Seat 34B, No Wi-Fi: An Hour-by-Hour Flight Log With an Offline AI

Every frequent flyer knows the moment. The cabin door closes, the safety video starts, and your phone shows the little airplane icon. Your inbox, group chats and every cloud app on your laptop go quiet.

Most AI chatbots stop working right then too. ChatGPT, Gemini and the others run in a data center, so without a connection they can’t answer, or they sit there spinning, waiting for in-flight Wi-Fi that costs $28 and drops whenever you cross a cloud.

An AI that runs entirely on your own computer doesn’t care. The model is a file on your hard drive, and your laptop does the thinking. It works at 35,000 feet the same way it works at your kitchen table.

So here’s what a five-hour flight looks like with one along. Pick a seat. We’ll take 34B: the middle one, where you need all the entertainment you can get.

0:00 — Wheels up

Before boarding, do one thing: open the app and send it a test message while you’re still at the gate. If it answers, you’re set. Everything it needs is already on your laptop, so turning on airplane mode changes nothing.

(If you’re using an app for the first time, download the model at home, not on airport Wi-Fi. Model files are a few gigabytes, and the airport connection is not up to it.)

Seatbelt sign on. Tray table up. Let’s go.

0:30 — The wedding toast you’ve been avoiding

You’re flying to your cousin’s wedding. You agreed to give a toast three months ago. The wedding is tomorrow. You have written nothing.

This is the perfect job for an offline AI, and not only because you’re stuck in a metal tube with time to kill. A good toast is full of personal details: the camping trip where the tent collapsed, the ex nobody mentions, the fact that the groom cried at Paddington 2. Those details stay on your laptop and never reach anyone’s server.

Try: “Help me write a 2-minute wedding toast for my cousin Jess and her husband Marco. Funny but warm. Include the story about the camping trip where the tent collapsed on them in the rain. End with a sincere line about how they take care of each other.”

Then keep going: “Make the opening punchier.” “Cut the middle part, it drags.” “Give me three different closing lines.” You have three hours left. Use them.

1:15 — The armrest dispute

Your neighbor in 34A, who has kindly agreed to be part of this, believes the middle seat gets both armrests. The person in 34C is unconvinced.

Have the AI settle it in the format the moment calls for.

Try: “Write a formal ruling, in the style of a supreme court opinion, on who gets the armrests in a row of three airplane seats. Include a dissent from the aisle seat.”

The ruling: the middle seat gets both, because the window seat has the wall and the view and the aisle seat can stretch a leg out. The dissent mentions “the tyranny of the elbow.” Everyone is satisfied, or at least entertained.

2:00 — Planning the trip you’re actually on

You land in a city you’ve never visited, with one free afternoon before the rehearsal dinner. Ask your AI for ideas.

Try: “I have one free afternoon in Lisbon, from about 1pm to 6pm. I like food, views, and walking, but not museums. Give me a loose plan with a backup if it rains.”

A local AI is a good brainstorming partner here, but one honest caveat: it doesn’t browse the web. It knows what it learned during training, not today’s opening hours, ticket prices, or the hot new restaurant that opened last month. Use it for the shape of the afternoon, then check the details once you land and get a signal. (This is true of cloud chatbots without web access too. We wrote more about what local models know and don’t.)

2:45 — The drinks cart and the trivia round

The cart arrives. So does a lull. Time for a quiz.

Try: “Write 10 trivia questions about aviation history, getting harder as they go. Put the answers at the bottom so I don’t see them.”

Quiz 34A. Quiz 34C. Quiz the flight attendant if they’re not busy. (They’re busy.)

A fair warning, the same one we give for any AI trivia: models can occasionally be confidently wrong. If an answer sounds too good to be true, call it a debate rather than a ruling.

3:30 — The email you’ll be glad you didn’t send

Somewhere over the ocean, you remember the tense work email waiting for you on Monday. Your first draft is mostly capital letters.

Paste it in and ask for help. This is where a private AI earns its keep: the email names your boss, your client and the project that’s going badly, and none of that leaves your laptop. (Here’s why that matters more than people think.)

Try: “Here’s an email I wrote while frustrated. Rewrite it so it’s calm and professional but still clearly says the deadline isn’t realistic. Keep it under 150 words.”

Save the draft. Send it on Monday, when you’re calmer and back online.

4:15 — Bedtime story for the row behind you

The toddler in 35B has run out of snacks and patience. Their parent looks over at your laptop with the face of someone who has tried everything.

Try: “Write a gentle three-minute story about a small airplane named Pip who is nervous about flying over the ocean for the first time, and the friendly clouds who help him. End with Pip landing safely and falling asleep in the hangar.”

You’ve made a friend for life. Possibly two.

5:00 — Landing

Tray tables up. Your toast is done, the armrest case is closed, you have a plan for Lisbon and a calmer email to send. You never paid for Wi-Fi, and your conversations never left seat 34B.

The honest part: battery and laptops

Running an AI model on your laptop is real work for the computer, and it’s a good idea to know the trade-offs before you fly:

• It uses battery. Each answer gives your processor a short workout. Light use (a toast, some trivia) is fine. Five straight hours of long stories will drain you faster than watching a movie. Charge before you board, and plug in if your seat has an outlet.
• Smaller models are lighter. If battery is a concern, a smaller model answers faster and uses less power. For toasts and trivia, you won’t notice a difference in quality. Our guide to choosing a model explains the options.
• You don’t need a supercomputer. Most laptops from the last few years can do this comfortably. If you’re not sure about yours, here’s what you actually need.

Pack it before your next trip

WorkInPrivate runs open-source AI models entirely on the computer you already own. Set it up at home once, and it works anywhere: on planes, in cabins, on trains through tunnels, and in hotels with Wi-Fi that charges by the hour. There are no accounts, no subscriptions, and no record of your chats on someone else’s server.

Grab the free trial before your next flight. The person in 34A will thank you, at least after the armrest ruling.