Hey yall im new here. I just booked ORD to NRT(J) - HND to ORD (F) for next March!

I wasn't able to secure F both ways and didn't wanna miss our time window, so I settled for J one way. I imagine the way of upgrading is find a seat, and call them? Anyways, that's not why I'm posting.

I couldn't find any data of when ORD flies the new planes as there's no fixed schedule, so I pumped 6moths worth of flight data into GPT to find the best ods of getting the new plane.
This is hardly scientific, and subject to change I'm sure. But here's what we determined based on available data.

• NH 11 (11:50 AM to Narita):
  • Best Days: Monday, Tuesday, Thursday, Friday, and Sunday (all show nearly 100% new suites).
  • Avoid: Wednesday and Saturday (very low odds).
• NH 111 (5:45 PM to Haneda):
  • Best Days: Tuesday, Wednesday, Thursday, and Sunday (all 100% new suites).
  • Avoid: Monday and Saturday (lower odds).

Return Flights:

From Narita NH 012:
• Best Days: Monday, Tuesday, Thursday, Friday, Sunday
• Avoid: Wednesday, Saturday

From Haneda (reverse of NH 112):
• Best Days: Tuesday, Wednesday, Thursday, Sunday
• Avoid: Monday, Friday, Saturday

Im curious to compare my data of future flights to previous flights to see the level of accuracy. Does anyone know how to find that info?

Hope this post helps someone