KEF (Reykjavík) is only 3 times a week from LHR too.

Not for much longer it won't be - it's going daily from October.

Methinks Malta should go daily again following their generous douze points for us in last weekend's Eurovision.

To my continued annoyance, the LGW-GOA route does not fly on Tuesdays for some reason

That annoyance reminds of the time when PHX did not have a flight on Wednesdays. Well, for a period there was, then wasn't and now there is again (since spring of 2015 I'm thinking).

H

Deleted

MEX is not daily either. Don't think anyone has mentioned it.

PLS twice a week, based on recent experience of looking for flights.

Flights that are not daily certainly can and do make revenue for the airline, many short haul routes started off less than daily, as did some long haul and as business on said route picked up, frequencies rise.

Some routes cannot be served daily due to government restrictions. LAD is a prime example of a route only served twice per week which does (or did) generate considerable revenue but which cannot be operated more than twice weekly without negotiation with the Angolan authorities.

On a side note, the crews often love a route not served daily, again particularly on long haul as we get longer in said destination ;)

Regards
D1L

It currently is.

KLX. Seasonal and only 3 a week, I think.

YUL, 6 flights a week if I am not wrong

Edit
Just checked and I am wrong but last winter it was definitely 6 days a week, back to 7 now.

Gosh, so it is! LHR to MEX every day and in an aeroplane that features F.

When I last flew there it was three flights a week so the demand for Mexico must be much higher. Great, it's a nice place.

Over winter EZE is indeed not daily; however the summer timetable is daily. Only reason I know is I flew on the last Thursday during the winter schedule earlier this year. My bags flew on the next flight which I thought (and hoped!) was Friday....turned out it was Saturday! Luckily BA EZE ground staff were excellent regarding the delayed baggage, so it wasn't too big a hassle.
POS is another non daily.

And IIRC (others may perhaps confirm/deny ...?) many years ago it was actually only a twice-weekly - and as such a very strong favourite with crew. Not surprisingly ! In the days before cost-control and cutbacks, they would be left to enjoy a 3 or 4 day layover on the lovely Mauritian beaches ;) But I also seem to think that some time later BA management introduced dead-heading arrangements back to DXB where they would be rostered for other sectors.

(MRU was always linked with SEZ ......but I imagine it's all different now.....)