$176+ Cheap flights from Washington, D.C. (WAS) to London (LON)

Flying on United Airlines is currently your cheapest option to London, with prices starting at $559. Additional round-trip tickets that might be worth considering are offered by Icelandair and KLM, with the lowest prices starting at $560 and $560, respectively. United Airlines is 24% cheaper than the average price of flights available within the next 90 days to this destination.

$214 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on PLAY and TAP AIR PORTUGAL, with prices starting from $224 and $267, respectively.

When deciding which route to take from Washington, D.C. to London consider Washington, D.C. Dulles Intl - London Heathrow, Baltimore/Washington - London Heathrow or Washington, D.C. Dulles Intl - London Gatwick as they are the most popular.

The top 3 most reliable airlines when flying from Washington, D.C. to London are KLM (68%), Air France (68%) and Delta (68%).

While on average a flight from Washington, D.C. to London is generally $2,412, our data shows the cheapest flight currently is $371. When looking at the most popular route, (Washington, D.C. Dulles Intl - London Heathrow), you can expect to pay $420 for that flight.

Of the flights from Washington, D.C. to London that have layovers, most of them stop in Reykjavik. Boston follows Reykjavik in terms of the most common layover location on Washington, D.C. to London flights.

The majority of Reykjavik visitors spend their time at Hallgrímskirkja, Harpa, and Laugardalslaug Geothermal Pool. Those on a layover in Reykjavik interested in visiting Hallgrímskirkja, Harpa, or Laugardalslaug Geothermal Pool can do so by traveling 23.2 mi, 23.3 mi, and 24.6 mi, respectively from Reykjavik Keflavik Intl. Travelers can book a car rental at Reykjavik Keflavik Intl for about $76 per day to make their sightseeing more efficient.

Fenway Park, Boston Common, and Copley Square are the most popular attractions in Boston if you're in need of something to do during your layover. Travelers on a layover in Boston can visit Fenway Park, Boston Common, and Copley Square, by traveling 4.7 mi, 3.0 mi, and 3.6 mi, respectively after landing at Boston Logan Intl. Travelers can book a car rental at Boston Logan Intl for about $74 per day to make their sightseeing more efficient.

Flights departing from Washington, D.C. and landing in London layover in New York least frequently. Dublin sees the next fewest layovers on Washington, D.C. to London flights.

Yes. In addition to deals on Washington, D.C. to London flights, Cheapflights offers vacation packages that include both flights and hotel.

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to London.

Yes. Cheapflights offers flight deals from Washington, D.C. to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. to London (average of $661). Flying from Washington, D.C. to London in June is currently the most expensive (average of $1,098). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.