without knowing where you're travelling from and what your plans are / were, but...
i understand flights have started again, although today's issues could balls up tomorrow's operations.
there's a lot of car parking at and around luton airport (there's a few car parks far enough away to have shuttle bus services) even if one car park is buggered.
if you're travelling from london, there's coaches (national express or green line - both from victoria but the latter's across the road from the coach station) that pretty much run 24/7 and go to the bus station just outside the airport terminal. green line said they were back in to the bus station about lunch time today.
thameslink trains also have a 24/7 service, connecting at luton airport parkway for the 'DART' (monorail sort of thing - costs extra) to the airport. the latter is currently reporting that it - and all flights - are currently suspended, which may be out of date. there are ordinary buses about every 10 minutes daytime (and less frequent 24/7) from luton station interchange and a short walk from parkway station.
can go in to more detail if any of this is any use to you.