London to Seattle Flight Time

The London to Seattle flight time is usually around 10 to 11 hours on a direct route. Travellers flying with British Airways, Virgin Atlantic, or Delta Air Lines can enjoy nonstop services from London Heathrow (LHR) or Gatwick (LGW) to Seattle–Tacoma International Airport (SEA). For one-stop routes via cities like Reykjavik, Toronto, or Chicago, the total London to Seattle flight duration may range between 12 to 15 hours, depending on layover times.

The London to Seattle flight distance is approximately 4,800 miles (7,725 kilometres). This long-haul route connects the UK with the Pacific Northwest, offering stunning views and comfortable journeys across the Atlantic.

Major airlines operating on this route include British Airways, Virgin Atlantic, Delta Air Lines, American Airlines, and Lufthansa. These carriers offer both direct and connecting flights from London’s major airports to Seattle, ensuring flexibility and comfort for every traveller.

Seattle operates on Pacific Time (PT) and is 8 hours behind London (GMT). When it’s 4:00 PM in London, it’s 8:00 AM in Seattle, which is useful to know when planning meetings or adjusting your travel schedule.

Flights usually depart from London Heathrow (LHR) or London Gatwick (LGW) and arrive at Seattle–Tacoma International Airport (SEA), which serves as the main gateway to the city and surrounding areas like Bellevue and Tacoma.

The most affordable months to fly are typically February, March, and November, when demand is lower. Travellers can find great flight deals by booking early or choosing midweek departures.

Yes, absolutely! With Crystal Travel UK, you can choose flexible payment plans like Book Now, Pay Later or Fly Now Pay Later. Secure your ticket with a low deposit and pay the remaining balance in easy instalments before your departure — perfect for stress-free budgeting.

There are around 70 or more weekly flights connecting London and Seattle, offering daily schedules and multiple departure options. This makes it convenient to plan your trip according to your preferred time and airline.

Yes, UK travellers need to apply for an ESTA (Electronic System for Travel Authorization) before entering the United States. It’s a quick online process and is valid for short stays under the Visa Waiver Program.

To find the best fares, compare offers on Crystal Travel UK, book early, and stay flexible with your travel dates. Keep an eye out for seasonal sales and early-bird discounts to enjoy affordable and hassle-free travel to the USA.

The best time to visit Seattle is between June and September, when the weather is mild, skies are clear, and outdoor activities are at their peak. This is perfect for sightseeing, exploring the Space Needle, or enjoying the city’s coffee culture and coastal views.