How to Enter ARNK Segment in Sabre PNR

ARNK Segment in Sabre: Learn how to efficiently enter ARNK segments in your Sabre PNR with this detailed guide. Mastering this skill is essential for travel professionals.

In the world of travel and reservation systems, mastering the art of entering ARNK (Arrival Unknown) segments in a Sabre Passenger Name Record (PNR) is crucial. It’s a skill that every travel professional should have in their toolkit. Whether you’re a travel agent, airline employee, or someone interested in the travel industry, this guide will help you navigate the process smoothly. Let’s embark on this journey to understand “How to Enter ARNK Segment in Sabre PNR.”

Enter ARNK Segment in Sabre PNR

ARNK Segment in Sabre: To begin our exploration, let’s delve into the core concept of entering ARNK segments in a Sabre PNR. This is where your journey to become a proficient Sabre user starts.

What is an ARNK Segment?

An ARNK segment, short for “Arrival Unknown,” is a vital component of a Passenger Name Record in the Sabre system. It represents a traveler’s intention to board a specific flight, even when their arrival details are unclear or yet to be determined.

Why are ARNK Segments Important?

ARNK segments play a crucial role in travel management, as they help in organizing and ensuring the smooth flow of travel information. They allow you to make reservations and keep track of passengers effectively, even when their arrival details are uncertain.

ARNK Segment

ARNK Segment in Sabre: An ARNK is used to provide continuity in Itinerary segments. If a passenger does not have any airline reservations within the same PNR for a specific city or arrival to that specific city is unknown, an ARNK is necessary to keep the itinerary in order.

Sample Itinerary Response:


Passenger has a flight reservation for SYD but the return flight back to SIN is from MEL. In this instance, SYD to MEL is surface whereby an ARNK is needed to keep the itinerary in order.

In absence of ARNK in itinerary, you would experience an error message upon every End Transaction. This error message is categorized as “Soft Error Response” where you are able still successfully End transaction with a second End Transaction Entry.

To insert ARNK after specific segment:


/1Function Identifier to insert after segment 1
AARNK qualifier

To Auto-Insert ARNK:


Auto-Insert ARNK function is not applicable for duplicate segments.


ARNK Segment in Sabre: Mastering the process of entering ARNK segments in a Sabre PNR is an invaluable skill for travel professionals. It ensures that you can efficiently manage passenger information, even when arrival details are unknown. By following the steps outlined in this guide, you’ll be well on your way to becoming an expert in this field.

Remember, the travel industry is constantly evolving, and staying updated with the latest tools and techniques, like ARNK segments in Sabre PNR, can give you a competitive edge. So, embrace this knowledge and excel in your travel endeavors!


Q: What if I don’t know the traveler’s arrival details at the time of booking?
A: No worries! You can enter an ARNK segment, indicating that the arrival details are unknown. You can update it later when the information becomes available.

Q: Is it essential to enter ARNK segments for all passengers?
A: It’s not mandatory, but it’s a good practice to enter ARNK segments when you’re uncertain about a passenger’s arrival details.

Q: Can I enter ARNK segments for international flights?
A: Yes, you can enter ARNK segments for both domestic and international flights in the Sabre PNR system.

Q: What’s the benefit of entering ARNK segments?
A: Entering ARNK segments ensures that you can make reservations and manage passenger details, even when arrival information is uncertain, making the travel process more efficient.

Q: How often should I update ARNK segments?
A: It’s advisable to update ARNK segments as soon as you have the traveler’s arrival information to maintain accurate records.

Q: Can I learn more about Sabre PNR systems and travel management?
A: Absolutely! There are numerous resources and courses available to enhance your knowledge of Sabre PNR systems and travel management.

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