Alternative dates: how the date changes cost and CO2

The date of a meeting changes its travel cost, its CO2 and sometimes even which location is best. Fares, hotel rates and connections move with demand, holidays and trade fairs, so the same city can be a good choice one week and an expensive one the next. Comparing up to three dates for the same event, door to door, lets you pick the best combination of place and time instead of fixing one and hoping for the other.

Most planners treat the date as given and optimise the location around it. Usually the date is more flexible than it looks: often any week in a month works, as long as the key people can attend. That flexibility is worth money.

Why the meeting date changes cost and CO2

Three things move with the date.

Fares. Flight prices respond to demand on each route and day. The days when business travellers commute, the start and end of school holidays and long weekends are typical peaks. Rail fares with dynamic pricing behave similarly, and seats on popular trains run out.

Hotels. Room rates and availability depend on what else is happening in the city. A large trade fair, a congress or a major sports event can fill the hotels and push rates far above normal. If rooms near the venue are gone, attendees spread across the city and need transfers, or arrive a day earlier.

Connections. Timetables are not the same every week. Rail engineering works can close a direct line, a seasonal flight may not run yet, and the annual rail timetable change in December can add or remove connections. When a direct train disappears, some attendees switch to flying, and a flight with a change via a hub covers more distance than a direct one. That is how the date reaches the CO2 figure, not only the cost.

The date can change the best location

This is the part most often missed. Because every city reacts to its own events and connections, the ranking of candidate cities is not stable across dates.

Take a hypothetical partner conference with 150 attendees from nine countries and three possible weeks in spring. In the first week, the city that leads on travel cost hosts a large trade fair: hotel rooms are scarce and expensive, and the second-ranked city moves ahead. In the second week, Easter holidays in several origin countries raise fares on the main routes into both cities. In the third week, neither applies, and the original favourite comes back on top with the lowest total.

If the organiser had fixed the first week, the best they could have done was the second-best city at a premium. Looking at place and date together reveals the combination that would otherwise stay hidden.

What makes a date expensive

Before you calculate, it helps to know where the peaks are. Check each candidate date for:

• trade fairs, congresses and major events in every candidate city

• public and school holidays, both where attendees start and where they meet

• the first and last days of holiday periods, when leisure and business travel overlap

• arrival days that force a hotel night, for example a Monday morning start that pulls long-distance travellers in on Sunday

• rail engineering works or timetable changes on the main routes

• the season: weather risk for flights, or a destination's high season for hotels

None of these rules out a date by itself. They tell you where to look closely.

Why compare up to three dates

One date gives you no alternative. Too many dates make the schedule impossible to agree. Three is a practical middle: enough spread to sidestep a trade fair week or a holiday peak, still easy to clear with the executives and speakers who have to be there.

Choose dates that differ in a meaningful way, such as different weeks rather than Tuesday and Wednesday of the same week. Agree the non-negotiables first: board availability, speakers, product launches, the end of the financial year. Then offer the three dates that remain to the calculation, not to a poll.

How to compare alternative dates

1. Fix the constraints. List the people who must attend and the periods that are ruled out.

2. Pick up to three dates. Spread them across different weeks where you can.

3. Keep everything else the same. Use the same origins, head counts, travel classes and candidate cities for every date, so the dates are compared fairly.

4. Calculate door to door. For every date and every city, calculate travel cost, CO2 and travel time as described in how to calculate the true travel cost of a meeting.

5. Compare combinations, not rankings. Look for the best city and date together. The best city on date one may not be the best overall.

6. Check the practical side. For the leading combinations, confirm hotel availability, venue capacity and events in the city.

7. Record your benchmark. Keep the date and place you would have chosen anyway, so the savings can be shown.

Fares are live data, so a calculation is most accurate close to the moment you decide and book.

How the Meeting Place Finder compares dates

Every calculation in the Meeting Place Finder covers one event on one date. You can compare up to three dates, and each date is its own calculation. We calculate every attendee's trip to every candidate city on each date, with real schedules and fares, and show travel cost, CO2 and travel time side by side.

You can also compare a preferred location you already have in mind with the best option on each date. The full picture of criteria, from origins to accessibility, is in our guide on how to choose a meeting location.

Each date is its own calculation, so two dates cost twice the price of one; our sales team sends you the price for your event. The prices and credits page explains how pricing works and when subscriptions pay off.

FAQ

How many alternative dates should I compare?

Up to three. That is usually enough to avoid a trade fair week or a holiday peak, and still easy to agree with the people who must attend.

How do trade fairs affect the cost of a meeting?

They fill hotels in the host city and push room rates and sometimes fares up. A city that is the best choice in a normal week can become the expensive option during a large fair.

Does the date also change CO2 emissions?

Yes. When a direct train or flight is not available on a date, attendees switch modes or take connections with more distance. Both change the CO2 figure.

Does comparing dates cost extra?

Yes: each date is its own calculation, so two dates cost twice the credits of one. Any number of cities is included in each. Compare the dates that are real options for your event.

Which day of the week is best for a meeting?

It depends on where attendees start. A start time that lets the furthest travellers arrive on the day avoids extra hotel nights, and that is easier to calculate than to guess.

If you would like to see how much a date can change, book a demo and we will compare dates for one of your events with you. Or request a free trial for one event and one date.