Fares for Heathrow Express are being more than halved as the rail link adopts an airline-style yield management system.
Rates drop from £12.50 to a lead in of £5.50 one-way when booked online.
The price drop coincides with the airport rail firm introducing a new multi-lingual website and app.
A “guaranteed number” of discounted tickets will be released for every day of travel for advanced online purchase due to a new dynamic pricing structure, according to the company.
“Similar to an airline style yield management system, this increased availability of discounted tickets beyond weekends, extends the value offered by the transport provider that has frozen prices since 2018 and offers a permanent kids travel free initiative,” Heathrow Express said.
The cheapest weekday travel available was previously £12.50 when booked 90 days in advance rising to £16.50 for bookings up to 14 days before travel.
API technology integrated with various partner booking systems for fast processing of ticket requests from corporate clients or trade partners is also being upgraded.
The portal is being piloted with an expected full release in the new year. The system will then be introduced to third parties in the trade such as TMCs, ground transfer operators and airlines to integrate Heathrow Express tickets into their booking systems.
Director Les Freer said: “Rolling out our £5.50 one-way fare across the week means thousands more customers can travel for less with Heathrow Express.
“Our continued investment in technology will improve the customer experience for both trade partners and end users making the booking process more personalised, quicker and simpler to use.”