Carmarthen to Slough Trains

Carmarthen to Slough trains

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Trip Overview

The average train between Carmarthen and Slough takes 3h 59m and the fastest train takes 3h 51m. The train service runs several times per day from Carmarthen to Slough. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

3h 59m
Duration: 203 mi
Distance: £113
Average price: Every 4 hours
Frequency

Train

best

Take the train from Carmarthen to Readingtrain Carmarthen - London Paddington / ...

3h 42m

£91–183

Carmarthen to Slough train times

Trains run every 4 hours between Carmarthen and Slough. The earliest departure is at 7:23 AM in the morning, and the last departure from Carmarthen is at 7:20 PM which arrives into Slough at 11:11 PM. All services require a transfer, and take on average 3h 59m. The schedules shown below are for the next available departures.

Departing Tuesday, August 11, 2026

9:21 AM → 1:21 PM
4h • 1 change
11:27 AM → 3:23 PM
3h 56m • 1 change
2:20 PM → 6:21 PM
4h 1m • 1 change
4:19 PM → 8:22 PM
4h 3m • 1 change
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Departing Wednesday, August 12, 2026

7:23 AM → 11:21 AM
3h 58m • 1 change
9:21 AM → 1:21 PM
4h • 1 change
11:27 AM → 3:23 PM
3h 56m • 1 change
2:20 PM → 6:21 PM
4h 1m • 1 change
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Departing Thursday, August 13, 2026

7:23 AM → 11:21 AM
3h 58m • 1 change
9:21 AM → 1:21 PM
4h • 1 change
11:27 AM → 3:23 PM
3h 56m • 1 change
2:20 PM → 6:21 PM
4h 1m • 1 change
Show more

Departing Friday, August 14, 2026

7:23 AM → 11:21 AM
3h 58m • 1 change
9:21 AM → 1:21 PM
4h • 1 change
11:27 AM → 3:23 PM
3h 56m • 1 change
2:20 PM → 6:21 PM
4h 1m • 1 change
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Departing Saturday, August 15, 2026

7:24 AM → 11:21 AM
3h 57m • 1 change
9:30 AM → 1:21 PM
3h 51m • 1 change
11:30 AM → 3:21 PM
3h 51m • 1 change
1:30 PM → 5:21 PM
3h 51m • 1 change
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Departing Sunday, August 16, 2026

11:25 AM → 3:21 PM
3h 56m • 1 change
2:15 PM → 6:21 PM
4h 6m • 1 change
4:30 PM → 8:21 PM
3h 51m • 1 change
7:20 PM → 11:11 PM
3h 51m • 1 change

Departing Monday, August 17, 2026

7:23 AM → 11:21 AM
3h 58m • 1 change
9:21 AM → 1:21 PM
4h • 1 change
11:27 AM → 3:23 PM
3h 56m • 1 change
2:20 PM → 6:21 PM
4h 1m • 1 change
Show more

Frequently asked questions

Want to know about travelling from Carmarthen to Slough? 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.