London is too big to finish, so the real skill is choosing what to skip. This guide is written for a first or second visit of 3 to 5 days in 2026. The short version: pay for transport with a contactless card or your phone instead of paper tickets, stay within a 10 minute walk of a Zone 1 or Zone 2 station, book the few timed-entry sights before you fly and sort your mobile data before you land.
Distances mislead almost everyone here. Central London looks enormous on the Underground map because that map is a diagram rather than a scale drawing, so visitors ride 2 stops between stations that sit 8 minutes apart on foot. Once you accept that Covent Garden, Soho and the South Bank are within walking range of each other, your days stretch out.
What follows covers when to go, the airport links, how fares really work, the sights that earn their place, where to eat well and how to stay online.
London travel guide basics for 2026
Start with the paperwork. The United Kingdom now runs an Electronic Travel Authorisation (ETA) scheme for many visa-exempt visitors, so check your own nationality on the official GOV.UK site before you book anything non-refundable, because the covered countries have been added in stages.
Money is simpler. The currency is the pound sterling and London is close to cashless: buses take no cash at all and most market stalls take cards.
- Check the Electronic Travel Authorisation requirement for your passport before booking flights.
- Bring 1 contactless bank card or phone wallet and use it for every journey.
- Plug sockets are the 3 rectangular pin Type G, running on 230 volts.
- The emergency number is 999, and 112 also works from any phone.
- Traffic drives on the left, so look right first at every kerb.
When to go and what to expect
There is no wrong month, only different trade-offs. Late spring and early autumn balance mild days with long light and gardens that look the way the postcards promise. July and August bring the biggest crowds and the highest room rates. Winter is dark by mid afternoon, yet museums are quiet and the West End theatre scene is in full swing.
Rain is a year-round possibility rather than a season, so pack a waterproof layer in any month. Weekends change the city more than the weather does: Sunday shopping hours are short, the City of London empties out and several of the best markets trade on only 1 or 2 days a week. Accommodation is the biggest line in any budget here, and moving 1 zone out often buys a better room.
Getting in from the airport
London has 5 airports and each has a sensible public transport answer, so a taxi is rarely fastest and never cheapest. Transport for London (TfL) coordinates most of the links, and its journey planner is worth keeping open on arrival day.
Heathrow, Gatwick and Stansted
Heathrow sits on the Piccadilly line and the Elizabeth line, plus the Heathrow Express to Paddington. The Piccadilly line is the slow, cheap option that drops you into the West End. The Elizabeth line is the sweet spot: fewer stops, luggage space and a run through the centre. Gatwick is a mainline rail journey rather than a Tube ride, with the Gatwick Express to Victoria alongside slower Thameslink services reaching London Bridge and St Pancras. Stansted connects by the Stansted Express to Liverpool Street.
Luton and London City
Luton pairs a shuttle rail link with trains to St Pancras, useful if you are continuing by Eurostar. London City is the easiest of the lot: the Docklands Light Railway (DLR) runs from a station attached to the terminal and reaches Bank in minutes. Buy nothing in advance, because the contactless card that opens the barriers works out the fare for you.
Tube tips that actually save money
The fare system rewards a little knowledge. Tap the same contactless card or phone wallet at the start and end of every journey and the system applies a daily cap, then a weekly cap if you keep using that identical payment method. Mixing your card and your phone on different days breaks the weekly cap, which is the mistake that quietly costs visitors the most.
- Touch in and touch out on the Tube, the Elizabeth line, the DLR, the Overground and suburban rail.
- Touch in only on buses, where you never tap out.
- Use a single payment method for the whole trip so capping works properly.
- Stand on the right on escalators and let people walk past on the left.
- Avoid the network between roughly 08:00 and 09:30 BST if your plans allow it.
Buses are the underrated half of the network. They are slower, but you see the city and the bus fare cap is lower than the mixed-mode cap. Night buses run across the whole city, and selected Tube lines add a night service on Friday and Saturday nights. Build another habit: check whether the next stop is genuinely faster underground. Leicester Square to Covent Garden is the shortest hop on the network and takes longer by train than on foot.
Top sights worth your time
Westminster and the river
Walk this stretch rather than ride it. Start at Westminster, take in the Houses of Parliament and the clock tower holding Big Ben, then cross the bridge to the South Bank and turn left along the water. In a flat 45 minutes you pass the London Eye, the Southbank Centre, the National Theatre, the reconstructed Globe theatre and Tate Modern, ending at Borough Market. Westminster Abbey, the Tower of London and the Churchill War Rooms are the paid sights that justify the queue, and all 3 sell timed tickets.
Museums and galleries
Permanent collections at the national museums are free, which is the best single thing about sightseeing here. The British Museum, the National Gallery, the Natural History Museum, the Science Museum, the Victoria and Albert Museum and both Tate galleries work that way, with charges only for major temporary exhibitions. Treat them as 90 minute visits. Pick 2 or 3 rooms, see them properly, then leave before museum fatigue sets in.
Parks and neighbourhoods
London is a city of villages and the character changes every 15 minutes on foot. Greenwich gives you maritime history, the observatory and the best skyline view in the city. Hampstead Heath offers swimming ponds and woodland that feels genuinely rural. Notting Hill, Shoreditch, Brixton and Peckham each reward an unstructured afternoon, and Richmond Park has free-roaming deer.
