Glad I found this thread and I can't believe no other sites mention where you board TK flight at IAD (not even official airport site, if there's such info the website is hard to navigate).

I'll soon be connecting at IAD (DL3826 - TK8) with 3.5 hours layover and I'll be running from my Delta flight to this one (Concourse B to A). However, those 2 flights have unprotected connections (unmarried segments, 2 separate tickets, whichever you call it).

If I don't have checked baggage, will I be able to check-in online, print boarding pass, and just show up at boarding gate A45? They can certainly check my passport, reprint boarding pass, etc. I think is will be critical if my flight from DTW is late, again, need information from fellow TK flyers, nothing from airlines' or airport websites.