Cheap flights from Seattle to London Heathrow Airport from £193

If you book a flight to London Heathrow from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 19 flights from Seattle/Tacoma Intl to London Heathrow per day from 5 different airlines.

Yes, there are multiple flights from Seattle to London Heathrow Airport for under £500. The cheapest flight booked recently is on Icelandair for just £427, but on average you can expect to pay £458.

Cheapflights has at least 20 direct flights from Seattle to London Heathrow Airport under £500. A good price for a nonstop flight from Seattle to London Heathrow Airport is less than £535.

There are currently 20+ open flights from Seattle to London Heathrow Airport within the next 7 days for less than £800.

Cheapflights users have booked flights from Seattle to London Heathrow Airport round-trip from £427. Other airlines that can offer you cheap pricing are Lufthansa, from £445, and Air Canada, from £457. You may be able to fly from Seattle to London Heathrow Airport for 37% less than the average price by searching for these airlines.

Consider American Airlines (71%), Aer Lingus (71%) or Finnair (71%) when booking your flight. These represent the most reliable airlines when flying from Seattle to London Heathrow Airport.

While on average a flight from Seattle to London Heathrow Airport is generally £642, our data shows the cheapest flight currently is £365. When looking at the most popular route, (Seattle/Tacoma Intl - London Heathrow), you can expect to pay £434 for that flight.

These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Seattle/Tacoma Intl Airport to London Heathrow Airport flight would often be abbreviated as a SEA to LHR flight.

The amount of baggage you can bring on your Seattle to Heathrow flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

Yes, Cheapflights allows you to browse and filter Seattle to Heathrow flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Yes. In addition to deals on Seattle to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Heathrow.

Yes. Cheapflights offers flight deals from Seattle to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Many airlines flying from Seattle to Heathrow offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

Yes, you can often find last-minute deals on Seattle to Heathrow flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

The Seattle to London Heathrow Airport flight deals you see on this page were last updated on 1/6.

When booking a flight from Seattle to London Heathrow Airport, you may want to consider flying on Air France, Finnair or British Airways as they are the most popular for this route.

Currently, January is the cheapest month in which you can book a flight from Seattle to London Heathrow Airport (average of £110). Flying from Seattle to London Heathrow Airport in June is currently the most expensive (average of £162). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.