$525 Cheap Delta flights Seattle (SEA) to London (LHR)

View $525 flight on Mon, Sep 14, 2026Opens in a new window

$525 Cheap Delta flights Seattle (SEA) to London (LHR)

Prices were available within the past 7 days and start at $525 for one-way flights and $1,018 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Oct 1 - Mon, Oct 19
SEA
Seattle
LHR
London
$1,018 Roundtrip, found 5 hours ago
$1,018
Roundtrip
found 5 hours ago
Select Delta flight, departing Thu, Oct 1 from Seattle to London, returning Mon, Oct 19, priced at $1,018 found 5 hours ago
Delta
Thu, Oct 1 - Mon, Oct 19
SEA
Seattle
LHR
London
$1,027 Roundtrip, found 5 hours ago
$1,027
Roundtrip
found 5 hours ago
Select Delta flight, departing Thu, Oct 1 from Seattle to London, returning Mon, Oct 19, priced at $1,027 found 5 hours ago

Alternative airports near London

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

Select flight to Gatwick LGW. Average driving time to city center is 52 minutes. Flights from $1,200
LGW
Gatwick
Average driving time to city center52 min
Flights from $1,200

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

October is typically the cheapest month to fly

From $477 - $843 per traveler.

Travel information

Origin airport
Seattle - Tacoma Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Turkish Airlines, United, Virgin Atlantic, WestJet
Popular airline
Delta
Distance
7657 km
Average flight time
17 hours 35 mins

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