Here is a list of all the Airlines I have flown with. Scroll down for logos.
Aegean Airlines - A3 (Greece). Definitely one of my favorite European carriers.
Novair - 1I (Sweden). My very first flight was with Novair, on a Lockheed L1011. I loved every moment of it.
Olympic Airlines - OA (Greece) - Defunct.
Olympic Air - OA (Greece). A huge improvement to its predecessor. I have only flown with them on domestic segments.
Swissair - SR (Switzerland) - Defunct. My first non-chartered flight was on SR.
Swiss International Airlines - LX (Switzerland).
Crossair - LX (Switzerland) - Renamed. I flew with them a couple of times before they became Swiss International Airlines after the closure of Swissair.
KLM - KL (Netherlands).
CityJet - WX (Ireland/France).
Transavia - HV (Netherlands).
Augsburg Airways - IQ (Germany) - Defunct.
Lufthansa - LH (Germany).
Air Scotland - GRE (ICAO) (Scotland/Greece) - Defunct.
Air France - AF (France).
EasyJet - U2 (United Kingdom).
Ryanair - FR (Ireland).
FlyBE - BE (United Kingdom).
British Airways - BA (United Kingdom).
Czech Airlines - OK (Czech Republic).
Alitalia - AZ (Italy).
WizzAir - W6 (Hungary).
American Airlines - AA (USA).
United Airlines - UA (USA) - Merged with American Airlines
US Airways - US (USA).
Delta - DL (USA).
Asiana - OZ (S.Korea). One of the best airlines I have ever flown with. Stellar on-board service and aircraft in impeccable condition. 5 stars.
Alaska Airlines - AS (USA).
Northwest - NW (USA) - Merged with Delta.
Iberia - IB (Spain). A disaster of an airline. I would not use them even if they paid me.
Athens Airways - ZF (Greece) - Defunct.
Porter Airlines - PD (Canada). They are simply awesome.
Bulgaria Air - LZ (Bulgaria).
Malev - MA (Hungary) - Defunct.
Pineapple Air - PNP (ICAO) (Bahamas).
Southwest Airlines - WN (USA)..
TAROM Romanian Airlines - RO (Romania).
Air Choice One - 3E (USA).
All Nippon Airways - NH (Japan).
Turkish Airlines - TK (Turkey).
Austrian Airlines - OS (Austria). Technically their flights are operated by Tyrolean Airways
Frontier Airlines - F9 (USA).
Novair - 1I (Sweden). My very first flight was with Novair, on a Lockheed L1011. I loved every moment of it.
Olympic Airlines - OA (Greece) - Defunct.
Olympic Air - OA (Greece). A huge improvement to its predecessor. I have only flown with them on domestic segments.
Swissair - SR (Switzerland) - Defunct. My first non-chartered flight was on SR.
Swiss International Airlines - LX (Switzerland).
Crossair - LX (Switzerland) - Renamed. I flew with them a couple of times before they became Swiss International Airlines after the closure of Swissair.
KLM - KL (Netherlands).
CityJet - WX (Ireland/France).
Transavia - HV (Netherlands).
Augsburg Airways - IQ (Germany) - Defunct.
Lufthansa - LH (Germany).
Air Scotland - GRE (ICAO) (Scotland/Greece) - Defunct.
Air France - AF (France).
EasyJet - U2 (United Kingdom).
Ryanair - FR (Ireland).
FlyBE - BE (United Kingdom).
British Airways - BA (United Kingdom).
Czech Airlines - OK (Czech Republic).
Alitalia - AZ (Italy).
WizzAir - W6 (Hungary).
American Airlines - AA (USA).
United Airlines - UA (USA) - Merged with American Airlines
US Airways - US (USA).
Delta - DL (USA).
Asiana - OZ (S.Korea). One of the best airlines I have ever flown with. Stellar on-board service and aircraft in impeccable condition. 5 stars.
Alaska Airlines - AS (USA).
Northwest - NW (USA) - Merged with Delta.
Iberia - IB (Spain). A disaster of an airline. I would not use them even if they paid me.
Athens Airways - ZF (Greece) - Defunct.
Porter Airlines - PD (Canada). They are simply awesome.
Bulgaria Air - LZ (Bulgaria).
Malev - MA (Hungary) - Defunct.
Pineapple Air - PNP (ICAO) (Bahamas).
Southwest Airlines - WN (USA)..
TAROM Romanian Airlines - RO (Romania).
Air Choice One - 3E (USA).
All Nippon Airways - NH (Japan).
Turkish Airlines - TK (Turkey).
Austrian Airlines - OS (Austria). Technically their flights are operated by Tyrolean Airways
Frontier Airlines - F9 (USA).