I loved BA the time I flew them. It was RT to Paris through London. I got to choose a long layover in London (22 hrs!) on the way home and chose that so I could go into London for the first time. I had a whirlwind 8 hr tour around London! They delayed my flight in from the US and I missed my connection to Paris and I almost missed the Paul McCartney concert I was going to the night I arrived (about 8 hours late arriving to Paris). I had been upgraded on the flight though. It was luxurious! Great planes/service...
Delta is my least favorite (great since i live in Atlanta, their hub!) which I flew last summer. Crap food, ok service, old plane. The monitor for the movie was right next to me seat so I couldn't even watch it bc the other one was too far away (like a 12 inch tv!)
United is nice, but I hate their 767s and going through Chicago. LONG flight when you're coming home esp. since it's farther west than Atl. US Air are ok. I've flown NW and Continental ages ago, but wasn't impressed. This was way before 911 (mid 90s) so who knows what they are like now.
Air France are my favorite- even in the back of the plane, you get great food, drinks, real silverware, menus, etc.... Very professional staff, etc. And I love airbuses!
I'll likely be taking Aer Lingus this summer for the first time. Anyone have any feedback about them?