Air Canada

Portland PDX to London $487-$556 all alliances

All Alliances Boston $328-$395 to Spain or Geneva Jan-June

United/Star Alliance Philadelphia to Venice $386, Milan, Florence, Naples $380-$460 Mar-May, Aug-Oct

United Paris to LAX/LAS/SFO $431-$455 Feb 28-Mar 30

Icelandair/AA/DL/UA $387-$457 Seattle to Brussels, Copenhagen, Stockholm and more

Phoenix to Barcelona or Madrid United $508-$568 Jan-April

LAX/SFO to Barcelona $433-$513 Star Alliance/Oneworld Jan-May

Fare Alert Boston to Copenhagen $265-$335 Air Canada, London $416-480 United/Delta all summer

a screenshot of a flight schedule

Fare War $343-$444 Boston to Barcelona, Madrid and around Spain Jan-May

a screenshot of a flight schedule

Portland PDX to London United $555, Amsterdam UA $580, Delta $571 Dec-May

BoardingArea