How much should you expect to spend for a flight from Seattle Lake Union to London Heathrow?

Flight prices from Seattle to London change depending on demand and time of booking.

Pick a travel date to see today’s available fares.

Studies show that flying midweek — like on a Tuesday or Wednesday — can be cheaper than weekend flights. Still, airfares change frequently, so check updated prices on Jetcost.

Are there multiple airports in Seattle and London?

If your departure or arrival city has more than one airport, it's worth comparing all of them for timing and pricing.

• Airports in Seattle: 2 airports are active in Seattle - Boeing Field, Lake Union.
• Airports in London: 6 airports are available in London - City Airport, Gatwick, Heathrow, Luton, Southend, Stansted.

If you're traveling with a group or bulky luggage, look into parking or transport options. Alternative airports may offer faster transfers or better rates.

Choose the right flight for your trip from Seattle Lake Union to London Heathrow

Jetcost helps you tailor your flight search based on what matters to you — flight length, budget, airline, or agency. Whether you prefer round-trip or one-way, direct or with stopovers, you’ll see options from the best airlines and travel agencies.

Other popular destinations

Flying to United Kingdom? Many users also explore: Edinburgh, Glasgow, London, Manchester, Newquay.

Looking for a specific airline? Select it directly in the filters to speed up your search. The search filters help you see only the options that match your needs.