Last October for the 08:00 KGX to York train on a Wednesday I paid £34.30 (First Advance + Dis Railcard). Now it seems the cheapest (same) ticket for the same train appears to be £73.90!
but I'm not expecting much to change re that price.
You open by stating that you have noticed a
large price change over a couple of months, but state that you expect
little change over the next period of a couple of months.
I'm already leaving at silly o'clock as I'm coming from Kent.
You opened the thread by asking for booking advice from London to York, but then you brought up a journey from Kent (though you didn't say where in Kent).
Only at this late stage do you first mention Sittingbourne.
I will say this though, last year I stayed in Edinburgh earlier in the year, and paid over £500 for a four night stay in a hotel. This year I am staying there again (different hotel) for the same four nights, but this time for only ~£119, so even with more expensive York train I am still saving overall on what I shelled out for last year.
What does Edinburgh have to do with your journey to York? Are you travelling to Edinburgh?
Last October for the 08:00 KGX to York train
The aim to is get to York as early as possible in the morning
In the opening post you express a strong preference for the 0800 non-stop service, then again to arrive in York as soon as you possibly can.
But then here you criticise the inability to select a slower train:
eg it won't give me the cheaper York terminators.
Even though this ability is not removed, it is just slightly less convenient, as yorkie went on to explain.
Unfortunately the way you go about asking the question makes it
very difficult to provide helpful advice to you. It's not clear from the start what your priroties are, and unfortunately, there is some contradiction of yourself in your posts.
The best advice is to go to
raileasy.trainsplit.com, input your journey (whatever it is), select your desired class of travel
after the results are generated, and then select 'value' from the options at the top. There may also be a button that says 'intensive search' which you can press if you don't see any good-value options to your liking.
As I say, according to LNER's own website that train leaves KGX with plenty of spare seats.
LNER are focussed on short-run profit maximisation. Their aim is not absolutely to have as many passengers as they can on the train, but to maximise revenue.