Cheapest return flights from Seattle to London in August from $614
AirHint found the following cheapest return flights from Seattle (SEA) to London (LHR)
in August 2026 (see full year ).
Return flights
18 Aug
- 02 Sep
Aer Lingus
$ 614
16 Aug
- 01 Sep
Aer Lingus
$ 614
24 Aug
- 01 Sep
Aer Lingus
$ 614
16 Aug
- 22 Aug
Scandinavian Airlines
$ 621
09 Aug
- 26 Aug
Aer Lingus
$ 626
17 Aug
- 25 Aug
Aer Lingus
$ 626
09 Aug
- 04 Sep
Delta
$ 633
18 Aug
- 29 Aug
Scandinavian Airlines
$ 651
02 Aug
- 15 Aug
Scandinavian Airlines
$ 670
03 Aug
- 19 Aug
British Airways
$ 674
16 Aug
- 26 Aug
British Airways
$ 674
09 Aug
- 22 Aug
Scandinavian Airlines
$ 675
15 Aug
- 26 Aug
Air Canada
$ 678
08 Aug
- 04 Sep
Delta
$ 683
07 Aug
- 04 Sep
Delta
$ 683
17 Aug
- 25 Aug
Alaska Airlines
$ 689
direct
09 Aug
- 05 Sep
KLM
$ 691
09 Aug
- 06 Sep
Air France
$ 691
10 Aug
- 05 Sep
KLM
$ 695
18 Aug
- 02 Sep
British Airways
$ 712
direct
Also check the deals for one-way flights from Seattle to London in August .
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