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Beginner Guide

What Does 6E 2345 Mean? Flight Numbers Decoded

Updated June 25, 2026 | 3 min read

You see "6E 2345" on your ticket and wonder — what does that even mean? Every flight number has a secret language. Let's decode it.

Indian Airline Codes

CodeAirlineFun Fact
6EIndiGoNamed after "sixth sense" of good service
AIAir IndiaIndia's flag carrier since 1946
SGSpiceJet"SG" = SpiceJet Group
QPAkasa AirIndia's newest airline (2022)
IXAir India ExpressLow-cost international arm

What the Number Means

  • 🔢 Low numbers (001-999): Usually flagship/international routes
  • 🔢 High numbers (2000+): Domestic routes
  • 🔢 Odd = outbound, Even = return — AI 101 goes DEL→BOM, AI 102 returns
  • 🔄 Codeshare: Same physical plane can have AI 101 AND SQ 4101 — different airlines selling same seats
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