Aviation Guides
In-depth explanations of airport codes, airline systems, and air travel fundamentals.
These guides cover the systems behind air travel that most passengers never think about: how airport codes are assigned and what they mean, why airlines use different codes than airports, how to decode a boarding pass, what goes into a flight plan, and how aviation infrastructure is organized around the world. Whether you're a frequent flyer looking to understand the codes on your ticket or an aviation enthusiast exploring the structure of global air travel, these articles are written to be practical and clear.
Apr 12, 2026
Understanding Airport Elevation and Why It Matters for Flying
High-altitude airports require more runway, more fuel, and different procedures. El Alto in Bolivia, at nearly 14,000 feet, is the world's highest commercial airport. Here is how elevation affects flight.
Mar 28, 2026
Regional Airports: The Connectors of the Aviation Network
Regional airports handle millions of passengers on short-haul domestic routes, feeding traffic to major hubs. Without them, large parts of the US, Canada, and Australia would be effectively unreachable by air.
Mar 22, 2026
How Airport Codes Are Used in Flight Planning
When pilots file a flight plan, they use ICAO codes, not IATA codes. Here is what a flight plan looks like and how airport codes fit into the larger system of aviation identifiers.
Mar 15, 2026
The World's Busiest Airports by Passenger Volume
Hartsfield-Jackson Atlanta held the top spot for decades, but Dubai and others are now challenging for the title. Here is how passenger traffic at the world's biggest airports has shifted.
Mar 9, 2026
Heliports: The Other Kind of Airport
Heliports are designated landing areas for helicopters and rotorcraft. From hospital rooftops to offshore oil platforms, these facilities serve critical roles that conventional airports cannot.
Feb 28, 2026
How Airlines Get Their Codes: IATA Airline Designators Explained
Every airline has a two-letter IATA designator that appears on flight numbers, tickets, and booking systems. Here is how they are assigned and what happens when airlines merge or rebrand.
Feb 22, 2026
Seaplane Bases: Aviation on the Water
Seaplane bases are among the most unusual aviation facilities in the world — airports without runways, operating from the surface of lakes, rivers, and ocean inlets. Here is how they work.
Feb 17, 2026
Major International Airports: What Makes an Airport "Large"?
The OurAirports classification system groups airports into large, medium, small, and specialty types. Here is what defines a large international airport and which ones top the rankings.
Feb 10, 2026
How to Read a Boarding Pass: Every Code Decoded
Boarding passes contain a dense layer of codes, dates, and numbers that most passengers ignore. This guide decodes every field — from the three-letter airport code to the BCBP barcode.
Feb 2, 2026
ICAO Codes Explained: The Four-Letter System Behind Every Flight Plan
ICAO codes are four-letter identifiers used by pilots, air traffic controllers, and airlines in flight operations. They cover every aerodrome on Earth — not just commercial airports.
Jan 27, 2026
What Is an IATA Airport Code and How Are They Assigned?
IATA codes are the three-letter identifiers printed on every boarding pass. Here is how the system works, who controls it, and why some codes look nothing like the city they serve.