There is an Oyster Card for children aged between 11 and 15, but you have to apply for it in advance and supply a photo. I think it's aimed at people who live i

There is an Oyster Card for children aged between 11 and 15, but you have to apply for it in advance and supply a photo. I think it's aimed at people who live in/regularly visit London: https://tfl.gov.uk/fares/free-and-discounted-travel/11-15-zip-oyster-photocard https://tfl.gov.uk/fares/free-and-discounted-travel/11-15-zi... The other option is a child's paper ticket - those can be purchased without having to apply for anything in advance. Adult fares via Oyster/contactless may still be cheaper than a child's paper ticket. You can use the Single fare finder to check the price of a specific journey - for both adult/child: https://tfl.gov.uk/fares/find-fares/tube-and-rail-fares/single-fare-finder https://tfl.gov.uk/fares/find-fares/tube-and-rail-fares/sing... If the Oyster/contactless adult fare is cheaper than a child's paper ticket, you could just use a standard Pay as you go Oyster card: https://tfl.gov.uk/fares/how-to-pay-and-where-to-buy-tickets-and-oyster/pay-as-you-go/oyster-pay-as-you-go https://tfl.gov.uk/fares/how-to-pay-and-where-to-buy-tickets...