Seattle to London flight in December Prices

Buy ticket from the airline

With oil prices rocketing up, i would lock in the fare now before surcharges are added or rates go up more to account for the increasing fuel costs

My $0.03 ( 2 cents adjusted for inflation)

Are you an AARP member and/or do you have a Chase credit card? You could get over 10% off your tickets. Here is the article with details.

https://awardwallet.com/blog/british-airways-aarp-discount-chase-cardholders/

Have you considered Icelandair SEA to LGW (London Gatwick) for your dates? While it’s not a non-stop flight, considering the other options out of Seattle, if you’re flying main cabin, it can be a cost effective alternative. We’ve flown that route before and it’s what I would consider an easy 90 minute layover in KEF (Keflavik) in Reykjavik, Iceland. And, at the time, we felt that the savings was worth the inconvenience of a connection.

That said, I understand that not everyone enjoys the beehive of activity at KEF with the huge early morning shuffle of arriving and departing flights. I’ve seen others on this forum describe it as chaotic with no place to sit. We just thought it was very busy and crowded for such a small airport, but well organized.

And, I agree with Joe32F, the collective wisdom here is to look on the aggregators, but book directly with the airline.

I've bought several transatlantic tickets on United's website for flights on European carriers). Those were regular Economy tickets, not Basic Economy. The disadvantage is that in some cases it's difficult or even impossible to select a seat more than 24 hours before departure time. I've always been able to get a plain-vanilla aisle seat anyway, so I'll continue to do this if it saves $50 or so. (I also have a United credit card.)

The only American Airlines non-stop flights from Seattle to London are on British Airways planes (with an AA flight number). That low price is for “Basic Economy”: no changes allowed, no free checked bags, board last.

For Main Cabin on the same flights, it is $1206, the same as the price quoted on the BA website. This fare has change fees, but you can make changes. One free checked bag per person.

For either class, whether you book on AA or BA, you will have an additional fee if you want to choose your seats early, before online check-in time. At that time, if you haven’t paid to choose early, you will be automatically assigned seats, but you can change for free to any seats still available.

Tom, you are right. That AA flight did not show up when I looked at prices for December on the AA website. Just the two on BA that I know as BA 52 and BA 48 (our usual flight). I don’t think AA156 existed a couple of years ago—-I have not seen an AA plane at the international terminal at SeaTac (S gates) when we’ve been there for the BA flight departing just 2 gates away. But SeaTac recently finished an expansion of their international flight capacity, so maybe this new AA flight is the result.