I think its reasonable/ average price. Even AA with layover will cost you ard RM2,300 (exclusive baggage, lunch etc).

I did, but mine was to Tokyo from Kul. They don't have Sales often, but even if they do, the price difference is approximately RM200-300 difference per pax. Its not as low as to go half price.

When I bought my tix, it was under JAL but the flight from KL to Tokyo was operated by MAS. So i flew with MAS to Tokyo, and return by JAL flight. Don't be surprised if this happens.

Why transit at Tokyo? Where are you flying to...? Thought you're going Tokyo right? lol

Haneda and Narita are in different area, it's not like KLIA and KLIA2.  It will take approximately 1.5 hours to get from either one to the other. You can take the Narita Skyaccess, 1 train every 40min. So you need to estimate 3-3.5 hours for the transit.

Optionally, you can also take the airport bus to transfer.
https://www.limousinebus.co.jp/en/bus_servi...eda/narita.html

I'm not too sure about your luggage but since its 2 different airport, its very likely that you have to collect your luggage then check-in again in Haneda and drop your luggage with them. But do more research, perhaps there's an option to transfer your luggage directly without the need of you collecting it at Narita.

I did the JAL flight from KUL-CTS via NRT/HND last year. Yes, you will need to collect your luggage and pay 3000JPY to transit from NRT to HND on your own expenses.

Rather unfortunate that they didn't offer direct flight to HND instead, as the connection time in NRT to CTS is quite terrible. Otherwise, I think they are one of the best airlines out there.