UK airfare taxes, duty etc

That fare from Belfast sounds very high (per person return flight,yes?)

I'd say the problem is leaving from there rather than UK airport/fare taxes...you should be able to get a flight from London for the same price as the one from Dublin for example.

£550 for end of June sounds about normal price to me....

BTW if you don't mind an indirect flight (eg stopover for a couple of hours in Doha) the cheapest option is often Qatar airlines.....

At that time of the year this is standard fare price, have just checked it on fly scanner. May be better getting a flight from Belfast to say Heathrow and then go for a cheaper option of 1 stop over mosy probly via Dubai or India.... It's real expenisive I know but they know its vacation time for most europeans who have a mostly mild summer climate....

The main reason is simply that ticket prices are higher from Belfast, not because of taxes and other fees (although those contribute slightly). See details below. The fare difference in the ticket itself makes up £439 of the total difference.

DUB-KUL

Fare 1: Carrier MH OLBC6IE DUB to KUL (rules)
Passenger type ADT, round trip fare, booking code S, O
Covers DUB-AMS (Economy), AMS-KUL (Economy)
£126.68
Fare 2: Carrier MH OLBC6IE KUL to DUB (rules)
Passenger type ADT, round trip fare, booking code O, S
Covers KUL-LHR (Economy), LGW-DUB (Economy)
£126.68
The Netherlands Passenger Service Charge (RN) €6.69
The Netherlands Noise Isolation Charge (VV) €2.00
The Netherlands Security Service Charge (CJ) €7.17
MH YQ surcharge (YQ) €248.62
MH YR surcharge (YR) €2.98
MH YQ surcharge (YQ) €7.46
Irish Passenger Charge (UP) €16.95
Irish Air Travel Tax (LQ) €3.00
(YQ) €28.61
United Kingdom Passenger Service Charge (UB) €16.12
Malaysia Passenger Service & Security Charge (MY) €15.62

Subtotal per passenger £559.48
Number of passengers x1

TOTAL AIRFARE & TAXES £559.48

BFS-KUL

Fare 1: Carrier MH VLST1GB BFS to KUL (rules)
Passenger type ADT, round trip fare, booking code S, V
Covers BHD-LGW (Economy), LHR-KUL (Economy)
£346.00
Fare 2: Carrier MH VLST1GB KUL to BFS (rules)
Passenger type ADT, round trip fare, booking code V, S
Covers KUL-LHR (Economy), LGW-BHD (Economy)
£346.00
(YQ) £210.80
MH YR surcharge (YR) £2.60
MH YQ surcharge (YQ) £6.40
United Kingdom Air Passengers Duty (GB) £94.00
United Kingdom Passenger Service Charge (UB) £29.82
(YQ) £25.55
United Kingdom Passenger Service Charge (UB) £8.60
United Kingdom Passenger Service Charge (UB) £19.77
Malaysia Passenger Service & Security Charge (MY) £13.20

Subtotal per passenger £1,102.74
Number of passengers x1

TOTAL AIRFARE & TAXES £1,102.74

if the fares don't improve then we will fly from Dublin

Not sure which dates you're flying, but you can at the moment fly Dublin-KL for £430 with Turkish Airlines. I consider that a great price. Since you're flying in summer time, high season, prices are unlikely to improve. I would buy ASAP. Dublin Airport is just 1h 40min from Belfast... I know people who have a longer commute to work than that :)

you can at the moment fly Dublin-KL for £430 with Turkish Airlines

(Those prices are for travel end of June, I should add.)

max.mex is that return with turkish airlines ...if so seems a bargain and should be snapped up

flying from b/fast to heathrow is also option and then head from there but prices are rising steadily

Yes, it was return including all taxes and fees (according to Itasoftware), flying out end of June, back 2 weeks later. Seems like a great price to me too, especially for summer travel. It is not impossible you can get even lower if you go through a UK/Irish based broker.

The cheapest I saw from London was £599, but maybe you can do better!

Sorry I did not see that deal myself ....most people tend to use fly scanner and sadly so did I and missed out on this max.mex ...ah well ..least iam booked and outta here !