Delta and AA both have been very high since they took the 737's out of commission. a large number of the 737 MAX in their fleet
Delta did not have any of the 737 MAX in their fleet. AA did and that has greatly impacted schedules along with prices. Supposedly it was only 2% of their flights impacted but it sure seems to have had a dramatic effect on schedules.
Southwest had a large number of the 737 MAX in their fleet.
Any other 737 (737-700, 737-800, etc.) was not at all impacted by the grounding of the 737 MAX.
