Airline Reservation Code Dc1: Everything You Need to Know

Last Updated on July 24, 2026 by Daniel Globe

DK1 is an airline segment status used in some travel-agent and Global Distribution System displays. It does not universally mean that payment is pending or that a temporary fare hold will expire within a set number of hours. In an Amadeus-style booking workflow, DK commonly indicates confirmed space sold through an access link before the reservation transaction is fully completed.

What Does DK1 Mean?

DK1 is an agent-facing air-segment status. Its exact description can vary by reservation provider, but it generally relates to confirmed space obtained through a direct or linked booking connection.

Travelport’s official PNR status list describes DK as “Link book last seat.” In an Amadeus context, direct-access availability provides a real-time link to an airline’s reservation system so an agent can obtain current seat availability and sell space through that connection.

The code should therefore be read in two parts:

• DK describes the segment’s booking or access status.
• 1 indicates one passenger or one booked unit attached to that segment.

DK1 is not the same as a six-character booking reference, reservation locator, fare class, payment code, or ticket number.

How DK1 Works in a Booking

DK1 can appear while a travel agent is building or changing a Passenger Name Record, commonly called a PNR. A typical workflow looks like this:

1. The agent checks availability. The GDS communicates with the airline or reads the availability supplied through its access connection.
2. One seat is sold. The new segment may temporarily display DK1 to show confirmed space for one passenger through that access method.
3. The PNR is completed and saved. The agent adds the required passenger, contact, ticketing, and received-from information before ending the transaction.
4. The stored status may display as HK1. HK means the saved segment is holding confirmed for one passenger.

This process is about how the flight segment is recorded. It is not, by itself, a payment-processing sequence. A card can be authorized, declined, or not yet charged without changing the basic meaning of DK.

DK1 vs HK1: What’s the Difference?

The main difference is the point in the reservation workflow at which the status appears. DK can be associated with the access-sell transaction, while HK is the common stored status for a confirmed segment.

What Does the “1” in DK1 Mean?

The number after the two-letter status normally shows the number of passengers or units associated with that booking element. Therefore:

• DK1 normally applies to one passenger or one booked seat.
• DK2 normally applies to two passengers or two booked seats.
• HK1 means confirmed status for one passenger.
• HK3 means confirmed status for three passengers.

The number is not a quality rating, seat number, fare level, boarding group, or cabin class. Your assigned seat, such as 14A, appears separately.

When DK1 Changes to HK1

In an Amadeus-style workflow, DK1 may change to HK1 after the agent completes and saves the reservation transaction. The Thai-Amadeus Ticket Changer guide, for example, shows a newly rebooked flight in DK1 status and the segment later displaying HK1 after the record is saved and the ticketing workflow is completed.

The change should not be described as a direct result of payment approval. Payment, PNR storage, airline confirmation, fare pricing, and ticket issuance are related processes, but they are not the same event.

There is also no universal rule that DK1 expires after 48 to 72 hours. A ticketing deadline may be much shorter, longer, or absent, depending on the airline, fare, departure date, agency agreement, and booking channel. The itinerary or agent should provide the actual deadline.

Does DK1 Mean Your Flight Is Paid and Ticketed?

No. DK1 alone does not prove that the flight has been paid for or ticketed. To understand the booking correctly, separate these four items:

• Booking reference or PNR: A short code used to identify and retrieve the reservation.
• Segment status: A code such as DK1, HK1, HL1, or HX1 that describes a flight segment’s current state.
• Booking class: A letter such as Y, M, J, or F that relates to inventory and fare rules.
• Electronic-ticket number: A separate ticket identifier issued after successful ticketing.

For example, Emirates distinguishes its booking reference from its 13-character ticket number. Other airlines use a similar separation, although their ticket-number prefixes and display formats differ.

