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How to get the cheapest flight ticket from Washington, D.C. 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 month of January is, on average, the cheapest month to fly to London from Washington, D.C., with most prices found around R11 948. If you are unable to visit London during the month of January, then departing from Washington, D.C. during the month October is also very affordable. Most momondo users find prices during this month for around R12 153.
What is the cheapest day to depart on your flight to London?
The cheapest day to depart on your flight to London is on a Monday when prices can be found for as low as R18 492. This is often the case because there is less demand to fly during this day of the week. On the other hand, Tuesday is the most expensive day to depart from Washington, D.C. because it is more convenient for both business and leisure travellers. As a result, prices tend to be around R29 671.
What is the cheapest Washington, D.C. to London flight route?
Fly from Washington, D.C. Dulles Intl to London Heathrow for the best Washington, D.C. - 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 Washington, D.C. when booking 14 weeks ahead of your departure date. In general, you can expect to find flights to London for around R14 347 when searching 14 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from Washington, D.C. for as low as R13 453 on momondo.
What cabin class options are available on Washington, D.C. to London flights?
There are 1 cabin classes available to choose from on Washington, D.C. to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
How have Washington, D.C. to London flight prices changed over time?
As of May 2025, prices for Washington, D.C. to London flights are approximately 0% more expensive when compared to flights at the same time last year.
When to book flights from Washington, D.C. to London
Cheap Washington, D.C. to London (WAS to LON) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to London
How far is Washington, D.C. to London by plane?
A flight from Washington, D.C. to London will travel around 5893,9 km.
When did momondo last update prices for flights from Washington, D.C. to London?
Prices for flights from Washington, D.C. to London were last updated today.
How old do you have to be to fly from Washington, D.C. to London?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and stopovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to London.
What documentation or ID do you need to fly to London?
The travel and health documents you'll need for your trip to London may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's licence and a passport that is valid for six months after your intended arrival at London. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Washington, D.C. to London?
Based on momondo bookings for flights between Washington, D.C. and London, the leading plane model is Boeing 777, making up 37,87% of the total bookings. Other popular models include Airbus A380-800 with 17,63%, Boeing 787-8 Dreamliner with 7,89%, and Airbus A330-900neo with 7,05%.
Travelling 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 Washington, D.C. 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 Washington, D.C..
Can I find flights from Washington, D.C. to London with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to London from Washington, D.C. with this policy.
How can momondo help me find flights from Washington, D.C. to London?
Once all potential Washington, D.C. 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 Washington, D.C. to London right now. Can momondo alert me if prices change?
If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Washington, D.C. and alert you when they change.