Washington D.C. to London flight

Flights from Washington D.C. to London start at £374.18.

Fares

Check dates and fares

Fares and seats move by the day. Price Washington D.C. to London on the date you actually want, rather than on the date this page was built.

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The City of London skyline as viewed toward the north-west from the top floor viewing platform of London City Hall on the southern side of the Thames. In the foreground: Dixie Queen and Millennium Time at Tower Millennium Pier. This is a 5 segment panoramic image taken by myself with a Canon 5D and 24-105mm f/4L IS lens.

The Flights from Washington D.C. to London starts at £374.18, run by 4 operators over 6,076 km. Fares bottom out about 90 days before departure.

Checked 6 October 2026Priced for 26 October 2026One passenger, all fees included

  • 11h 13mDoor to door
  • 8h 3mMoving
  • £443.93 to £928.17From
  • 1780.3 kgCO2

£443.93 to £928.17 for one passenger across the 14 departure dates priced here. The low end is one day, not every day. Typical for this corridor. The operator sets the price on the day.

Where to buy this flight

Kiwi.com sells the ticket itself, so you pay there rather than being handed on again.

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Fares by date

What this journey usually costs, by departure date. It shows which days run dearer.

Typical fares

  1. about £851.34Wed7
  2. about £928.17Thu8
  3. about £862.96Fri9
  4. about £719.91Sat10
  5. about £647.13Sun11
  6. about £559.18Mon12
  7. about £558.67Tue13
  8. about £477.79Wed14
  9. about £602.64Thu15
  10. about £551.59Fri16
  11. about £573.33Sat17
  12. about £521.76Sun18
  13. about £452.01Mon19
  14. about £443.93Tue20

Based on what this route has cost recently. The live fare is confirmed when you book.

Carriers

Airlines

Every operator we sell on this corridor. Speed is the carrier's own typical cruising speed, not the average over this route.
OperatorFrom
Finnair£374.18
British Airways£382.25
United Airlines£379.73
Virgin Atlantic Airways£376.19

The flight gets you into London. These two partners take it from there, and the bed is theirs to book.

A hotel room

A room in London for the night the flight gets in

Sort by distance from London St Pancras International and you can see which places are ten minutes on foot and which are not.

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Booking window

When to book Washington D.C. to London

The same search run across the whole booking window, so the shape of the curve is visible rather than described.

  1. £304.4290 days
  2. £454.0460 days
  3. £373.6745 days
  4. £408.0430 days
  5. £377.2121 days
  6. £443.9314 days
  7. £558.677 days
  8. £862.963 days
  9. £851.341 days
Cheapest lead time
Fares bottom out around 90 days ahead, at £304.42.
How much it moves
The gap between the cheapest and dearest lead time is 183 percent. The dearest point is £862.96, 3 days out.
What that means
Today sits inside the cheap window, which closes about 90 days before departure. Waiting from here has usually cost money on this corridor rather than saved it.
Day of the week

Which departure day costs least

Median cheapest fare for each weekday, taken across the next three weeks of real prices.

  1. £521.76Sun
  2. £452.01Mon
  3. £443.93Tue
  4. £477.79Wed
  5. £602.64Thu
  6. £551.59Fri
  7. £573.33Sat
Terminals

Where you leave from and where you arrive

Washington

Air
  • IAD
  • DCA

London

Air
  • LHR
  • LGW
  • STN
  • LTN
  • LCY
  • SEN
The journey

What the journey looks like

How far it really runs
The route covers 6,076 km against 5,899 km in a straight line, a detour of 3 percent. Track and road geometry account for the difference.

Questions about Washington D.C. to London

The questions people actually ask about this journey, answered from the same prices and times the page above is built on rather than written once and left to go stale.

How long does the Flight from Washington D.C. to London take?

The Flight from Washington D.C. to London covers 6,076 km. Each operator's own departure and arrival times for the date you pick are in the search at the top of this page, beside the total price.

How much does the Flight from Washington D.C. to London cost?

The Flight from Washington D.C. to London starts at £374.18 for one passenger, as of 6 October 2026. A typical fare is £450.75. Both are the total including taxes, supplier fees and our service fee, so the price here is the price at checkout.

Who runs the Flight from Washington D.C. to London?

4 operators run the Flight from Washington D.C. to London: Finnair, British Airways, United Airlines, Virgin Atlantic Airways. The operator table on this page sets out fare, journey time, cruising speed, fare conditions and what is provided on board.

Which terminal does the Flight from Washington D.C. to London use?

The Flight from Washington D.C. to London leaves from Washington Dulles International Airport IAD and arrives at London Heathrow Airport LHR. Allow about 3h 10m for reaching the departure terminal and leaving the arrival one. That time is already inside every door to door figure quoted on this page.

When should I book the Flight from Washington D.C. to London?

Fares for the Flight from Washington D.C. to London bottom out around 90 days ahead, at £304.42. The gap between the cheapest and dearest lead time across the window is 183 percent, measured on 6 October 2026. Booking inside the final week has consistently cost more.

How much CO2 does the Flight from Washington D.C. to London produce?

The Flight from Washington D.C. to London produces about 1780.3 kg of CO2 per passenger over 6076 km, which works out at roughly 293 grams per passenger kilometre. That figure is for the whole journey and for one traveller, not for the vehicle.

Where these numbers come from

Places, coordinates, operators, which operator serves which pair, and every distance on this page are real and come from open data. Where a corridor has a filed timetable the departure times are real too, and ferry fares are the prices the operators publish themselves.

Observed service A carrier record names this operator on this pair, carried through unchanged.

Prices come from the supplier wherever we hold a live quote. Elsewhere we show an indicative price built from the real distance, the real operator and a fare curve over lead time, day of the week and season. Those are labelled Estimated fare and cannot be booked.

Defined in full at Door to door, Fares, The booking window, Carbon

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London is large, and the road in from LHR can take longer than the last hour of the flight. Cars are not our business.

A taxi rank outside an airport terminal

A car waiting when you land in London

Settled in advance, so the ride into London costs what it said it would rather than what the rank says.

Book a transfer from LHR with Welcome PickupsOr check Daytrip

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