# London (LCY) to Seattle (SEA) business class reward flights

Source: https://miles.zone/routes/lcy-sea
Data updated: 2026-10-17T23:33:03.555Z
Cash amounts are in US dollars.

Fewest points: 85,000 Atmos points plus $425 on British Airways through Atmos Rewards, departing 2026-11-04.

## Every program and airline that can book it, next 60 days

| Airline | Program | Points | Cash on top | Routing | Departs | Checked |
| --- | --- | --- | --- | --- | --- | --- |
| British Airways | [Atmos Rewards](https://miles.zone/programs/atmos-rewards) | 85,000 Atmos points | $425 | via DUB, PHL | 2026-11-04 | 17 Oct 2026, 23:33 UTC |
| KLM | [Air France-KLM Flying Blue](https://miles.zone/programs/flying-blue) (Light fare) | 173,000 miles | $829 | via AMS, CDG | 2026-11-23 | 17 Oct 2026, 11:52 UTC |

## Route facts

Over the next 60 days we hold business class seats from London to Seattle on 19 of the 19 departure days we have checked so far (41 days are not checked yet), through 2 programs. These figures are counted from the seats stored for those dates, not from a price history; the typical day is the median of each day's cheapest seat.

| Program | Days with space | Lowest | Typical day | Cash on top |
| --- | --- | --- | --- | --- |
| [Atmos Rewards](https://miles.zone/programs/atmos-rewards) | 16 of 19 checked | 85,000 Atmos points | 85,000 Atmos points | $425 to $444 |
| [Air France-KLM Flying Blue](https://miles.zone/programs/flying-blue) | 12 of 19 checked | 173,000 miles | 277,500 miles | $829 |

No nonstop seats in the window.
With a connection on British Airways and KLM.

## How to book it

1. [Atmos Rewards](https://miles.zone/programs/atmos-rewards) books on alaskaair.com: sign in there, search LCY to SEA in business class on a date with space, and pay in Atmos points with the cash on top (from $425).
2. [Air France-KLM Flying Blue](https://miles.zone/programs/flying-blue) books on airfrance.fr: sign in there, search LCY to SEA in business class on a date with space, and pay in miles with the cash on top (from $829).

MilesZone finds the seat; it does not book it or take payment.

## More routes from London

- [Amsterdam (AMS)](https://miles.zone/routes/lcy-ams)
- [Berlin (BER)](https://miles.zone/routes/lcy-ber)
- [Belfast (BHD)](https://miles.zone/routes/lcy-bhd)
- [Dublin (DUB)](https://miles.zone/routes/lcy-dub)
- [Edinburgh (EDI)](https://miles.zone/routes/lcy-edi)
- [Glasgow (GLA)](https://miles.zone/routes/lcy-gla)
- [Geneva (GVA)](https://miles.zone/routes/lcy-gva)
- [Milan (LIN)](https://miles.zone/routes/lcy-lin)
- [Nice (NCE)](https://miles.zone/routes/lcy-nce)
- [Rotterdam (RTM)](https://miles.zone/routes/lcy-rtm)
- [Zurich (ZRH)](https://miles.zone/routes/lcy-zrh)
- [CMF (CMF)](https://miles.zone/routes/lcy-cmf)

## More routes to Seattle

- [Paris (CDG)](https://miles.zone/routes/cdg-sea)
- [Amsterdam (AMS)](https://miles.zone/routes/ams-sea)
- [Dublin (DUB)](https://miles.zone/routes/dub-sea)
- [Edinburgh (EDI)](https://miles.zone/routes/edi-sea)
- [Frankfurt (FRA)](https://miles.zone/routes/fra-sea)
- [London (LHR)](https://miles.zone/routes/lhr-sea)
- [Manchester (MAN)](https://miles.zone/routes/man-sea)
- [Munich (MUC)](https://miles.zone/routes/muc-sea)
- [Barcelona (BCN)](https://miles.zone/routes/bcn-sea)
- [Madrid (MAD)](https://miles.zone/routes/mad-sea)
- [Doha (DOH)](https://miles.zone/routes/doh-sea)
- [Dubai (DXB)](https://miles.zone/routes/dxb-sea)