Question re flight numbers
 

I hope this is the right forum to try, so here goes.
Bored senseless and with time to spare, I decided to make a list of airlines that I've traveled with since my first flight on an SAS Caravelle back in '69.
Three flights have me stumped:
ZR122, destination Aalborg, August 26
QI1223, destination Newcastle, November 5
SN869, destination Bilbao, August 6.
Unfortunately no year on the boarding card.
Anyone?
Per

SN = Sabena?
QI = Cimber Air?

Slight digression but what decides whether an airport uses an airlines IATA or ICAO code on its boards, seems to be completely random?

ZR - was Muk Air which operated from 1979 until 2001. operated ATR42 aircraft

https://en.wikipedia.org/wiki/List_o...nes_of_Denmark

https://www.planespotters.net/airlin...-%28Denmark%29

https://www.jetphotos.com/airline/Muk%20Air

Airbanda correct re. Sabena (SN) and Cimber Air (QI)

Unusual for an airport to use ICAO codes on it's boards as all airline issued tickets use IATA codes only

Thanks guys, much appreciated, I can now complete my list on Excel.
By the way, the Muk Air flight was on one of those flying matchboxes, a Short of sorts.
Per

With some notable exceptions:


https://cimg0.ibsrv.net/gimg/pprune....0c3610e6c0.jpg

I'm guessing to help passengers, more easily associate their airline in examples such as EZY rather than U2, TOM instead of BY (BY being for Britannia which anyone under 40 may not link - TUI is used by TUI Germany as their ICAO code so can't be used for TUI UK

Can't narrow it down because Muk Air operated both the Shorts 330 and 360.

And why do some airlines have the return flight no as one higher than the outward, and some one lower?

e.g.
EK9 DXB-LGW
EK10 LGW-DXB (return of same aircraft)

SQ52 SIN-MAN
SQ51 MAN-SIN

Regarding IATA/ICAO codes (depending on airport) it is the airline's preference as to whether they wish to have IATA or ICAO codes on FIDS. The airline will usually want the code to reflect what is shown on the boarding pass issued. So for example, EasyJet and TUI UK boarding passes have their ICAO prefix, it then makes sense for the airport to display ICAO prefix for said airlines.

I've noticed at some Aena airports particularly AGP, only ICAO codes are shown on the FIDS. However this could've course changed since 2 years ago.

Not sure of the reason but LH used to and possibly still have even numbered flights from Germany and odd numbered flights to Germany. Can't remember what happened on domestic routes though.

So I just write Shorts 300 Series then. ;)
So far I have listed 68 different airlines, I know there's more from China early 90'ies, but the boarding cards only says CAAC, not the name of the actual airline, and I'll be damned if I remember. Sometimes they gave a 4-digit flight number, other times not at all.
I've also listed 43 different types of aircrafts, I have not considered the different sub models, hence a B737, or an A340 is only listed once.
Must dig for more boarding cards in my, eh, archives.
I am turning into a sad old git. :sad:
Per

Different airlines have different policies as regards flight numbers. As said some use even outbound, odd inbound (or vice versa). Some do even for northbound and westbound, odd for eastbound and southbound, or any variation of that. All depends. Many airlines use alpha numeric callsigns with ATC so the flight number on your ticket is totally different from the aircraft callsign. E.G. Aer Lingus DUB-LAX is EI145 on the ticket, EIN1AK on the airwaves.

There's a few nerdy ones out there. The BA LHR-SEA flight is BAW5EA (5 looking like an "S"), so the flight ident looks like it's spelling SEA on the radar screen.

Yes I'm sad enough to notice these things when the aircraft pop up on my screen.

Or, if you're BA, you use odd flight numbers out of LHR and even flight numbers inbound for longhaul routes, and the opposite convention for shorthaul destinations.

Go figure. :O

Which wouldn't mean anything to ATC since the flightplan says KSEA.

I don't really know why IATA codes are still used for anything these days, what with 'controlled duplicates' and others that bear no resemblance to the airline or airport name. Just scrap them.

Call-sign Confusion

That was indeed the case, as I recall.

It's interesting to see that the legacy survives, 45 years after the two airlines were supposedly merged.