London to Cambridge by train - Kings Cross vs Liverpool Street route
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Piotr · Founder, Railly
Piotr built Railly after one too many commutes spent guessing platforms and chasing Delay Repay claims. He verifies every guide against live timetable data, operator portals, and National Rail station records.
In short: Two routes run from London to Cambridge. The Kings Cross route (Great Northern) is fastest at 51 minutes and supports contactless. The Liverpool Street route (Greater Anglia) takes 72–89 minutes and is the right choice if you're starting in east London.
cambridge-by-train-kings-cross-vs-liverpool-street-routes">London to Cambridge by train — Kings Cross vs Liverpool Street routes
King's Cross and Liverpool Street sit on opposite sides of central London. The train services from each use different tracks, operators, and intermediate stations.
| Route | From | Operators | Services/day | Fastest time |
|---|---|---|---|---|
| Kings Cross | KGX, also St Pancras (Thameslink) | Great Northern, Thameslink | 50 | 51 min |
| Liverpool Street | LST | Greater Anglia | 25 | 72 min |
Kings Cross is the dominant route. Great Northern runs the fastest services — these reach Cambridge in 51 minutes, typically calling only at Finsbury Park and Stevenage. Thameslink services from the same platforms at Kings Cross take longer (60-90 minutes) because they stop at more stations — they continue through London to St Pancras, Farringdon, City Thameslink, and Blackfriars before heading south to destinations like Gatwick and Brighton. You can also board Thameslink Cambridge trains at St Pancras and Farringdon.
Kings Cross is turn-up-and-go for most of the day. The first train leaves around 00:01 and the last about 23:31. During weekday peaks, expect 2-3 departures per hour across Great Northern and Thameslink combined.
Liverpool Street is the alternative. Greater Anglia runs this route through Tottenham Hale, Cheshunt, Broxbourne, and Harlow before reaching Cambridge. The journey takes about 72 minutes on the fastest services and about 89 minutes on the stoppers. It is the right choice if you're in east London (Stratford connects via Tottenham Hale), near Liverpool Street itself, or anywhere along the Lea Valley north of London.
Your operator options
| Operator | From | Journey time | Key point |
|---|---|---|---|
| Great Northern | Kings Cross | 51–60 min | Fastest. Semi-fast services. |
| Thameslink | Kings Cross, St Pancras, Farringdon | 60–90 min | Slower (more stops). Connects through London. |
| Greater Anglia | Liverpool Street | 72–89 min | Different corridor. More stops. |
Great Northern is the commuter operator. Their trains (Class 387 electric units on the fast services) are standard seating with no first class on most Cambridge services. Fast trains call at Finsbury Park, Stevenage, and one or two other stations before Cambridge.
Thameslink runs the same route with more stops — these trains serve intermediate stations like Potters Bar, Hatfield, Welwyn Garden City, and Hitchin that Great Northern expresses skip. If you need one of those stations, Thameslink is your train. Otherwise, take Great Northern.
Greater Anglia runs newer Stadler trains (Class 745) from Liverpool Street. These are more spacious than the Great Northern units, with power sockets at every seat, decent tables, and an on-board shop (on most services). The journey is about 20 minutes longer, but if you're starting from east London, the time saved not crossing to Kings Cross generally offsets the longer train journey.
Neither route has a first-class option on Cambridge services.
Fares and the contactless trap
| Scenario | Approximate cost |
|---|---|
| Advance, Greater Anglia (booked ahead) | £8–15 |
| Advance, Great Northern (booked ahead) | £10–15 |
| Off-Peak day return (Kings Cross) | £15–20 |
| Off-Peak day return (Liverpool Street) | £20–25 |
| Anytime day return | £25–40 |
| Contactless/Oyster (Kings Cross only) | Similar to Off-Peak/Anytime |
Contactless works on Great Northern and Thameslink services from Kings Cross, but not on Greater Anglia from Liverpool Street. If you're travelling from Liverpool Street, you must buy a ticket — either in advance, at the station, or via an app.
Network Railcards give 1/3 off on the Kings Cross route but the minimum fare (£13) applies before 10:00 on weekdays. Other Railcards (Two Together, Senior, 26-30, Family & Friends) work on both routes.
Making the choice
Kings Cross if: you're anywhere on the Northern, Piccadilly, Victoria, Metropolitan, Circle, or Hammersmith & City lines. Also if you're near St Pancras, Farringdon, City Thameslink, or Blackfriars (Thameslink board), or if you want the fastest possible journey.
Liverpool Street if: you're on the Central line, near Stratford (change at Tottenham Hale), anywhere in east London, or along the Greater Anglia line toward Cheshunt and Harlow.
cambridge">Arriving in Cambridge
Cambridge station is about a mile from the city centre — a 20-minute walk or a 5-minute bus ride (the bus station is directly outside). The station building is a mix of the original Victorian structure and a modern glass extension. There is a M&S Simply Food, a Pumpkin Cafe, and a taxi rank. The concourse gets busy during the morning peak but clears quickly.
The platforms are on two levels — the main platforms (1-4) are at street level, and platforms 7-8 (the island platform) are accessed via a footbridge. Most London services use platforms 1-4.
Where each route falls apart
Kings Cross route:
- Welwyn Viaduct — a two-track bottleneck on a mostly four-track railway. A train failure on the viaduct stops everything north and south.
- Finsbury Park — the junction where the East Coast main line splits from the Cambridge line. A delayed long-distance LNER service can block Cambridge departures.
- Points failures at Hitchin — the junction where the Cambridge line diverges from the main East Coast route. A common failure point in cold weather.
Liverpool Street route:
- Tottenham Hale — the junction where the Stansted Express splits from the Cambridge line. A delayed Stansted service can cascade into the Cambridge path.
- Lea Valley flooding — the stretch through Waltham Cross and Cheshunt sits in the Lea Valley flood plain. Heavy rain occasionally forces speed restrictions.
Both routes fall under DR15 schemes. A 30-minute delay on a £15 single is worth £7.50 back. Check Railly's delay repay page for how to claim, or read our step-by-step guide.
Final notes
- Check the live board for Kings Cross or Liverpool Street before you leave — Cambridge services from Kings Cross are mostly on the low-numbered platforms (1-6).
- If you're visiting Cambridge for the day, buy an Off-Peak day return — no need to book Advance for a journey this short. The savings are marginal and you'll appreciate the flexibility if your plans change.
- Cambridge station is a long walk from the centre. If it's raining, the bus (just outside the station) is faster and cheaper than a taxi.
- Bike parking at Cambridge station is large. If you're a cyclist commuting in, you won't struggle to find space.
- For ticket type basics and when contactless works, see understanding UK rail tickets.
— Last checked against Great Northern, Thameslink, and Greater Anglia timetables, June 2026.