How to Verify Your Reservation

Follow these checks when DK1 or another unfamiliar status appears on your itinerary:

1. Open the airline’s manage-booking page. Enter the airline booking reference and passenger surname.
2. Confirm that every flight is present. Check the airline, flight number, airports, travel date, and local departure and arrival times.
3. Look for confirmed status. The consumer-facing page may say “Confirmed” instead of displaying HK1.
4. Find the electronic-ticket number. Check the airline receipt, agency invoice, confirmation email, or ticket-information section.
5. Check the ticketing deadline. Do not rely on a general 48-to-72-hour assumption.
6. Contact the issuer when anything is missing. The issuer is usually the airline or travel agency that collected payment and created the ticket.

Other Airline Segment Status Codes

The following are common examples, although the exact use can vary by GDS and airline:

You can review additional definitions in Travelport’s air-status documentation. When a status changes to HX, UC, UN, or another non-confirmed code, contact the airline or issuing agent promptly.

Common Questions About DK1

DK1 often causes confusion because travelers may see it on a cryptic agency itinerary without any explanation. Keep these points in mind:

• DK1 is generally associated with one confirmed segment obtained through a GDS access connection.
• It is not a standard abbreviation for “discount ticket.”
• It does not reveal whether a card payment is pending or complete.
• It does not contain a universal expiration period.
• It may change to HK1 when the booking transaction is completed and stored.
• Neither DK1 nor HK1 replaces the need to verify electronic-ticket issuance.

Most travelers do not need to perform a GDS command or manually change the code. Your airline or travel agency should finish the record and provide a clear confirmation or e-ticket receipt.

Frequently Asked Questions

What do airline booking codes mean?

“Booking code” can describe several different items. A booking reference identifies the reservation, a booking-class letter relates to fare inventory, a segment-status code such as DK or HK describes a flight segment, and a ticket number identifies an issued electronic ticket. Check which type of code appears on your document before interpreting it.

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What does +1 mean on an itinerary?

A +1 beside an arrival time normally means the flight arrives on the next calendar day based on local airport time. A +2 means arrival two calendar days after the listed departure date. It does not normally mean an additional passenger or flight segment.

Which airline should you stay away from?

DK1 cannot tell you whether an airline is safe or reliable. Review current information from aviation regulators instead of relying on a reservation code or isolated online review. One official resource is the EU Air Safety List, which identifies carriers subject to operating bans or restrictions in the European Union.

What does the airline reservation code mean?

An airline reservation code, commonly called a booking reference or record locator, is a short identifier used to retrieve your booking. DK1 is different because it is a segment-status code. Your booking can contain a record locator, several segment statuses, fare-class letters, and one or more ticket numbers.

Does DK1 guarantee that you can board the flight?

No. DK1 may indicate confirmed space during the reservation workflow, but boarding also depends on a valid ticket, correct passenger information, travel documents, check-in, and the segment remaining active. Verify the booking directly with the airline and confirm that an e-ticket was issued.

How long can a DK1 status remain in a booking?

There is no universal DK1 duration. In some workflows, it changes when the agent ends and saves the transaction. Any fare hold or ticketing deadline is controlled separately by the airline, fare rules, agency, and booking channel. Ask for the exact ticketing deadline rather than assuming a 48-to-72-hour period.

Sources

1. Travelport PNR Status Codes — definitions for DK, HK, HL, HN, KK, KL, HX, UC, UN, and other air-segment statuses.
2. Amadeus PoweredAir User Guide — how direct-access availability connects an agent to airline reservation inventory.
3. Thai-Amadeus Ticket Changer User Guide — booking examples showing DK1 during a rebooking workflow and HK1 in the completed record.
4. Emirates: Finding a Booking Reference or Ticket Number — distinction between a PNR and an electronic-ticket number.
5. Travelport PNR Date-Change Documentation — next-day arrival indicators used in flight itineraries.
6. European Commission EU Air Safety List — official information about airlines subject to operating bans or restrictions.

Conclusion

DK1 normally describes one flight segment sold through a GDS access connection. It should not be interpreted as a discount fare, a standard 48-to-72-hour payment hold, or proof that a ticket has been issued. DK1 may become HK1 after the reservation transaction is completed, but you should still verify the booking directly with the airline and confirm that each passenger has a valid electronic-ticket number.