Redigerer IATA-flyselskapskode (avsnitt)

===1===
<!-- when adding a IATA code to the list, please make sure that under the disambiguation page corresponding to the IATA code, the airline is listed! -->
* 1A – [[Amadeus (computer system)|Amadeus Global Travel Distribution]] (Spania)
* 1B – [[Abacus International]] (Singapore)
* 1C – [[Electronic Data Systems]] (Sveits)
* 1D – [[Radixx Solutions International]] (USA)
* 1E – [[Travelsky Technology]] (Kina)
* 1F – [[INFINI Travel Information]] (Japan)
* 1G – [[Galileo CRS|Galileo International]] (USA)
* 1H – [[Siren-Travel]] (Russland)
* 1I – [[Deutsche Rettungsflugwacht]] (Tyskland)
* 1I – [[Netjets Aviation]] (USA)
* 1I – [[Novair]] (Sverige)
* 1I – [[Pegasus Hava Tasimaciligi]] (Tyrkia)
* 1I – [[Sierra Nevada Airlines]] (USA)
* 1I – [[Sky Trek International Airlines]] (USA)
* 1J – [[Axess International]] (Japan)
* 1K – [[Southern Cross Distribution]] (Australia)
* 1K – [[Sutra (air company)|Sutra]] (USA)
* 1L – [[Open Skies]] (USA)
* 1M – [[JSC Transport Automated Information Systems (TAIS)]] (Russland)
* 1N – [[Navitaire]] (USA)
* 1P – [[WorldSpan]] (USA)
* 1Q – [[Sirena (airline)|Sirena]] (Russland)
* 1R – [[Hainan Phoenix Information Systems]] (Kina)
* 1S – [[Sabre (computer system)|Sabre]] (USA)
* 1T – [[1Time Airline]] (Sør-Afrika)
* 1U – [[Polyot Sirena]] (Russland)
* 1U – [[ITA Software]] (USA)
* 1V – [[Apollo Reservation System]], senere omdøpt [[Galileo CRS|Galileo International]] (USA)
* 1W – [[Wings Air]], datterselskap av [[Lion Air]] (Indonesia)
* 1Y – [[Electronic Data Systems]] (USA)
* 1Z – [[Sabre (computer system)|Sabre Pacific]] (Australia)