Asklemmy

The best advice of keeping moving has already been suggested, but buy a real book, and maybe a crossword or other such like. Avoid technology.

Get a notepad and pen and learn to draw

Get a pack of cards and learn some fake shuffles (via YT) then memorize the 673 King Street trick.

ETA a much better performance.

Uhh, start drinking?

Do you have a library card? Most libraries allow you access to the Libby or Cloud Library or Hoopla apps, you could read a book or listen to an audiobook.

It may sound stupid, but try learning some card tricks or play solitaire with some playing cards?

Do you like Roguelikes? Slay the Spire is really good and it's on Mobile.
It's a port from PC, so no microtransactions or garbage like that, one purchase and done.
There's also Mindustry. It's a mix between Tower Defense and Factory game. This one also has no MTX since it is a Open Source game. Free on Android, 2 Bucks on iOS.

Twist your thumbs

you can't kill an idea

I would say get a hotel room, but it has uh, been 6 hours since you posted this so…

There are very good mobile games without subscriptions, virtual coins, loot boxes and shit. Some examples on iOS:

• Sawblades
• Ollies Arcade
• Knotwords
• High Rise

You could watch The Terminal 9 times back to back, and have just enough time left to be disappointed by some overpriced meal at the Wolfgang Puck.

I wouldn't get wasted, if you're in your 30s that can give your worst headache ever. If the wifi is good enough, maybe start a series? Possibly something with short episodes, a well-selected anime will easily kill something like 10 hours. And if possible, try to get as much sleep as possible

I know you mentioned audiobooks but what about some digital books? Personally, reading makes my eyes tired so I know that, for me, reading something would be a good way to provoke a nap.

As a response to the idea that you may get fatigued by passive media, a book may be a good balance to that. With movies, shows, and audiobooks, you're going to be listening the whole time. It's just constant noise. A book may be more meditative.

Which reminds me, this may be a good time to practice meditation.

Try Monument Valley it's a one time pay puzzle game that moves like an MC Escher sketch.

No advice, but I sympathize. I once sat listening to music while waiting for my flight to board. When there was no activity and fewer passengers in the area than I expected, I discovered that while I had been waiting they changed the gate for my flight. I ended up waiting in Chicago Midway (this was before their big upgrades in the early 00s) for 12 hours. It was hell.

It's not gonna last you 20 hours, but last I checked the official Sonic 1, 2 and CD ports are all free on mobile (and they're really good).

The Lahey link made me laugh way to hard, I've been sick as fuck the last 2 days and I'm laying on the couch watching trailer Park boys with a decent buzz so it's fitting.

Puzzle books? I like to play with variety puzzle books, commonly sold near magazines :3 Crosswords (and varieties thereof), word searches (+varieties), crypto puzzles of various sorts, number puzzles of various sorts, the funky neat ones where some of the words share some letters (like, a letter fills a vertical region to be shared by one or more words), uhhh... oh also I like to write the solutions in Thorass :D https://forgottenrealms.fandom.com/wiki/Thorass_alphabet Though the numerals are garbage. D'ni numerals are far, far better 👍

Also, I daydream for hours at a time. ... But probably you don't or else you wouldn't be asking for ideas I guess 😅

It's a damn shame that you can't go to a pharmacy in the airport, tell this tale, and get some xanex to zonk out and time travel to your destination.

I highly recommend emulating games on your phone. Some of them aren't great without a controller but its worth a shot.

Bloons Tower Defense 6 is a really good game that you could sink time into! It is paid, but I highly recommend it

The most addictive and a complete experience in your pocket kind of game is Crashlands. It's amazing if you're into games where you have to craft things to survive. Definitely recommend giving it a try.