OnBoard Courier Airlink in the network the desk measures
Computed on 2026-09-07 from AeroDataBox scheduled route statistics. The desk holds departure schedules for 571 airports, and for the 4Z code that yields 67 city pairs across 48 of them. It is a measured sample of the published timetable and not the whole of it. Frequencies move with the season, and a quote is priced on the flights running the day you ask.
48airports on this carrier
15countries and territories reached
67scheduled city pairs held
294average daily flights across them
The schedule the desk holds carries the 4Z code on 67 city pairs, reaching 48 airports in 15 countries and territories. Some of those sectors are flown by OnBoard Courier Airlink and some are sold under its code and flown by a partner, which is how the published timetable states it and how a booking has to be read. 91.7 per cent of those airports sit on African time zones, and the next largest block is on Indian Ocean time zones.
01The longest sector held for the carrier is Jo'anna (JNB) to Nairobi (NBO) at about 2,912 km, and the shortest is Mpacha (MPA) to Maun (MUB) at about 272 km. 73.1 per cent of the pairs are under 1,500 km. This is a short sector operator, which for a hand carry out of the Gulf means it is almost always the second leg of the routing rather than the first. The airport that appears most often on those pairs is Jo'anna (JNB), on 45 of them, which is 67.2 per cent of everything held under this code.
02The thickest sector under the code is Cape Town (CPT) to Jo'anna (JNB) at about 50.4 movements a day, which across a full day is roughly one every 0.5 hours. On a sector at that cadence a missed departure costs a wait rather than a night. 19 of the 67 pairs run four or more times a day and 12 run once a day or less. The second figure is the one that matters when a consignment leaves the factory late, because on those sectors the desk will quote a different carrier rather than promise an hour it cannot hold. After Jo'anna (JNB) the code leans on Cape Town (CPT) on 16, Windhoek (WDH) on 4, Maun (MUB) on 4 pairs respectively, and those are the airports a dispatcher looks at second when the first routing is full.
The sectors that carry the 4Z code most often
The 16 sectors the 4Z code appears on most often, out of 67. Flights a day is the average daily scheduled movement on the busier of the two directions, as held on 2026-09-07. The schedule lists a code against a sector whether the carrier operates it or sells it, so read this as where the code can be booked. Distances are great circle, computed from the published coordinates of the two airports.
How a courier reaches Jo'anna from the Gulf
The schedule the desk holds shows no 4Z service into a UAE airport, so a courier does not board this carrier in Dubai. The routing is built the other way round: a Gulf carrier takes the first leg to Jo'anna (JNB), and OnBoard Courier Airlink carries the second.
The first leg, measured. These are the 2 links the desk holds from a UAE gateway into Jo'anna (JNB), the airport this code is booked through most often.
Published lanes the 4Z code can carry half of
None of the 346 lanes the site publishes is flown end to end under this code. These 14 are the ones it touches at one end, which is how a routing gets built when no single carrier covers the whole distance: a Gulf carrier takes the first leg and this one finishes it. The lane index holds the rest.
- Abu Dhabi to Johannesburg, joined at Jo'anna (JNB), which this code reaches on 45 of its pairs.
- Johannesburg to Doha, joined at Jo'anna (JNB), which this code reaches on 45 of its pairs.
- Dubai to Johannesburg, joined at Jo'anna (JNB), which this code reaches on 45 of its pairs.
- Frankfurt to Johannesburg, joined at Jo'anna (JNB), which this code reaches on 45 of its pairs.
- Johannesburg to London, joined at Jo'anna (JNB), which this code reaches on 45 of its pairs.
- Johannesburg to Perth, joined at Jo'anna (JNB), which this code reaches on 45 of its pairs.
- Cape Town to London, joined at Cape Town (CPT), which this code reaches on 16 of its pairs.
- Dubai to Cape Town, joined at Cape Town (CPT), which this code reaches on 16 of its pairs.
The countries the 4Z code opens
Of the 15 countries and territories reached, 6 are reached at a single airport, which for a courier means one airport of entry and a road leg for everything else in that country. The deepest is South Africa with 17 airports on this code. The country desk for South Africa sets out the customs practice, the working hours and the road legs behind these airports.
South Africa (17 airports), Mozambique (7 airports), Namibia (3 airports), Botswana (3 airports), Zimbabwe (3 airports), Zambia (3 airports), Malawi (2 airports), Madagascar (2 airports), Tanzania (2 airports), Lesotho (1 airports).
Where to go next on the 4Z network
Each of the 48 airports above has its own atlas entry with the full destination list, and each of the 67 sectors can be opened in the calculator with the flying time, the distance and the delivery hour worked out. Start with the atlas entry for Jo'anna (JNB), the route calculator with Dubai to JNB already filled in, the carrier index for the other 236 airlines the desk lists and the airport atlas itself.