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British Airways is the single biggest operator between the United States and London, with nonstop service from 27 American cities into Heathrow. That's more direct routes than any other UK carrier. Fares from the East Coast start around $400 round-trip in economy during off-peak months, and the airline runs a mix of A380s, 777s, 787s, and A350s across these routes. If you're booking through Mundo Trip, we'll match you with the best available fare and cabin class for your dates.
John F. Kennedy International Airport (JFK)
British Airways operates up to 9 daily nonstop flights from JFK to London Heathrow. Flight time is around 7 hours eastbound. This is BA's flagship US route with multiple aircraft types including the A380 and A350-1000, offering all four cabin classes on most departures.
Los Angeles International Airport (LAX)
British Airways flies nonstop from LAX to London Heathrow with multiple daily departures. Eastbound flight time runs close to 10 hours. The route typically uses Boeing 777 or A350-1000 aircraft, and First Class is available on select departures.
O'Hare International Airport (ORD)
Chicago O'Hare has nonstop British Airways service to London Heathrow, with the A380 deployed on this route during peak periods. Flight time is roughly 8 hours heading east. All four cabin classes are generally available.
Miami International Airport (MIA)
British Airways operates twice-daily nonstop service from Miami to London Heathrow during summer 2026. Eastbound flights take around 9 hours. Boeing 777 aircraft are standard on this route, with Club Suite business class on newer frames.
San Francisco International Airport (SFO)
San Francisco gets daily nonstop British Airways service to London Heathrow. Eastbound flight time is about 10 hours. The route frequently uses the A350-1000 with Club Suite, World Traveller Plus, and World Traveller cabins (no First on the A350).
Boston Logan International Airport (BOS)
British Airways flies nonstop from Boston to London Heathrow daily, with the A380 sometimes deployed on this route. Flight time runs about 6.5 to 7 hours eastbound, making it one of the shorter transatlantic crossings. All cabin classes including First are available on A380 services.
Cheapest Months to Travel
January and February tend to have the lowest fares from the US to London. November (excluding Thanksgiving week) is another good window. Demand drops after the summer rush and before the holiday peak, so you'll find better pricing and more seat availability.
Peak Travel Seasons to Watch
June through August is the most expensive stretch, followed by the Christmas and New Year period. Spring break weeks in March and April also push fares up, especially from family-heavy departure cities.
Best Time to Book
For the cheapest fares, try booking 6 to 10 weeks before departure. If you're targeting peak summer or Christmas travel, booking 3 to 5 months out is a safer bet to lock in reasonable pricing.
Midweek Advantage
Tuesday and Wednesday departures from the US tend to be the cheapest days to fly. Friday and Sunday flights carry a premium because of weekend travel demand.
Time Difference to Plan For
London runs on Greenwich Mean Time (GMT), which is +5 hours ahead of Eastern Time and +8 ahead of Pacific Time. During British Summer Time (late March to late October), the gap shrinks by one hour. Most overnight flights from the US East Coast land in London early morning, so plan your first day accordingly.
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