Just how many Avios to fly from London to Seattle

Avios overview

All of the points and surcharges referenced on this page are for a single journey (not return) and per person. Surcharges on a return flight may be less than double that of a single, depending on the element of the surcharge that relates to airport and country taxes.

Flying from London to Seattle will cost you a minimum of 33,000 in economy, assuming that you fly on an off-peak day.

Want to upgrade to premium economy? You can do that for an extra 41,250 Avios. Premium economy pricing will cost you a minimum of 74,250

Club World (Business Class) will require either 99,000 (off peak) or 0 (peak) Avios.

First Class seats will cost you between 99,000 (off peak) and 0 (peak) Avios. One thing to note is that First Class tickets are the only ticket type with BA that allows you to select your seats for free.

Find out which dates are peak, or off-peak in 2026.

Seattle Avios needed table

Cabin	Avios Needed (Off-Peak)	Avios Needed (Peak)
Economy	33,000	38,500
Premium Economy	74,250	0
Business	99,000	0
First	110,000	0

Seattle Avios & cash combinations

On most flights you can choose to reduce the number of points needed for a flight, and pay a higher cash element. This is called Reward Flight Saver. When you select a cabin during a search for a reward flight you'll see a breakdown of the points you need at the base of the page. Clicking "more pricing options" will give you five alternatives, where you use fewer points but pay more cash.

This is useful if you don't have enough Avios for a flight OR if you want to preserve more points for the future. You do not select an alternative points/cash combination on this page. Click Continue and you'll be able to make a decision on the next page. By default BA will select the combination with the highest number of Avios and lowest cash element based on the Avios you currently have in your account or household account.

Cabin Option	Off-Peak (Avios + Cash)	Peak (Avios + Cash)
Economy	33,000 + £85 25,350 + £165 17,900 + £240 12,750 + £265 9,400 + £300 6,400 + £325	38,500 + £85 32,000 + £165 27,500 + £240 21,000 + £265 15,500 + £300 9,650 + £325
Premium Economy	74,250 + £200 60,500 + £255 55,000 + £315 45,100 + £360 33,000 + £420 22,000 + £470	-
Business	99,000 + £249.5 83,650 + £399.5 68,750 + £529.5 59,500 + £709.5 46,250 + £909.5 33,000 + £1059.5	-
First	110,000 + £574.54 99,000 + £719.54 82,500 + £884.54 66,000 + £1054.54 60,150 + £1104.54 55,000 + £1169.54	-

How to make your Avios go further

If you're based in the UK then there's a way to make your Avios go even further, and that's through a Companion Voucher. I've written extensively about these amazing vouchers. They're not free in that you have to spend at least £15,000 on an Amex Card, but they're absolutely worth it. Read my guide on is a BA companion voucher worth it? to understand how to use a 2-4-1 voucher. On top of that, you can also use a Barclays Cabin Upgrade voucher to reduce the number of points needed. You can get these by either being a Barclays Premier customer, or by hitting a spend level on a Barclaycard.

How can you search for reward seat availability?

BA offers a number of ways to search for reward seats: their "Reward Flight Finder", their in-app "Reward Flights" section and just making a dummy booking. There are also third party tools that you can use, although I've managed to find plenty of seats without having to pay for a platform. I wrote about the best (and worst) ways to search for Avios availability. If you're looking to book seats to a popular destination then planning ahead is critical: seats become available 355 days before the flight date. If you're flying in Business Class or First Class, or you're a Silver BA Club member or higher, you'll be able to access the newly refurbished BA lounge at Seattle. This space has stunning views across the airport, and it's been upgraded with a new bar, as well as having all the furniture updated.

London to Seattle Avios Frequently Asked Questions