| Airline Name |
ICAO |
IATA |
Callsign |
Country |
| Oasis Hong Kong Airlines |
OHK |
O8 |
OASIS |
Hong Kong |
| Oasis International Airlines |
AAN |
OB |
|
Spain |
| Occitania Jet Fleet |
OJF |
|
|
France |
| Ocean Airlines |
VCX |
VC |
OCEANCARGO |
Italy |
| Oceanair |
ONE |
O6 |
OCEANAIR |
Brazil |
| Odessa Airlines |
ODS |
5K |
|
Ukraine |
| Odette Airways |
OAW |
|
|
Switzerland |
| Odyssey International |
ODY |
OL |
|
Canada |
| Offline Officers |
|
|
|
United Kingdom |
| Okada Airlines |
OKJ |
|
|
Nigeria |
| Okay Airways |
|
BK |
|
China |
| OLT |
OLT |
OL |
|
Germany |
| Olympic Air |
OAL |
OA |
OLYMPIC |
Greece |
| Olympic Airlines |
OAL |
OA |
OLYMPIC |
Greece |
| Olympic Airways |
OAL |
OA |
|
Greece |
| Olympic Aviation |
OLY |
ML |
|
Greece |
| Oman Air |
OMA |
WY |
OMAN AIR |
Oman |
| Oman Aviation |
OAS |
WY |
|
Oman |
| Omni Air International |
|
X9 |
|
United States |
| One-Two-Go |
|
OX |
|
Thailand |
| Ontario Express |
OEL |
9X |
|
Canada |
| Onur Air |
OHY |
8Q |
|
Turkey |
| OpenSkies |
BOS |
EC |
MISTRAL |
United Kingdom |
| Orange Air |
ORJ |
|
ORANGE SIERRA |
Sierra Leone |
| Orbest |
OBS |
|
|
Portugal |
| ORBI Georgian |
|
|
|
Georgia |
| Orca Air |
ORK |
|
|
Egypt |
| Orel State Air Enterprise |
ORM |
|
|
Russian Federation |
| Orenburg Airlines |
ORB |
R2 |
|
Russian Federation |
| Orex Orbit Express Airlines |
ORX |
|
|
Turkey |
| Orient Eagle Airways |
OEG |
4R |
|
Kazakhstan |
| Orient Thai Airlines |
OEA |
OX |
|
Thailand |
| Oriental Air Bridge |
NGK |
|
|
Japan |
| Origin Pacific Airways |
OGN |
QO |
|
New Zealand |
| Orion Air |
TAG |
HS |
TAGGE |
United States |
| Orion Airways |
ORN |
KG |
|
United Kingdom |
| Orionair |
ORI |
|
RED GLOBE |
Spain |
| Orix |
|
|
|
United States |
| Our Airline |
RON |
ON |
OUR AIRLINE |
Nauru |
| Overland Airways |
OLA |
OJ |
|
Nigeria |
| Overseas National Airlines |
|
OV |
|
United States |
| Ozark Airlines |
OZA |
OZ |
|
United States |
| OzJet |
OZJ |
OZ |
|
Australia |
