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Carmarthen to Boston trains

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Trip Overview

The average train between Carmarthen and Boston takes 8h 2m and the fastest train takes 6h 23m. There is a train service every few hours from Carmarthen to Boston. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

8h 2m
Duration
363 mi
Distance
£167
Average price
Every 2 hours
Frequency

Train via London

best
  1. Take the train from Carmarthen to Swanseatrain train
  2. Take the train from Swansea to London Paddingtontrain train
  3. Take the train from King's Cross to Granthamtrain train
  4. Take the train from Grantham to Bostontrain train
7h 24m
£128–248

Carmarthen to Boston train times

Trains run every 2 hours between Carmarthen and Boston. The earliest departure is at 5:32 AM in the morning, and the last departure from Carmarthen is at 10:41 PM which arrives into Boston at 10:18 AM. All services require a transfer at Swansea and take an average of 8h 2m. The schedules shown below are for the next available departures.

Departing Sunday, October 11, 2026

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    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 42m • 4 changes

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    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 44m • 4 changes

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    Great Western Railway (GWR)Great Western Railway (GWR)London Underground (Tube)Hull TrainsEast Midlands Railways6h 55m • 4 changes

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    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 48m • 4 changes
  • Show more

Departing Monday, October 12, 2026

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 46m • 4 changes

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    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 26m • 4 changes

  •  → 

    Great Western Railway (GWR)Great Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 55m • 4 changes

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 48m • 4 changes
  • Show more

Departing Tuesday, October 13, 2026

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 46m • 4 changes

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 26m • 4 changes

  •  → 

    Great Western Railway (GWR)Great Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 55m • 4 changes

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 48m • 4 changes
  • Show more

Departing Wednesday, October 14, 2026

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 46m • 4 changes

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 26m • 4 changes

  •  → 

    Great Western Railway (GWR)Great Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 55m • 4 changes

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 48m • 4 changes
  • Show more

Departing Thursday, October 15, 2026

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 46m • 4 changes

  •  → 

    Transport for WalesGreat Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 26m • 4 changes

  •  → 

    Great Western Railway (GWR)Great Western Railway (GWR)London Underground (Tube)London North Eastern Railway Limited (LNER)East Midlands Railways6h 55m • 4 changes

Frequently asked questions

Want to know about travelling from Carmarthen to Boston? 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 Carmarthen to Boston.ExpandLaunch map view
  • Distance: 362.9 mi
  • Duration: 8h 2m

What companies run services between Carmarthen, Wales and Boston, England?

You can take a train from Carmarthen to Boston via Swansea, London Paddington, Paddington, King's Cross St. Pancras station, King's Cross, and Grantham in around 7h 24m.

Operators