Top Airlines Offering the Cheapest Flights to London

Finding cheap flights to London, UK, is easier when you know which airlines consistently offer low prices. Here are some of the top carriers known for providing the cheapest flights to London.

Find Major Airports in London

Familiarizing yourself with London’s major airports before flying is important so you can choose the most suitable airport for your travel needs. Here are the key airports offering convenient access to various destinations.

Heathrow Airport (LHR) is the largest and busiest airport in the UK, located about 14 miles west of central London. It is a major international hub, serving as the primary base for British Airways and a key hub for Virgin Atlantic. Popular landmarks near Heathrow include Windsor Castle, about 7 miles away, which offers tours of the historic royal residence; Thorpe Park, also approximately 7 miles from the airport, a thrilling theme park with numerous rides and attractions; and Kew Gardens, the renowned botanical gardens located about 10 miles from Heathrow.


London Gatwick Airport (LGW) is the UK’s second-largest airport and a major international gateway for Greater London, located near Crawley in West Sussex. Major airlines operating from Gatwick include British Airways, easyJet, Norse Atlantic Airways, TUI Airways, and Wizz Air. The airport boasts excellent transport links, like the Gatwick Express train to London Victoria, and offers various amenities to enhance the passenger experience.


London City Airport (LCY) is the closest airport to central London, just 9.5 kilometers (6 miles) east of the city center. The airport is served by 12 airlines, including British Airways, KLM, Lufthansa, Swiss International Air Lines, and Luxair, offering flights to over 50 destinations in Europe and the UK. Popular routes include Amsterdam, Frankfurt, Zurich, and Edinburgh. Despite its small size, the airport provides quick and efficient transit through security and baggage claim, making it a top choice for travelers with tight schedules.


London Luton Airport (LTN) is an international airport in Luton, Bedfordshire, England. The airport is a hub for several airlines, including easyJet, Wizz Air, Ryanair, TUI, FLYONE, SunExpress, and El Al, offering flights to various destinations across Europe, the Middle East, and North Africa. Popular routes from Luton include Amsterdam, Málaga, Lisbon, Belfast, and Dublin. Both easyJet and Wizz Air operate many flights from Luton, making it a key hub for these airlines.


London Stansted Airport (STN) is the fourth-busiest airport in the United Kingdom, located approximately 42 miles northeast of central London. Stansted Airport is home to airlines, including major carriers like Ryanair, easyJet, Jet2, and TUI Airways. Popular landmarks near Stansted Airport include Hatfield Forest (about 3 miles away), a beautiful ancient woodland perfect for walks and picnics; the historic market town of Bishop’s Stortford (approximately 5 miles from the airport)

Flights to London Snapshot

Economy Class

OneAir - Travel the world for less


Seat - Cheap Flights - OneAir


Business Class

OneAir - Travel the world for less


Business Class - Cheap Flights - OneAir


The Best Time to Visit London

The best time to visit London is spring (March to May) and fall (September to October). During these seasons, the weather is mild, and the city’s parks and gardens are in full bloom or adorned with autumn leaves, creating a picturesque setting for sightseeing and outdoor activities.

June, July, and August are the peak summer months in London, ideal for outdoor activities and tourism, leading to higher demand and prices for flights and accommodations. December sees a spike in prices due to the Christmas and New Year holidays, drawing many visitors despite the colder weather.


January and February are the off-season winter months with fewer tourists, leading to discounted rates for hotels and flights. March, April, September, October, and November are shoulder seasons with milder weather and fewer crowds, offering lower travel costs.

Book Cheap Flights
Cheapest months to fly

January and February

Book Cheap Flights
Most Expensive Months to Fly

June to August

Compare Prices

Here’s a breakdown of the airfare when flying to Heathrow Airport (LHR) from Boston Logan International Airport (BOS).

No Data Found

Frequently Asked Questions

To find a cheap flight to London, use OneAir. Sign up on OneAir to access exclusive flight deals and discounts unavailable to regular users. 

