Compare Medium Haul

Train vs Flight: Barcelona Sants to Sierre/Siders

🇪🇸 Barcelona Sants → 🇨🇭 Sierre/Siders · 696 km

Verdict

Flight is faster by 2h 59m door-to-door, but train produces 84% less CO2 — worth considering.

On this medium-haul route from Barcelona Sants to Sierre/Siders, the flight is faster door-to-door, but the train is a greener alternative — saving 149 kg of CO2 per passenger. If your schedule allows extra travel time, the train offers a comfortable, eco-friendly journey.

Comparison

	Train	Flight ✓
Journey time	5h 49m	50m
Door-to-door incl. check-in / airport	6h 19m +30 min at station	3h 20m +2h 30min at airport
CO2 emissions avg. estimate per passenger	28.5 kg	177.5 kg
Est. ticket price rough estimate only	~€56	~€84
City centre arrival	Central station	Airport (outside city)

* Price and CO2 figures are rough average estimates. Actual values vary by booking class, date, operator, and energy mix. Journey times are based on existing route data or standard speed assumptions.

CO2 Savings

Save 149.0 kg CO2 — 84% less than flying

Train: 28.5 kg CO2 · Flight: 177.5 kg CO2 (41g/km train vs 255g/km flight, European averages incl. radiative forcing)

Train

28.5 kg

Flight

177.5 kg

Door-to-Door Breakdown

Train

Check-in at station 30 min

Journey time 5h 49m

Total door-to-door 6h 19m

Flight

Faster door-to-door

Airport overhead 2h 30 min

Flight time 50m

Total door-to-door 3h 20m

Train tickets for this route

Barcelona Sants → Sierre/Siders · full route details

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Frequently Asked Questions

Is train or flight faster from Barcelona Sants to Sierre/Siders?

Flight is faster from Barcelona Sants to Sierre/Siders, taking 3h 20m door-to-door versus 6h 19m for the train. However, the train produces 84% less CO2.

How much CO2 does the Barcelona Sants–Sierre/Siders train vs flight produce?

For the Barcelona Sants to Sierre/Siders route (696 km straight-line), the train produces approximately 28.5 kg of CO2 per passenger, while the flight produces approximately 177.5 kg. Taking the train saves 149.0 kg of CO2 — a 84% reduction. These are average estimates based on European averages (train: 41g CO2/km, flight: 255g CO2/km including radiative forcing).

What is the door-to-door travel time for train vs flight Barcelona Sants to Sierre/Siders?

Door-to-door travel time from Barcelona Sants to Sierre/Siders:

Train: 6h 19m total (5h 49m journey + 30 min station check-in)
Flight: 3h 20m total (50m flight + 2h 30min airport overhead for check-in, security, boarding, and taxi)

Is the Barcelona Sants to Sierre/Siders train worth it vs flying?

How far is Barcelona Sants from Sierre/Siders?

The straight-line distance from Barcelona Sants to Sierre/Siders is 696 km. The actual rail distance will be longer (typically ~1.3× the straight-line distance) due to track routing.