Q: Can I fly back to Seattle/Tacoma Intl from London?

Returning to Seattle/Tacoma Intl from London COVID-19 testing requirements Visitors from London are not required to present a negative COVID-19 PCR test or antigen result upon entering Seattle/Tacoma Intl. Quarantine requirements Visitors from London are not required to quarantine after entering Seattle/Tacoma Intl.

Question 1

What is the cheapest airline to fly from Seattle to London round-trip?

Accepted Answer

Cheapflights users have booked flights from Seattle to London round-trip from $482. Users have found that Icelandair is 48% cheaper than the other options available to this destination.

Question 2

Can I fly to London from Seattle/Tacoma Intl right now?

Accepted Answer

Information is based on travel restrictions from Seattle/Tacoma Intl to London

Most visitors from Seattle/Tacoma Intl can enter London without restrictions.

COVID-19 testing requirements
Visitors from Seattle/Tacoma Intl are not required to present a negative COVID-19 PCR test or antigen result upon entering London.

Quarantine requirements
Visitors from Seattle/Tacoma Intl are not required to quarantine after entering London.

Question 3

Can I fly back to Seattle/Tacoma Intl from London?

Accepted Answer

Returning to Seattle/Tacoma Intl from London

COVID-19 testing requirements
Visitors from London are not required to present a negative COVID-19 PCR test or antigen result upon entering Seattle/Tacoma Intl.

Quarantine requirements
Visitors from London are not required to quarantine after entering Seattle/Tacoma Intl.

Question 4

What are the most popular airlines that fly from Seattle to London?

Accepted Answer

Before booking your flight from Seattle to London check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

Question 5

What are the most popular routes from Seattle to London?

Accepted Answer

When deciding which route to take from Seattle to London consider Seattle/Tacoma Intl - London Heathrow, Seattle/Tacoma Intl - London Gatwick or Seattle/Tacoma Intl - London City as they are the most popular.

Question 6

What are the cheapest flights from Seattle to London?

Accepted Answer

Looking at all options, your cheapest flight can be booked for $241. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for $562 on average our data indicates $2,515 when flying from Seattle to London.

Question 7

What are the most reliable airlines from Seattle to London?

Accepted Answer

Consider American Airlines (83%), Aer Lingus (83%) or Finnair (83%) when booking your flight. These represent the most reliable airlines when flying from Seattle to London.

Question 8

Can I find flights from Seattle to London for under $500 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from Seattle to London for under $500. The cheapest flight booked recently is on Icelandair for just $482, but on average you can expect to pay $497.

Question 9

Are there nonstop flights from Seattle to London for under $700 on Cheapflights?

Accepted Answer

Cheapflights has at least 20 direct flights from Seattle to London under $700. A good price for a nonstop flight from Seattle to London is less than $750.

Question 10

Are there last-minute flights available from Seattle to London for under $700?

Accepted Answer

There are currently 20+ open flights from Seattle to London within the next 7 days for less than $700.

Question 11

What airport do you fly from for flights from Seattle to London?

Accepted Answer

If you book a flight to London from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 16 flights from Seattle/Tacoma Intl to London per day from 20 different airlines.

Question 12

Which airlines flying from Seattle/Tacoma Intl to London have flexible cancellations due to COVID-19?

Accepted Answer

British Airways, Virgin Atlantic, and Icelandair are some of the carriers that may have flexible cancellation policies. You can use our site to filter for other airlines that may also have this kind of flexibility.

Question 13

What is the cheapest day to fly round-trip from Seattle to London?

Accepted Answer

Friday flights are found to be more expensive to fly from Seattle to London. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London.

Question 14

How far in advance should I book a flight from Seattle to London?

Accepted Answer

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 26 days in advance, which can save you up to 65% on flights from Seattle to London compared to booking the week you need them. Waiting 26 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $1,317. For sooner than that we have options available in the next 3 days from $1,834.

Question 15

What is the cheapest month to fly from Seattle to London?

Accepted Answer

February is one of the best times of the year to fly to London from Seattle. Prices for February average $937 per person but you can even find prices for as low as $625. The most expensive prices can be found in the month of July. Opting for a February flight can save you 25% on your journey compared to booking in July

Question 16

When is the cheapest time to fly from Seattle to London (SEA - LON)?

Accepted Answer

One of the essential ways to save on airfare from Seattle to London is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight in the morning could potentially save you up to 6% on airfare.

Question 17

Accepted Answer

Aer Lingus is one of the most popular airlines used for those traveling from Seattle to London. Flights on this route from Aer Lingus typically cost $1,110.27 RT, a price that is 49% more expensive than the average Seattle to London flight. The cheapest flight found was $786 RT. When traveling from Seattle to London on Aer Lingus, the most popular airport to depart from is Seattle/Tacoma Intl Airport and the most popular airport to arrive at is London Heathrow Airport. When flying from Seattle to London, Aer Lingus flights are 7% more popular than any other airline flying that same route.

