British Airways via Expedia have round trip airfares travelling from Seattle (SEA) to Basel Switzerland (BSL) for $455, making 1 stop in London both ways. These are basic economy fares where you are allowed a personal item and a carry-on bag.
Travel Availability:
Departs SEA: Oct 28-30; Nov 4-6, 11-13, 18-20, 25-27; Dec 2-4, 9-11; Jan 1, 6-8, 13-15, 20-22, 27-29; Feb 3-5, 10-11, 17-19, 24-26; March 3-5
Returns: Nov 4-7, 11-13, 18-21, 25-28; Dec 2-5, 10-11, 16-18, 24-25; Jan 9-10, 13-17, 20-24, 27-31; Feb 3-7, 10-13, 17-21, 24-28; March 3-7, 10-14
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