Hi,

i was wondering if anyone knows of any cheap tickets departing from

Departing Singapore on 30 June in the evening around 8pm. Arriving in Tokyo in the morning as i am rushing to visit an exhibition.

Departing from Tokyo on 7/8 July at 6pm.
I had wanted to go on the Northwest promotion but they only have morning flights.
Is it cheaper to get a departure ticket from one airline and inbound from another?

Also, how does one travel from Narita to Odaiba, which subway line to take?

Thanks. Would appreciate all the help that I can get.