NZ$749 Cheap Flights London to Seattle (LON-SEA)

Within the past 7 days on Expedia, for flights departing within the next year, the lowest price advertised for a round-trip journey from London (LON-All Airports) to Sea-Tac Airport was . Cheap tickets don't wait forever, so book yours today. Prices and availability are subject to change. Additional terms apply.

This can vary between airlines, as each has its own terms and conditions. Visit the Customer Service Portal, where you'll find easy-to-follow instructions on how to cancel your flight online.

Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you're searching for London (LON-All Airports) to SEA flights, you'll see a "no change fees" filter for you to select.

The distance is around 7 700 kilometres, so fill your carry-on bag with all you need to make your journey comfortable. Not sure what to take on board your England to SeaTac flight? A travel pillow, earplugs and a sleep mask are a few essentials.

Whether you're after a one-way or return flight, you'll have your choice of airlines that will take you straight from London (LON-All Airports) to Sea-Tac Airport. These are some of the most popular ones:

• Virgin Atlantic - (VS) with 30 monthly flights
• American Airlines - (AA) with 30 monthly flights
• British Airways - (BA) with 30 monthly flights
• Delta Air Lines - (DL) with 17 monthly flights

Flight prices go up and down like a yo-yo, so not always. While last-minute deals between London (LON-All Airports) and Sea-Tac Airport are of course possible, it's also a good idea to keep a close eye on prices well before you fly. In fact, some carriers publish their prices up to a year before the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to book when the price is right.