Cheap Flights to London (LHR)
Compare hundreds of airlines in one search to find the lowest fare to London, plus the cheapest months to fly and the best things to do across the city.
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Overview
How to Find Cheap Flights to London
London is the most-connected transatlantic destination from the US, served by multiple airports and a long list of carriers. That competition means cheap flights to London are very findable, the key is comparing every airline and every London airport at once.
Use the search below to compare flexible dates across hundreds of airlines, check the pricing calendar for the cheapest windows, and book the tours and attraction tickets that make a London trip ahead of time.
When to go
Cheapest Time to Fly to London
London fares peak in summer and around the holidays, and fall sharply in the cooler, quieter winter months.
Cheapest months
January to March and November (outside the holidays) bring the lowest transatlantic fares, when weather is cool and tourism slows.
Summer is peak
June through August is high season with the best weather, the biggest crowds, and the highest fares and hotel rates.
Most expensive
Summer, Christmas, New Year, and Easter are peak. Book those 2 to 5 months ahead for the best transatlantic fares.
Best booking window
For flights to London, book roughly 2 to 4 months ahead. A price alert helps catch the frequent transatlantic fare sales.
Popular routes
Top Routes to London
Tap any route to see live fares to London from that city. Don't see yours? Use the search above for any departure airport.
Once you land
Best Things to Do in London
London's icons book up, and skip-the-line tickets are worth it. Day trips to nearby sights are easy to arrange ahead too.
Landmark tickets
The Tower of London, London Eye, and Westminster Abbey all offer skip-the-line tickets that save hours in peak season.
Hop-on bus and river tours
Classic sightseeing bus passes and Thames river cruises are easy to book ahead and cover the main sights.
West End shows
Theatre tickets for West End shows are cheaper and better-seated when booked in advance.
Day trips
Tours to Stonehenge, Bath, Oxford, and Windsor Castle leave daily from central London, transport included.
FAQ
London Flight Questions, Answered
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The three things that actually cost you money next
The fare is usually the part people optimise hardest and the part they save least on. Roaming, airport transfers and car hire are where trips quietly leak money, and all three are cheaper if you sort them before you fly.
Get an eSIM before you land
Carrier roaming runs $10 to $15 a day. A local data eSIM is usually a few dollars for the whole trip, installs before you leave, and works the moment you land. This is the single easiest saving on this list.
Check eSIM prices →Book the airport transfer
Airport taxi ranks are where tired travellers get overcharged, especially arriving late or without the language. A pre-booked transfer is a fixed price agreed before you fly, with a driver waiting.
Price a transfer →Hire a car, if you're leaving the city
Worth it if the trip involves coast, countryside or day trips. Skip it if you're staying in a city with decent transit, where a car is mostly a parking problem. Book early: airport desks are the most expensive way to do this.
Compare car hire →These are affiliate links. We earn a commission if you book through them, at no extra cost to you. We only list things we would use ourselves.