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Cheap flights from London to Washington

Recently found return fares from $387, with November the cheapest month we know of. Compare dates, then book with the partner you choose.

Cheapest months to fly

Lowest recently found return fare in each month. Tap a month to see that month's calendar.

$514 Oct2026 $387 Nov2026 $395 Dec2026

London → Washington

November 2026

Mon Tue Wed Thu Fri Sat Sun 1 2 $498 3 $464 4 5 $514 6 7 8 9 10 11 12 $494 13 14 $475 15 16 $462 17 $487 18 19 20 $387 21 $490 22 23 $473 24 25 26 $452 27 28 29 30
LowerHigherLowest this month

Lowest fares for the best day

  • Aer LingusSun 8 Nov – Sun 15 Nov · 1 stop · 9h 55m $428
  • IcelandairFri 20 Nov – Mon 23 Nov · 1 stop · 10h $562
  • IcelandairSun 8 Nov – Sat 14 Nov · 1 stop · 9h 55m $571
  • IcelandairSun 1 Nov – Sun 8 Nov · 1 stop · 9h 55m $582
  • SWISSThu 19 Nov – Mon 23 Nov · 1 stop · 11h 30m $649
See all flights for these dates

Airports in Washington

  • IADDulles
  • DCAReagan National

Airports in London

  • LHRHeathrow
  • LGWGatwick
  • STNStansted
  • LTNLuton
  • LCYCity

Watch this route

LON
WAS

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More trips from London

All flights from London Washington to London flights
Barcelonafrom $39 Milanfrom $41 BFSfrom $42 Edinburghfrom $44 Bilbaofrom $58 Stockholmfrom $66 Parisfrom $72 Romefrom $78

FAQ

Questions about this route

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Help center Contact us
01What is the cheapest month to fly from London to Washington?

Based on recently found fares, November 2026 has the lowest price we know of, from $387. Prices change often, so check the calendar for current fares.

02Which airports serve Washington?

Washington is served by Dulles (IAD), Reagan National (DCA). Searching the city code compares all of them at once.

03Are the prices on this page final?

No. They are recently found fares. When you open a deal, the partner shows the live price, including taxes and fees, before you pay.

04How can I get an alert when flights to Washington get cheaper?

Use the price alert on this page. Choose your dates or a whole month and we will email you when the fare drops.