Sunniest places to go from London in April
The sunniest place you can reach from London in April within 15 hours is Toledo at 12.1 h, costing 335 kg CO₂e return. The lowest-carbon option is Calais at 4.5 kg — 74× less carbon for 3.1 h less.
Every destination here is on the efficiency frontier: nowhere else in Europe is both sunnier in April and lower in carbon. Anything a better option beats outright has been left out.
By rail or ferry By air
What the 15-hour limit costs: at this budget Marseille can only be reached by air — 252 kg CO₂e, in 4h 48m. Allow up to 24 hours and the train does the same journey for 29.6 kg in 15h 42m — 9× less carbon for 10h 54m more travelling.
| Destination | How | CO₂e return | Temp | Sun/day | Rain/day | Journey |
|---|---|---|---|---|---|---|
| Calais, France | Rail | 4.5 kg | 9.6 °C | 9.0 h | 2.9 mm | 4h 6m |
| Great Yarmouth, United Kingdom | Rail | 14.2 kg | 9.0 °C | 9.5 h | 2.2 mm | 4h 24m |
| Romans-sur-Isère, France | Rail | 24.0 kg | 11.8 °C | 10.2 h | 1.8 mm | 13h 6m |
| Orange, France | Rail | 26.5 kg | 13.4 °C | 11.0 h | 1.3 mm | 14h 18m |
| Marseille, France | Air | 252 kg | 13.7 °C | 11.7 h | 0.8 mm | 4h 48m |
| Toledo, Spain | Air | 335 kg | 16.4 °C | 12.1 h | 0.4 mm | 5h 18m |
Warm is not the same as pleasant, which is why sunshine and rainfall are shown alongside temperature. All three are ERA5 monthly means for 2023–2024.
Where the curve breaks
The frontier is gentle until it isn't. Going from Orange (26.5 kg, 11.0 h) to Marseille (252 kg, 11.7 h) buys 0.7 hours more sunshine for an extra 226 kg — 322 kg of CO₂e per hour. That single step is the most expensive sunshine on the whole curve.
The pick of them
If you'd rather have heat than sunshine
April answers differently depending on what you're after. The warmest destinations from London in April are a different list — hours of sunshine and degrees of warmth come apart, especially early and late in the year.
Where to stay in Toledo
Places to stay in Toledo, Spain, on a live map. Prices and availability come from Stay22 and its booking partners.
Affiliate disclosure. A booking made through this map may earn 0xCarbon a commission, at no extra cost to you. It changes nothing above it: the emissions figures come from UK Government conversion factors and are computed before anyone is paid anything.See the method.
Other months from London
April from elsewhere
- Amsterdam
- Barcelona
- Berlin
- Birmingham
- Bristol
- Brussels
- Cardiff
- Copenhagen
- Dublin
- Edinburgh
- Frankfurt
- Glasgow
- Leeds
- Lisbon
- Liverpool
- London
- Madrid
- Manchester
- Milan
- Munich
- Newcastle
- Nottingham
- Oslo
- Paris
- Prague
- Rome
- Sheffield
- Southampton
- Stockholm
- Vienna
- Warsaw
- Zurich
Questions
Where is the sunniest place to go from London in April?
Toledo, Spain, at 12.1 h. Reaching it emits 335 kg CO₂e return, travelling 5h 18m each way by air.
Can I get somewhere sunny from London in April without flying?
Yes. Orange reaches 11.0 h and is reachable by rail or ferry in 14h 18m, emitting 26.5 kg CO₂e return — though Toledo is sunnier still, if you fly.
How much carbon does a return trip from London to Toledo produce?
335 kg CO₂e for one person, return, by air. That uses the UK Government's 2026 conversion factors, including radiative forcing for flights.
Carbon uses UK Government (DESNZ/DEFRA) 2026 conversion factors applied to great-circle distance, with radiative forcing included for flights. Rail journey times are modelled estimates, not timetabled services. Full method · download the data.