Originally Posted by
sunrisegirl
And I know the 3rd 747 on the route starts earlier than 12th November
It's some time towards the end of October when the winter season starts.
29 Oct to be exact

:
[KVS Availability Tool 6.9.5/Diamond - Amadeus: Timetable/NL-BCDF]
Code:
LON London Metro UK = LHR LGW STN LTN LCY QQS QQW ZLS ZEP
MIA Miami Intl FL US [KMIA]
MON 29 Oct 2012 - 05 Nov 2012
Carrier Flight From Depart To Arrive A/C St Frequency | Dur'n | Dep T | Arr T | Effect | Ending | Exceptions
--------- ------ ---- -------- ---- -------- --- -- ----------------------------------------------------------------
BA 207 LHR 09:40 MIA 15:25 744 0 123456- 09:45 5 - 29 Oct 03 Nov Mon 05 Nov
BA 207 LHR 09:40 MIA 14:25 744 0 1-----7 09:45 5 - 04 Nov 04 Mar Mon 29 Oct
BA 209 LHR 13:35 MIA 19:25 744 0 123456- 09:50 5 - 29 Oct 03 Nov Mon 05 Nov
BA 209 LHR 13:35 MIA 18:25 744 0 1-----7 09:50 5 - 04 Nov 04 Mar Mon 29 Oct
BA 205 LHR 15:00 MIA 20:50 744 0 123456- 09:50 5 - 29 Oct 03 Nov Mon 05 Nov
BA 205 LHR 15:00 MIA 19:50 744 0 1-----7 09:50 5 - 04 Nov 05 Nov Mon 29 Oct