NK Airline Code: Spirit Airlines IATA & ICAO
Spirit Airlines is stored in this dataset as IATA code NK and ICAO code NKS, based in United States. GDS segment lines print the IATA code before the flight number. Live routes, fares and baggage policies are not in this dataset.
Overview
NK is the IATA airline designator stored for Spirit Airlines. ICAO is NKS. Country of record: United States. On a cryptic GDS line the IATA code sits immediately before the flight number, for example NK 456. Agents should not confuse NK (two characters, sometimes a digit such as 6E) with NKS (three letters). This code page does not list routes, alliances, baggage rules, or fleet. Those facts are not in the dataset. Other United States carriers stored here: UA (United Airlines), AA (American Airlines), DL (Delta Air Lines), WN (Southwest Airlines), AS (Alaska Airlines), B6 (JetBlue). To decode a full itinerary that markets NK, paste the PNR into the parser.
How to use this page
- Find NK at the start of the flight line in the PNR.
- Paste the full itinerary into the PNR parser (or the GDS-specific parser if you know the host).
- Confirm the carrier name resolves to Spirit Airlines.
- Do not add baggage or meal claims that the PNR did not print.
Example
Example segment: 2 NK 456 H 26OCT 5 WLGAKL HK1 1945 2050 The parser should set marketing carrier NK (Spirit Airlines) and flight 456. Class H is a fare bucket, not proof of cabin without the booking-class tool.
FAQs
What does NK mean?
NK is the IATA airline code stored for Spirit Airlines.
What airline is NK?
Spirit Airlines, country of record United States.
What is the ICAO code for Spirit Airlines?
NKS.
Is NK the same as NKS?
No. Tickets and GDS segments use NK. Flight plans use NKS.
Where is Spirit Airlines based?
This dataset lists United States. Headquarters address is not stored.
How do I parse a NK itinerary?
Paste the GDS text into the PNR parser. Lines beginning with NK plus a flight number become segments.
Does this page show Spirit Airlines schedules?
No. Schedules are not in the dataset.
What baggage does NK allow?
Only what the pasted PNR prints (for example 2PC). Public policy pages are not stored here.
Are there other airlines from United States?
Stored peers: UA (United Airlines), AA (American Airlines), DL (Delta Air Lines), WN (Southwest Airlines), AS (Alaska Airlines), B6 (JetBlue).
Can NK include a number?
Some IATA codes include a digit (for example 6E). This catalog stores those codes when present.
How is Spirit Airlines shown in a PNR?
Usually as marketing carrier NK before the flight number, not the full name.
Where does this information come from?
The product airline table used by the parser. Last template update 17 Aug 2026. Unverified operational claims are omitted.