Originally Posted by MainlineFlyer

Operating Margin Comparison

Spirit Airlines (Full-year Operating Margin):

2017: ~14.9%

2018: ~8.4%

2019: ~13.7%


Delta Air Lines (Full-year Operating Margin):

2017: ~13.4%

2018: ~11.6%

2019: ~13.2%


Summary:

In 2017, Spirit held a slight edge over Delta (~14.9% vs. ~13.4%).

2018 was a weaker year for Spirit, whose operating margin dipped (~8.4%) well below Delta’s (~11.6%).

2019 saw Spirit rebound to ~13.7%, slightly outperforming Delta’s ~13.2%.