We have planned trips to 21 countries from our kitchen table in Rovaniemi, and over the past two years we have handed more and more of that planning work to AI. First just ChatGPT, then Gemini when it launched its travel-specific features, and now both — depending on what we need that day.

This post is not a tech review. It is a traveller’s field report from people who use these tools on real trips, not on benchmark tests. We will tell you exactly where each tool earned its place in our workflow and where it let us down.

What Google Gemini and ChatGPT actually do for travellers

Before we get into comparisons, it helps to understand the architecture. These are not the same kind of tool, even though both answer questions in a chat window.

What ChatGPT brings to trip planning

ChatGPT (specifically GPT-4o in the paid tier) is a large language model with optional web browsing, a code interpreter, and file uploads. Its trip-planning strength is synthesis and structure. Give it a mess of requirements — six cities, mixed travel styles, a budget cap, two vegetarians, one person who hates museums — and it will build you a coherent, sequenced plan that a human travel agent would charge several hundred euros for.

• Itinerary logic: handles multi-city routing, travel days, buffer time, and opening-hours conflicts better than any other tool we have tested.
• Customisation: genuinely absorbs your preferences across a long conversation and adjusts every recommendation accordingly.
• Document handling: upload your hotel confirmation, ferry schedule, and visa requirements — it reads them together and flags conflicts.
• Consistency: does not change its position on a recommendation without a reason, which matters when you are building a complex trip over multiple sessions.

What Google Gemini brings to trip planning

Gemini (Advanced / 1.5 Pro) is Google’s answer, and its core advantage is live information and ecosystem integration. Because it sits inside Google’s infrastructure, it can pull real-time search results, connect to Google Flights and Maps, and access your Gmail or Calendar if you allow it.

• Live prices: can surface current flight prices and hotel availability through Google’s data — ChatGPT can browse, but Gemini’s sourcing is faster and more reliable for price lookups.
• Maps integration: “show me this route on Google Maps” is a Gemini-native action. ChatGPT has to link out.
• Recent events: for anything that changed in the last few weeks — new visa rules, transport strikes, opening dates — Gemini’s search-grounded answers are more accurate.
• Gmail / Calendar: in the Gemini Advanced workspace, it can read your existing bookings from your inbox and add events to your calendar. We use this a lot.

Head-to-head: the travel planning tasks that matter most

We ran both tools through the same set of real tasks we use when planning our own trips. Here is what happened.

Task 01 — Build a 7-day Iceland itinerary with a budget cap

Task 02 — Find flights from Helsinki to Singapore under €600 in July

Task 03 — Write a family packing list for Lapland in February

Task 04 — Check if a Baltic ferry route runs in summer 2026

Task 05 — Rewrite a rough trip plan into a shareable travel document

Quick-reference comparison: Gemini vs ChatGPT for travel

Use this table as a quick decision guide. We update it when either tool releases a major feature change.

When to use Gemini — and when to reach for ChatGPT

After two years of using both tools on real trips, here is the decision tree we actually follow.

Reach for Gemini when you need:

• Current prices: flights, hotels, attraction tickets — anything where the number might have changed in the last month.
• Recent news: new border rules, transport strikes, seasonal closures, festival dates for 2026 specifically.
• Google ecosystem shortcuts: adding a flight to your calendar, pulling hotel confirmations from Gmail, opening a route in Maps.
• Quick single-question lookups: “Is the Uffizi closed on Mondays?” — Gemini with search is faster here.
• Connecting services you already use: if your life runs in Google Workspace, Gemini integrates more cleanly.

Reach for ChatGPT when you need:

• A full itinerary: multi-day, multi-city, with real travel logic and contingency planning.
• Document synthesis: paste in your bookings, tickets, visa rules and ask for a unified travel plan.
• Personalised depth: once you have built up a conversation with your preferences, ChatGPT holds context better over long sessions.
• Creative problem-solving: “our Lofoten ferry got cancelled and we have 36 hours — what do we do?” — ChatGPT’s lateral reasoning is better here.
• Writing and formatting output: shareable trip summaries, packing checklists, blog notes, budget spreadsheets in plain text.

The deeper differences most comparison posts miss

Most “Gemini vs ChatGPT” articles compare features. We want to talk about something more useful: the feel of working with each tool over time.

Hallucination patterns differ

Both tools make things up. Gemini tends to hallucinate on specific local details — opening hours, exact addresses, phone numbers — even when it claims to have searched. ChatGPT tends to hallucinate on recent events and may confidently give you last year’s ferry schedule as if it were current. The practical fix: use Gemini to verify recency, use a direct source to verify specifics.

Context window behaviour

ChatGPT 4o handles a very long conversation without losing earlier details. We have planned a 14-country itinerary in a single session and it remembered constraints from message three when answering message forty-seven. Gemini sometimes drops early context in long sessions — we have found it useful to paste a “trip summary so far” paragraph back in every few exchanges.

The free tier difference

If you are using the free version of either tool, the calculus changes. Free ChatGPT (GPT-3.5) is noticeably weaker at itinerary logic. Free Gemini still connects to Google Search. For budget-conscious travellers on the free tier, Gemini may actually be the stronger starting point.

Mobile usability

Both have strong apps. Gemini has a slight edge for on-trip use because voice queries work well and it connects to your phone’s Google services. ChatGPT’s app is excellent for reading back a saved itinerary offline. We keep both on the home screen.

Mistakes we made switching between Gemini and ChatGPT

• Trusting Gemini for driving distances in rural Iceland. It pulled a figure from an old cached page that was 40 km short. Always verify distances in Google Maps directly, not via Gemini.
• Using ChatGPT to check current visa rules. We nearly missed an updated entry requirement for a Schengen transit because ChatGPT’s training data predated the policy change. Use Gemini or an official government source for anything visa-related.
• Starting the itinerary in Gemini and then switching to ChatGPT. The context did not transfer cleanly. Either build your full plan in one tool or write a crisp summary to paste across.
• Assuming the free tier is good enough for complex trips. It sometimes is and sometimes produces a plan with logical errors (overnight train departing three hours before arrival — yes, that happened). For a two-week international trip, the paid tier is worth it.
• Forgetting to tell ChatGPT to be conservative on opening hours. It defaults to confident. Asking it to “flag anything it is less than 80% sure about” produces much more honest output.
• Treating one answer as final. We always run at least two passes: a first draft from whichever tool built the itinerary, then a critique pass asking “what is wrong with this plan?” The second pass catches most of the errors.

Frequently asked questions

A final word from Rovaniemi

We started testing AI travel tools because we needed them — planning 21 countries of travel from a city above the Arctic Circle means you can’t always rely on local knowledge or friends who have been there. We had to build the knowledge ourselves, and increasingly AI has been part of that process.

What surprises us is not how smart these tools are. It is how differently they fail. Once you understand the failure modes — Gemini’s local-detail hallucinations, ChatGPT’s recency gap — you can work around them and get genuinely useful output for real trips.

Neither tool replaces the moment you arrive in a place and it is nothing like the plan. But both of them make that plan a lot better than we used to build on our own.

We will keep updating this comparison as both tools evolve. If something here is out of date, the comment section is below — we read everything.