# Southampton (SOU) to Boston (BOS) business class reward flights

Source: https://miles.zone/routes/sou-bos
Data updated: 2026-10-18T04:18:35.446Z
Cash amounts are in US dollars.

Fewest points: 45,000 Atmos points plus $402 on Aer Lingus through Atmos Rewards, departing 2026-12-01.

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

| Airline | Program | Points | Cash on top | Routing | Departs | Checked |
| --- | --- | --- | --- | --- | --- | --- |
| Aer Lingus | [Atmos Rewards](https://miles.zone/programs/atmos-rewards) | 45,000 Atmos points | $402 | via DUB | 2026-12-01 | 8 Oct 2026, 10:23 UTC |
| KLM | [Air France-KLM Flying Blue](https://miles.zone/programs/flying-blue) (Standard fare) | 90,000 miles | $792 | via AMS, JFK → LGA (change airports) | 2026-11-23 | 18 Oct 2026, 04:18 UTC |

## Route facts

Over the next 60 days we hold business class seats from Southampton to Boston on 55 of the 55 departure days we have checked so far (5 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) | 50 of 55 checked | 45,000 Atmos points | 175,000 Atmos points | $402 to $412 |
| [Air France-KLM Flying Blue](https://miles.zone/programs/flying-blue) | 26 of 55 checked | 90,000 miles | 135,500 miles | $782 to $812 |

No nonstop seats in the window.
With a connection on Aer Lingus and KLM.

## How to book it

1. [Atmos Rewards](https://miles.zone/programs/atmos-rewards) books on alaskaair.com: sign in there, search SOU to BOS in business class on a date with space, and pay in Atmos points with the cash on top (from $402).
2. [Air France-KLM Flying Blue](https://miles.zone/programs/flying-blue) books on airfrance.fr: sign in there, search SOU to BOS in business class on a date with space, and pay in miles with the cash on top (from $782).

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

## More routes from Southampton

- [Algiers (ALG)](https://miles.zone/routes/sou-alg)
- [Amsterdam (AMS)](https://miles.zone/routes/sou-ams)
- [Paris (CDG)](https://miles.zone/routes/sou-cdg)
- [Oran (ORN)](https://miles.zone/routes/sou-orn)
- [Tunis (TUN)](https://miles.zone/routes/sou-tun)
- [Manama (BAH)](https://miles.zone/routes/sou-bah)
- [Washington (IAD)](https://miles.zone/routes/sou-iad)
- [Tel Aviv (TLV)](https://miles.zone/routes/sou-tlv)
- [Beirut (BEY)](https://miles.zone/routes/sou-bey)
- [Chennai (MAA)](https://miles.zone/routes/sou-maa)
- [Colombo (CMB)](https://miles.zone/routes/sou-cmb)
- [Amman (AMM)](https://miles.zone/routes/sou-amm)

## More routes to Boston

- [London (LHR)](https://miles.zone/routes/lhr-bos)
- [Amsterdam (AMS)](https://miles.zone/routes/ams-bos)
- [Paris (CDG)](https://miles.zone/routes/cdg-bos)
- [Dublin (DUB)](https://miles.zone/routes/dub-bos)
- [Edinburgh (EDI)](https://miles.zone/routes/edi-bos)
- [Frankfurt (FRA)](https://miles.zone/routes/fra-bos)
- [Madrid (MAD)](https://miles.zone/routes/mad-bos)
- [Manchester (MAN)](https://miles.zone/routes/man-bos)
- [Barcelona (BCN)](https://miles.zone/routes/bcn-bos)
- [Rome (FCO)](https://miles.zone/routes/fco-bos)
- [Munich (MUC)](https://miles.zone/routes/muc-bos)
- [London (LGW)](https://miles.zone/routes/lgw-bos)