DS 160 - Need help in filing "Address where you will stay in the US"

[ks86]

Hi,
I plan to visit US in December for about 20 days on B2 visa to visit my husband who is on F1 visa in Pittsburgh. I will be staying with him in Pittsburgh for most of my trip duration.

During my onward journey from India I will land at Philadelphia (Port of Entry) and stay at my friend's place for a couple of days and then travel to Pittsburgh.
My return flight to India is from Pittsburgh.

In this case what should I fill in the "address where I will stay in the US" and US contact Person
1) My husband's address at Pittsburgh
2)My friend's address at Philadelphia.

I am unsure because for most part of my vacation i will be staying in Pittsburgh and also my return flight is from Pittsburgh. I tried finding information on this online but could not get any clarity.
Please suggest what would be appropriate here so that Visa interview and check at port of entry both go smooth.

Thanks in advance

[MadeinIndia]

It's always the address of the place you will spend your first night in the US. As for the contact person, you can give your husband's name and phone number!

[ks86]

Thanks

If my return flight is Pittsburgh-Chicago-London-Bangalore. I only have change terminals to take next fight at Chicago.
So even the security check and other formalities will be completed at Pittsburgh I think

I) What should I fill up in Departure City and Departure Flight .

a) Pittsburgh and flight from Pittsbugh-Chicago
b)) Chicago and flight from Chicago-London

II) Similarly for the onward flight should I fill up
III) For arrival/Departure flight do we fill the airline or flight number?
Flight number for flight Bangalore-London or London-Philadelphia

Please help.