Airline Abbreviations and Flight Codes Explained: What Every Traveler Should Know

Last Updated: Tuesday May 05, 2026

If you’ve ever looked at your boarding pass or flight ticket and wondered what codes like “VN123” or “EK202” actually mean, you’re not alone.

These combinations of letters and numbers are part of a standardized system used across the global aviation industry.

1. What Are Airline Abbreviations?

Airline abbreviations are short codes—usually 2 or 3 characters—assigned by the International Air Transport Association (IATA). These codes are used worldwide to identify airlines quickly and consistently.

Each airline has its own unique IATA code, which appears on:

• Flight tickets
• Boarding passes
• Airport screens
• Baggage tags

Examples of Airline IATA Codes

Here are some well-known airlines and their abbreviations:

🇻🇳 Vietnam Airlines

• Vietnam Airlines – VN
• VietJet Air – VJ
• Bamboo Airways – QH
• Pacific Airlines – VN
• Vietravel Airlines – VU

Photo: Collected

🌍 International Airlines

• Cathay Pacific – CX (Hong Kong)
• Aeroflot – SU (Russia)
• AirAsia – AK (Malaysia)
• Air Busan – BX (South Korea)
• Air China – CA (China)
• Air France – AF (France)
• American Airlines – AA (USA)
• Asiana Airlines – OZ (South Korea)
• Bangkok Airways – PG (Thailand)
• British Airways – BA (UK)
• Cebu Pacific – 5J (Philippines)
• China Airlines – CI (Taiwan)
• Delta Air Lines – DL (USA)
• Emirates – EK (UAE)
• EVA Air – BR (Taiwan)
• KLM Royal Dutch Airlines – KL (Netherlands)
• Korean Air – KE (South Korea)
• Qantas – QF (Australia)
• Singapore Airlines – SQ (Singapore)
• Turkish Airlines – TK (Turkey)
• United Airlines – UA (USA)
• Lufthansa – LH (Germany)

These codes make it easy for airport systems and travelers to identify airlines quickly, no matter where they are in the world.

2. What Is a Flight Number?

A flight number is a combination of:

• The airline’s IATA code
• A set of digits

For example:

• VN123 → Vietnam Airlines
• VJ164 → VietJet Air
• EK202 → Emirates

This combination uniquely identifies a specific flight route and schedule.

3. How Flight Numbers Are Structured

Although each airline has its own system, there are some general patterns:

Domestic vs International Flights

• Lower numbers → often domestic or short-haul
• Higher numbers → often international or long-haul

Odd vs Even Numbers

Traditionally:

• Even numbers → flights heading East or North
• Odd numbers → flights heading West or South

4. What Is a Codeshare Flight?

You might notice some flights have 4-digit numbers, often starting with “3” or higher. These are often codeshare flights.

A codeshare flight means:

• One flight is operated by one airline
• But marketed under multiple airlines

For example:

• You book with Vietnam Airlines
• But the flight is operated by Korean Air

This allows airlines to expand routes without operating all flights themselves.

5. Why This Matters for Travelers

Understanding airline codes and flight numbers can help you:

• Confirm you’re at the correct gate
• Track your flight easily on airport screens
• Avoid confusion when multiple airlines share routes
• Understand your itinerary better

Airline abbreviations and flight numbers may look technical at first, but they follow a logical system designed to keep global aviation organized and efficient.

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