This launch could get passengers a cheaper way back home. Rescue is on its way. After the sudden collapse of Spirit Airlines, JetBlue is offering to pick up the pieces, at a price. The major airline is offering to assist travelers who had planned trips with Spirit Airlines at a $99 rescue fare.

JetBlue Airways is adding flights at Spirit Airlines’ former home airport as it tries to turn a profit again.

Losing the airline dealt a sharp blow to the airport, stripping away a key link to the broader travel network and delivering an unexpected ripple through a community still defined by its most famous s...