Cheap flights from the United Kingdom to Seattle from $311
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from the United Kingdom to Seattle departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from United Kingdom to Seattle
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Seattle?
In general, January is the cheapest month to fly from United Kingdom to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $632. If you don’t want to visit Seattle in January, then you should wait until March to fly from United Kingdom, when ticket prices are also cheap, with an average price of $657.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from United Kingdom is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $791. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Friday is the most expensive day to depart from United Kingdom because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,196.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from United Kingdom at noon is the least expensive time of day to depart. momondo users have found prices as low as $843 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $949. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest United Kingdom to Seattle/Tacoma Intl flight route?
Fly from London Heathrow to Seattle/Tacoma Intl for the best United Kingdom - Seattle/Tacoma Intl flight prices
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from United Kingdom when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $781 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from United Kingdom for as low as $699 on momondo.
What cabin class options are available on United Kingdom to Seattle/Tacoma Intl flights?
There are 4 cabin classes available to choose from on United Kingdom to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from United Kingdom to Seattle/Tacoma Intl?
WestJet, Aer Lingus, and Icelandair are the most popular carriers operating from United Kingdom to Seattle/Tacoma Intl
What airlines fly to Seattle?
British Airways, Delta and Virgin Atlantic are the top three most popular airlines that fly to Seattle from United Kingdom according to our data. British Airways is the first choice among our users, with 36% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 7 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.
How many flights depart from United Kingdom to Seattle on average per day?
As of June 2025, 21 flights take off from United Kingdom and land in Seattle each day. The most common flight departure time for this route is 4:00PM, with 68% of daily flights taking off in the afternoon.
How many flights depart from United Kingdom to Seattle on average per week?
As of June 2025, 148 flights take off from United Kingdom and land in Seattle each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.
Cheap United Kingdom to Seattle flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from United Kingdom to Seattle
When did momondo last update prices for flights from United Kingdom to Seattle/Tacoma Intl Airport?
Prices for flights from United Kingdom to Seattle/Tacoma Intl Airport were last updated today.
How many operators does momondo search for flights from United Kingdom to Seattle/Tacoma Intl Airport?
There are 7 operators available for flights from United Kingdom to Seattle/Tacoma Intl Airport as of June 2025.
How old do you have to be to fly from United Kingdom to Seattle/Tacoma Intl Airport?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from United Kingdom to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from United Kingdom to Seattle?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from United Kingdom to Seattle is Airbus A330-900neo (26.30% of total bookings). The next most popular plane models are Boeing 787-10 Dreamliner (25.27%), Boeing 777-300ER (15.50%), and Boeing 787-9 Dreamliner (10.05%).
Best airlines flying from United Kingdom to Seattle
Compare and see reviews for airlines that fly from United Kingdom to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $402 | Free Cancellation | Rating 7.0 499 reviews | |||
| PriceFrom $551 | Free Cancellation | Rating 6.6 7,019 reviews | |||
| PriceFrom $575 | Free Cancellation | Rating 7.0 2,778 reviews | |||
| PriceFrom $594 | Free Cancellation | Rating 7.4 652 reviews | |||
| PriceFrom $620 | Free Cancellation | Rating 7.1 1,118 reviews | |||
| PriceFrom $620 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $632 | Free Cancellation | Rating 8.0 7,963 reviews |
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from United Kingdom to Seattle?
It is quick and easy to find United Kingdom to Seattle flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Seattle that suits you.
Can I find flights from United Kingdom to Seattle with flexible booking policies on momondo?
Flights from United Kingdom to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from United Kingdom to Seattle?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from United Kingdom to Seattle.
I’m not ready to book a flight from United Kingdom to Seattle right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Seattle from United Kingdom. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.