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Trains from Cardiff Bay to Heathrow Airport

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Great Western Railway
Heathrow Express

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  1. Home
  2. Train times
  3. Cardiff Bay to Heathrow Airport

Trains to Heathrow Airport from Cardiff Bay

First train

05:56

Last train

00:11

Departure stationCardiff Bay
Arrival stationHeathrow Airport
Journey time

From 2h 44m

Distance

117 miles (188 km)

Frequency

31 trains per day

Changes

2 changes

Train operators

Great Western Railway, Heathrow Express, Transport for Wales

What are the train times from Cardiff Bay to Heathrow Airport?

Check out the next trains departing from Cardiff Bay to Heathrow Airport for Tuesday 3rd November 2026 using our handy timetable below, including platform and live travel information. You can view the full day timetable or search for a different date here.
DepartsArrivesDuration
11:5615:013h 5m, 3 changes
12:2615:313h 5m, 3 changes
12:5616:013h 5m, 3 changes
13:2616:313h 5m, 3 changes
13:5616:462h 50m, 3 changes
14:2617:313h 5m, 3 changes
14:5618:023h 6m, 3 changes
15:2618:323h 6m, 3 changes
15:5619:023h 6m, 3 changes
16:2619:313h 5m, 3 changes

What are the train times from Cardiff Bay to Heathrow Airport?

Get from Cardiff Bay to Heathrow Airport in as little as 2 hours 44 minutes on the fastest trains, so you can make the most of your time.

The average train journey from Cardiff Bay to Heathrow Airport takes around 4 hours 48 minutes. There are around 31 trains that operate on this route daily.

As there are no direct trains between Cardiff Bay and Heathrow Airport, you'll need to make 2 changes.

Trains on this route are operated by Great Western Railway, Transport for Wales and Heathrow Express.

Booking in advance often results in cheaper ticket prices.

With our Journey Planner, you can check live train times, compare prices and check routes.

What do people frequently ask about the train journey from Cardiff Bay to Heathrow Airport?

Want to know more about your journey from Cardiff Bay to Heathrow Airport? We've compiled some of the most frequently asked questions by our customers to help you plan your journey.

How do I travel from Cardiff Bay to Heathrow Airport?

You can get from Cardiff Bay to Heathrow Airport by train in 4 hours and 48 minutes on average, with the fastest journeys taking just 2 hours and 44 minutes. Check out our Journey Planner for more details.

How long does the train from Cardiff Bay to Heathrow Airport take?

The average journey time by train between Cardiff Bay and Heathrow Airport is 4 hours and 48 minutes, with around 31 trains per day running on this route. The journey time may be longer on weekends and holidays, so use our Journey Planner on this page to search for a specific travel date.

What's the fastest journey time between Cardiff Bay and Heathrow Airport by train?

The fastest journey time by train from Cardiff Bay to Heathrow Airport is 2 hours and 44 minutes.

Can you take a train directly from Cardiff Bay to Heathrow Airport?

No, there are no direct train services from Cardiff Bay to Heathrow Airport. Travelling from Cardiff Bay to Heathrow Airport by train will require a minimum of 2 changes.

How do I find cheap train tickets from Cardiff Bay to Heathrow Airport?

As most UK train companies increase their prices as the departure date approaches, our Trainline team of experts have put together these tips to help you find the cheapest tickets.

1. Sign up to Ticket Alert

If you're planning a trip more than 12 weeks ahead, sign up to our Ticket Alert to get notified when Advance tickets are released for your travel date.

2. Use a Railcard

National Railcards offer a 1/3 off eligible train tickets in the UK and can be a great investment if you travel throughout the year. Buy one with us and you'll be able to store it digitally in our app, so you'll always have it on your travels.

3. Book split tickets

Our handy feature SplitSave will 'split' your train journey into multiple tickets, which can be much cheaper than buying a single ticket. Find out more about split tickets.

4. Travel Off-Peak

If you can be flexible with your travel times, Off-Peak and Super Off-Peak tickets are usually cheaper in the UK. Generally, Off-Peak times are any time at weekends and outside of Monday to Friday morning and evening rush hours.

5. Consider a Season Ticket

Best for commuters, if you catch a train on the same route more than 3 times per week, you could save money with a Season Ticket. With annual, monthly, weekly and flexi options available, find out if a Season Ticket for Cardiff Bay to Heathrow Airport is right for you.

For more money-saving tips on UK and European train travel, read our cheap train tickets guide.

§Advance adult single fare. Excludes booking fee. Prices seen by Trainline customers in the last 30 days. Availability limited.
† Average savings on advance fares booked at least one week before day of travel vs Anytime fares purchased on day of travel. Subject to availability. Excludes coach.

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