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Not ready to book? to track prices.Find the cheapest flights from London Gatwick Airport to Seattle
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Icelandair flights from London Gatwick Airport to Seattle
Our best Icelandair deals on London Gatwick Airport to Seattle flight tickets
Virgin Atlantic flights from London Gatwick Airport to Seattle
Our best Virgin Atlantic deals on London Gatwick Airport to Seattle flight tickets
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How to get the cheapest flight ticket from London Gatwick Airport 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, March is the cheapest month to fly from London Gatwick Airport to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $538. If you don’t want to visit Seattle in March, then you should wait until April to fly from London Gatwick Airport, when ticket prices are also cheap, with an average price of $563.
What is the cheapest day to depart on your flight to Seattle?
On average, the least expensive day to fly to Seattle from London Gatwick Airport is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $789. 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 London Gatwick Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,189.
What is the cheapest time of day to depart on your flight to Seattle?
Flying to Seattle from London Gatwick Airport at noon is the least expensive time of day to depart. momondo users have found prices as low as $845 when looking at flights departing at noon. Flights to Seattle are more costly in the morning, with an average ticket price of $938. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
How far in advance should I book a flight to Seattle?
You are more likely to see cheaper flights to Seattle from London Gatwick Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $726 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from London Gatwick Airport for as low as $469 on momondo.
When to book flights from London Gatwick Airport to Seattle
Cheap London Gatwick Airport to Seattle (LGW to SEA) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London Gatwick Airport to Seattle
How far is London Gatwick to Seattle/Tacoma Intl by plane?
A flight from London Gatwick to Seattle/Tacoma Intl will travel around 4798.7 mi. Typically, this will take 12h 50m by plane in normal conditions.
When did momondo last update prices for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport?
Prices for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport are refreshed on a daily basis.
How many operators does momondo search for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport?
As of July 2025, there is 1 operator available to choose from for flights from London Gatwick Airport to Seattle/Tacoma Intl Airport.
How old do you have to be to fly from London Gatwick Airport 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 London Gatwick Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from London Gatwick Airport to Seattle?
Based on momondo bookings for flights between London Gatwick Airport and Seattle, the leading airline is Icelandair, making up 100% of the total bookings.
Best airlines flying from London Gatwick Airport to Seattle
Compare and see reviews for airlines that fly from London Gatwick Airport to Seattle with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $418 | Free Cancellation | Rating 7.0 514 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 London to Seattle?
It is quick and easy to find London 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 London to Seattle with flexible booking policies on momondo?
momondo does allow users to show only those flights to Seattle from London which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from London to Seattle?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from London.
I’m not ready to book a flight from London to Seattle right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Seattle from London. 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.