Carmarthen to Boston Trains

Trip Overview

The average train between Carmarthen and Boston takes 8h 4m 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 4m
Duration: 363 mi
Distance: £167
Average price: Every 2 hours
Frequency

Train via London

best

Take the train from Carmarthen to Swanseatrain
Take the train from Swansea to London Paddingtontrain
Take the train from King's Cross to Granthamtrain
Take the train from Grantham to Bostontrain

7h 29m

£128–248

Carmarthen to Boston train times

Trains run every 2 hours between Carmarthen and Boston. The earliest departure is at 5:28 AM in the morning, and the last departure from Carmarthen is at 10:43 PM which arrives into Boston at 10:18 AM. All services require a transfer at Swansea and take an average of 8h 4m. The schedules shown below are for the next available departures.

Departing Sunday, October 25, 2026

7:20 PM → 8:15 AM
Arrives next day
12h 55m • 4 changes
10:34 PM → 10:18 AM
Arrives next day
11h 44m • 4 changes

Departing Monday, October 26, 2026

5:32 AM → 12:18 PM
6h 46m • 4 changes
6:52 AM → 1:18 PM
6h 26m • 4 changes
7:23 AM → 2:18 PM
6h 55m • 4 changes
8:30 AM → 3:18 PM
6h 48m • 4 changes
Show more

Departing Tuesday, October 27, 2026

5:32 AM → 12:18 PM
6h 46m • 4 changes
6:52 AM → 1:18 PM
6h 26m • 4 changes
7:23 AM → 2:18 PM
6h 55m • 4 changes
8:30 AM → 3:18 PM
6h 48m • 4 changes
Show more

Departing Wednesday, October 28, 2026

5:32 AM → 12:18 PM
6h 46m • 4 changes
6:52 AM → 1:18 PM
6h 26m • 4 changes
7:23 AM → 2:18 PM
6h 55m • 4 changes
8:30 AM → 3:18 PM
6h 48m • 4 changes
Show more

Departing Thursday, October 29, 2026

5:32 AM → 12:18 PM
6h 46m • 4 changes
6:52 AM → 1:18 PM
6h 26m • 4 changes
7:23 AM → 2:18 PM
6h 55m • 4 changes
8:30 AM → 3:18 PM
6h 48m • 4 changes
Show more

Departing Friday, October 30, 2026

5:32 AM → 12:18 PM
6h 46m • 4 changes
6:52 AM → 1:18 PM
6h 26m • 4 changes
7:23 AM → 2:18 PM
6h 55m • 4 changes
8:30 AM → 3:18 PM
6h 48m • 4 changes
Show more

Departing Saturday, October 31, 2026

5:28 AM → 12:18 PM
6h 50m • 4 changes
6:54 AM → 1:18 PM
6h 23m • 4 changes
7:24 AM → 2:19 PM
6h 55m • 4 changes
8:30 AM → 3:18 PM
6h 48m • 4 changes
Show more

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.

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 29m.

Operators