Compare Medium Haul

Train vs Flight: Portsmouth Puerto to Sierre/Siders

🇬🇧 Portsmouth Puerto → 🇨🇭 Sierre/Siders · 809 km

Verdict

Flight is faster by 3h 46m door-to-door, but train produces 84% less CO2 — worth considering.

On this medium-haul route from Portsmouth Puerto to Sierre/Siders, the flight is faster door-to-door, but the train is a greener alternative — saving 173 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	6h 44m	58m
Door-to-door incl. check-in / airport	7h 14m +30 min at station	3h 28m +2h 30min at airport
CO2 emissions avg. estimate per passenger	33,2 kg	206,3 kg
Est. ticket price rough estimate only	~€65	~€97
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 173,1 kg CO2 — 84% less than flying

Train: 33,2 kg CO2 · Flight: 206,3 kg CO2 (41g/km train vs 255g/km flight, European averages incl. radiative forcing)

Train

33,2 kg

Flight

206,3 kg

Door-to-Door Breakdown

Train

Check-in at station 30 min

Journey time 6h 44m

Total door-to-door 7h 14m

Flight

Faster door-to-door

Airport overhead 2h 30 min

Flight time 58m

Total door-to-door 3h 28m

Train tickets for this route

Portsmouth Puerto → Sierre/Siders · full route details

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Frequently Asked Questions

Is train or flight faster from Portsmouth Puerto to Sierre/Siders?

Flight is faster from Portsmouth Puerto to Sierre/Siders, taking 3h 28m door-to-door versus 7h 14m for the train. However, the train produces 84% less CO2.

How much CO2 does the Portsmouth Puerto–Sierre/Siders train vs flight produce?

For the Portsmouth Puerto to Sierre/Siders route (809 km straight-line), the train produces approximately 33,2 kg of CO2 per passenger, while the flight produces approximately 206,3 kg. Taking the train saves 173,1 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 Portsmouth Puerto to Sierre/Siders?

Door-to-door travel time from Portsmouth Puerto to Sierre/Siders:

Train: 7h 14m total (6h 44m journey + 30 min station check-in)
Flight: 3h 28m total (58m flight + 2h 30min airport overhead for check-in, security, boarding, and taxi)

Is the Portsmouth Puerto to Sierre/Siders train worth it vs flying?

How far is Portsmouth Puerto from Sierre/Siders?

The straight-line distance from Portsmouth Puerto to Sierre/Siders is 809 km. The actual rail distance will be longer (typically ~1.3× the straight-line distance) due to track routing.