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Airlines are running out of 4-digit flight numbers

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

#92

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 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 to the first flight, and you're on your own dealing with that airline.

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

#93
post #86

Obviously the solution is airline code + iata source airport + iata dest airport + airline scheduled flight # for the day/week UA-LGA-LAX-001 LH-LHR-FRA-012 /obviously/

This also doesn’t take up any more data, the pnrs have this info anyway, it’s just reordering it

UA001 from LGA to LAX

LH012 from LHR to FRA

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

#94

Wouldn't the easy solution be to use two sets of letters for IATA coded flights for the same airline? Something like "DL1234" and "DZ1234" for Delta? I know a lot of the two-letter codes are claimed too, and I'm sure there must be some reason this wouldn't work OK, but it would seem like they they would each have at least one code left over from the various airlines they've acquired over the years? If an American Air…

That's not such a great solution, it kicks the can down the road and it's super confusing to humans to have the same airline be represented different ways.

As a traveler, I already know the airline name because it's printed on my boarding pass, so I don't really care what two-letter prefix they use; to me it's just another part of the opaque handle they call a flight number.

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

#95

Wouldn't the easy solution be to use two sets of letters for IATA coded flights for the same airline? Something like "DL1234" and "DZ1234" for Delta? I know a lot of the two-letter codes are claimed too, and I'm sure there must be some reason this wouldn't work OK, but it would seem like they they would each have at least one code left over from the various airlines they've acquired over the years? If an American Air…

I get the appeal (and the 60 years of accumulated technical skeletons, and the business and legal necessity) of keeping all of the airline’s segments coded as the same carrier and notionally able to connect to one another. I do wonder, though: in your scheme with a notional “DL” range and a notional “DZ” range, would it be feasible to partition the real-world flight networks in a way that keeps all the tickets as “same-carrier” according to the legacy logic?

That is, could you partition the flight network such that nobody has purchased or ever will purchase a single ticket that spans flights from both ranges? Assuming maybe that a significant number of “backbone” flights (e.g. between hubs) can themselves be “codeshared” between the new DL and DZ ranges. If so, how much new flight number space could you buy, considering the tradeoff between “codeshare all the new DL/DZ flights” and “free up the most new flight numbers”?

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

#96
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.

Agree. This type of article is classic nerd-snipe fodder for the HN masses.

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

#97
post #94

Earlier quoted context omitted.

That's not such a great solution, it kicks the can down the road and it's super confusing to humans to have the same airline be represented different ways.

As a traveler, I already know the airline name because it's printed on my boarding pass, so I don't really care what two-letter prefix they use; to me it's just another part of the opaque handle they call a flight number.

If only things were always that simple.

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

#98
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.

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

#99
post #62

> 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…

>For example Delta merged with Northwestern. Northwest Airlines. I'm sorry if I'm pedantic, but Northwest was my childhood airline flying with my dad on many of his business travels and I have many fond memories with them. My Delta SkyMiles account hails from Northwest WorldPerks, opened in 1998! I might also have a soft spot for Delta because of that too.

AKA Northworst.

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

#100
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 think Russia still does.
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