US ultra-low-cost carrier based in United States.
| IATA Code | G4 |
|---|---|
| ICAO Code | AAY |
| Callsign | ALLEGIANT |
| Country | United States |
| Category | US ultra-low-cost carrier |
When you see a segment line like this in a PNR, the airline code identifies Allegiant Air:
2 G4 587 Y 15JUL 2*JFKLHR HK1 800A 2000P
The two-letter code G4 at the start of the segment line is Allegiant Air's IATA code — every flight segment operated by Allegiant Air in a GDS PNR (Amadeus, Sabre, Galileo, or Worldspan) begins with this code, followed by the flight number.
Allegiant Air is a us ultra-low-cost carrier, based in United States. Its ICAO code, AAY, is used for air traffic control and flight planning, while its radio callsign is “ALLEGIANT”.
Like most airlines, Allegiant Air's fare classes follow the standard GDS booking-class letter system. See our complete booking class guide for what each letter (F, J, Y, and so on) typically means.
Allegiant Air's IATA code is G4. This two-letter code appears at the start of every flight segment operated by Allegiant Air in a GDS PNR.
Allegiant Air's ICAO code is AAY. The ICAO code is a separate, usually three-letter identifier used mainly in air traffic control and flight planning, distinct from the IATA code travel agents see in a PNR.
Paste the raw PNR text into PNRGenius and it will automatically detect Allegiant Air's segments (marked with the G4 code) and build a clean, client-ready itinerary in seconds.
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