How to book tickets on DB app from regional Switzerland to regional Germany

Are you trying to purchase the Spartageskarte?

My understanding is that it's a promotional day pass sold in advance for specific dates, in limited quantitie,s and valid on any route all day long. So this being accurate, if you miss a connection, then you just take the NEXT train that comes along. I'm guessing that the sale of this day pass is set up just for journeys with standard connections.

https://www.sbb.ch/en/offers/saver-day-pass

bhawke88, We do have a few people that know this stuff very well and I have seen them spend a lot of time solving problems. If you add the exact date there is a chance you will get someone here to figure it out without question. Otherwise it can be a lot of work and the OP responds, yea, but not on my date.

If I attempt to book on the the DB app with default settings I can get the tickets. However, some of the connections are extremely tight. If I increase the transfer time period at one or more of the connecting stations, I no longer get a ticket offer and ticket price. Instead I get the following message - "No price information available".

Konstanz is the border station, so technically speaking, it is a Swiss station for your journey. That's why the first port of call for your booking is SBB.ch and not the German railway website. You won't be able to find SBB connections that you make deviate from the standard schedule or SBB day passes there, for example. You should still compare prices, though, as SBB is always expensive.

However, some of the connections are extremely tight.

In my experience, this is not a problem at all with Swiss railways.

However, some of the connections are extremely tight.

SBB never offers extremely tight connections. They do know however that people like to keep on the move, and will offer efficient connections. You may just not understand that 3 minutes is perfectly fine to change trains.

Your problem is that you are trying to solve a problem that does not need solving. Just buy a ticket Sion - Konstanz. What is probably happening is that you increasing the transfer time leads to DB requesting something from SBB that the SBB does not understand...

Anyway, booked in advance you will probably get a Saver Day Pass, which is good on all public transit in Switzerland (and Konstanz is the border between the Swiss and the German networks) so you do not have to worry about anything really.

I always tell people when changing trains, to remember, you are not on an airplane. You don't have to stay seated until the train has stopped at the station.

Know the station sequence, when you are approaching your change station. Hopefully, the coach will have a sign at the end telling you what the next station is.

Before you get to the station, get up, gather you things, and proceed to the door, ready to get off as soon as the door opens.

Also know the platform for the connecting train. You might want to check the departure board on the platform when you get off, or you might want to ask the conductor beforehand if he can tell you from your ticket which platform to go to. Occasionally platforms do change from the published list, but in my experience, that is rare. I think I've only seen it one time, over thirty years ago.¹

Follow the herd. Everyone getting off will probably be going to the connecting tunnel (or rarely a bridge). When you get to the connecting tunnel, locate the stair to the next platform. There are numbered signs high on the wall over the stairs. Go up the stairs to the platform.

The conductor will be standing on the platform watching people get on. He/she will not release the train while passenger are still boarding. Stay with the herd, and you shouldn't have any problem.

1. In 1988, I was in Buchloe Bhf on the way to Füssen. The train to Füssen was switched from the main line platform to a farther out one to allow the express train from Munich, which was running late, to go straight through the station on the main line.

Thanks for all your excellent replies. The penny dropped for me too, that it wasn't a DB service but a SBB service. And the the Swiss Daily Saver Pass would be the way to go.
Thanks again.

I just came back from Konstanz in December - you are on the money that it is better to book via SBB. Konstanz is a German enclave within Switzerland on the southern (Swiss) side of Lake Constance. I got there from Zürich airport and used SBB. DB is not really relevant there.

Having said that, Konstanz is a marvellous city, well worth your time. Enjoy!

Lavandula