Originally Posted by
potfish
It's mostly the BOS-MAD flight $850. From
https://matrix.itasoftware.com
The NRT-BOS flight is around $355.
Add those together and you get more than the total, which is a bit confusing, but I think it's clear we need to decide how much we want to stop in Madrid...
47000/136.078 = 345 (ROE=rate of exchange, NUC=neutral unit of construction-currency). So 850 + 345 = 1195. Close to your 1151. NUC & ROE of may be different on the day your calculation was done
Agree with looking for codeshares on those flights. Airport arrivals/departures often list code-shares. As does FR24, flightaware and similar web sites. As a guess AA get more $ when more AA marketed flights.
https://en.wikipedia.org/wiki/Neutra...f_construction
https://www.iata.org/en/services/finance/xrates/
Good luck