Usually flights come first, but at space-constrained airports and over peak periods it is worth checking parking availability before you commit to dates.
Almost nobody does this, and on a handful of trips it would have saved them a problem they did not know existed.
Why does the order normally not matter?
Because parking is almost always available somewhere. At most UK airports on most dates, you will find a space — the question is how much you pay and how far out it is.
That makes flights the sensible first decision. They are the expensive, inflexible part of the trip, and parking adapts around them.
For a weekend in February from a mid-sized airport, book the flights and sort the parking afterwards. Nothing about that will go wrong.
When should parking influence the dates?
Three situations, and they are more common than they sound:
Space-constrained airports — Bristol is the clearest example, where car parks sell out rather than simply getting dearer
Peak periods — the Christmas fortnight in particular, where the closer car parks are gone by late November
Specific requirements — a van or roof box that needs an open-air site, or accessible transfer needs
At most airports, late booking costs money. At a few, it costs you the option entirely, and that is worth knowing before you fix your dates.
What does checking first actually involve?
Two minutes, before you pay for flights. Open the parking comparison for the dates you are considering and see what exists.
You are not booking anything. You are checking that something sensible is available and roughly what it costs, so the number is in your head when you price the trip.
If your dates are flexible by a day either side, that two minutes occasionally changes which flight you choose — usually away from a Saturday and towards a midweek departure, which helps on both fronts.
Which airports are worth checking first?
Smaller sites with strong demand. Bristol is the standout, where capacity binds before price does.
Exeter, Leeds Bradford and other compact airports behave similarly on a smaller scale — fewer spaces means availability runs out sooner than the quiet terminal suggests.
At Heathrow or Manchester, large independent markets mean there is nearly always something. The price rises, but the option exists.
Can I book parking before flights are confirmed?
Yes, on a flexible rate, and it is sometimes the right call. A cancellable booking can be moved or cancelled within the stated window.
That lets you secure a space over a peak period while flight details firm up. The premium is small against finding nothing available in December.
What you should not do is book a non-flexible rate speculatively. If the flights change you lose the whole amount, which defeats the purpose.
What about package holidays?
The dates are fixed by the operator, so parking follows. There is nothing to optimise about the departure day.
What you can still do is book the parking as soon as the holiday is confirmed, rather than waiting until closer to travel. Package holidays run on Saturday changeovers, which is the busiest departure day of the week year-round.
Does this apply to return flights too?
Occasionally, and it is the part people never check. A late-night return into a car park with a thin evening shuttle is a worse experience than the outbound suggested.
If you have a choice between two return flights, the one landing at nine rather than midnight is worth something — in shuttle frequency, in daylight, and in not standing at a stop in January.
What if you are driving a long way to the airport?
Then the parking decision and the flight decision are genuinely linked, and it is worth thinking about them together.
A four-hour drive to a 6am departure means leaving home at one in the morning, which most people will not do. The realistic options are a hotel with parking the night before, or a later flight.
That is a case where checking parking and hotel-with-parking packages before booking the flight changes which flight you choose. The cheapest fare at dawn stops being cheap once a room is added to it.
Does it matter for short breaks?
Less, because the parking cost is a smaller share of a short trip. Two nights of parking rarely changes which flight makes sense.
The exception is a city break over a bank holiday weekend, where availability tightens sharply across three days. On those dates it is worth the same two-minute check.
A practical approach
For ordinary trips, book flights first and parking within the same week
For Christmas or a space-constrained airport, check parking availability before fixing dates
Use a flexible rate if you want to secure parking before flights are certain
Prefer midweek departures where your dates allow, which helps both bookings
Check the return time as well as the departure
Compare what is actually available for your candidate dates at Birmingham, Stansted or your own airport before committing. Two minutes now is cheaper than a problem in December.