British Airways have round trip airfares travelling from Seattle (SEA) to Inverness Scotland (INV) for $356, making 1 stop in London.
Travel Availability:
Departs SEA: April 2, 23, 25; May 5, 7
Returns: April 9, 10, 11, 15, 23, 24, 25, 26, 28, 30; May 1-5, 7-9, 12, 14-15, 20, 23
Enter travel dates on Expedia and select your fares to book this deal. Bundling hotel with airfare will save money and Expedia can also sell you attraction and sightseeing tour tickets in their "things to do" section.
Inverness Scotland Travel Guide
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http://www.expedia.com/