Beginning of main content
Trip Type
Flight 1
Flight 2
Flight 3
Flight 4
Flight 5
Due to coronavirus (COVID-19) travel advisories, some destinations may be unavailable for certain dates. Find out more.

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights


Amazing Air Canada SEA to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $825 round trip and $2,382 one way. Prices and availability subject to change. Additional terms may apply.


FAQs about Air Canada Flights from SEA to LHR

What terminal is Air Canada at Sea-Tac Airport?

Once you've received the boarding pass for your flight from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to London Airport (LHR-Heathrow), you should be able to identify which terminals Air Canada flies into and out of. If not, contact your carrier or do some online research for that information.

Are there Air Canada non-stop flights from SEA to LHR?

Prepare to make at least one stopover when traveling from Seattle, WA Airport (SEA-Seattle - Tacoma Intl.) to London Airport (LHR-Heathrow), as Air Canada doesn't offer any direct flights between these two locations. While in transit, you might like to pick up a new bestseller or a glossy magazine from the airport bookstore to make the time go faster.

How long is an Air Canada flight from SEA to LHR?

If you're into watching back-to-back films, you probably won't mind the fact that your Air Canada flight from SEA to LHR will take approximately 11 hours and 52 minutes. Make sure you download your films before you step on the plane, or simply make good use of the in-flight entertainment.

How many direct and indirect flights does Air Canada fly from SEA to LHR?

The path is well traveled from Seattle, WA (SEA-Seattle - Tacoma Intl.) to London (LHR-Heathrow). Air Canada travels between the two approximately 9 times every week.

Flying Tips & Tricks How do I find my flight number?
  • You can find your flight number in your travel itinerary. It's not hard to spot if you know what you're searching for. Browse the document for a code consisting of numbers and letters. The first couple of letters and digit indicate your airline name (these are called IATA airline codes). This is followed by one to four digits — your flight number.
How early can you check bags for a flight?
  • This can vary between airlines, but typically it's two hours for domestic flights and three hours for international. Drop off your luggage early and sit back and relax in the airport terminal. It sure beats being caught up in traffic wondering if you'll make your flight.

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.