Live data from Hacker News

Airlines are running out of 4-digit flight numbers

viewfromthewing.com

101–110 of 461 posts

Re: Airlines are running out of 4-digit flight numbers

#101

Earlier quoted context omitted.

Generally it's easier to book a trip with legs on different carriers if they have a codeshare arrangement, because you can just do it as a single itinerary through one carrier's web site. Otherwise you often need a travel agent to be able to put together the itinerary (that's not strictly necessary though, just the way they make it work so no technical reason they couldn't just offer non codeshare flight numbers) The…

Also, connections. If it's a connecting flight, and the incoming flight is running late, then the airline "sorts you out". Basically they know sboit your connection and make a plan. I've been on a plane out of Heathrow that waited for a 30-min late incoming flight. I've also been on a late flight where my connection has been rebooked for me because we arrived late. If you book "2 tickets" you're basically a no-show t…

I did that once - book connecting flights on two different tickets - and although I ended up actually making the connection (despite the first flight running 2-3 hours late), the experience was so nerve-racking I swore I’d never do that again. It helped that the flight I was connecting to ended up running late too.

The reason I did it was it was a personal side-trip (to see family) on an international work trip, and although my employer would let me mix work and personal travel on their booking (provided I reimbursed them for the cost of the personal portion), the bureaucracy involved had put me off going down that path.

Re: Airlines are running out of 4-digit flight numbers

#102
post #32

Earlier quoted context omitted.

Enormous path dependance. There's a photo in that article that shows the problem: the flip-tab sign that has space for four numerical digits. I was thinking they could just switch from 0-9 to 0-9A-Z but that photo showed why that would be a disaster. Plus any solution has to be approved for use worldwide. Fortunately the two-digit IATA codes have already switched to 0-9A-Z (e.g. JetBlue is B6) so allowing constrained…

How many airports still have flip-tab signs? Do they need to stay? Aren't they adding to an already noisy area? What's their maintenance cost vs. a LCD? What's their energy consumption vs. a LCD?

I don’t know about the USA but there are likely millions of them deployed around the world, and working fine.

Re: Airlines are running out of 4-digit flight numbers

#103

Earlier quoted context omitted.

Generally it's easier to book a trip with legs on different carriers if they have a codeshare arrangement, because you can just do it as a single itinerary through one carrier's web site. Otherwise you often need a travel agent to be able to put together the itinerary (that's not strictly necessary though, just the way they make it work so no technical reason they couldn't just offer non codeshare flight numbers) The…

Also, connections. If it's a connecting flight, and the incoming flight is running late, then the airline "sorts you out". Basically they know sboit your connection and make a plan. I've been on a plane out of Heathrow that waited for a 30-min late incoming flight. I've also been on a late flight where my connection has been rebooked for me because we arrived late. If you book "2 tickets" you're basically a no-show t…

You don't need to be on a codeshare for that to work though, it just needs to be on the same itinerary - the flight numbers can be on different airlines and still on the same itinerary.

Re: Airlines are running out of 4-digit flight numbers

#104

I don't even understand the point of code-share flight numbers. The first thing I do when I see one is look up the original flight number. Most flight search engines will also show you the original carrier. Why not just get rid of them and book on the original flight number? Is it needed somehow in their systems to know how a flight was booked or what flights are eligible? Can that be fixed instead of the flight numb…

Generally in order to ticket an itinerary, there needs to be at least one flight marketed (e.g. with the airline's flight number) by the "plating carrier" whose ticket stock the flights are issued on.

I can't buy an itinerary consisting of just BA238 on aa.com but I can buy AA6981 which is its codeshare. I can also buy an itinerary where I fly AA on BOS-JFK and connect to BA JFK-LHR, because there's at least one AA-marketed flight on the ticket.

The marketing carrier also can affect how the operating carrier gets paid -- codeshares can have different inventory which allows airlines that are partners but not super close to hold back inventory for themselves.

Re: Airlines are running out of 4-digit flight numbers

#105
post #104

I don't even understand the point of code-share flight numbers. The first thing I do when I see one is look up the original flight number. Most flight search engines will also show you the original carrier. Why not just get rid of them and book on the original flight number? Is it needed somehow in their systems to know how a flight was booked or what flights are eligible? Can that be fixed instead of the flight numb…

Generally in order to ticket an itinerary, there needs to be at least one flight marketed (e.g. with the airline's flight number) by the "plating carrier" whose ticket stock the flights are issued on. I can't buy an itinerary consisting of just BA238 on aa.com but I can buy AA6981 which is its codeshare. I can also buy an itinerary where I fly AA on BOS-JFK and connect to BA JFK-LHR, because there's at least one AA-m…

Aha! That's a very interesting detail!

Re: Airlines are running out of 4-digit flight numbers

#106

Earlier quoted context omitted.

How many airports still have flip-tab signs? Do they need to stay? Aren't they adding to an already noisy area? What's their maintenance cost vs. a LCD? What's their energy consumption vs. a LCD?

[flagged]

I do. I was just traveling about a month ago and the gate info had changed on the monitor but not on my phone and this was both ways. I always check the monitor and use that as the system of record over my phone.

Re: Airlines are running out of 4-digit flight numbers

#108
post #58

> Except they don’t. American Airlines, Delta, and United are running out of flight numbers, and nobody knows what to do about it. All of the above mentioned airlines are the size they are because of mergers. Why don’t they use the IATA codes of the airlines they absorbed. For example Delta merged with Northwestern. In addition to DL, they could also use NW. American merged with USAirways. They could use US in additi…

That would be a recipe for confusion among pilots and controllers. They rely on visual sighting of aircraft for some operations and have to maneuver in relation to each other so if the livery doesn't match the IATA code then that increases the risk of error.

That’s not really true. The regional carriers like Republic and so on have had a variety of different paint jobs (United Express, American Eagle) and it hasn’t been considered an issue. Not to mention the issue of random call signs like Brickyard and so on.

And regardless of that we’re talking about codeshares anyways.

Re: Airlines are running out of 4-digit flight numbers

#109
post #83

I love that so many people here think they can think about the problem for 10 seconds and come up with a solution that hasn't already been considered a thousand times and discarded.

Any well-written article should anticipate, ask, and answer the obvious questions. For example: Why not use alphanumeric characters? And if the answer isn't known by the sources the writer quotes, the writer should say so.

Answered in this comment by “hagbard celine” under the article: https://viewfromthewing.com/airlines-are-running-out-of-flig...

Re: Airlines are running out of 4-digit flight numbers

#110

Earlier quoted context omitted.

How many airports still have flip-tab signs? Do they need to stay? Aren't they adding to an already noisy area? What's their maintenance cost vs. a LCD? What's their energy consumption vs. a LCD?

[flagged]

I do. "The phone" is just another hassle one doesn't want to take care of on long-distance travel. Paper tickets just work, can't say that for the login for travel / rewards apps when you think you were already logged in when being offline.
Post reply on HN