likely not. Around the holidays, they reduce frequency on certain days due to reduced business demand. In fact, we flew to India via FRA last year on Xmas day, and when looking around, noting hat different frequencies weren’t running. The day we flew out, both UA FRA flights were running, but I think the LH one didn’t. On Xmas eve and day after Xmas, only one of the two were running, IIRC.

This comes up up multiple times a year - with people wondering why X flight isn’t running on whatever day around Xmas, Thanksgiving or New Years. For some international destinations, they rotate hubs. For example, to NRT, the SFO, DEN and IAD flights might run one day around the holidays, while they won’t run the following day and LAX, ORD and IAH will. Those are examples only.

UA isn’t the only carrier to do this around this time. For example, going onto BLR from FRA, which is typically daily on LH, they only run I think 4 x that Xams week, or at least did last year.

Are you shocked UA and LH are operating with a reduced schedule on Christmas Eve? All you should be concerned with is whether LH has a later flight from FRA to FCO on Christmas day (IMHO). They probably do but it’s worth a quick check.

Probably not. Looks like they cancelled that flight that day. Stick with what you were rebooked to or call and get rebooked to another flight. An hour connection at FRA is not a problem unless the first flight is delayed.

Do you have a separate ticket for FRA-FCO?

There’s also a 1:55pm departure on Air Canada via Toronto. I’d try for that as it’s close to your original time and gets into FCO earlier on the 25th.

I wouldn't. I hate doing USA-CAN-other connections due to the separate airport areas for transborder flights.

Yes but IIRC some airports make you enter Canada first and I've heard of people having to wait in a holding pen before the international departure. I don't know specifically what the current transborder to international transit path would be at Toronto.

correct. You need to be heads up. But you make a sharp turn when the main route is straight and the there’s a person who waves you past and you’re done.

OP would go directly to ‘customs B’, which is a cursory check by the Canadians, and after clearing, drops them in the international gate area. No extra security either. The only way they wouldn’t be able to do that is if they arrive and ‘customs B’ is closed, but that doesn’t happen until sometime in the evening, so assuming a standard connection to an evening TATL, shouldn’t be a problem.

or if they miss the sign, which I almost did. The INTL area is fine including a Maple Leaf Lounge.

As a *G, I prefer 2+ hours at FRA to shower in LH Senator Lounge. When my FRA connection time has been just 1 hour, it’s not been enough for a full ‘refresh’ post red-eye.

i would never book a 1 hour connection in FRA. While it can be done there is also a 1 in 3 chance it cannot. My transfers through FRA (at least 8 in last 3 years) have ranged from 45 to 2 hours.. this is the real time from leaving plane to arriving at next flight gate. Granted I have not flown through there on 24 Dec.

well. The flight is cancelled and won’t return, so your options are limited.