Train vs Car vs Coach vs Plane: UK Travel Cost Comparison 2026
Route-by-route cost comparison for 6 popular UK journeys, including the parking, fuel and toll costs a headline fare comparison leaves out. Coach fares, pump prices and driving charges rechecked against operator and government sources in September 2026.
Cost Per Mile Comparison
| Mode | Cost Per Mile | Notes |
|---|---|---|
| Coach (advance) | 3-8p | National Express published one-way floors on the routes below. |
| Train (advance) | 7-15p | Advance ticket booked 12 weeks ahead. |
| Train (off-peak) | 15-22p | Flexible off-peak single. |
| Car (fuel only) | ~19.5p | 40mpg at 172.0p/litre petrol. A 50mpg car is ~15.6p, a 30mpg car ~26p. |
| Train (anytime) | 25-35p | Full anytime fare, maximum flexibility. |
| Car (fuel + parking) | 25-45p | On the journeys below, once a city-centre day's parking is added. |
| Car (HMRC full running cost) | 55p / 25p | HMRC's Approved Mileage Allowance: 55p for the first 10,000 business miles, 25p after. Covers fuel, servicing, tyres, VED, insurance and depreciation; excludes parking and tolls. |
| Domestic flight | varies wildly | Airline pricing is dynamic; airport transfers and luggage fees sit on top. |
Route-by-Route Comparison
Coach “from” fares are National Express’s own published one-way floors, taken from its route pages (nationalexpress.com, checked September 2026). National Express stamps them correct as at 13 July 2026 for travel up to 9 November 2026, and they include its £1.50 booking fee, which it waives when you are signed in to My Account. They are also directional: the return leg is often priced differently. Megabus is frequently quoted at “from £1”, but it no longer publishes any fare figure on its site and sells only through a live journey planner, so we do not carry a Megabus floor. Train fares are operator advance and off-peak singles. Car figures are our own arithmetic, not a quote: miles multiplied by 19.5p, which is a 40mpg petrol car at 172.0p a litre (the DESNZ weekly road fuel price for the week commencing 21 September 2026), plus the assumed parking shown on each row. Substitute your own car’s mpg and your real parking cost and the sum still works.
Hidden Costs of Driving
Fuel is just the visible cost. The full picture includes:
Parking
£12-25/day assumedThe figure this page assumes for a city-centre day, and central London higher. Operators and councils price car parks individually, so check your actual destination rather than relying on a city average.
Congestion charge
London £18/dayTfL's Congestion Charge rose from £15 to £18 on 2 January 2026. It runs 07:00-18:00 Monday to Friday and 12:00-18:00 at weekends and on bank holidays, and is not charged between Christmas Day and the New Year bank holiday.
Running costs beyond fuel
55p / 25p per mileHMRC's Approved Mileage Allowance Payment rate, raised from 45p in April 2026: 55p per mile for the first 10,000 business miles and 25p thereafter. HMRC states it covers fuel, servicing, tyres, road fund licence, insurance and depreciation.
Tolls, where a route uses them
M6 Toll £12.00, Dartford £3.50The M6 Toll is zonal: £12.00 for a car across all three zones, £6.90 for one zone, or £10.20 on a Breeze account. It is optional, since the untolled M6 through the West Midlands is the alternative. Dartford Crossing is £3.50 per crossing, or £2.80 on a pre-pay account. HMRC's mileage rate above excludes tolls and parking, so these are genuinely additional.
When Each Mode Wins
Train wins for...
- Solo traveller on long routes (100+ miles)
- London journeys (no parking, congestion charges avoided)
- When advance tickets are available
- When time matters - train is always faster city centre to city centre
Car wins for...
- Group of 3-4 sharing (split fuel and parking)
- Rural destinations not on main rail routes
- Last-minute travel when anytime fares are expensive
- If destination has free parking
Coach wins for...
- Budget travel where time is not critical
- Students and young travellers with flexibility
- Routes with good National Express/Megabus connections
- When advance booking several weeks ahead
Environmental Impact
Of the four options on this page, train is the lowest-carbon for most UK journeys: about 31g CO2e per passenger-km, against about 174g for a medium petrol car carrying one person and about 229g for a domestic flight once the high-altitude non-CO2 effects are counted, as DESNZ advises. Coach sits at about 39g. The car factor is published per vehicle-km rather than per passenger, so it splits across everyone travelling: three people sharing works out at about 58g each, which puts a full car below the coach. Figures are the DESNZ 2026 greenhouse gas conversion factors published 11 June 2026, from the business travel land and air sheets.