$540 Cheap Aer Lingus flights from Seattle to London (SEA to LHR)

Find The Best Day To Fly from Seattle to London

Amazing Aer Lingus SEA to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $797 round trip and $540 one way. Prices and availability subject to change. Additional terms may apply.

Wed, Nov 12 - Wed, Nov 19
SEA
Seattle
LHR
London
$797 Roundtrip, just found
$797
Roundtrip
just found
Select Aer Lingus flight, departing Wed, Nov 12 from Seattle to London, returning Wed, Nov 19, priced at $797 just found

LHR From SEA Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Tribe London Canary Wharf

Tribe London Canary Wharf

4 out of 5
Price was $1,298, price is now $1,017 per person
$1,017
per person
Jan 13 - Jan 20
found 16 hours ago
Roundtrip non-stop flight included
Seattle (SEA) to London (LHR)
Hotel Riu Plaza London Victoria

Hotel Riu Plaza London Victoria

4 out of 5
Price was $1,811, price is now $1,274 per person
$1,274
per person
Dec 4 - Dec 7
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to London (LHR)
Collingham Road - 2 Bedroom Apartment I

Collingham Road - 2 Bedroom Apartment I

2 out of 5
Price was $4,692, price is now $3,581 per person
$3,581
per person
Dec 27 - Jan 2
found 1 day ago
Roundtrip non-stop flight included
Seattle (SEA) to London (LHR)
Don't see what you're looking for?
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Frequently asked questions

Can I catch a flight from Sea-Tac Airport to London Heathrow right now?
It's wise to know about any quarantine requirements and travel advice reports in place in your destination. Make sure you check out the Covid-19 Travel Advisor for up-to-date info on flying to London Heathrow from Sea-Tac Airport.
What terminal is Aer Lingus at Sea-Tac Airport?
If you're traveling from Seattle - Tacoma Intl. Airport (SEA) to Heathrow Airport, you'll probably be arriving at terminal 5. We can't say for certain which terminal you'll be heading off from — it's a good idea to consult your airline.
Are there Aer Lingus non-stop flights from SEA to LHR?
As you can't go nonstop from Seattle - Tacoma Intl. Airport (SEA) to LHR with Aer Lingus, make the most of your stopover. Order a couple of drinks at a comfortable airport bar, or explore the terminal and enjoy some retail therapy.
How long is an Aer Lingus flight from SEA to LHR?
Life is one big, exciting journey — and so is your flight from SEA to Heathrow Airport with Aer Lingus. Taking around 10 hours and 40 minutes, be sure to bring the basics like a pillow, a warm sweater and your water bottle.
What type of aircraft does Aer Lingus fly from SEA to LHR?
The Boeing 787-9 is generally used by Aer Lingus on the SEA to LHR route. Check out the in-flight magazine in your seat pocket if you want to learn a bit about it.
How many direct and indirect flights does Aer Lingus fly from SEA to LHR?
You'll have enough options if you decide to fly from SEA to Heathrow Airport (LHR) with Aer Lingus. The airline offers about 17 services on this route each month.
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.

Discover our best Aer Lingus flight from Seattle SEA to London LHR 

To find the best deals on flights to Seattle from London with Aer Lingus, just enter your travel dates, filter by Aer Lingus, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.  

 

Return flights from Seattle SEA to London LHR with Aer Lingus 

If you’re planning a round trip, booking return flights with Aer Lingus is usually the most cost-effective option. With airfares ranging from $797 to $797, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way Aer Lingus flights from Seattle SEA to London LHR 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way Aer Lingus flight from Seattle to London costs from $540. Prices and availability subject to change. Additional terms may apply. 

 

The easy way to find cheap flights to London LHR from  Seattle SEA with Aer Lingus 

To find a cheap Aer Lingus flight from Seattle SEA to London LHR, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

 

How to find our best airfare deals on Aer Lingus flights from Seattle SEA to London LHR 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as November, or if you book a flight with a stopover. 

 

Find nonstop flights from Seattle SEA to London LHR with Aer Lingus 

If you’re keen to be on London soil fast, don’t waste time with a stopover—filter your search results to show direct Aer Lingus flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for Aer Lingus flights from Seattle SEA to London LHR 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

 

There are a lot of reasons to book your flights to London LHR from  Seattle SEA with Aer Lingus on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

Aer Lingus Airports
Hop on a(n) Aer Lingus flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ORDUSAO'Hare Intl.43
DUBIRLDublin16
LHRGBRHeathrow7
BOSUSALogan Intl.7
JFKUSAJohn F. Kennedy Intl.5
MSNUSADane County Regional4
IAHUSAGeorge Bush Intercontinental4
LAXUSALos Angeles Intl.3
STLUSALambert-St. Louis Intl.3
GRRUSAGerald R. Ford Intl.3

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Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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*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.