$453 Cheap Delta flights from Seattle to London (SEA to LHR)

Find The Best Day To Fly from Seattle to London

Amazing Delta SEA to LHR Flight Deals

The cheapest flights to Heathrow found within the past 7 days were $664 round trip and $453 one way. Prices and availability subject to change. Additional terms may apply.

Tue, Oct 15 - Sat, Oct 26
SEA
Seattle
LHR
London
$664 Roundtrip, just found
$664
Roundtrip
just found
Select Delta flight, departing Tue, Oct 15 from Seattle to London, returning Sat, Oct 26, priced at $664 just found

LHR From SEA Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.
Hotel Riu Plaza London Victoria

Hotel Riu Plaza London Victoria

4 out of 5
per person
Jul 5 - Jul 10
Roundtrip non-stop flight included
Seattle (SEA) to London (LHR)
ME London

ME London

5 out of 5
per person
Jul 5 - Jul 10
Roundtrip non-stop flight included
Seattle (SEA) to London (LHR)
Duke of Leinster

Duke of Leinster

3 out of 5
per person
Jun 5 - Jun 12
Roundtrip non-stop flight included
Seattle (SEA) to London (LHR)
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Frequently asked questions

Can I catch a flight from SEA to London Heathrow right now?
Ensure you check out our Covid-19 Travel Advisor to see if there are any present travel advice reports or quarantine requirements in place in LHR when flying in from Sea-Tac Airport.
What terminal is Delta Air Lines at Sea-Tac Airport?
If you’re flying from Sea-Tac Airport to Heathrow Airport (LHR), you’ll most likely be arriving at terminal 3. We can’t say for certain which terminal you’ll be departing from — it’s wise to consult your airline.
Are there Delta Air Lines non-stop flights from SEA to LHR?
You’ll be pleased to hear you can go straight from SEA to LHR with Delta Air Lines and avoid lengthy layovers. The less time you spend traveling to your destination, the more time you’ll have for new experiences.
How long is a Delta Air Lines flight from SEA to LHR?
Your Delta Air Lines flight from SEA to LHR will take around 11 hours and 9 minutes, so it’s wise to pack some toiletries and a change of clothes for the journey. If you want to keep boredom at bay, throw some magazines or books in your carry-on bag as well.
What type of aircraft does Delta Air Lines fly from SEA to LHR?
Looking for a flight from SEA to LHR with Delta Air Lines? On this route, you’ll typically be climbing aboard the Boeing 787-9 or the Airbus A330-900neo type aircraft.
How many direct and indirect flights does Delta Air Lines fly from SEA to LHR?
You’ll enjoy lots of flexibility if you want to fly with Delta Air Lines between SEA and LHR. Currently, it has no fewer than 2 flights each 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 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 LHRMon
5/13		Tue
5/14		Wed
5/15		Thu
5/16		Fri
5/17		Sat
5/18		Sun
5/19		Stops
DL2009:10 pm02:50 pmCheck FareCheck FareCheck FareCheck FareCheck FareCheck FareCheck Fare
0 Stops

Discover our best Delta flight from Seattle SEA to London LHR 

To find the best deals on flights to Seattle from London with Delta, just enter your travel dates, filter by Delta, and hit search. You’ll find 2 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 Delta 

If you’re planning a round trip, booking return flights with Delta is usually the most cost-effective option. With airfares ranging from $664 to $664, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

 

Book one-way Delta 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 Delta flight from Seattle to London costs from $453. Prices and availability subject to change. Additional terms may apply. 

 

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

To find a cheap Delta 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 Delta 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 October, or if you book a flight with a stopover. 

 

Find nonstop flights from Seattle SEA to London LHR with Delta 

If you’re keen to be on London soil fast, don’t waste time with a stopover—filter your search results to show direct Delta flights only. The journey takes around 25 hour(s) 20 min(s) – so you’ll be there before you know it. 

 

Flexible airline tickets for Delta 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 Delta 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.

Delta Airports
Hop on a(n) Delta flight today by flying to many destinations out of these domestic and international airports:
Airport code
Country
Airport name
Number of flights
ATLUSAHartsfield-Jackson Atlanta Intl.252
DTWUSADetroit Metropolitan Wayne County156
MSPUSAMinneapolis - St. Paul Intl.131
SLCUSASalt Lake City Intl.116
SEAUSASeattle - Tacoma Intl.57
LAXUSALos Angeles Intl.41
AMSNLDSchiphol31
YYCCANCalgary Intl.26
YYZCANPearson Intl.24
JFKUSAJohn F. Kennedy Intl.23

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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.
*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.