Originally Posted by
MR_MAMA
You don't want to lose the flight, so take the 15 min and make the call. Why can't you call for a few weeks?
Thank you very much for your very useful suggestion. As I wrote, I can not call DL now

. It could be zillions of reasons, should I explain?
Originally Posted by
X3Skier
Clear your cookies and try again.
OTOH, I had a similar problem some time ago and it took a supervisor working with the AF people to eventually get it booked. Something about it being available in the AF system but not Delta.Dumb (surprise!).
If the Cookies step doesn't work, call ASAP.
Cheers
Thanks, X3Skier, clearing cookies didn't help, I tried.
Finally I was able to get it semi-booked using FFox

. Instead of last confirmation page, I got a page with my reservation number and request to contact them to finalise the booking. But at least I don't need to call DL right now.
It seems like the first problem was in Chrome/DL compatibility.
Also you are right, booking on AF flight sometimes requires agent intervention.
_______________________________
One more interesting observation. Now even if you are looking for "Economy" tickets and selecting them by price, the system also shows cheapest First/Business tickets (of coarse if they are available and comparable in price, like 90K medium Y with 100K low J).
And finally, I like this "broken" system more and more

.
May be I like it because I've got some glue how dl.booking works and what is behind it's "logic".
But at least it keeps the low award tickets hidden in a secret storage space.
If you know where is the storage, plus if you have a picklock (sorry, DL lost the key about 2 years ago), you can be lucky

.