This question might have to wait until Ngaire returns; but hopefully, someone here can help me out.

I need to find out the earliest time we can schedule a flight out of Delhi on the 20th. I also need to find out the latest time that Regent will put us up in Delhi if we don't fly out until 21st.

The materials I saw assume a late night flight back to USA. If we go eastbound, flights are at different times; therefore, my need to know whether to fly out on 20th or 21st.