Eating and drinking without a booking
London eats well at every price point and the best meals are rarely the most expensive. Borough Market deserves its reputation, though it is calmer on a weekday morning. Beyond it, follow the communities: salt beef beigels on Brick Lane, Turkish grills along Green Lanes, West African cooking in Peckham and Chinatown just off Shaftesbury Avenue.
Traditional dishes still hold their own. A full English breakfast, fish and chips, a Sunday roast in a pub with a fire and pie and mash in a tiled east London shop are all worth doing once. Pubs work differently from bars elsewhere: order and pay at the bar, carry your drink to a table and tip nothing. Restaurants often add a discretionary service charge you may ask to have removed.
Safety and common pitfalls
London is a safe city for visitors by any reasonable measure, and violent crime is not a realistic concern for a tourist. Opportunistic theft is the genuine risk. Phones get snatched from hands on busy pavements and from tables outside cafes, so hold your handset only when you need it and stand back from the kerb when you check a map.
- Use licensed black cabs or a booked minicab, never a driver who approaches you in the street.
- Keep bags zipped and in front of you on crowded Tube platforms.
- Treat street games and clipboard petitions in tourist areas as distractions.
- Save your accommodation address offline in case you lose signal underground.
eSIM for London to stay connected
You have 4 realistic options and they are not equal. Public Wi-Fi is everywhere, from cafes to Underground platforms, but it is patchy in tunnels, needs repeated logins and is the wrong place to bank. A local prepaid card is good value for a stay of several weeks, though it means finding a shop, swapping your SIM and losing your usual number. Carrier roaming from home is the easiest and usually the most expensive. A travel embedded SIM (eSIM) sits in the middle: you install it before you fly and it connects the moment you land.
| Option | Best for | Watch out for |
|---|---|---|
| Public Wi-Fi | Hotels and long cafe stops | Gaps underground and weak security |
| Local prepaid SIM | Stays of several weeks | Shop visits and losing your own number |
| Carrier roaming | Doing nothing before you travel | Daily charges that stack up fast |
| Travel eSIM | Trips of a few days to a month | Needs an unlocked, compatible device |
Qrispy fits the last row. You install a single Qrispy eSIM, keep it on the device permanently and buy data for it in 3 ways. The pay as you go Global Wallet holds credits that never expire and works across 210+ countries, with the rate for each destination shown before you confirm. Fixed Plans cover 3, 7, 15 or 30 days for a single country or region. Unlimited Data Plans run in 90+ countries, with fair use or temporary speed management during heavy congestion. Unlimited hotspot is included.
Set it up the way a local sets up a second line. Keep your home SIM active for calls and one-time passcodes, make the Qrispy line your mobile data line, then turn Data Roaming on for Qrispy and off for your primary SIM. The Qrispy line carries data rather than a phone number, so calls go over Wi-Fi Calling or apps such as WhatsApp. Unsure how much a week of maps and messaging needs? Run the numbers with the Qrispy data usage calculator, then compare Qrispy eSIM plans for the United Kingdom against your own carrier’s quote.
A quirk is worth knowing. Smart IP Routing sends your traffic out through the nearest Qrispy Point of Presence (PoP) for lower latency, so your IP address can appear to be in a nearby country. Coverage and data use are unaffected, but a streaming service or a bank login may treat you as being somewhere else. Travel Buddy, the in-app assistant, suggests routes between the areas above and flags local safety points. For live fares and network status, Transport for London is the only source worth trusting.
Frequently asked questions
How many days do you need?
Give London 4 full days on a first visit. That covers Westminster and the river, 2 or 3 museums, a market morning, an evening in the West End and 1 outlying area such as Greenwich. With 3 days you will still see plenty, but you will be choosing between the Tower of London and a proper wander through the east.
Is the Tube or the bus better?
Both, for different jobs. The Tube wins on speed across longer distances and under the river. Buses win on cost, on views and on short hops of 2 or 3 stops where the walk down to a platform eats your time saving. Use the Tube in the morning when you are covering ground and buses later when you are not rushing.
Do you still need an Oyster card?
No. A contactless bank card or a phone wallet taps the same readers, calculates the same pay as you go fares and applies the same daily cap, so most visitors never buy an Oyster card at all. An Oyster still helps if your bank charges foreign transaction fees or if you want to hand a spare card to a travelling companion.
Is London expensive for a visitor?
Accommodation is expensive and almost everything else is controllable. National museums are free, parks cost nothing, markets feed you cheaply and the fare cap limits what a heavy transport day can cost. Visitors who overspend usually do it on hotels booked late, on taxis instead of trains and on roaming charges they never checked before flying.
What is the best month to visit?
May, June and September give the strongest combination of long daylight, mild weather and gardens in good condition. April and October are quieter and still pleasant. If you want the museums almost to yourself and do not mind dark afternoons, come in late January or February, when hotel rates sit at their lowest point of the year.
Will your phone work in London?
Yes, if it is unlocked and supports the local network bands, which almost every recent handset does. Coverage is strong across the city, including most Underground platforms and a growing number of tunnels. The question is what you pay for it, so check your carrier’s roaming terms or install a travel eSIM before you fly rather than at the airport.
Stay connected anywhere with Qrispy eSIM
Stay connected in 210+ countries with Global Wallet, Fixed Plans and Unlimited Data. No contracts, no roaming fees, no expiry. Download the Qrispy eSIM app today and start your journey.
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