2LNR Glossary

Codeshare

Codeshare flight

Flight operated by one airline but sold under another's flight number.

CPP

Cents per point

Valuation metric: (cash price x 100) / points required.

EQD

Elite qualifying dollars

Qualifying spend used to earn airline elite status.

EQM

Elite qualifying miles

Mileage used to qualify for airline elite status.

EQS

Elite qualifying segments

Flight segments counted toward airline elite status.

GDS

Global Distribution System

Centralized reservation systems (Sabre, Amadeus) connecting airlines, hotels, and travel agents.

GPU

Global Premier Upgrade

United upgrade certificate for international or long-haul routes.

GUC

Global Upgrade Certificate

Delta upgrade certificate for long-haul and international routes.

IRROPS

Irregular operations

Airline disruptions such as delays, cancellations, or gate changes.

MCT

Minimum connection time

Shortest allowed layover between flights at an airport.

NDC

New Distribution Capability

Modern airline distribution standard enabling richer content and direct airline connections.

Open Jaw

Open jaw itinerary

Itinerary where arrival airport differs from departure airport (e.g., fly into Paris, out of Rome).

PNR

Booking reference

Passenger Name Record code used to look up a reservation.

Portfolio Optimization

Portfolio optimization

Optimizing across all planned trips simultaneously rather than each trip independently.

Positioning Flight

Positioning flight

An additional flight taken to reach a departure point with better fares or availability.

PUC

PlusPoints upgrade

United PlusPoints upgrades used to request cabin upgrades.

RPU

Regional Premier Upgrade

United upgrade certificate for domestic or regional routes.

RUC

Regional Upgrade Certificate

Delta upgrade certificate for domestic or shorter routes.

SWU

Systemwide upgrade

American Airlines certificate that can upgrade any eligible route.

Ticket Chaining

Ticket chaining

Linking multiple tickets to create complex itineraries, often exploiting pricing advantages.

Travel Triangle

Optimization framework balancing Scope (destinations), Time (flexibility), and Resources (budget).