Heathrow is the UK's busiest international gateway: long-haul hubs, premium shopping, and currency desks in every terminal.
Airport currency desks are built for last-minute convenience, not the best exchange rate. Walk-up prices are often several percentage points weaker than ordering online for collection or delivery from a mainstream UK travel money provider.
That is not a reason to panic if you forgot euros — it is a reason to buy the minimum you need at the terminal and fund the rest of your trip with competitive cards or cash you ordered before travel.
Getting to London Heathrow
Elizabeth line and Heathrow Express (and the Piccadilly line) connect to central London. Coaches serve regional cities. Leave a buffer for terminal transfers if you connect between flights.
Terminals, queues and where rates bite
After security and in arrivals, you are a captive audience. Spreads tend to be widest where time pressure and long queues are highest — especially at peak holiday banks.
If you must use a bureau, treat it as a small top-up (taxi money, first meal) rather than your whole holiday budget.
Better value before you reach the airport
- Run our holiday money comparison a few days before travel and choose a provider with a clear total cost (rate, fees, delivery or collection).
- If you mainly use a card abroad, still carry a modest cash buffer for tips, shuttles and small traders — see our euro and US dollar guides if they match your destination.
- Heathrow's scale means more choice of bureaux — but also more temptation to leave currency to the last 100 metres. Compare online first so you recognise a fair walk-up rate if you need one.
Parking, hotels and the rest of the airport spend
Airport parking*, lounges* and on-airport hotels are usually better value prebooked. Locking these in when you book flights keeps more of your budget for the trip itself.
Related: All UK airport guides · Holiday extras