Do British airports accept euros?
Do British airports accept euros? They do but the exchange rate might not be great and you will get change back in UK currency. You would get a better exchange rate changing them into USD before you leave the US than spending them at Heathrow.
Can I exchange euros for pounds at Heathrow Airport?
Travelex offers a range of services at Heathrow, including foreign currency exchange, prepaid currency cards, travel insurance and international payments.
Can you use euros at Heathrow duty free?
Some of the shops and services at LHR will accept euro, with two substantial caveats: the exchange rate won't be brilliant, and shops very likely won't accept coins, just euro notes.