Washington DC to London is the capital-to-capital transatlantic corridor, with three airlines operating 6 daily nonstop flights from Dulles International to Heathrow. British Airways leads with 3 daily departures, United adds 2 daily from its Dulles hub, and Virgin Atlantic contributes 1 daily service. All three carriers offer lie-flat business class, making this a strong route for government, diplomatic, and business travelers as well as tourists. Camli's consolidator network consistently surfaces fares below published prices, especially on premium cabins where savings of 40–60% are common.
| Route | Washington DC (IAD) → London (LHR) |
| Distance | ~3,687 miles / 5,932 km |
| Flight Time (Outbound) | ~7h 30min–7h 50min eastbound |
| Flight Time (Return) | ~8h 30min–9h 00min westbound |
| Nonstop Carriers | British Airways, United Airlines, Virgin Atlantic |
| Connecting Carriers | Aer Lingus (via DUB), Icelandair (via KEF), Air France (via CDG), Lufthansa (via FRA/MUC) |
| Peak Season | June–August (summer), December (Christmas/New Year), Cherry Blossom season (late March–mid April) |
| Shoulder Season | April–May, September–October |
| Premium Cabins | BA Club World (lie-flat), United Polaris (lie-flat), VS Upper Class (lie-flat) |
Indicative starting prices — search for live availability
| Cabin | Airline | From | Stops |
|---|---|---|---|
| Economy | Multiple carriers | $544 | Nonstop |
| Economy | British Airways | $570 | Nonstop (IAD) |
| Economy | United Airlines | $560 | Nonstop (IAD) |
| Economy | Virgin Atlantic | $590 | Nonstop (IAD) |
| Economy | Aer Lingus | $480 | 1 stop (DUB) |
| Economy | Icelandair | $460 | 1 stop (KEF) |
| Business | British Airways | $3,000 | Nonstop (IAD) |
| Business | United Airlines | $2,800 | Nonstop (IAD) |
| Business | Virgin Atlantic | $3,200 | Nonstop (IAD) |
Prices shown are indicative round-trip starting fares as of April 2026, inclusive of taxes and fees. Economy fares are lowest published; actual availability varies by date. Business class fares are published walk-up rates — Camli consolidator fares are typically 40–60% lower. Connecting carriers (Aer Lingus, Icelandair) often undercut nonstop fares by $60–100. Note: Reagan National (DCA) does not have transatlantic service. Search for live pricing.
Schedules verified April 2026. Three carriers operate nonstop IAD–LHR: BA (3 daily), United (2 daily), Virgin Atlantic (1 daily) — 6 total daily nonstops. All three offer lie-flat business class. Note: Reagan National (DCA) does not have transatlantic flights. Aer Lingus via Dublin and Icelandair via Reykjavik provide lower-cost connecting alternatives.
February and March offer the lowest fares at approximately $544–565 round-trip. January is also affordable at ~$655. Summer (June–August) is peak season with fares reaching $800–1,100+. Shoulder months (April–May, September–October) offer moderate fares of $650–800. Note: late March through mid-April sees a small spike due to DC's Cherry Blossom season attracting international visitors.
Tuesdays and Wednesdays are consistently the cheapest departure days, with savings of 10–15% compared to Friday or Sunday departures. Mid-week returns also tend to be cheaper. Red-eye departures (evening IAD, morning LHR arrival) are standard on this route.
6–10 weeks ahead for economy. 8–14 weeks for summer peak travel. Business class consolidator deals through Camli often appear 4–8 weeks before departure. Christmas/New Year: book 12+ weeks ahead. Cherry Blossom season: 8–10 weeks ahead.
Reagan National (DCA) does not have transatlantic service due to runway length restrictions. All nonstop London flights depart from Dulles (IAD), which is 26 miles from downtown DC. The Silver Line Metro now connects Dulles directly to downtown DC, though the journey takes about 60 minutes.
Dulles is a major United Airlines hub, meaning excellent domestic connections if you're flying in from elsewhere in the US. United's Polaris Lounge at IAD is one of the best in their network — complimentary for Polaris business class passengers with full-service dining and shower suites.
British Airways operates 3 daily nonstops from IAD to LHR — more than any other carrier. This gives you morning, afternoon, and evening departure options. The A380 is deployed on select peak-season flights, offering the quietest upper-deck business class experience.
Aer Lingus via Dublin offers US preclearance on return flights — you clear US customs and immigration in Dublin before boarding, arriving at IAD as a domestic passenger. Fares are often $60–100 cheaper than nonstop and the Dublin connection adds only 3–4 hours.
The Washington Metro Silver Line extension now reaches Dulles Airport directly. While the journey from downtown DC takes ~60 minutes, it costs just $6 and avoids Beltway traffic. For faster transit, the Dulles Access Road is toll-free for airport-bound traffic.
Tower of London, Buckingham Palace, Westminster Abbey, and the Houses of Parliament. London's history spans nearly 2,000 years, with iconic landmarks within walking distance of each other.
The British Museum, Tate Modern, National Gallery, Natural History Museum, and V&A are all free to enter. London offers more free museums than any other city in the world.
London's West End rivals Broadway with world-class productions. From long-running musicals to cutting-edge new shows, there's something for every taste and budget.
Stonehenge and Bath (90 min by train), Oxford and Cambridge (1 hour), Windsor Castle (30 min), and the Cotswolds are all easily accessible for day trips.
US citizens need a valid passport and a UK Electronic Travel Authorisation (ETA) for visits up to 6 months. The ETA launched January 8, 2025 and costs £10. Apply online before travel — approval is typically within 3 working days. No visa required for tourism or business meetings.
Entry requirements verified April 2026 for US passport holders. Requirements may change — always verify with the destination country's embassy before travel.
Search Camli's consolidator network for fares up to 60% below published prices. Or call our 24/7 expert line for unpublished deals.