Despite pressure to cut costs and an activist investor campaign, Southwest reported a healthy profit for the fourth quarter.

The Denver-based low-cost carrier said its combination with the Dania Beach, Florida-based Spirit would create a stronger low-cost carrier and benefit “from the very significant synergies Frontier expects to achieve by combining the airlines’ operations.”

Denver-based Frontier Airlines says it’s ready to keep talking after bankrupt Spirit Airlines rejected its offer to merge.

Discount carrier says a merger would be a better path out of bankruptcy for Spirit, which has rebuffed the latest proposal.

The Potomac plane crash has had a cascading effect that will send ripples through the airline industry for days, if not longer. Here is everything to know.

Rather than accept Frontier’s offer, Spirit said it will stick to its current plan to emerge from Chapter 11 bankruptcy.

Frontier Airlines is attempting for a second time to merge with the now bankrupt Spirit Airlines, which declared bankruptcy late last year as budget airlines struggle.

Frontier Airlines is again pursuing a merger with Spirit Airlines, with Spirit mired in chapter 11 bankruptcy proceedings.

The Appeals Court ruled that while the DOT had the power to issue such rules, the rulemaking process had some procedural gaps.

New flights have been added for Kansas City and Philly fans, with one airline adding flights on a route it doesn't normally serve.

American Airlines, Frontier Airlines, Southwest Airlines, United Airlines and Delta Air Lines have added a combined 31 new nonstop flights between Philadelphia International Airport (PHL ...