What Carbon Costs Most: The Flight, the Hotel, or the Food?
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The flight dominates. But the breakdown reveals where you actually have leverage—and where to focus your effort.
Dear IMPT Family,
Every traveller asks this at some point: where does my trip’s carbon really come from? I’m flying, I’m staying in a hotel, I’m eating out every meal. Which of these is the climate culprit? The answer matters because it tells you where your climate action is most effective. Cutting flight is hard. Changing your diet or accommodation choices might be easier and still yield results.
Let’s do the math.
🔥 Key Highlights 🔥
1️⃣ The flight typically accounts for 60–80% of a trip’s carbon, depending on distance and duration
2️⃣ The hotel is secondary—roughly 10–25% depending on size and energy source
3️⃣ Food is typically 5–15%, with meat-heavy diets at the higher end
4️⃣ Distance multiplies everything: long-haul flights dominate; short trips favour hotels and food
5️⃣ Relative impact varies, but the hierarchy is almost always: flight > hotel > food
1️⃣ The Flight Dominates
For a typical week-long trip:
Example 1: London to Barcelona (short-haul)
✔ Flights (roundtrip, economy): 250 kg CO₂
✔ Hotel (7 nights, mid-range): 120 kg CO₂ (assuming ~17 kg per night)
✔ Food (7 days, mixed diet): 50 kg CO₂ (rough average)
Total: 420 kg. Flight share: 60%
Example 2: London to Tokyo (long-haul)
✔ Flights (roundtrip, economy): 2,000 kg CO₂
✔ Hotel (7 nights, mid-range): 100 kg CO₂ (shorter stay in an efficient hotel)
✔ Food (7 days, mixed diet): 50 kg CO₂
Total: 2,150 kg. Flight share: 93%
The flight’s dominance is obvious. Anything beyond 2,000 km, and the flight overshadows everything else.
2️⃣ The Hotel Carbon Varies Enormously
A night in a large, energy-inefficient resort hotel might emit 50+ kg CO₂ per guest per night (especially with air-conditioning, heated pools, laundry services). A night in an eco-certified hotel might be 5–10 kg. A night in a small guesthouse or airbnb might be even lower.
This 5-10x spread means hotel choice matters—but only if the flight is modest. On a short trip, better hotel choice can reduce carbon by 10–20%. On a long trip, it’s noise compared to the flight.
3️⃣ Food is Surprisingly Low (Usually)
The average diet while travelling generates roughly 7–10 kg CO₂ per day. A meat-heavy diet (beef and lamb at every meal) might hit 15 kg. A vegetarian diet might be 4 kg. The difference between best and worst case is roughly 10 kg per day—meaningful but not dominant.
For a week-long trip, choosing vegetarian meals saves roughly 50–70 kg CO₂. That’s real, but it’s dwarfed by a transatlantic flight (1,500+ kg).
4️⃣ The Distance Effect
The hierarchy shifts with trip length. For a weekend trip (3 nights) to a nearby city:
✔ Flights: 100 kg (short-haul)
✔ Hotel: 50 kg (3 nights)
✔ Food: 25 kg
Flight is still dominant (48%), but hotels and food are proportionally more important. This is why hotel choice and diet matter more for short trips.
For a month-long trip with one long flight:
✔ Flights: 1,500 kg (amortised)
✔ Hotel: 600 kg (30 nights)
✔ Food: 300 kg
Flight is still 60%, but the absolute carbon from accommodation and food has grown. On a long trip, you have leverage across all three categories.
5️⃣ Where Your Climate Action Matters Most
For short-haul and short trips: The flight still dominates, but hotel choice (eco-certified vs energy-intensive) and diet (vegetarian vs meat-heavy) can reduce 10–20% of total. Worth considering.
For long-haul trips: The flight is so dominant that optimising hotels and food yields minor reductions (1–5% of total). Your effort is better spent on reducing flight frequency or flying business class (which paradoxically might be more efficient per km if occupied, because business-class seats take up less of the plane’s carbon per person than empty economy seats).
For month-long trips: All three matter. Your longest lever is still the initial flight (cannot be changed once booked). But spreading stays across 30 nights means each night’s hotel impact is meaningful, and 30 days of diet choices accumulate.
6️⃣ The Strategic Implication
This math suggests a ranking of climate actions:
- Don’t take the trip (most effective but not feasible)
- Reduce flight distance or frequency (most impactful: a short flight saves 50% vs long flight)
- Stay longer (amortises flight carbon across more days)
- Choose eco-certified hotels (10–20% reduction per night, meaningful over week+)
- Eat less meat (5–10% reduction, easy but modest)
- Offset the flight (neutralises the remainder if you can’t reduce)
Looking Ahead — Focus Your Climate Effort
The flight is almost always the biggest lever. If you’re taking a trip, that decision is made—the carbon is committed. Your best actions are: staying longer (to amortise flight carbon), choosing an eco-certified hotel (10–20% reduction), and eating less meat (modest but easy). Offset the flight through carbon credits if you’re using IMPT, and you’ll have substantially reduced your trip’s climate impact. The mathematics aren’t romantic—but they’re clear.
Let’s keep building — together. 🌍💚
