# List of defunct airlines of Thailand

This is a list of defunct airlines of Thailand.
| Airline | IATA | ICAO | Callsign | Commenced operations | Ceased operations | Notes |
| Air Andaman | 2Y | ADW | Air Andaman | 2000 | 2004 | |
| Air Phoenix | | APN | THAI AIR PHOENIX | 2008 | 2009 | |
| Air Siam | VG | | | 1965 | 1977 | |
| Angel Air | 8G | NGE | ANGEL AIR | 1998 | 2003 | |
| Asia Atlantic Airlines | HB | AAQ | ASIA ATLANTIC | 2013 | 2018 | Rebranded as Air Thailand |
| Asia Pacific Airlines | | | | 2013 | 2013 | Rebranded as Asia Atlantic Airlines |
| Asian Air | DM | DEX | ASIAN AIR | 2013 | 2016 | |
| Bira Air Transport | | | | 1969 | 1974 | |
| Business Air | 8B | BCC | THAI BIZ | 2009 | 2015 | Rebranded as Intira Airlines |
| City Airways | E8 | GTA | CITY AIRWAYS | 2011 | 2016 | |
| Crystal Thai Airlines | YL | KPS | CRYSTAL THAI | 2010 | 2012 | Rebranded as U Airlines |
| Flyhy Cargo Airlines | W3 | FYH | | 2004 | 2005 | |
| Happy Air | | HPY | HAPPY TRAVEL | 2009 | 2015 | |
| Intira Airlines | 8B | BCC | THAI BIZ | 2015 | 2015 | Not launched |
| Jetgo International | | JIC | | 2004 | 2007 | |
| Jet Asia Airways | JF | JAA | JET ASIA | 2011 | 2020 | |
| Kan Air | K8 | KND | KANNITHI AIR | 2010 | 2017 | |
| Legacy Air | L4 | LGC | LEGACY AIR | 2009 | | |
| New Gen Airways | E3 | VGO | VIRGO | 2012 | 2019 | |
| NokScoot | NCT | XW | BIG BIRD | 2013 | 2020 | Shut down due to the COVID-19 pandemic |
| One-Two-GO Airlines | OG;E2 | OTG | THAI EXPRESS | 2005 | 2010 | Integrated into Orient Thai Airlines |
| Orient Express Air | OX | OEA | | 1995 | 1997 | Merged into Orient Thai Airlines |
| Orient Thai Airlines | OX | OEA | ORIENT THAI | 1995 | 2018 | Went bankrupt |
| Pacific Overseas Airlines | | | | 1947 | 1951 | Merged with Siamese Airways to form Thai Airways Company |
| PBair | 9Q | PBA | PEEBEE AIR | 1997 | 2009 | |
| P.C. Air | GT | PCA | PIYO AIR | 2010 | 2012 | |
| Phetchabun Airlines | | | | 2005 | 2005 | |
| Princess Airlines | | | | 1996 | 1996 | |
| R Airlines | RK | RCT | GREEN SKY | 2012 | 2018 | |
| SGA Airlines | 5E | SGN | SIAM | 2002 | 2014 | |
| Siam Air | O8 | SQM | GOLDEN FIN | 2014 | 2017 | |
| Siamjet Airlines | | SCJ | SIAM JET | 2012 | 2012 | Not launched |
| Siamese Airways | | | | 1947 | 1951 | Merged with Pacific Overseas Airlines to form Thai Airways Company |
| Sky Eyes Airways | I6 | SEQ | | 1995 | 2008 | |
| SkyStar Airways | XT | SKT | SKY YOU | 2005 | 2009 | |
| Solar Air | | SRB | SOLAR THAI | 2004 | 2010 | |
| Sunny Airways | 2S | SUW | SUNNY | 2011 | 2012 | |
| Thai Air Cargo | T2 | TCG | THAI CARGO | 2005 | 2006 | |
| Thai Airways Company | TH | THA | THAI AIR | 1951 | 1988 | Merged into Thai Airways International |
| Thai Global Air | YH | THG | | 2006 | 2008 | |
| Thai Pacific Airlines | 3P | TPV | THAI PACIFIC | 2003 | 2004 | |
| Thai Regional Airlines | RW | TRB | THAI REGIONAL | 2012 | 2013 | |
| Thai Sky Airlines | 9I | LLR | THAI SKY AIR | 2004 | 2007 | |
| Thai Smile | THD | WE | THAI SMILE | 2012 | 2023 | Integrated into Thai Airways International |
| Thai Tiger Airways | | | | 2010 | 2011 | Failed venture |
| ThaiJet | | THJ | THAI JET | 2003 | 2004 | |
| Trans Asiatic Airlines | | | | 1947 | 1950 | |
| U Airlines | YL | ULG | UNICORN | 2012 | 2014 | |
| Wisdom Airways | | GBJ | | 2017 | 2019 | |