Plan a trip in six steps: choose where and when, set the length, book in the right order, plan each day, then run the practical checks. Start about three months out for an international trip, book flights first, and keep each day to four sights in one area. The destination decides the budget: a day for two runs from $147 in Thailand to $854 in Switzerland.
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Plan a trip →- Where and when sets most of the cost, and the dates decide what is open.
- Longer trips cost less per day: $414 a day for 3 days, $322 for 14.
- Book flights first, about 89 days out for international and 39 for domestic, per Google's 2026 data for U.S. departures.
- Four sights a day, grouped by area, with a light arrival day.
- Fifteen practical questions catch what plans miss, from entry papers to the leaving day.
Step 1: Choose where you go, with the daily cost in view
The destination is the biggest cost decision you make. Across 140 AI-planned trips in 56 countries, pulled from the Travel Cost Index on October 3, 2026, the median day for two cost $365 with flights from home excluded, and the priciest country cost 5.8 times the cheapest.
Median cost per day for two, flights from home excluded. AI-modeled estimates from 140 itineraries, not booked spend; countries with 3 or more trips.
The data · 13 rows
| Country | Trips | A day for two |
|---|---|---|
| Thailand | 4 | $147 |
| Portugal | 5 | $260 |
| Spain | 7 | $273 |
| Italy | 11 | $288 |
| Greece | 4 | $310 |
| Japan | 4 | $388 |
| United States | 27 | $397 |
| France | 3 | $404 |
| Ireland | 4 | $420 |
| United Kingdom | 5 | $448 |
| Austria | 4 | $461 |
| Iceland | 5 | $801 |
| Switzerland | 3 | $854 |
Pick two or three places, price a day in each, and let the budget cut the list. Where the money goes is steady: accommodation and food each take a median 31% of a trip, activities 25% and local transport 10%.
Step 2: Choose when, and check what is shut
The dates decide the weather, the crowds and what is open. Many museums close one day a week, often Monday, and public holidays shut some sights and pack others. Check every must-see against its own website for your exact dates before you build a day around it.
On the Oh-No Travel Index test, one planner sent a couple to Tsukiji Outer Market on a Sunday, when many of its shops close; another put Shinjuku Gyoen on a Monday, when it is shut; and ours put Tsukiji at 4:30 PM, after the stalls close.
Step 3: Set the length
Longer trips cost less per day. In the same 140 trips, the median day for two fell from $414 on a 3-day trip to $322 on a 14-day trip. Each length mixes different countries, so part of the gap is where people went, not how long they stayed.
| Trip length | Trips | Median a day for two | Median trip total |
|---|---|---|---|
| 3 days | 22 | $414 | $1,241 |
| 4 days | 11 | $427 | $1,709 |
| 5 days | 17 | $420 | $2,102 |
| 7 days | 43 | $328 | $2,296 |
| 10 days | 34 | $324 | $3,242 |
| 14 days | 9 | $322 | $4,514 |
Count travel days honestly: a long-haul arrival day holds one easy stop at most, and the last day belongs to the airport.
Step 4: Book in the right order
Book flights first. Google's 2026 flight data for U.S. departures put the cheapest domestic fares about 39 days before departure and international fares about 89 days before (Google, October 5, 2026).
| When | What to do |
|---|---|
| About 3 months out | Check entry rules and passport validity; book international flights |
| 1 to 2 months out | Book domestic flights, the first and last hotel nights, and timed-entry sights that sell out |
| 2 weeks out | Sort the transit card, a SIM or eSIM, cash, and the route from the airport |
| The day before | Recheck closures, the weather and when to leave for the airport |
Some sights sell no tickets at the door: teamLab Planets in Tokyo sells timed tickets online only, and the Ghibli Museum is by advance reservation only. Check every must-see for this before you build a day around it.
Step 5: Plan each day
Plan each day as one area with at most four sights at a comfortable pace, not counting meals. Put the stops in walking order, check each one is open at the hour you arrive, and never send a day across the city and back.
In 356 AI-planned itineraries, 43% of days carried at least one checkable fault, such as a closed stop or a doubled-back route, before correction.
Keep the arrival day light and plan the leaving day around the flight, not around one more sight.
Step 6: Run the practical checks
Run the 15 checks of the Oh-No Travel Index before you go: entry papers, the airport route, where to stay, the transit card, a rail pass, cash or card, a SIM, etiquette, what to book ahead, closures, weather and packing, scams, a day trip, the must-see sights and the leaving day.
On a 7-day Tokyo brief in October 2026, eleven AI planners, ours included, left between 2 and 12 of those questions unanswered.
A packing list generator sorts the bag for your destination and month, and a free itinerary template holds the bookings if you plan by hand.
See what MonkeyEatingMango plans for you
Disclosure: MonkeyEatingMango is the product behind this blog.
MonkeyEatingMango does step 5 for you: answer 8 questions and it returns a dated plan with a time and a cost on every stop, free to read; downloads cost $0.99 per trip. On the Tokyo test it scored 4 of 20, lower is better, with one stop after closing and a day that doubles back, so the checks in step 6 still apply. The 7-day Japan itinerary shows a finished plan.
Last updated October 2026.
Written by Shobhit Shrivastava · Founder
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