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Change your flight without a fee on select flights
As soon as you receive your boarding pass for your United Airlines flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to London (LHR-Heathrow), check if the terminal details are listed on it. If not, get in touch with your carrier. They'll be able to tell you exactly where you'll be flying in and out of.
Unfortunately, there aren't any direct flights between Seattle, WA (SEA-Seattle - Tacoma Intl.) and London (LHR-Heathrow) with United Airlines. Be ready to make a stopover if you need to travel on this particular airline and route.
Your United Airlines flight from SEA to LHR should take around 11 hours and 25 minutes, so it's wise to pack an extra set of clothes and some toiletries for the long journey. If you want to keep restlessness and boredom at bay, toss some books and puzzles in your hand luggage as well.
You have a good range of options if you're heading from SEA to LHR. You'll find at least 23 United Airlines flights available monthly.
For more info about changing your flight to London (LHR-Heathrow), please visit our Customer Service Portal.
This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start of the week is when prices are generally at their highest.
Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2019, flights departing on a Tuesday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.
Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks prior to their travel dates.
We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.
*According to flight demand on Travelocity.com from January to December 2019. Savings are subject to change based on departure location, date and destination.
|Airport Code||Country||Airport Name||Number of Flights|
|IAH||USA||George Bush Intercontinental||136|
|IAD||USA||Washington Dulles Intl.||100|
|SFO||USA||San Francisco Intl.||64|
|LAX||USA||Los Angeles Intl.||23|
Jan 23 - Jan 24
It was very clean and comfortable. It was obvious that they take their guests health seriously. Breakfast was lovely and very tasty served by a lovely young lady by the name of Edyt.
Feb 7 - Feb 8
Very clean and modern. It had all the amenities I could want, and the Nest restaurant had very good food. The only thing that kept this review from being perfect was the proximity to the airport. It was not clear from the hotel information I read through online that this hotel was not attached to ...
Jan 18 - Jan 19
Beautiful room and curteoud service. Good breakfast