Spirit and Norse Atlantic UK offer cheap flights from Seattle to London, while Icelandair offers cheap flights from Denver to London.

Royal Air Maroc offers cheap flights from Lagos to London (LHR), while KLM offers cheap flights from Liberia to London (LHR).

Norse Atlantic UK, JetBlue, Virgin Atlantic, Air France, Delta, KLM, American Airlines, British Airways, United, Austrian, Lufthansa, and Brussels Airlines offer direct flights from Chicago (ORD), Miami (MIA), New York (JFK), Seattle (SEA), and Los Angeles (LAX).

Japan Airlines and ANA offer direct flights to London from Japan (HND), while Vueling, British Airways, Iberia, and Ryanair UK offer direct flights from Barcelona (BCN).

Nonstop flights from Detroit (DTW) and Washington (IAD) take around 7 to 8 hours, while flights from Florida (FLL) take around 11 hours.

Among the most popular destinations are the Tower of London, renowned for its rich history, and the Crown Jewels. The London Eye offers stunning panoramic views of the city from its observation wheel, while Buckingham Palace is famous for the Changing of the Guard ceremony. Other must-visit sites include Tower Bridge, an architectural marvel with its glass walkways; the British Museum, housing an extensive collection of art and artifacts; and St. Paul’s Cathedral, known for its magnificent dome and historic significance. Trafalgar Square is a vibrant public space surrounded by cultural landmarks like the National Gallery.  

The London Underground, or “the Tube,” is the most efficient way to travel, with 11 lines covering extensive routes across the city. Buses, including the iconic red double-deckers, offer scenic and accessible travel options with a flat fare. The Docklands Light Railway (DLR) serves the eastern parts of London with driverless trains.

EU, EEA (Norway, Iceland, Liechtenstein), and Swiss nationals can visit the UK without a visa for short stays, but they need a valid passport. Citizens of the U.S., Canada, Australia, and some Commonwealth nations can travel to the UK for tourism without a visa if they have a valid passport and meet immigration rules.

Depending on the state, London is 5 to 8 hours ahead of the USA.

Discover London

Looking for cheap flights to London? OneAir makes it easy to discover incredible flight deals to destinations around the world. Follow these simple steps to start saving on your next trip.


  • Set your departure airports on OneAir. Choose your preferred departure airports, and we’ll search for the cheapest flights from those cities to London. OneAir offers deals from over 50 major US airports, so you can find the most convenient and affordable options. 
  • Be flexible with your travel dates. If your schedule allows, use our “Explore” or “Add Destinations” feature to find the most affordable days to fly to London. Shifting your dates by just a day or two can often result in significant savings.
  • Turn on your notifications. We’ll notify you via email or push notification whenever the price for your selected route is at its lowest. This way, you’ll never miss a deal.
  • Compare flight options from multiple providers. Choose the cheapest, fastest, or most convenient flights to London based on your priorities.
  • Filter for direct flights. If you prefer nonstop service to London, simply tick the “Nonstop” box when searching. We’ll show you all available nonstop routes, so you can avoid lengthy layovers.
  • Get the best unpublished deals. Dreaming of a luxurious journey to London? We also find the best deals on Premium Economy, Business, and First Class fares. Compare prices across all cabin classes – you might be surprised by an affordable premium seat.
  • Expand your search to nearby airports. Unlock even more deals by searching for flights to London from nearby airports. This will show you flight prices from alternative departure airports close to your origin city.

Book a complete travel package. Once you’ve found your perfect flight to London, why not add a hotel room or rental car? OneAir also offers exclusive hotel, car, and activity deals, so you can save even more on your entire trip.


Discover New Destinations with the “Explore” Tab. Not set on London? Use our “Explore” search to find the cheapest flights from your city to anywhere in the world. You might just discover your next dream vacation spot!