sea-to-stn

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The cheapest times to fly from SEA to STN are

  • January 15th to June 3rd (except the weeks of March 19th and May 21st)
  • September 10th to October 21st

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SEA to STN is early May. Prices can be as high as $10500 for Friday flights during mid December, or as low as $607 for Monday flights around early May.

 

When to Fly to London

Flying from Seattle, WA (SEA) to London (STN) will usually cost between $632 to $1423 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early May with an average ticket price of $716. Due to high demand the most expensive time to fly is mid December, with an average price of $3151. Planning your trip to low-cost times can easily save you $2435 on economy flights and even more on first-class flights. Generally, any price below $856 can be considered a good price for a round-trip SEA to STN flight.

See below for a graph of average weekly prices for the SEA to STN route. All prices are for round-trip tickets in USD.

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SEA to STN Flight Prices

Compared to other flights, the SEA to STN flight is cheaper than the average and costs less than the average flight leaving from Seattle. The average price per mile (for a direct flight) is $0.11, which is far below average.

 

Flight Prices by Day of the Week

Monday is usually the cheapest day to fly to STN, and Thursday the cheapest day to fly back into SEA. Fridays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $317 (27%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $847. Return trip prices are from the STN to SEA flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

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Departure Day Prices

Return Trip Prices by Day

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Return Day Prices

 

Nonstop Flights and Layovers

Travelers looking to fly from SEA to STN can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 9 hour 35 minutes may not be realistic.

 

Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from SEA to STN while comparing.

Destination alternative #1: London Heathrow Airport (LHR) in London

  • 41 miles (66 km) away from STN
  • Usually 42.29% less expensive than STN
  • Nonstop flights available

See SEA to LHR flights

Destination alternative #2: London Gatwick Airport (LGW) in London

  • 54 miles (87 km) away from STN
  • Usually 41.18% less expensive than STN
  • Nonstop flights available

See SEA to LGW flights

Destination alternative #3: London City Airport (LCY) in London

  • 27 miles (43 km) away from STN
  • Usually 33.41% less expensive than STN
  • 1-layover flights available

See SEA to LCY flights

Destination alternative #4: Manchester Airport (MAN) in Manchester

  • 146 miles (235 km) away from STN
  • Usually 32.36% less expensive than STN
  • Nonstop flights available

See SEA to MAN flights

Destination alternative #5: Birmingham Airport (BHX) in Birmingham

  • 93 miles (150 km) away from STN
  • Usually 27.34% less expensive than STN
  • 1-layover flights available

See SEA to BHX flights

Destination alternative #6: Bristol Airport (BRS) in Bristol

  • 131 miles (211 km) away from STN
  • Usually 15.71% less expensive than STN
  • 1-layover flights available

See SEA to BRS flights

 

Flight Hacking SEA to STN

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from SEA to STN — but Champion Traveler does!

Hack #1: Dublin (SEA > DUB > STN)

  • Price for both tickets: $666
  • Average savings: $190 (22.2%)

See SEA to DUB flights

Hack #2: Glasgow (SEA > GLA > STN)

  • Price for both tickets: $738
  • Average savings: $118 (13.79%)

See SEA to GLA flights

Hack #3: Oslo (SEA > OSL > STN)

  • Price for both tickets: $767
  • Average savings: $89 (10.4%)

See SEA to OSL flights

 

Flight Questions Answered

Still have questions about flying from SEA to STN? We’ve got answers.

Which airlines fly this route?

You can find 14 major airlines flying this route most often: Air Canada, Air France, Alaska, American, atlasglobal, British Airways, Delta, Eurowings, KLM, Lufthansa, SAS, United, WestJet, Wideroe, and potentially more during busy seasons.

How far away is it from London Stansted Airport to Seattle/Tacoma International Airport?

The distance between the two airports is roughly 4781 miles or 7694 kilometers.

How long does it take to fly from SEA to STN?

The real-world flight time for a nonstop SEA to STN flight is about 9 hour 35 minutes.

How many flights go between Seattle, WA and London?

It depends on the day of the week and the date, but a typical day might have around 53 available flights from SEA to STN.

 

Airport Location Info

 

Departing Airport

Origination codeSEA
Origination airport nameSeattle/Tacoma International Airport
CitySeattle, WA
Countrythe United States
Latitude47.5
Longitude-122.3

Return Airport

Destination codeSTN
Destination airport nameLondon Stansted Airport
CityLondon
Countrythe United Kingdom
Latitude51.9
Longitude0.2

 

Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.