Guide · Itineraries

AI Itineraries, Done Right: Prompts, Tools and a Verification Checklist

AI drafts a week of travel in seconds — and confidently invents the café that closed in 2019. Here is how to get the good parts and catch the bad ones.

NFBy Nora Feld, Founding Editor · Reviewed by Diego Costa, Aviation Analyst · Fact-checked Sep 2026 · Last updated Sep 16, 2026

Why verification is not optional

The evidence is unambiguous. An academic framework paper from October 2025 found that LLM-generated itineraries "often lack temporal and spatial feasibility" — stops that don't fit in a day, distances that don't work[1]. Tourism researchers describe AI hallucinations as "plausible yet false" outputs[2], and CNN's test of ChatGPT city guides documented concrete errors in the real world[3]. The pattern in every test: the prose is smooth, the facts are sometimes fiction.

The tools for the job

Three general assistants cover most itinerary work. ChatGPT is the drafting workhorse — free tier included. Gemini added vacation planning across Search, Maps and the Gemini app in March 2025[4], and Google expanded its "Personal Intelligence" features to free users in March 2026[5]. Perplexity works like an answer engine with citations, and has pulled Tripadvisor hotel data into its answers since January 2025[6] — handy when you want sources next to every suggestion. Dedicated planners (see our planners guide) add maps and booking, at the cost of a learning curve.

Prompt templates that work

Garbage prompts make garbage trips. The three that consistently produce usable plans:

Base plan"Plan a 7-day trip to [city] for [two adults] arriving [date]. Budget: [€120/day] excluding flights. I like [food markets, walking, small museums]; I dislike [malls, nightlife]. Group each day by neighborhood, give realistic travel times between stops, and mark anything that needs a booking in advance."
Reality check"Review this itinerary for feasibility: [paste plan]. Flag stops that are too far apart, days that are overpacked, places that might be closed on those days, and anything you are not certain exists. Be specific."
Alternatives"Give me 5 restaurants near [hotel area] open on [Monday evening], in [€15–30] price range, with a one-line reason each. Exclude chains."

The 30-second verification checklist

Run every AI-generated stop through this before it goes in your calendar:

Search the exact name

If the first result isn't the venue's own site or an official listing, it may not exist as described.

Check hours on the official site

AI opening hours are frequently stale or invented — the official page wins every time.

Map the distance

Two "nearby" stops can be 40 minutes apart. Verify with a maps app, not the itinerary's word.

Confirm advance bookings

Popular museums and restaurants need tickets weeks out. If the plan doesn't mention it, check anyway.

Leave 20% slack

Plans that fill every minute break on day one. Cut the weakest stop and keep the slack.

Sample structures: Japan & Europe

Two structures that survive verification, to adapt rather than copy — specifics change with the season, so regenerate and verify with current data:

Japan — 7 days (Tokyo → Kyoto → Osaka)

  • Days 1–3 Tokyo: one neighborhood per day (Asakusa, Shibuya/Harajuku, Shinjuku), with one booked experience each (teamLab, sumo, or a food tour).
  • Days 4–5 Kyoto: temples early (before tour buses), Nishiki Market for lunch, one evening in Gion.
  • Days 6–7 Osaka: Dotonbori food crawl plus a half-day trip to Nara or Himeji.

Europe — 10 days (Rome → Florence → Venice)

  • Rome 4 days: Vatican and Colosseum with pre-booked tickets; Trastevere evenings.
  • Florence 3 days: Uffizi + Duomo booked ahead; one half-day to Fiesole.
  • Venice 3 days: St. Mark's early, one island day (Murano/Burano), leave time to get lost — intentionally.
Keep in mind

These are structural examples, not reservations. Opening hours, ticket windows and closures change — verify every entry before booking anything around it.

Frequently asked questions

Is ChatGPT good at planning trips?+
Genuinely useful for drafts and ideas — and genuinely capable of inventing venues. Academic work finds AI itineraries often lack temporal and spatial feasibility[1], and press tests have documented errors[3]. Treat output as a strong first draft.
Do AI itineraries have mistakes?+
Yes, routinely — researchers call AI hallucinations "plausible yet false"[2]. The five-step verification checklist above catches most of them in minutes.
ChatGPT vs Gemini for travel planning?+
Both draft solid itineraries. Gemini is woven into Google Search, Maps and the Gemini app for vacation planning[4], which makes follow-up lookups faster; ChatGPT has booking connectors to Expedia and Booking.com. Verify either one's output the same way.
Can ChatGPT book flights and hotels?+
Indirectly — since October 2025, ChatGPT integrates Booking.com and Expedia apps that open booking flows[7]. ChatGPT holds no inventory itself; the booking happens on the partner platform, where you should read the terms.
Is there an AI itinerary generator for Europe?+
Yes — the prompt templates above work for any region, and planners like Layla or Wonderplan handle Europe well. Rail passes, city taxes and seasonal closures are exactly what AI gets wrong, so verify those specifically.

Sources

All claims verified September 2026.

  1. Iti-Validator — guardrail framework for LLM itineraries, arXiv:2510.24719 (Oct 2025): arxiv.org
  2. AI Hallucinations in Tourism, Journal of Consumer Behaviour (Wiley, 2025): onlinelibrary.wiley.com
  3. CNN — ChatGPT city-guide error test: cnn.com
  4. TechCrunch — Google vacation-planning features (Mar 27, 2025): techcrunch.com
  5. SiliconANGLE — Google Personal Intelligence free tier (Mar 17, 2026): siliconangle.com
  6. The Verge — Perplexity/Tripadvisor integration (Jan 9, 2025): theverge.com
  7. OpenAI Access Connectors — Booking.com & Expedia in ChatGPT (Oct 2025): tom.travel