Lounge at Madrid Airport
 

I understand the T4S Lounge is open 24 hours. If I’m travelling from T4 will I be able to access it ?

No, unless you are connecting from a non-Schengen flight arriving into T4S and departing on a non-Schengen flight departing T4 (UK, Ireland & Croatia essentially).

Thanks. Thought that might be the case.

Going to the Champions League final and can’t find accommodation so was going to crash in the lounge.

I suppose it's worth a try, now that there are automated gates (and therefore you're not asked for a boarding pass any longer at immigration) - though they might be turned off, or the lounge might not admit you.

I believe the Priority Pass lounge in T4S is also 24 hours though, if you have access.

Otherwise, maybe worth changing your flight to a BA operated one (first one around 10:55)?

Over Champion's League weekend the BA flight will probably be as pricey as the accom the OP doesn't want to pay !

If you are flying IB from T4 you won't be allowed into T4S.

Madrid has a lot of hotel space. I would have thought that 65,000 football fans would be a drop in the bucket compared to some of the massive trade fairs that Madrid hosts. I suspect that rooms will open up as people start releasing room reservations. (Barcelona and Ajax supporters might have logically booked something last weekend...)

On checking 1st June overnight stay - airport rooms + £1000 a night, and ropey hostels over £600

I'm not suggesting booking today. I'm suggesting checking hotels again the week before the match. Rates will drop once hotels know they aren't selling out...

But if it's truly that bad then you could book the cheapest one-way T4S flight you can find, or use Avios... Morocco or somewhere... go to the T4S lounge and then head back to T4 for your actual flight.

I might be able to put you up on a couch in the center.

I'd say just stay out. Spain runs super late on a Sat night anyway and you may as well just spend the money on nice food.

Or..... (real wildcard thinking here)

Just buy a tent from a local camping shop and sleep in a park in your disposable tent. Then, next day, pack it up, and go find a rough sleeper and offer them your tent for free.

No, this definitely doesn't work - the ladies at the security/transfer desk in T4S won't allow you through with a T4 departing BP - I've tried.

So I'm amazed that richardwft managed - maybe the route from T4-T4S isn't so closely monitored...

There's a passport check immediately after the lifts up from the link train. Can't remember if it's also a BP check.

Of course, it's not for everyone, but this is exactly what I'd do if the prices for hotels remain ridiculous.

You won't have any trouble at all finding places in Madrid that stay open all night. If Liverpool win :p, start at Triskel Tavern near Metro Tribunal and go from there, as most of the regulars will be in the mood for an all-night celebration. It's usually open until well after 3, if memory serves.