Cheap flights from the United States to London from $125
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United States to London departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from United States to London
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to London?
The cheapest month to fly to London from United States is in January. Flight prices, which tend to average around $414, are often lower during this time because this is during the off-season. The month of October is another great option to travel to London, with average flight prices from United States averaging around $425.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart from United States to London is on a Tuesday. Travelers who choose to depart for London on a Tuesday will often find tickets for as low as $626. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $661. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.
What is the cheapest time of day to depart on your flight to London?
Flying to London from United States at noon is the least expensive time of day to depart. momondo users have found prices as low as $500 when looking at flights departing at noon. Flights to London are more costly in the evening, with an average ticket price of $665. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest United States to London flight route?
Fly from New York John F Kennedy Intl to London Gatwick for the best United States - London flight prices
How far in advance should I book a flight to London?
You are more likely to see cheaper flights to London from United States when booking 17 weeks ahead of your departure date. In general, you can expect to find flights to London for around $620 when searching 17 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from United States for as low as $555 on momondo.
What cabin class options are available on United States to London flights?
There are 4 cabin classes available to choose from on United States to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from United States to London?
Norse Atlantic UK, Icelandair, and TAP AIR PORTUGAL are the most popular carriers operating from United States to London
What airlines fly to London?
British Airways, Delta and United Airlines are the top three most popular airlines that fly to London from United States according to our data. British Airways is the first choice among our users, with 43% of people opting to fly with this airline when traveling to London. Keep in mind that there are 24 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.
How many flights depart from United States to London on average per day?
340 flights are operational daily from United States to London as of June 2025. The most popular departure time for this route is 7:00PM, with 70% of flights per day taking off in the evening.
How many flights depart from United States to London on average per week?
2,382 flights are operational weekly from United States to London as of June 2025. The most popular departure day for this route is Wed, with 15% of flights per week taking off on this day.
Cheap United States to London flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from United States to London
When did momondo last update prices for flights from United States to London?
Prices for flights from United States to London are updated daily.
How many operators does momondo search for flights from United States to London?
As of June 2025, there are 23 operators available to choose from for flights from United States to London.
How old do you have to be to fly from United States to London?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from United States to London?
Based on momondo bookings for flights between United States and London, the leading plane model is Boeing 777, making up 22.81% of the total bookings. Other popular models include Boeing 787-9 Dreamliner with 14.89%, Boeing 777-200/200ER with 12.85%, and Boeing 777-300ER with 11.86%.
Best airlines flying from United States to London
Compare and see reviews for airlines that fly from United States to London with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $203 | Free Cancellation | Rating 7.3 1,393 reviews | |||
| PriceFrom $245 | Free Cancellation | Rating 7.5 1,628 reviews | |||
| PriceFrom $272 | Free Cancellation | Rating 7.2 2,873 reviews | |||
| PriceFrom $284 | Free Cancellation | Rating 7.2 47 reviews | |||
| PriceFrom $288 | Free Cancellation | Rating 7.4 355 reviews | |||
| PriceFrom $291 | Free Cancellation | Rating 6.8 7,149 reviews | |||
| PriceFrom $324 | Free Cancellation | Rating 7.4 652 reviews | |||
| PriceFrom $340 | Free Cancellation | Rating 7.5 1,466 reviews | |||
| PriceFrom $354 | Free Cancellation | Rating 7.0 102 reviews | |||
| PriceFrom $360 | Free Cancellation | Rating 7.3 2,922 reviews |
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from United States to London?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from United States.
Can I find flights from United States to London with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for United States to London flights to just show those with flexible booking policies.
How can momondo help me find flights from United States to London?
Once all potential United States to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from United States to London right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of United States to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.