Plan a Whole Trip With AI in One Evening — Without Booking Anything That Doesn't Exist

Planning a trip used to eat my evenings: twenty tabs, three half-finished spreadsheets and a nagging feeling I'd missed the one thing worth seeing. Now I do the whole first draft in a single sitting with an AI assistant. It is brilliant at the structure and quietly unreliable on the details, so this guide covers both halves: how to get a usable plan fast, and the checks that stop you turning up at a restaurant that closed two years ago.

This is beginner level — you only need a free account with any of the main assistants and a map app. If you've never used one before, my ChatGPT beginners guide gets you started in ten minutes. And if you aren't sure which assistant to use, the free alternatives to ChatGPT I actually use are all fine for this.

Why AI is good at this, and where it falls over

Trip planning is mostly sorting: which days, which areas, what order, what to skip. That is exactly what an assistant does well. Ask it to group sights by neighbourhood so you aren't crossing a city three times in a day, and it will give you a sensible shape in seconds.

What it does badly is anything that changes: opening hours, prices, which museum is closed on Mondays, whether a ferry still runs in October. It will state those with total confidence and sometimes be wrong. So the rule for the whole guide is simple: let the AI shape the trip, and verify every fact you'll actually rely on.

Step 1: Give it the brief, not just a destination

"Plan me three days in Lisbon" gets you the same generic list everyone else gets. Instead, spend two minutes on a proper brief. I paste in something like this:

• Who and when: two adults, three nights, mid-November.
• Pace: two things a day at most, with a long lunch.
• What we like and hate: food markets and viewpoints, no queues for big attractions, no guided tours.
• Hard limits: a budget per day, no car, one of us dislikes steep hills.

The hates and hard limits do the most work. They are what turn a brochure into a plan that fits you.

Step 2: Ask for options, then choose

Before any itinerary, ask for the shape: "Suggest three different ways to spend three days here, each with a one-line theme." One might be food-led, another history-led, another relaxed with a day trip. Pick one and say why. This stops the assistant locking in the first idea it had and gives you a say in the trip before it writes anything long.

Step 3: Build the itinerary by area

Now ask for a day-by-day plan, and add one instruction that improves almost every result: "Group each day by neighbourhood and tell me roughly how long it takes to walk or travel between stops." That keeps the days geographically sane. Ask for a morning, afternoon and evening slot, plus one backup idea per day for rain.

Step 4: Make it show its uncertainty

This is the step that separates a useful plan from a risky one. Follow up with: "List every place, price and opening time in that plan that you are not certain about, and tell me where I'd check each one."

It will often flag a handful of things it had stated flatly a minute earlier. It isn't a guarantee, because it can still be confidently wrong, but it points your checking at the weakest spots first.

Step 5: Check the facts in a second place

Take the shortlist of places and check each against something that isn't the assistant. My routine takes about fifteen minutes:

1. Search every named place in Google Maps. Does it exist, is it open, and are recent reviews recent? A place with no reviews this year is a warning.
2. Open the official website for anything you'd book. Check hours, closed days and ticket prices there, not in the chat.
3. Check transport in the operator's own app or timetable. Seasonal ferries and last trains are where plans quietly break.
4. Cross-check the odd one with a search tool. Perplexity shows its sources, which makes it good for a quick "is this still true?" question.

If you browse with an AI sidebar, it can help with the comparing. Setting up Perplexity Comet is one way to have an assistant read the venue's page next to your itinerary, though the checking is still yours.

Step 6: Turn the plan into something you'll use on the day

A chat transcript is a poor travel document. Ask the assistant to convert the checked plan into a clean list for each day, with addresses, opening times you've confirmed and the booking status of each item. Paste that into your notes app, and save the key places to a Google Maps list so they show up on your phone map. Download offline maps and the confirmation emails before you leave, because roaming signal is never as reliable as the plan assumes.

Common mistakes worth avoiding

1. Treating the first answer as final. Ask for options and push back; the second draft is nearly always better.
2. Packing the days. AI plans love squeezing in six sights a day. Cut it by a third.
3. Trusting prices and hours. Check them at the source, every time.
4. Letting it book for you. Use it to decide, then pay on the real site yourself.
5. Pasting in private details. Leave passport numbers, booking references and your home address out of the chat.

If you're newer to all of this and want a structured way in, my course Your First 30 Days With AI starts with the basics and the first two modules are free. For more of the tools I rely on, the AI tools hub collects every guide and article in one place.

Questions people actually ask

Which AI is best for planning a trip?

Any of the big three chat assistants (ChatGPT, Claude or Gemini) will write a perfectly good itinerary, so the choice matters less than the checking. I use whichever one I already have open for the draft, and a search-based tool such as Perplexity or Google Maps for confirming facts, because those show their sources.

Can AI book flights and hotels for me?

Some assistants and AI browsers can now fill in booking forms, but I would not let one pay for anything unattended. Use AI to decide what to book and in what order, then make the actual booking yourself on the airline, hotel or rail site.

How do I stop AI making up hotels and opening times?

Treat every named place, price and opening time as a claim to check, not a fact. Paste the AI's list into Google Maps or the venue's own website, and ask the assistant to flag anything it is unsure about. Anything you cannot find in a second place comes off the plan.

Is it safe to give an AI my travel dates and plans?

For ordinary holidays, sharing destinations and rough dates is low risk, but keep passport numbers, booking references and your home address out of the chat. If you want a clean slate, use a temporary or incognito chat.

Is AI trip planning free?

Yes, you can do everything in this guide with free accounts. Paid plans mostly give you longer conversations and faster replies, which is nice for a big multi-city trip but not necessary for a long weekend.