Ticket machines are available along the Abbey Flyer route and a ticket must be purchased before travel else you might have to pay a penalty fair.
If you have an onward connection and have not been able to purchase a ticket by the time you get to Watford Junction, you can buy one there at the excess fare window.
Conductors will accept cash, credit or debit cards. Ticket machines are also available at Watford Junction, Watford North and St Albans Abbey (currently this one is card only).
Weekly season tickets can be purchased from the on-board conductor.
To find the specific price of a ticket for your journey, please visit www.nationalrail.co.uk.
If your train journey is delayed by 15 minutes or more you can claim a refund from London Northwestern via their website.