International route
Flights from Washington (IAD) to London (LHR)
From $469 rt
Planning a trip from Washington to London? Flitura searches published and consolidator fares from IAD to LHR in one place. Recent searches found fares from $469 rt. Typical international flight time is 6h 30m – 8h nonstop. Use flexible dates to spot lower fares on nearby days.
Sample fares found recently — search above for live prices on your dates.
Search live IAD → LHR faresTypical flight time
6h 30m – 8h nonstop
Best time to book
6–10 weeks before departure
Often cheapest days
Tuesday, Wednesday, and Saturday
Best months to fly
Shoulder seasons (March–May, September–November) usually offer the best Europe fare/value mix.
Flying from Washington (IAD) to London (LHR)
London Heathrow (LHR) is the primary US–UK gateway, with Elizabeth line and Tube links to central London. Allow time for immigration and terminal transfers on separate tickets.
May–September and Christmas–New Year are peak seasons for Europe.
Alternative airports
London has Heathrow (LHR), Gatwick (LGW), and Stansted (STN). Heathrow is fastest to central London; Gatwick can be cheaper on budget carriers.
Entry requirements
Passport, visa, transit, and entry requirements for travel from United States to United Kingdom depend on citizenship and can change. Verify current requirements with official government sources and the operating airline before booking.
Airlines on IAD–LHR
- British Airways
- Virgin Atlantic
- American Airlines
- United Airlines
- Delta Air Lines
Tips for cheaper Washington to London flights
- •Book 6–10 weeks ahead for the best balance of price and seat choice on IAD–LHR.
- •Shoulder seasons (March–May, September–November) usually offer the best Europe fare/value mix.
- •Tuesday and Wednesday departures are often cheaper than Friday or Sunday peaks.
- •London has Heathrow (LHR), Gatwick (LGW), and Stansted (STN). Heathrow is fastest to central London; Gatwick can be cheaper on budget carriers.
- •Set fare alerts and save your search — incomplete bookings can be resumed on Flitura.
- •Passport, visa, transit, and entry requirements for travel from United States to United Kingdom depend on citizenship and can change. Verify current requirements with official government sources and the operating airline before booking.
Frequently asked questions
How long is the flight from Washington to London?
Most itineraries from IAD to LHR take 6h 30m – 8h nonstop. Exact duration depends on nonstop vs connecting flights and wind conditions.
When is the cheapest time to fly from IAD to LHR?
Midweek travel and booking a few weeks in advance usually beat last-minute prices. May–September and Christmas–New Year are peak seasons for Europe. Shoulder seasons (spring and fall) often offer savings.
Which airlines fly from Washington to London?
Potential options for this market may include British Airways, Virgin Atlantic, American Airlines, United Airlines, but schedules change and not every airline operates every date. Search live results above to confirm the operating carrier and any codeshare.
Are taxes and fees included in the displayed fare?
Mandatory taxes are included where shown at checkout. Optional extras such as seats, bags, and travel protection are itemized before you pay.
Can I book one-way flights from IAD to LHR?
Yes — switch to One-way in the search box above or check round-trip bundles to see which saves more for your dates.
What is the cheapest fare from IAD to LHR?
Recent searches on Flitura found round-trip fares from $469 on this route. Live prices change daily — search above with flexible dates for the latest deals.
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