Fifteen new foreign exchange bureaux are being opened at Heathrow by provider Moneycorp as part of a staggered handover from American Express.
Five units and four further ATMs offering euros and US dollars have started trading in Terminal 3, with more units to follow at Terminal 4 this week and Terminal 1 on November 27.
The bureaux openings follow the takeover from American Express of 10 landside and airside bureaux at Terminal 5 in August.
The bureaux at Heathrow will also allow customers to pick up money which has been ordered online.
The new openings will see Moneycorp serve an expected 2 million customers at Heathrow a year, and brings its total retail estate to 25 bureaux.
Retail director Matthew Leonard said: “The opening of these new bureaux marks the latest phase of the continuing expansion of our retail business.
“As we’ve already shown at T5 earlier this year, we are committed to growing our retail offering, and at the same time modernising the look and feel of foreign exchange to create a more open experience for customers.”