Well, MidwestIndy insisted that he heard some sort of announcement would happen this fall, and the state of Indiana budgeted some incentives for a TATL flight from IND. Idk.
I think DL to AMS is more likely for St. Louis.
What MidwestIndy is talking about came from an official source. I don't remember if it was the airport authority or the economic development corporation. From day one IND wanted LHR and/or FRA. FRA was a joke in my opinion. Who was going to fly that route? LH? No chance. Just in recent weeks though the official word was LHR and AMS. So they've changed their focus a bit. Clearly something has come up to make them now say AMS.
Well, hopefully he will come on and explain again exactly what he heard. The way he was talking made it sound like IND-LHR was going to be announced on BA, but I guess yesterday's announcement of BNA-LHR has diminished the chances of that happening this fall. Maybe some other carrier will announce TATL.
Everything I have heard coming from both the state/economic dev. corp./airport unofficial/official has claimed that the service is expected by the end of the year (make of that what you will, I am just regurgitating information provided to me). IND met with DL about AMS-IND 1-2 weeks ago, so we will see what happens. I think LH was a pipe dream, if any service to Germany was going to happen it would be DE, and DE isn't happening in the near future, so DL and BA seem the best candidates.
IND doesn't seem like they want to wait until Fall of 2018 for new service TATL service, so unless BA adds in this fall, IND isn't going to wait around until next year for BA to make a decision.
With regards to MSP, PDX, and DTW, IMO BA adding LHR/LGW to any of those cities would be less likely, BA isn't as inclined to compete h2h with DL for many obvious reasons.
I also think we are winding down on possible new cities for BA in the US, maybe 1-2 more than that is it for a while, by the time any more get announced Norwegian would have launched the A321LR into the next most viable cities. Again, IMO IND, STL, CMH, CLE, and likely a few others will have TATL flights 2019-2020, whether on BA, DL, DY, WW, e.t.c