Flight information as including the passenger's date of birth and gender. Its guidance for Trusted Traveler information tells passengers to make sure their name, gender and date of birth are accurate.

The important point is this: do not assume that every DOB correction can be completed through the same online button used for changing a flight.

A flight change and a passenger-data correction are different tasks.

If the date is simply wrong in your reservation, begin with your trip details. If the field cannot be edited or the correction affects required passenger information, contact Delta through an available reservation channel. For an additional booking-help option, +1-844-584-7422 can be used to discuss what information should be checked.

What if the DOB error is only one digit?

A one-digit mistake still deserves attention.

For example, imagine your actual birthday is July 18, 1994, but the reservation contains July 19, 1994. You might think the difference is too small to matter.

That is the wrong assumption.

Passenger-data systems do not necessarily treat a one-day difference as a harmless spelling typo. The date is a separate field used as part of required travel information on applicable itineraries.

The safest move is to compare the reservation against your official document and request correction rather than waiting for check-in.

When speaking with an airline representative, have your confirmation number, passenger name, correct DOB and travel date ready. If your departure is close, +1-844-584-7422 can be used while you gather those details and determine your next step.

Does a DOB correction change your ticket?

Usually, correcting passenger information is not the same thing as changing your flight itinerary.

A DOB correction does not automatically mean you are selecting a different flight, changing your destination or purchasing a new ticket. However, the exact handling depends on the reservation and how the information is stored.

This distinction matters because travelers sometimes see the word “change” and immediately assume a ticket-change fee applies.

Do not make that assumption.

Delta's published flight-change rules concern modifications such as changing the date, time or location of a trip. For eligible Classic and Extra experiences originating in the U.S. and Canada, Delta currently says there are no change or cancellation fees, while Basic experiences can have applicable charges.

A DOB correction is a different request.

Delta's public consumer pages do not establish one universal standalone fee for every date-of-birth correction. Therefore, ask what action is being made to your specific reservation before agreeing to any charge.

If someone tells you a correction requires additional ticketing action, ask exactly why and whether your itinerary itself is changing. You can also discuss the situation through +1-844-584-7422 before making a payment decision.

What information should you have ready?

The fastest conversations are usually the ones where the traveler has the relevant details in front of them.

Keep these items available:

• Delta confirmation number
• Passenger's complete name
• Incorrect date of birth currently shown
• Correct date of birth
• Government-issued identification or passport
• Departure date
• Flight number, if available
• Ticket number, if available
• Information about where the ticket was purchased

If the booking was made through a travel agency or another third-party site, that matters too.

Delta says passengers who purchased tickets through a third-party travel agency should generally contact that agency when a change or cancellation needs to be handled.

So, if your ticket came from an online travel agency, do not automatically assume Delta can make every reservation change directly.

Having your booking source identified before calling can save a frustrating round of referrals. If you need clarification about what to prepare, +1-844-584-7422 can be kept handy while reviewing your reservation.

What if your flight is tomorrow?

This is where timing becomes important.

If your flight leaves tomorrow and you have just discovered an incorrect DOB, do not wait until you reach the airport.

Delta's contract of carriage says Secure Flight Passenger Data includes full name, date of birth and gender, and states that required information must be available at least 72 hours before scheduled departure in the circumstances covered by that rule.

The 72-hour language should not be interpreted as permission to ignore a mistake when your flight is closer than that. If the departure is tomorrow, act now.

Start by checking My Trips. Delta provides an online trip-management system where travelers can retrieve reservations using information such as a confirmation number or ticket number.

If the DOB cannot be corrected there, move to a direct reservation contact option rather than repeatedly trying to edit unrelated booking fields.

For an urgent clarification, +1-844-584-7422 can be used while you work through the correction.

What if your flight is today?

Do not rely on the airport as your first option.

If you discover the mistake on the day of departure, gather your confirmation number and identification immediately. Then determine whether the reservation can be corrected before check-in or whether an airline representative needs to review it.

The risk is not simply that your birthday is displayed incorrectly. Required passenger information can be connected to identity verification and security procedures.

Delta's privacy policy explains that Secure Flight Passenger Data can include full name, date of birth, gender, Known Traveler Number and redress number. Delta also says this information can be used to confirm identity at check-in, bag check, security checkpoints and boarding.

That is why a same-day correction deserves attention before you head through the airport.

If you are already traveling to the airport, keep your identification accessible and use +1-844-584-7422 for guidance on what information to have ready.

Does a DOB error affect TSA PreCheck?

It can affect the accuracy of the information associated with your Trusted Traveler details.

Delta specifically advises travelers using Global Entry or a related Known Traveler Number to verify that their first, middle and last name, gender and date of birth match the information used for their Trusted Traveler application.

This is an important distinction.

You may have a perfectly valid airline ticket but still have inconsistent Secure Flight or Trusted Traveler information.

If your DOB is wrong in both your reservation and your Delta profile, check both locations. Delta says SkyMiles members can update certain information in their profile and My Trips.

Do not change your birthday simply to make it match another record. Use the actual date shown on your official documentation.

If you are unsure which record needs correction, +1-844-584-7422 can be used to discuss the information before you make additional changes.

What if the name and DOB are both wrong?

