Suitcase TheoryA working theory of travelling light

Travel Routine

Eating on the move without losing the afternoon

Travel disrupts meals in predictable ways, and the resulting energy crashes are usually a timing problem rather than a food problem.

Elderly man enjoying a coffee break with a sea view in Portugal.
Photograph by Kampus Production via Pexels
Editorial note. Independent reporting and analysis. Nothing here is sponsored or paid for. How we work.

Everything here earned its place by changing an outcome. Nothing about eating while travelling is included to round the number up.

What matters most

  • Long gaps followed by one large meal is the pattern that produces afternoon crashes.
  • Transport hubs have limited choice at the times you actually pass through.
  • Eating on the destination schedule helps the body clock settle.

The pattern that causes the problem

Travel days push eating into whatever gap exists, which usually means nothing for six hours and then a large meal at an airport. That produces the familiar sequence of hunger, an oversized meal and an afternoon spent unable to concentrate.

The issue is the shape of the day rather than the specific food, which is why choosing a healthier version of the same pattern changes little. Spacing intake across the day, even modestly, is the intervention that actually works.

Carry something

Nuts, fruit, oat bars or bread from a supermarket cost a fraction of hub prices and remove dependence on what happens to be open. This matters most on early departures and late arrivals, which are exactly the times nothing is serving.

Restrictions on carrying fresh produce across borders are real and vary by country, particularly for meat, dairy and plant material. Check the destination's rules before packing food, since seizure at the border is common and occasionally fined.

Eat on the destination clock

Shifting meals to the destination's schedule on arrival helps the body clock adjust, since food timing is one of the signals that entrains it. Eating a full meal at three in the morning body time because dinner is being served on board works against the adjustment you are trying to make. Where a flight lands in the morning, a normal breakfast rather than sleep is generally the better move.

This is a modest effect compared with light exposure, but it is free and points the same direction.

Hydration and the practical stuff

Cabin air is very dry and airport days involve a lot of walking, both of which produce a mild dehydration that reads as fatigue. A refillable bottle filled after security addresses both the cost and the supply, and most large airports now have taps or fountains. Coffee is useful for alertness and unhelpful late in the day if you are trying to sleep on a new schedule.

On a long trip, alcohol on travel days compounds dehydration and fragments the sleep you are relying on to arrive functional.

Stomach upsets and water

The common causes of travellers' stomach problems are food and water handling rather than the cuisine, and the risk varies enormously by destination. Where tap water is not safe to drink, it is also not safe in ice, in salads that were washed in it, or on a toothbrush. Busy places with high turnover and food cooked in front of you are generally lower risk than quiet places with prepared food sitting out.

The working rule: anyone with an underlying condition, or anyone becoming seriously unwell, should seek medical advice locally rather than self-managing.

Airline and carrier policies differ, and they change without much notice.

Long stays change the answer

A kitchen converts the whole problem into an ordinary domestic one and reduces costs substantially. Shopping at a local supermarket once is faster and cheaper than eating every meal out, and it is also a reasonable way to see how a place actually lives.

On a long trip, eating out for every meal becomes both expensive and monotonous faster than people expect. The point is not austerity; it is that a trip with a kitchen has a different and usually better rhythm.

Everything above, in order of what to do first

  1. The pattern that causes the problem. Travel days push eating into whatever gap exists, which usually means nothing for six hours and then a large meal at an airport.
  2. Carry something. Nuts, fruit, oat bars or bread from a supermarket cost a fraction of hub prices and remove dependence on what happens to be open.
  3. Eat on the destination clock. Shifting meals to the destination's schedule on arrival helps the body clock adjust, since food timing is one of the signals that entrains it.
  4. Hydration and the practical stuff. Cabin air is very dry and airport days involve a lot of walking, both of which produce a mild dehydration that reads as fatigue.
  5. Stomach upsets and water. The common causes of travellers' stomach problems are food and water handling rather than the cuisine, and the risk varies enormously by destination.
  6. Long stays change the answer. A kitchen converts the whole problem into an ordinary domestic one and reduces costs substantially.

The takeaway

Carry something edible, spread it across the day, and switch to the destination clock as soon as you land.

Every kilo you leave behind pays you back at the third connection.

Questions readers ask

Can I take food through airport security?

Solid food is generally permitted through security, while liquids and gels are subject to the usual rules. Bringing food across a border is a separate matter and varies sharply by country.

Does eating on the new time zone help jet lag?

Meal timing is one of the signals that influences the body clock, so it helps modestly. Light exposure remains the stronger lever.

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Nadia Halloran
Editor, Suitcase Theory

Nadia edits Suitcase Theory and has been running the same 34-litre bag since 2018.

Also by Nadia Halloran