EU student - Budapest ->London flight - how to get to Norwich?

So I'm flying to London on sept 17. I'll be going to uni in Norwich, the question is how do I get to Norwich from the airport in London? Bus or train? Do you guys know any websites I can buy tickets from?

There are 5 London airports - which one are you going into?

What airport are you flying into?

Liverpool Street is the station where trains go to Norwich. However if you're flying into Stansted, there is a direct train to Norwich from Stansted.

Oh I haven't bought my tickets yet but the two airlines I've been looking at go to London Luton and London Stansted.

So if I fly to London Luton -> I will need to get to Liverpool Street Station -> take a train to Norwich

If I fly to Stansted -> train to Norwich

So I guess I'll be going to Stansted then and it's closer to Norwich anyway.

I've looked at train tickets but apparently you can only buy in advance if you're from the UK and I'm looking at coaches as well

I would agree with Stansted but as alexcs has said its two trains rather than several from Luton.

Thanks guys!

I actually think I'm going to abandon the train idea and go with the coach option. I looked at the National Express website and there's coaches from both Luton and Stansted Airport not only to Norwich but straight to the university I'm going to! So that will save a lot of hassle and I certainly don't want to suffer through different bus stations and take several trains with all my luggage, haha.