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Harlow to Carmarthen trains

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Trip Overview

The average train between Harlow and Carmarthen takes 5h 5m and the fastest train takes 4h 40m. There is a train service every few hours from Harlow to Carmarthen. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

5h 5m
Duration
248 mi
Distance
£127
Average price
Hourly
Frequency

Train via Swansea

best
  1. Take the train from London Paddington to Swanseatrain train London Paddington - Swansea / ...
  2. Take the train from Swansea to Carmarthentrain train Bristol Temple Meads - Milford Haven / ...
5h 20m
£104–194

Harlow to Carmarthen train times

Trains run hourly between Harlow and Carmarthen. The earliest departure is at 5:31 AM in the morning, and the last departure from Harlow is at 9:38 PM which arrives into Carmarthen at 6:46 AM. All services require a transfer at London Liverpool Street and take an average of 5h 5m. The schedules shown below are for the next available departures.

Departing Thursday, October 15, 2026

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Great Western Railway (GWR)4h 46m • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales4h 49m • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Great Western Railway (GWR)5h • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales4h 46m • 3 changes
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Departing Friday, October 16, 2026

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales4h 59m • 3 changes

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    Stansted ExpressLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales5h 2m • 3 changes

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    Stansted ExpressLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales4h 53m • 3 changes

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    Stansted ExpressLondon Underground (Tube)Great Western Railway (GWR)Great Western Railway (GWR)4h 43m • 3 changes
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Departing Saturday, October 17, 2026

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    Stansted ExpressLondon Underground (Tube)Great Western Railway (GWR)Great Western Railway (GWR)4h 40m • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales5h 10m • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Great Western Railway (GWR)4h 48m • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales5h 9m • 3 changes
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Departing Sunday, October 18, 2026

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    Stansted ExpressLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales5h 35m • 3 changes

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    Stansted ExpressLondon Underground (Tube)Great Western Railway (GWR)Great Western Railway (GWR)4h 47m • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Transport for Wales5h 13m • 3 changes

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    Greater AngliaLondon Underground (Tube)Great Western Railway (GWR)Great Western Railway (GWR)4h 43m • 3 changes
  • Show more

Frequently asked questions

Want to know about travelling from Harlow to Carmarthen? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.

Map of how to get from Harlow to Carmarthen.ExpandLaunch map view
  • Distance: 248.4 mi
  • Duration: 5h 5m

What companies run services between Harlow, Essex, England and Carmarthen, Wales?

You can take a train from Harlow Town to Carmarthen via London Liverpool Street, Liverpool Street station, Paddington, London Paddington, and Swansea in around 5h 20m.

Operators