Business Class Flights to Seattle from the UK — from £1,749

Seattle is the only American city we sell where Glasgow holds the cheapest fare. Business Class starts from £1,749 return — £12 below London.

It is a curiosity rather than a recommendation, because Glasgow has no Seattle nonstop and London does. But it is worth knowing, because it is the kind of result that makes people assume there is a bargain where there is really a connection. Seattle also sits eight hours behind the UK, as far back as the American mainland goes, which changes how you should plan the trip. The rest of our American network sits under Business Class flights to the USA, and the wider programme under Business Class flights from the UK.

How much are Business Class flights to Seattle from the UK?

Our current fares to Seattle (SEA), by UK departure airport. Per passenger, return, subject to availability.

Other cabins on the same route: Economy from £525, Premium Economy flights from the UK from £967, and First Class flights from the UK from £2,869.

£12 is not a saving on this route

Glasgow's only US nonstop service is United to Newark, and it is seasonal. There is no Glasgow–Seattle nonstop at any time of year, so the Glasgow fare is a connecting itinerary from the outset.

London is £12 more and has the nonstop. When we checked, a connecting itinerary to Seattle took anywhere from twelve and three-quarter hours to almost thirty-one, against nine hours fifty-five nonstop. Twelve pounds does not buy back three hours, and it certainly does not buy back twenty-one.

For a Scottish traveller the honest comparison is Glasgow-with-a-connection against a flight or train to Heathrow and a nonstop. On a journey this long, the nonstop usually wins.

How long is the flight from the UK to Seattle?

We checked what was genuinely on sale for a single common date — 15 November 2026, departing London Heathrow. Real bookable itineraries, one day's availability rather than a timetable.

Three times the journey for the same city on the same day. The two slowest itineraries were both mixed-cabin — the long-haul sector in Business and the onward leg in something else — which is worth knowing before you compare them on price alone.

Which airlines fly from the UK to Seattle?

Three carriers appear on the London Heathrow–Seattle nonstop in the airport's own route table: British Airways, Delta and Virgin Atlantic.

Seattle–Tacoma's published figures put London–Heathrow as its fourth busiest international route, with 541,199 passengers — the strongest European connection the airport has.

The carrier count changes through the year

Virgin Atlantic's Heathrow–Seattle service is seasonal, and Virgin also reduced its Heathrow flying for autumn and winter 2026. So the number of airlines on the nonstop is not constant: in summer you have a genuine choice, and outside it the field narrows.

That matters more than it sounds on a route where the alternative is a twelve-to-thirty-hour connection. If you are travelling in the northern winter, check what is actually operating on your dates before assuming the summer picture holds.

A correction to our own record

An earlier pass of our research listed Alaska Airlines on the Heathrow–Seattle nonstop. Reading the airport's own route-specific table directly does not support that — it names British Airways, Delta and Virgin Atlantic. We have taken the route table as the more specific source and dropped the Alaska claim rather than carry it forward unverified.

Of the airlines on this route, British Airways Business Class has its own cabin page worth reading before you choose. The American carriers do not, so we describe their products when we quote rather than linking you to a page that does not exist.

Which UK airport is cheapest for Seattle?

Seattle has the biggest time difference in this group

Seattle is eight hours behind the UK for most of the year — three hours further than Boston, Washington or Miami, and two further than Chicago or Dallas. That is a genuine planning factor rather than a detail.

A UK working day has almost finished by the time Seattle's begins. Mid-afternoon in London is breakfast in Seattle, and by the time Seattle is properly at work most of the UK has gone home. If you are travelling for business and need to stay in contact with a UK office, expect early mornings or late evenings — this is the first city in our American programme where the overlap genuinely runs out.

It also affects the trip itself. Westbound you land having gained most of a day, which is pleasant; eastbound you lose it, and the return overnight is long. If your schedule allows, give yourself a recovery day at the far end rather than landing into a morning of meetings.

Arriving at Seattle–Tacoma

Seattle–Tacoma sits south of the city and is connected to downtown by light rail, which is genuinely useful after a ten-hour flight and unusual among American airports.

You clear US Customs and Border Protection at Seattle. Processing is thorough and queue length varies with the arrivals bank; an approved ESTA does not shorten it. If you are connecting onwards — to Alaska, Portland or elsewhere in the Pacific Northwest — you collect bags, clear customs and re-check first, so allow real time.

Check the cabin on every sector

Two of the connecting Seattle itineraries we found were mixed cabin: one sold as Business Class plus Economy and one Business Class plus Premium Economy. On a route where the connecting options are already twelve to thirty hours, arriving on an economy seat at the end of it is worth knowing about in advance.

Ask which cabin applies to each sector rather than to the ticket as a whole. We will tell you before you book.

How Seattle compares with the rest of our US network

We checked every US city in this group on the same day, so the comparison is a fair one.

Seattle is not the longest flight in the group — Dallas is — but it is the furthest from the UK in the way that actually affects a trip. Eight hours of time change is what turns a three-day visit from tiring into counterproductive.

