The Houses of Parliament and Big Ben in London, with a red double-decker bus crossing the Lambeth Bridge.

Delta Flights from Seattle-Tacoma International Airport (SEA) to London (LON-All Airports)
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Find the cheapest Delta flights on Expedia from Seattle (SEA) to London (LON). Flight ticket prices change frequently based on availability and demand. We send price-drop alerts to make air travel simple and flexible. The lowest one-way fare found on Expedia with Delta for this route in the past 7 days starts at S$423 for travel on 2 August 2027.

S$423 Cheap Delta flights Seattle (SEA) to London (LON)

Prices were available within the past 7 days and start at S$423 for one-way flights and S$1,038 for return, for the period specified. Prices and availability are subject to change.

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One way

Return

Sun, 14 Mar - Mon, 22 Mar

SEA

Seattle

LHR

London

S$1,038

Return

Found 3 days ago

Select Delta flight, departing Sun, 14 Mar from Seattle to London, returning Mon, 22 Mar, priced at S$1,038 Found 3 days ago

Sun, 14 Mar - Mon, 22 Mar

SEA

Seattle

LHR

London

S$1,132

Return

Found 3 days ago

Select Delta flight, departing Sun, 14 Mar from Seattle to London, returning Mon, 22 Mar, priced at S$1,132 Found 3 days ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Average driving time to city centre is 34 minutes.

LHR

Heathrow

34 min

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Select flight to Gatwick LGW. Average driving time to city centre is 51 minutes.

LGW

Gatwick

51 min

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Select flight to Stansted STN. Average driving time to city centre is 51 minutes.

STN

Stansted

51 min

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Select flight to Birmingham Airport BHX. Average driving time to city centre is 2 hours 1 minute.

BHX

Birmingham Airport

2 h 1 min

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Select flight to Luton LTN. Average driving time to city centre is 45 minutes.

LTN

Luton

45 min

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Select flight to London City LCY. Closest option available. Average driving time to city centre is 21 minutes.

LCY

London City

Closest

21 min

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Select flight to Southampton SOU. Average driving time to city centre is 1 hour 29 minutes.

SOU

Southampton

1 h 29 min

Search flights

Find the cheapest month to fly from Seattle (SEA) to London (LON)

February is typically the cheapest month to fly

From S$814 - S$1,104 per traveller.

Travel information

Origin airport	Seattle-Tacoma International Airport
Destination airport	London
Distance	7,742 km away
Airline name	Delta
Airline code	DL
Return price	S$1,038

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Delta flights to London from Seattle

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S$423 Cheap Delta flights Seattle (SEA) to London (LON)

Alternative airports near London

Find the cheapest month to fly from Seattle (SEA) to London (LON)

February is typically the cheapest month to flyFebruary is typically the cheapest month to fly

Travel information

Explore a world of travel with Expedia

February is typically the cheapest month to fly