I must admit that it's a shame to see British Airways drop Dallas from their route network regardless of the JV with American Airlines.
It's also a loss to Dallas being such an important city in the USA as well as being home to one of the world's busiest airports.
As many of you are aware, London to Dallas was a route that British Airways inherited from the merger with BCAL in 1988. BCAL started LGW to DFW in February 1981. The route remained at LGW after the merger but subsequently moved to LHR in 2008 after the Bermuda 2 agreement was abolished.
With British Airways dropping Dallas, it reminds me of the fact that they previously served several destinations in the USA with their own aircraft, which includes the following.
Anchorage
Charleston
Charlotte
Dallas
Detroit
Ft Lauderdale
Oakland
San Jose
Plus Honolulu during the days of BOAC.
Hopefully, British Airways will resume Dallas at some point in the future.
Although I'm not too surprised regarding Bahrain and Kuwait also being dropped from the airlines network. I should imagine that both of the home carriers have an advantage over British Airways considering the size of their markets.
Bahrain as others have pointed out was once an important destination for British Airways. Important enough for it to be the first destination on the British Airways network way back on the 21 January 1976 to receive a commercial Concorde flight. British Airways on the 21 January 1976 inaugurated their first commercial flight's with Concorde between LHR-BAH-SIN.
Regarding the Middle East and including the two destinations mentioned. British Airways previously flew to the following destinations within the region.
Aden
Aleppo
Baghdad
Bahrain
Beirut
Damascus
Damman
Dhahran
Kuwait
Muscat
Sanaa
Tehran
In reality the British Airways worldwide network has drastically shrunk over the last few decades and that's regardless of the recent pandemic.
Regarding their worldwide network the number of countries and destinations that the airline previously flew to probably outweighs the amount that they currently serve.
I could do a list of those former destinations as I do enjoy making them 😉