Question 18

Accepted Answer

One of the most popular airlines traveling from Seattle to London is Icelandair. Seattle to London flights are typically 61% cheaper than other airlines traveling the same route. Flights from Icelandair typically cost $790.20 RT. The cheapest Icelandair flight found for this route was $661. The most popular departure airport in Seattle when flying to London is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London is London Heathrow Airport. When flying from Seattle to London, Icelandair flights are 5% more popular than any other airline flying that same route.

Popular in	July	High demand for flights, 20% potential price rise
Cheapest in	February	Best time to find cheap flights, 17% potential price drop
Round-trip from	$776	From Seattle/Tacoma Intl to London (LON)
One-way from	$229	One-way flight from Seattle/Tacoma Intl to London (LON)

Airline	Cheapest	Average	Flexibility	On-time	COVID-19 safety
Juneyao Airlines	Cheapest$11	Average$19	FlexibilityNo cancel fee	On-time66%	COVID-19 safety	Search Juneyao Airlines flights
Norwegian Air UK	Cheapest$377	Average$635	FlexibilityNo cancel fee	On-timeN/A	COVID-19 safety	Search Norwegian Air UK flights
Norwegian	Cheapest$403	Average$697	FlexibilityNo cancel fee	On-time74%	COVID-19 safety	Search Norwegian flights
Austrian Airlines	Cheapest$438	Average$877	FlexibilityNo cancel fee	On-time78%	COVID-19 safety	Search Austrian Airlines flights
Iberia	Cheapest$480	Average$772	FlexibilityNo cancel fee	On-time77%	COVID-19 safety	Search Iberia flights
Icelandair	Cheapest$587	Average$835	FlexibilityNo cancel fee	On-time76%	COVID-19 safety	Search Icelandair flights
Aer Lingus	Cheapest$628	Average$965	FlexibilityNo cancel fee	On-timeN/A	COVID-19 safety	Search Aer Lingus flights
Air France	Cheapest$661	Average$790	FlexibilityNo cancel fee	On-time77%	COVID-19 safety	Search Air France flights
Virgin Atlantic	Cheapest$668	Average$1,087	FlexibilityNo cancel fee	On-time72%	COVID-19 safety	Search Virgin Atlantic flights
Finnair	Cheapest$687	Average$963	FlexibilityNo cancel fee	On-time76%	COVID-19 safety	Search Finnair flights

0%of flight departures	Early morningMidnight to 6 am
0%of flight departures	Morning6 am to noon
52%of flight departures	AfternoonNoon to 6 pm
48%of flight departures	Evening6 pm to midnight

Sunday	10daily flights
Monday	20daily flights
Tuesday	15daily flights
Wednesday	14daily flights
Thursday	19daily flights
Friday	20daily flights
Saturday	20daily flights

Cheap flights from Seattle (SEA) to London (LON)

The best prices from Seattle/Tacoma Intl to London are usually found in February or March, booked 25 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

How to find the cheapest flight from Seattle (SEA) to London (LON)

All the information you need to plan the best SEA to LON flight in 2022: compare Seattle to London flight prices with the expected peak season, weather and rainfall in London.

What is the cheapest day to fly round-trip from Seattle to London?

How far in advance should I book a flight from Seattle to London?

What is the cheapest month to fly from Seattle to London?

When is the cheapest time to fly from Seattle to London (SEA - LON)?

Cheap flights from Seattle to London in October, November 2022

The best prices found for SEA to LON flights for October, November

Seattle to London 2022 flight deals

Cheap flights to London from Seattle found for this year

Cheap Aer Lingus flights from Seattle to London

Cheap Icelandair flights from Seattle to London

Non-stop flights to London from Seattle

Save time with Seattle to London direct flight deals

Last minute flights from Seattle to London

Late deals on return flights to London from Seattle, departing today and this week

One-way flights to London from Seattle

The cheapest one-way flights from Seattle to London

Related info for your journey

Useful info, stats and facts about Seattle to London flights.

What airport do you fly from for flights from Seattle to London?

Which airlines flying from Seattle/Tacoma Intl to London have flexible cancellations due to COVID-19?

Can I find flights from Seattle to London for under $500 on Cheapflights?

Are there nonstop flights from Seattle to London for under $700 on Cheapflights?

Are there last-minute flights available from Seattle to London for under $700?

What is the cheapest airline to fly from Seattle to London round-trip?

What are the most popular routes from Seattle to London?

What are the most popular airlines that fly from Seattle to London?

What are the most reliable airlines from Seattle to London?

What are the cheapest flights from Seattle to London?

Other flights from Seattle

Other flights to London

Flights to London from Seattle

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COVID Restrictions

Can I fly to London from Seattle/Tacoma Intl right now?

Can I fly back to Seattle/Tacoma Intl from London?

Alternative routes for Seattle to London

See prices for flight routes from nearby airports that may be better suited for you.

Top 10 airlines flying from Seattle to London

The chart below displays the airlines Cheapflights users traveling from Seattle to London choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2022

Hourly flight availability from Seattle to London

See what time of day planes typically take off from Seattle to London

Weekly flight availability from Seattle to London

See how many times per day planes take to the skies headed from Seattle to London