Low fare calendar
Low Fare Calendar London — Cheapest Days to Fly
See the cheapest round-trip fare for every day to London (LHR) at a glance, then pick your dates and go straight through to booking.
Round-trip fares to London (LHR).
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When is the cheapest time to fly to London?
Flight prices to London move far more than most travelers expect. The same route, booked for a Tuesday instead of a Friday, routinely costs a third less — and across a full year the gap between the cheapest and most expensive month is often more than double. A low fare calendar makes that visible: instead of checking dates one at a time, you see the whole month at once and can spot where the cheap days actually fall.
On this route, January is typically the cheapest month and July the most expensive. One of the densest route networks in the world, so fares stay low year-round outside school holidays and the December peak. That seasonal shape is the single biggest factor in what you pay, and it is worth planning around before you start comparing individual airlines.
The day of the week matters almost as much. Midweek departures — Tuesday and Wednesday in particular — are consistently cheaper than weekend ones, because leisure demand clusters around Friday evenings and Sunday returns. Flying out and back midweek regularly halves the fare for exactly the same trip. If your dates are flexible by even a day or two, that flexibility is usually worth more than any loyalty programme or discount code.
Booking lead time is the third lever. For London, six to eight weeks ahead is the reliable window, and two to three months for peak-season travel. Fares generally rise as the aircraft fills, so the last-minute bargain is far rarer than its reputation suggests — especially in July, when planes sell out regardless of price. Off-season, prices often stay flat until close to departure, which gives you more room to wait.
London is served by British Airways, easyJet, Ryanair, Norwegian and Virgin Atlantic, flying into Heathrow (LHR), with Gatwick, Stansted and Luton nearby, with a flight time of the default origin for this calendar. The calendar above draws on cached round-trip fares from real searches, so the days shown as cheap are ones travelers were genuinely quoted. Prices are in US dollars and update daily. Empty squares simply mean no fare has been cached for that day yet — not that no flight exists.
Good to know
Flying to London — your questions answered
- When is the cheapest time to fly to London?
- January is typically the cheapest month to fly to London, and July the most expensive. One of the densest route networks in the world, so fares stay low year-round outside school holidays and the December peak. The calendar above shows the actual cached fare for each day, so you can see where the cheap dates fall rather than relying on the seasonal average.
- Which day of the week is cheapest to fly to London?
- Tuesday and Wednesday departures are usually the cheapest, with Friday evenings and Sunday returns the most expensive. On short-haul routes, shifting a trip by a single day either side of the weekend often saves more than switching airline.
- How far in advance should I book flights to London?
- Six to eight weeks ahead is the reliable window for most routes, and two to three months for long-haul or peak-season travel. Booking very late occasionally works on quiet routes, but for July departures the fare almost always rises as the aircraft fills.
- Which airlines fly to London?
- British Airways, easyJet, Ryanair, Norwegian and Virgin Atlantic all serve London. Flight time is the default origin for this calendar. Fares in the calendar are the cheapest cached round trip for each date, whichever carrier is operating it.
- Which airport does London use?
- Heathrow (LHR), with Gatwick, Stansted and Luton nearby. Prices in the calendar are round trip and shown in US dollars; selecting a departure and a return takes you straight through to the booking site with both dates filled in.