Book Cheap British Airways flight from Seattle (SEA) to London (LHR) from CA $583

Find The Best Day to Book a Cheap British Airways Flights From Seattle to London

Cheapest British Airways Flights from Seattle (SEA) to London (LHR)

The cheapest flights to Heathrow found within the past 7 days were CA $1,116 round trip and CA $583 one way. Prices and availability subject to change. Additional terms may apply.

Sun., 29 Dec. - Sun., 12 Jan.
SEA
Seattle
LHR
London
CA $1,116 Roundtrip, found 23 hours ago
CA $1,116
Roundtrip
found 23 hours ago
Select British Airways flight, departing Sun., 29 Dec. from Seattle to London, returning Sun., 12 Jan., priced at CA $1,116 found 23 hours ago

Frequently asked questions

Can I catch a flight from SEA to Heathrow Airport (LHR) right now?
For info on any current Heathrow Airport travel advice and quarantine requirements, visit the Covid-19 Travel Advisor. Check before you arrange your flight, so you don’t get caught out.
What terminal is British Airways at Sea-Tac Airport?
If you’re traveling from SEA to London Heathrow, the chances are you’ll be exiting the plane at terminal 5. We can’t say for sure which terminal you’ll be heading off from — it’s a good idea to ask your airline.
Are there British Airways non-stop flights from SEA to LHR?
Direct flights are available with British Airways, which means you’ll be able to fly from Sea-Tac Airport to LHR quickly. Those thrilling travel experiences you’re craving are one simple flight away.
How long is a British Airways flight from SEA to LHR?
If you’re heading from SEA to LHR with British Airways, fasten your seat belt and make yourself comfortable. This long-haul flight lasts on average 11 hours and 5 minutes, so try to get some shut-eye if you want to avoid jet lag.
What type of aircraft does British Airways fly from SEA to LHR?
The Boeing 787-9 and the Boeing 777-200 are the two types of aircraft generally used by British Airways between Sea-Tac Airport and Heathrow Airport.
How many direct and indirect flights does British Airways fly from SEA to LHR?
If you want to book a trip from SEA to LHR, you can pick from 2 British Airways flights every day.
If I am not able to travel due to COVID-19, can I change my booking to a later date?
For more info about changing your flight to Heathrow Airport (LHR), please visit our Customer Service Portal.
What is the best day to buy a plane ticket?
This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.
What are the cheapest days to fly?
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
How far in advance can you book a flight?
Trying to figure out how early you should book your flight? It’s possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.
CarrierFlightDepart SEAArrive LHRFri.
01/11		Sat.
02/11		Sun.
03/11		Mon.
04/11		Tue.
05/11		Wed.
06/11		Thu.
07/11		Stops
BA5202:45 pm07:10 amCheck FareCheck Fare
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Check Fare
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0 Stops
BA4807:50 pm00:15 pm
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Check FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Grab a great British Airways flight from SEA to LHR 

To find a great deal on British Airways flights with Travelocity, simply enter your origin and destination airports, pick your travel dates, and hit search. From here, you can sort by price, flight duration, and arrival/departure time. You can also filter to find nonstop flights. 

Flying British Airways Seattle to London gives you 1 fights to choose from. With that direct flight time of 25, you’ll be touching down before you know it.  

 

Find cheap flights with British Airways between Seattle and London 

British Airways has a range of great fares on stacks of flights, and to find the most affordable for you, there are a few tricks you can try. Booking in advance, for example, is a great way to grab a fantastic deal. Also, choose the cheapest month, if you can. One-way flights from Seattle to London with British Airways are March.  

The more flexible you are, the more affordable flights you’re likely to find. Consider one-way flights and connecting flights, as well as standard roundtrip and direct options. Even if you’re flying today, cheap last-minute flights are easy to find by entering your travel dates and hitting search.  

 

Reasons to book your British Airways flights with Travelocity 

Travelocity makes it easy to book a seat, anywhere in the world. The vast inventory, fast search, and advanced filters put some of the best deals on the planet in one place. Whether you’re traveling on business, with friends, family, or on your own, take your pick from some fantastic options. And with free cancellation and pay later options, you can travel more and worry less.  

British Airways Airports
Hop on a(n) British Airways flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
DFWUSADallas-Fort Worth Intl.107
ORDUSAO'Hare Intl.98
MIAUSAMiami Intl.42
LHRGBRHeathrow31
PHLUSAPhiladelphia Intl.26
CLTUSACharlotte-Douglas Intl.23
DUBIRLDublin14
MSYUSALouis Armstrong New Orleans Intl.13
HNDJPNHaneda11
BNAUSANashville Intl.10

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