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A good sale to London.  You can save a few bucks via a Toronto or Vancouver routing on both outbound and return. We would spend the extra few bucks and avoid it — why? You have to go through Canadian immigration going and coming.

London, England – Photo: Lies Thru a Lens via Flickr, used under Creative Commons License (By 2.0)

Sample Travel Date:

• April 24th – May 1st

• This is just ONE SAMPLE travel date, for more availability, please follow the “Fare Availability” and “How to Search for Availability” instructions below

Fare Availability:

• Valid for travel from mid April – early May. A 7 day minimum stay is required. Must purchase at least 28 days in advance of departure.

• Please note that while this fare is valid at time of posting, if this post is more than two days old, the fare is likely gone.

How to Search for Availability:

• Use ITA Software Matrix Airfare Search and use the following search criteria:
  • Departing from: SEA
  • Outbound Advanced Routing Code: ua+ /f bc=k
  • Destination:  LHR
  • Return Advanced Routing Code: ua+ /f bc=k
  • (Click on Advanced Routing Codes link to enable advanced routing code input)
  • Select “See calendar of lowest fares”
  • Length of stay “5-12” (This is just a sample, you can use any 7 day date range like 3-10, 7-14 etc)
• Beginner’s Guide on How to Use Matrix by ITA Software
• How to Read Airfare Rules and Use It to Your Advantage

You cannot buy tickets using ITA. To buy, follow our instructions in the “How to Book” section below.

Fare Class:

• K

Elite Qualifying Dollars:

• $425

Routing:

• SEA – EWR (Newark) – LHR (London) – SFO (San Francisco) – SEA

Stopover:

• Not permitted
• How to Take Advantage of a Stopover

Global Premier Upgrade Fare (for United 1K and GS members):

• W Class
• $1,431

Mileage:

• Miles Flown: 11,913 miles or 5.4 cents per mile
  
  
• Elite Qualifying Miles: 11,913 miles
• Redeemable Miles: 2,125 miles

How to Book:

• Support us by using our Priceline link to book with dates found on ITA Software Matrix Airfare Search.
  • Priceline’s risk free 24 hour cancellation policy here.

Background Information:

• Visa: US Citizens – not required. Other nationals, check the TIMATIC Visa Database
• Currency: British Pound (GBP). $1USD = 0.80 GBP

Tips for saving when using credit cards at international destinations:

• No Foreign Transaction Fee Credit Cards to save on international purchases
• Don’t get hit with Dynamic Currency Conversion
• Get your taxes refunded when shopping
• How to Avoid International Data Roaming Charges

For more of the latest cheap Seattle Flight Deals:

• Go to the The Seattle Flight Deals page

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* The Flight Deal will receive a commission if you use the Priceline, accommodation, car rental, activities, or travel insurance affiliate links to make a booking or apply and is approved for a credit card using our link above. Thank you for your continuing support.

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The Flight Deal does not sell travel products or services. We provide you with information about third-party travel suppliers’ offers, and link you to their sites. The information posted by The Flight Deal is valid at the time of publication. However, we have no control over the suppliers, and we therefore do not warrant or guarantee that their offers will not change or become unavailable. Nor are we responsible for their products, services or site content. Please see their sites for their most up-to-date offer information and all applicable terms and conditions.