Heathrow's Third Runway Wins Backing of Parliament—But Not British Airways

London Heathrow airport’s 16 billion-pound ($21 billion) expansion plan may have cleared its last major political hurdle, but the project has yet to convince British Airways, the hub’s biggest customer. After U.K. lawmakers backed the construction of a third runway by 415 votes to 119 late Monday, BA owner IAG SA responded by saying that the financing arrangements proposed by Heathrow are likely to increase user charges and effectively require present-day passengers to fund future flights. “Parliament has approved Heathrow’s expansion without any idea of how much it will cost,” IAG Chief Executive Officer Willie Walsh said in a statement.