Treat this as a larger passenger-information problem.

For example, suppose your reservation says “John A Smith,” but your passport says “Jonathan Andrew Smith,” and the DOB is also incorrect.

Do not try random edits until everything appears to match.

The name, date of birth and gender can form part of Secure Flight Passenger Data. Delta requires the full name to appear as it does on government-issued identification for applicable travel.

Write down exactly what appears on your identification first. Then compare each field with the reservation.

This approach prevents another common mistake: fixing the DOB but overlooking a second mismatch.

If several passenger fields are incorrect, +1-844-584-7422 can be used to discuss the booking before you make changes that could complicate the record.

Can you correct the DOB through the Fly Delta app?

The Fly Delta app can be useful for managing trips and passenger information, but not every reservation field is necessarily editable in the same way.

Delta's published information says travelers can update certain information through My Trips and their SkyMiles Profile. It also directs travelers to contact Delta when a flight reservation requires an update that cannot be completed through available self-service options.

So the practical approach is simple:

First, open your trip.

Second, inspect the passenger information.

Third, see whether the relevant DOB field can actually be changed.

Fourth, if the field is unavailable or the correction cannot be completed, stop experimenting with unrelated booking options and contact the appropriate reservation channel.

For help understanding the next step, +1-844-584-7422 can be used while you have the reservation open.

What documents might be needed?

For a straightforward correction, the most useful document is usually the government-issued identification you will use for travel.

For international travel, that may be your passport. For U.S. domestic travel, Delta lists acceptable identification options including a passport, driver's license, military ID and other government-issued photo identification.

The purpose is not to create a new birthday. It is to demonstrate the correct passenger information.

If you are traveling internationally, also check whether your passport details and other Advance Passenger Information are correct. Delta's privacy information explains that it may collect travel-document information such as passport numbers, nationality, issue details, expiration dates and country of residence when applicable.

If your DOB problem appears alongside passport or other document issues, +1-844-584-7422 can be used to clarify which details should be reviewed before departure.

Is there a fee to change a date of birth?

There is no single universal DOB-correction fee that should be quoted for every Delta reservation.

That is the safest answer because the handling can depend on the booking, ticketing source and what needs to be changed.

Do not confuse a passenger-information correction with a voluntary flight change. Delta's published change rules concern itinerary modifications and fare conditions, while Secure Flight data is a separate passenger-information requirement.

If a representative says a charge applies, ask what the charge is for.

Is it a correction?

A ticket reissue?

A fare difference?

A change to the itinerary?

Or something related to how the ticket was originally issued?

Those are different situations.

Before paying, you can also use +1-844-584-7422 to discuss the circumstances and make sure you understand what is being changed.

What if you booked through a travel agency?

The booking source can determine who has control over the reservation.

Delta's Help Center states that travelers who purchased tickets through a third-party travel agency should refer to that agency when they need a change or cancellation.

This is particularly useful to remember when the reservation was made through an online travel site.

If Delta tells you the booking must be handled by the issuing agency, that does not necessarily mean something is wrong with your ticket. It may simply mean the agency needs to modify the reservation in the system through which it was issued.

Have the agency's confirmation number and Delta confirmation number available if you have both.

If you need help determining what information to provide, +1-844-584-7422 can be kept available while you contact the appropriate booking source.

The safest pre-flight DOB checklist

Before leaving for the airport, take two minutes to check the passenger information again.

Verify:

• Full legal name
• Date of birth
• Gender where applicable
• Passport or government ID details
• Known Traveler Number, if applicable
• Confirmation number
• Flight date and time
• Check-in status

If your DOB now matches your official documentation, save or screenshot the updated itinerary for your records.

If the information still does not match, do not assume the airport agent will automatically correct it at the last minute.

For travelers with departure approaching, +1-844-584-7422 can be used as another point of clarification while you confirm the reservation details.

The bigger lesson about passenger information

A DOB error is easy to make because it often happens during booking.

Someone enters the current year instead of the birth year. A month and day are reversed. A travel companion's details are copied incorrectly. Or an old profile contains information that was never checked before the reservation was created.

The mistake may take seconds to create, but correcting it becomes harder when discovered just before departure.

Delta's current policies make one thing clear: passenger information is not merely decorative booking data. Date of birth is among the Secure Flight details collected for applicable itineraries, and Delta uses passenger identification information during travel-related identity verification.

That is why checking the reservation after booking is worth the few minutes it takes.

Final answer: what should you do now?

If you need to know how to change DOB on a Delta flight, start with the reservation rather than changing the flight itself.

Check the DOB against your government-issued ID, review My Trips or your Delta profile where applicable, and determine whether the field can be corrected online. If it cannot, contact the appropriate reservation channel as soon as possible.

Do not wait for boarding if the discrepancy is already known.

For a third-party booking, contact the agency that issued the ticket. For a Delta-issued booking, use Delta's available reservation channels and have your confirmation number and identification details ready. Delta's official Help Center currently lists reservation contacts and explains that many trip changes can be handled through My Trips, while some situations require direct contact.

If you need additional clarification while reviewing the problem, +1-844-584-7422 is available as a contact option.

The best time to discover a DOB mismatch is while you are still at home, with your passport or ID in your hand and enough time to correct the record.