Which airline gives better service
 

I have a choice between Air Canada and Lufthansa to fly to Germany and was wondering if anyone has any comments on the service offered by these 2 airlines on their international flights?

We were very happy with Lufthansa in the air, but will not fly with them again because of the long, long check-in lines at Logan. Going to Russia, we arrived at the airport three and a half hours ahead of time. By the time we endured the very slow, very long, check in line and went through security (a breeze), we barely had time to use the rest rooms and grab a coffee before catching our flight. And, it wasn't just that one day...when checking in with other airlines, we've noticed the lines at Lufthansa have been ridiculous every time we've flown out of Logan. Could just be Logan Airport (Boston) staff.

Coming home from St. Petersburg, we also encountered long slow check-in lines, though with a partner airline. After that, passport control was slow as well. Had they not held the plane for 15 minutes, we'd have missed our flight. Thankfully, we had a two hour connection in Frankfurt! We had to go through security again - "American" security, which the most thorough I've ever seen (but this was not a Lufthansa thing).

In the air, however, everything was quite nice. The attendants were wonderful, the food was fine, and the airbuses are very comfortable in coach.

Air Canada and Lufthansa code share so you can try both, flying one airline out and the other back. Something to watch for if you find a reason to choose one over the other since either airline can sell you a flight on the other. I fly AC regularly and like the service but have not flown Lufthansa since 1978 so I can't compare.

I really liked Lufthansa's service.

Is there any difference between the two in terms of direct flights vs. connecting flights? We flew AC a few years ago out of Boston and I think that it necessitated a routing through Montreal. I soon came to value the notion of paying Air France the added money in order to get a direct flight to Paris.
One other comment: Having flown those two plus British Airways and Virgin Atlantic in the last few years, I would say that AC's seats were the least comfortable. Don't know why.