JetBlue, Spirit Wrap Court Push for Merger Before Judge Decides

JetBlue Airways Corp. and Spirit Airlines Inc. are wrapping up testimony at an antitrust trial over their proposed $3.8 billion merger, a deal US regulators want to block as part of a crack down on industry consolidation.

Over more than a week, the airlines presented evidence from experts and executives to support their claim that combining the low-cost carriers would allow them to better compete with major airlines and provide better service for customers. Closing arguments for both sides are slated for Tuesday in Boston.

The US Justice Department spent about three weeks presenting evidence earlier in the trial seeking ...