Travel Iberia, Data-First
Compare time, one-way price ranges, and carbon impact for the most important routes across Spain & Portugal — using transparent, research-backed assumptions.
Train vs Flight vs Bus — Time, Price & CO₂e
Or explore by priority below.
These tools use the same assumptions as our Cost, Time and Carbon comparison pages.
Transport Insights
Occasional analysis on time, cost, and carbon in Iberian Travel.
Explore our tools
Star with the live tools below. New modules launch in stages.
Hotel Transportation Carbon Calculator
Estimate transport-related CO₂e influenced by hotels.
Featured comparison
A decision-ready route breakdown you can trust-built with transparent assumptions.
- Transparent assumptions (no hidden math)
- Door-to-door logic (airport buffers included)
- Research Desk sources (documented & versioned)
- Updated quarterly so comparisons stay current
See our methodology →
Platform status
- Carbon Calculator Hub — Live
- Hotel Transportation Calculator — Live
- Comparisons Hub — Rolling out
- Trip Planner — In development
- Interactive Maps — In development
Start with one question
What’s the lowest carbon option that still fits your time and budget?
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