Deal Brief
SEA to LHR is currently available as a round-trip redemption for 62,400 points plus $229.03 in taxes. This option prices in Economy through delta+alaska, with strong seat availability.
Route: Best Round-Trip Deal: Seattle to London
Route code: SEA -> LHR + LHR -> SEA
Program: Delta SkyMiles / Alaska Mileage Plan (Mixed)
Airline: Delta Air Lines / Alaska Airlines
Trip style: 5 days
Travel window: Multiple
Available dates:
September 2026 (13) cash price unavailable
- SEP-7 to SEP-12
- SEP-8 to SEP-13
- SEP-9 to SEP-14
- SEP-13 to SEP-18
- SEP-14 to SEP-19
- SEP-15 to SEP-20
- SEP-16 to SEP-21
- SEP-20 to SEP-25
- SEP-21 to SEP-26
- SEP-22 to SEP-27
- SEP-23 to SEP-28
- SEP-27 to OCT-2
- SEP-28 to OCT-3
October 2026 (12) cash price unavailable
- OCT-4 to OCT-9
- OCT-7 to OCT-12
- OCT-11 to OCT-16
- OCT-13 to OCT-18
- OCT-14 to OCT-19
- OCT-18 to OCT-23
- OCT-20 to OCT-25
- OCT-21 to OCT-26
- OCT-25 to OCT-30
- OCT-26 to OCT-31
- OCT-27 to NOV-1
- OCT-28 to NOV-2
November 2026 (14) cash price unavailable
- NOV-3 to NOV-8
- NOV-4 to NOV-9
- NOV-8 to NOV-13
- NOV-9 to NOV-14
- NOV-10 to NOV-15
- NOV-11 to NOV-16
- NOV-15 to NOV-20
- NOV-16 to NOV-21
- NOV-17 to NOV-22
- NOV-18 to NOV-23
- NOV-24 to NOV-29
- NOV-25 to NOV-30
- NOV-29 to DEC-4
- NOV-30 to DEC-5
Cash fares are approximate round-trip prices via Travelpayouts. Point value = (cash fare − taxes) ÷ points. delta+alaska baseline: 1.3¢/pt.
Additional Deal Information
Data Last Refreshed
Quality Score Breakdown · 68/100
Absolute Cost
20 / 50
Seat Availability
10 / 10
Cabin Tier
0 / 10
Freshness
1 / 1
Destination Tier
8 / 8
Tax Efficiency 22% cash
12 / 18
Airline Product
0 / 7
Additional Flight Information
Outbound · SEA → LHR
Booked via Delta SkyMiles
Airline: Delta Air Lines
Return · LHR → SEA
Booked via Alaska Mileage Plan
Airline: Alaska Airlines
Mixed booking: This round trip uses two different loyalty programs for the best combined price.
The booking program is where you redeem points. Different programs may price the same flight differently.