Since the Elizabeth line opened, the honest answer to "what's the best way from Heathrow into London?" stopped being obvious. For a solo traveller with a backpack, the train is hard to argue with. For four people with suitcases arriving at 23:40, it isn't close. The useful question isn't which is better — it's where the line falls, and that depends on four things: how many of you there are, how much you're carrying, where you're actually going, and what time you land.
All fares mentioned here are indicative and change; check current pricing before you travel, and we confirm your final taxi fare before you book.
The headline numbers
| | Elizabeth line | Pre-booked taxi | | --- | --- | --- | | Typical cost | Roughly £13–£16 per person to central London, varying by time of day and destination zone | A single estimated fare for the whole car, not per head | | Typical time | About 35–45 minutes to central stations | Around 45–70 minutes door to door, traffic dependent | | Luggage | Carry it yourself, including at the interchange | Loaded once, unloaded once | | Runs overnight? | No — there are gaps in late-night service | Yes | | Price certainty | Fixed and published | Estimated up front, confirmed before you travel |
The critical difference isn't in that table, though. It's that the train price is per person and the taxi price is per car.
The break-even maths
This is the part most comparisons skip. A taxi fare doesn't change much whether one person or four people get in. The train fare multiplies.
At roughly £15 a head, a group of two is looking at about £30 on the Elizabeth line, three is £45, four is £60. Set that against a single estimated fare for a saloon or an estate on the same journey and the ordering flips somewhere around the two-to-three passenger mark — earlier if you're carrying enough luggage to need a larger vehicle anyway, later if you're travelling alone.
So the rule of thumb is genuinely simple:
- Travelling alone, light luggage, daytime, going near a station — the Elizabeth line is very hard to beat.
- Two people — it's close, and luggage usually decides it.
- Three or more — the per-person maths moves decisively toward a taxi.
"Door to door" is not "station to station"
The 35–45 minute figure for the Elizabeth line is platform to platform. Your actual journey includes walking from your terminal to the station, waiting for the next service, and — the part that catches people out — getting from Paddington, Bond Street or Liverpool Street to wherever you're actually staying.
If your destination is a short walk from an Elizabeth line station, that final leg is trivial and the train's time advantage is real. If it isn't, you're adding a Tube change with luggage, or a second taxi at the far end, and the advantage evaporates. A taxi's quoted time is the whole journey; a train's isn't.
This is why the comparison changes by destination rather than by distance. Somewhere in the City or along the Elizabeth line corridor favours the train. A residential address in south London, which the line doesn't reach, usually doesn't.
Luggage is the quiet deciding factor
Two suitcases and a cabin bag between two people is manageable on a train, but it's not pleasant — you're lifting them onto the service, keeping them with you, and moving them again at the interchange.
Beyond that, it stops being a fair fight. Golf clubs, a pushchair, three large cases, ski bags, or anything you'd rather not drag through a station at rush hour all point one way. Our luggage guide covers how to size the vehicle properly, and the Heathrow airport taxi guide explains terminal-by-terminal pickup so the car meets you in the right place.
Time of day changes the answer completely
The Elizabeth line doesn't run around the clock, and the last services are earlier than many arriving passengers assume. A delayed evening long-haul that gets you through baggage reclaim near midnight can leave you looking at a closed station.
Early departures have the mirror problem: for a 06:00 flight you need to be at the terminal well before the first train of the day gets there. Our early morning airport taxi guide goes through how far ahead to book those.
If you're landing late or leaving early, the comparison mostly resolves itself — the train isn't an option, and a pre-booked car is.
When the train is clearly right
It's worth being straightforward about this rather than talking you into a taxi:
- You're travelling alone or as a couple with hand luggage.
- Your destination is close to an Elizabeth line station.
- You're arriving in the middle of the day, when road traffic is at its least predictable and the train's fixed timing is worth most.
- You'd rather have a published fixed price than an estimate.
When a taxi is clearly right
- Three or more passengers — the per-person maths stops being close.
- Substantial luggage — anything you wouldn't want to carry up stairs.
- Late arrivals and very early departures — outside train hours.
- A destination away from the line — south London, outer suburbs, or anywhere needing a second connection.
- Travelling with children, elderly passengers, or anyone with mobility needs — a single loaded journey beats an interchange.
- A flight that might be delayed — a pre-booked car tracked against your flight number adjusts; a train ticket for a specific time doesn't.
For the direct comparison on the most common leg, see our Heathrow to central London route page for an estimated fare, or the wider best airport transfers guide if you're weighing train, coach and taxi across several UK airports.
Frequently asked questions
Q: Is the Elizabeth line cheaper than a taxi from Heathrow? A: For one or two passengers with light luggage, usually yes. Because the train is priced per person and a taxi is priced per vehicle, the advantage narrows at two passengers and generally reverses at three or more.
Q: How long does the Elizabeth line take from Heathrow to central London? A: Around 35–45 minutes to central stations, though that is platform to platform. Add the walk from your terminal, waiting time, and the journey from the station to your final destination for a fair comparison with a door-to-door taxi.
Q: Does the Elizabeth line run all night from Heathrow? A: No. There are gaps in late-night service, so a late arrival or a very early departure may fall outside operating hours. A pre-booked taxi runs at any hour.
Q: Can I take large suitcases on the Elizabeth line? A: You can, but there are no dedicated luggage racks on every service and you carry everything yourself, including at any interchange. For more than one case each, or for pushchairs and sports equipment, a taxi is usually the more practical choice.
Q: Which is better for a group of four from Heathrow? A: A taxi, in most cases. Four Elizabeth line fares add up to a figure that typically exceeds a single estimated taxi fare for the same journey, and you avoid moving four sets of luggage through a station.
Weighing it up for your own trip? Get an estimated fare for your exact pickup and destination and compare it against four train tickets — for most groups the arithmetic makes the decision for you.