Carmarthen to Heathrow Terminal 5 Trains

Carmarthen to Heathrow Terminal 5 trains

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Trip Overview

The average train between Carmarthen and Heathrow Terminal 5 takes 4h 50m and the fastest train takes 4h 9m. There is a train service every few hours from Carmarthen to Heathrow Terminal 5. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.

4h 50m
Duration: 237 mi
Distance: £136
Average price: Hourly
Frequency

Train

best

Take the train from Carmarthen to Swanseatrain Milford Haven - Shrewsbury / ...
Take the train from Swansea to London Paddingtontrain Swansea - London Paddington / ...

4h 58m

£98–208

Carmarthen to Heathrow Terminal 5 train times

Trains run hourly between Carmarthen and Heathrow Terminal 5. The earliest departure is at 4:37 AM at night, and the last departure from Carmarthen is at 10:43 PM which arrives into Heathrow Terminal 5 at 7:46 AM. All services require a transfer at Swansea and take an average of 4h 50m. The schedules shown below are for the next available departures.

Departing Saturday, November 7, 2026

9:34 PM → 11:17 AM
Arrives next day
13h 43m • 2 changes

Departing Sunday, November 8, 2026

9:34 AM → 1:47 PM
4h 13m • 2 changes
10:34 AM → 2:46 PM
4h 12m • 2 changes
11:25 AM → 3:47 PM
4h 22m • 2 changes
12:31 PM → 4:47 PM
4h 15m • 2 changes
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Departing Monday, November 9, 2026

4:37 AM → 8:46 AM
4h 9m • 2 changes
5:32 AM → 9:46 AM
4h 14m • 2 changes
6:52 AM → 11:01 AM
4h 9m • 2 changes
7:23 AM → 11:46 AM
4h 23m • 2 changes
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Departing Tuesday, November 10, 2026

4:37 AM → 8:46 AM
4h 9m • 2 changes
5:32 AM → 9:46 AM
4h 14m • 2 changes
5:33 AM → 10:16 AM
4h 43m • 2 changes
6:52 AM → 11:01 AM
4h 9m • 2 changes
Show more

Departing Wednesday, November 11, 2026

4:37 AM → 8:46 AM
4h 9m • 2 changes
5:32 AM → 9:46 AM
4h 14m • 2 changes
5:33 AM → 10:16 AM
4h 43m • 2 changes
6:06 AM → 10:46 AM
4h 40m • 2 changes
Show more

Departing Thursday, November 12, 2026

4:37 AM → 8:46 AM
4h 9m • 2 changes
5:32 AM → 9:46 AM
4h 14m • 2 changes
5:33 AM → 10:16 AM
4h 43m • 2 changes
6:52 AM → 11:01 AM
4h 9m • 2 changes
Show more

Departing Friday, November 13, 2026

4:37 AM → 8:46 AM
4h 9m • 2 changes
5:32 AM → 9:46 AM
4h 14m • 2 changes
5:33 AM → 10:16 AM
4h 43m • 2 changes
6:52 AM → 11:01 AM
4h 9m • 2 changes
Show more

Departing Saturday, November 14, 2026

4:37 AM → 8:46 AM
4h 9m • 2 changes
5:28 AM → 9:46 AM
4h 18m • 2 changes
6:53 AM → 11:16 AM
4h 22m • 2 changes
7:24 AM → 11:46 AM
4h 22m • 2 changes
Show more

Frequently asked questions

Want to know about travelling from Carmarthen to Heathrow Terminal 5? 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.