I ran into an OLCI bug today. I flew TPA-LAX nonstop on NW metal this morning, and I'm returning LAX-ATL-TPA on DL metal tonight.

I had no problem checking in online for my NW flight about 20 hours in advance, and flew that leg without incident.

But this afternoon when I went to check in for my return leg, on the main itineraries screen, the only "More info and Options" link for this itinerary was "Trip Details", with no "Check In" link as typically shown at T-24 before a flight. Once I click the "Trip Details" link, I am taken to a page that shows to "Check In" links. However, when I click on them, a new window opens that says "Redirecting to Northwest". Once this window finished loading, it tells me "Your flight from TPA has departed."

Arriving at the airport with an hour to spare, I thought the kiosk would not let me check in either, but there was no problem there.

I assume that this problem is a combination of being an NW leg followed by a DL leg, and being on the same day. I think I've done similar NW-DL itins on different days that worked without a problem.