Question.. Your right
So when I book 2 the codes are B/A then O/B
But when I book for 1 its B/r than O/B
What's the difference between A and R based on eth status you mentioned. Thanks!!!

Sorry Yes!
April 18th from Bos to Barcelona on the 4:54pm flight
April 24th Barcelona to Boston on the 11:15flight
Booking the premium economy.
Its the fees and flight cost a bit that add up.