When to go
May, June, and September are the sweet spot — long daylight, mild temperatures (60s–70s), and you’ve missed the peak July/August school-holiday crowds. November to February is cheap and lightly attended but the weather is grey and short-day. December has the Christmas markets and lights working in its favour.
Getting there
London is the most competitive transatlantic market in the world — six US carriers and British Airways fly JFK and EWR daily, often with 8–10 nonstops per day on each. That competition keeps fares low: $400–$700 round-trip in shoulder season is normal. Most flights land at Heathrow (LHR); a few use Gatwick (LGW). Heathrow is 45 min into central London on the Elizabeth line (£12).
Visa & entry
US, EU, Australian, and Canadian passports do not need a visa for stays under six months — but as of 2025 the UK requires an Electronic Travel Authorisation (ETA), £10, valid two years. Apply online at gov.uk/eta before you fly; approval is usually instant but allow 72 hours just in case.
Money
British Pound (GBP) trades around 0.78 per USD ($1 = £0.78). Contactless cards work on every bus, tube, train, and most cabs — link a Visa or Mastercard to Apple Pay or Google Pay and you’re set. Cash is rarely needed. Tipping is light: 10% if not already added at restaurants, round up cabs.
What to see
A first trip needs at least 5 days: a museum day (British Museum or V&A — both free), Westminster and the Tower of London, an evening at a West End show, a day trip to Oxford or Bath, and a Sunday roast in a proper pub. The London Pass is rarely worth it unless you’re cramming five paid attractions into one day.