How to book Seattle well

• Do not be led by the Glasgow fare. £12 does not cover a connection of three to twenty-one extra hours.
• Check which carriers are flying on your dates, not in summer — one of the three is seasonal.
• Check the cabin on every sector. Seattle's slower connecting options were disproportionately mixed cabin.
• Plan around eight hours, not ten. The time change costs more than the flight time on a short trip.
• Allow a recovery day if your schedule can take it, particularly on arrival.
• Tell us if a cruise is involved. Sailing deadlines change what margin the itinerary needs.
• Apply for the ESTA when you start planning, not after you book.

Seattle for business travellers

Seattle's UK business traffic is dominated by technology, cloud and aerospace, and the trips tend to be either very short or quite long, with little in between. Both shapes are shaped by the same thing: the eight-hour time difference.

For a short trip, the nonstop is close to essential. Adding three to twenty-one hours of connection to a journey that already costs you a day of adjustment is how a two-day visit becomes useless. With one of the three carriers seasonal, it is also worth checking the nonstop exists in the form you expect before you fix the dates.

For a longer trip, the constraint moves to the UK end. With almost no overlap between a UK and a Seattle working day, staying genuinely connected to a UK office means choosing which end of the day to sacrifice. Most people find it easier to take UK calls early in the Seattle morning than to work late Seattle evenings — worth deciding deliberately rather than discovering.

The light rail link into the city helps on arrival, and it is one of the few large American airports where public transport is a realistic option straight off a long-haul flight.

When should you travel, and when should you book?

We are not going to name a cheapest month — we have no evidence for one, and a demand pattern is not a price.

The schedule is the honest signal here and it matters more on Seattle than on most routes, because Virgin Atlantic's Heathrow–Seattle service is seasonal and Virgin reduced Heathrow capacity for autumn and winter 2026. The nonstop continues year-round with the other carriers, but the choice of departures and products narrows outside the summer.

If you are travelling in the northern winter, check what is actually operating on your dates. On a route where the fallback is a twelve-to-thirty-hour connection, that check is worth making before you commit to dates.

On booking timing, an honest answer: we have no data supporting a "book X weeks ahead" rule. Premium cabins hold few seats and the well-timed nonstops fill first. If your dates can move a day or two, tell us.

Business Class, Premium Economy or Economy to Seattle?

The eight-hour time difference strengthens the case for a flat bed more than the flight length alone would. On the eastbound return you are flying overnight and losing most of a day, and the difference between sleeping and not is the difference between a usable first day home and a wasted one.

Seats, beds and why the aircraft matters

"Business class" describes a fare, not a seat. Across the carriers on this route you will find enclosed suites with a door, open lie-flat seats in staggered or herringbone layouts, and on some aircraft older seats that are less private and lack direct aisle access. All are sold as business class, and aircraft are substituted after booking.

Seattle adds a seasonal wrinkle: because one of the three carriers only flies the route in season, which cabins are available genuinely changes through the year. Ask which airline and which aircraft is scheduled on your date — we check it when we quote.

Travelling as a couple

Layouts differ between carriers and between aircraft within each. In a 1-2-1 staggered cabin the middle pair are sometimes genuinely together and sometimes separated by a console; in a herringbone cabin you may be angled away from each other entirely. Over ten hours that is not a small detail — tell us and we will check the seat map.

What Seattle is for

Seattle is a technology and aerospace centre with a substantial UK business flow, and it is also the natural gateway to the Pacific Northwest — the Olympic Peninsula, the Cascades, and onward into British Columbia or Alaska.

Those two trips have different requirements. A business visit is usually short, which makes the eight-hour time difference and the nonstop both matter a great deal. A Pacific Northwest trip is usually longer and often involves onward travel by road, ferry or a short flight, in which case the questions that matter are the cabin on any onward sector and how much time you have allowed for US entry at Seattle.

A good number of UK travellers also use Seattle as the start or end of an Alaska cruise. If that is your plan, tell us when you enquire — the timing constraints are unusually tight at both ends, and an itinerary that works for a city break may not leave enough margin for a sailing.

Entry requirements for the United States

Travelling under the Visa Waiver Program requires an ESTA arranged in advance and a passport with an embedded chip. US Customs and Border Protection recommends applying as soon as you begin planning, and before buying tickets rather than after.

The limit of what an ESTA does is worth being precise about. It authorises travel; it does not grant admission. CBP: "Authorization via ESTA does not determine whether a traveler is admissible to the United States. U.S. Customs and Border Protection officers determine admissibility upon travelers' arrival." GOV.UK: "A valid ESTA or visa does not guarantee entry."

An approved ESTA runs up to two years, or until your passport expires, whichever is first, and covers multiple trips. Applicants must now also provide a selfie photograph. Eligibility is restricted by certain prior arrests or convictions, a previous deportation or refusal of admission, a history of overstaying, travel to Iran, Iraq, Libya, North Korea, Somalia, Sudan, Syria or Yemen after March 2011, or travel to Cuba on or after 12 January 2021.

There is a fee, which has risen more than once in recent years. We do not print a figure because the ones circulating online go out of date — check the current amount on the official site when you apply.

Apply at esta.cbp.dhs.gov and read the current UK guidance at GOV.UK USA entry requirements. Rules change — check before you book and again before you travel. We cannot give immigration advice.