Connecting flight in Munich 45 min ground time

You will go through border control (aka passport control aka immigration where they will stamp your passport) in Munich on your way to the gate to catch your flight to Venice. If the first flight arrives on time you are supposed to make it if not the Air Dolomitit is obligated to put you on the next flight with an available seat to Venice; but, only if you are traveling on one booked ticket and not two separate tickets.

They appear to have 5 non-stops a day so things look good if you happen to not make it in 45 minutes

8:25 AM –
9:25 AM
Air DolomitiLufthansa
1 hr
MUC–VCE

11:50 AM –
12:50 PM
Air DolomitiLufthansa
1 hr
MUC–VCE
Nonstop
3:20 PM –
4:20 PM
Air DolomitiLufthansa
1 hr
MUC–VCE
Nonstop

6:40 PM –
7:40 PM
Air DolomitiLufthansa
1 hr
MUC–VCE
Nonstop

9:55 PM –
10:55 PM
Air DolomitiLufthansa
1 hr
MUC–VCE
Nonstop

Thank you for the information. I think I might change to Air Dolomiti to the next flight, just for a little more peace of mind.

Are both flights on one ticket?

Checked bags?

If MUC is your first Schengen stop, you will do passport control there, on arrival, before you can move on to the next flight.

I made this same connection at the end of August and worried about it the whole flight to Munich. It was an extremely easy connection to make. You walk through passport control on your way to the next gate. I was at the next gate in 20 minutes. I actually had to sit and wait for boarding.

I would let this connection stand. I know it seems way too short, but in reality it is not.

Unfortunately the two flights are not on the same ticket, but I will only have carry on bags. I will study the terminal map so I will know how to get to Air Dolomiti’s gates.

Unfortunately the two flights are not on the same ticket,

Hopefully, you have a way to get your boarding pass in advance, or you can get it a the gate (I don't know, can you do this?) Otherwise, you'll have to go out of security to check in at the Air Dolomiti counter and that would probably end your chances of making the next flight. If you already have your boarding pass, or know you can get it at the gate, all you have to do it get to the middle of the concourse, go through immigration, and then go down to the Schengen level and to your gate. Worst case, one of your flights will use the newer "Satellite" concourse and you will have to take on of the dedicated (in- or out-of-Schengen shuttle trains between the concourse.

Is the incoming flight United, or a United ticket code shared with a Lufthansa flight? It looks like most United flights are arriving on the H (upper) level in the original Terminal 2, while most Lufthansa flights from the US are coming into the upper, L level of the satellite. It looks like the first wave of Air Dolomiti flights to Italy in the morning are using K gates, the lower level in the satellite, but I think those flights might leave before your flight arrives. It looks like the next wave might use G gates, which would be one level down from the United gate (that would be good). I, or someone else more familiar with the MUC schedule board would determine exactly what gates are being use if you tell us the flight numbers.

• Just a heads up about using 2 different tickets - I can't imagine Air Dolomiti is under any obligation to put you on another flight, you might lose the money & have to book a new ticket, something to think about. AND if you didn't make the flight out of Munich to Venice, I believe your return on Air Dolomiti would be automatically cancelled. In your situation with 2 tickets, I would take a later flight connection.
• But if you go with the shorter connection time, I'm assuming you can get your boarding pass for Air Dolomiti printed at home? If you're leaving too soon for that, what about checking in on-line before your UA flight leaves? Or on board pay for wifi, get boarding pass (and a decent seat), take a screen shot. Usually there's an option to email it to yourself, you can get that too.
• I wouldn't exit security, that makes it much less likely you'd make your connection.

Using the flight information provided by A.I. (above), I looked up departures from MUC to today, and the first and last departures (8:25 & 21:55 were from K gates. The 11:50 & 15:20 departures were from G gates. The 18:40 departure was not shown for today. Assuming you United flight is not getting in before 8 AM, nor leaving at 18:40 or later, your connecting flight will probably leave from a G gate, which is one floor below the H gates in the original T2 building. Without knowing more about your flights, that's the best I can do.

But, be aware that I've been on flights from the US that arrived an hour early, and I have been on flights that have arrived an hour late, so scheduled arrival time does not mean a lot. You could arrived with plenty of time, or you could arrive too late to make the connection.

Thank you to you all! You have provided a wealth of information for me to consider as well as some wisdom. I love this travel forum. As I begin my travel adventures, I hope to learn and share from my experiences like all of you. Thanks again!