EKinBigD

Not the best possible:

$1,436

Flight 1
Thu, Nov 6 MIA to DXB – 1 stop 23h 30m

This is a multi-airport itinerary. Please review all the airports below.
This flight leaves on Thursday (Nov 6) and arrives on Saturday (Nov 8).

British Airways – Flight 204 8h 20m
Take-off Thu 10:40p MIA Miami, FL
Landing Fri 12:00p LHR London, ENG, United Kingdom
Prem Economy | Boeing 777 (Wide-body Jet) | 8h 20m | 1 seat remains
Change planes

LHR London, ENG, United Kingdom

8h 15m
British Airways – Flight 105 6h 55m
Take-off Fri 8:15p LHR London, ENG, United Kingdom
Landing Sat 7:10a DXB Dubai, United Arab Emirates
Prem Economy | Boeing 747-400 (Wide-body Jet) | 6h 55m | 3 seats remain
Flight 2
Wed, Nov 26 DOH to BAH – nonstop 0h 50m

This is a multi-airport itinerary. Please review all the airports below.
This flight leaves on Wednesday (Nov 26) and arrives on Thursday (Nov 27).

British Airways – Flight 124 0h 50m
Take-off Wed 11:45p DOH Doha, Qatar
Landing Thu 12:35a BAH Bahrain, Bahrain
Prem Economy | Boeing 777 (Wide-body Jet) | 0h 50m | 9+ seats remain

I got DFW-DXB/DOH-BAH in all Prem Econ for $1,044 w/the AARP discount. Using it as a positioning flight AND to satisfy AA Plat Challenge in one shot (with a little extra comfort).

e.g. PRE-AARP discount $1,110:

Flight 1: Dallas – Dubai
Wed, Nov 12
4:50 pm – 7:25 am+1
Dallas – London · DFW–LHR
British Airways 192 · Premium Economy · Boeing 747
Overnight flight
8h 35m
Layover in London LHR
12h 50m
8:15 pm+1 – 7:10 am+2
London – Dubai · LHR–DXB
British Airways 105 · Premium Economy · Boeing 777
Overnight flight
6h 55m
Flight 2: Doha – Bahrain Island
Wed, Nov 26
11:45 pm – 12:35 am+1
Doha – Bahrain Island · DOH–BAH
British Airways 124 · Premium Economy · Boeing 777
0

You can play around with DOH-BAH, BAH-DOH, AUH-MCT, or MCT-AUH as the last sector as well as into DXB, AUH, MCT, BAH, DOH, & even KWI, JED, RUH, or CAI as the original destination. Usually into DXB works best with BAH-DOH or DOH-BAH as the last segment (but I'm sure "someone" will point out if I'm mistaken).