Based on the number of routes, on-time record and the availability of airport lounges, Delta was named the best airline of 2019 by The Points Guy.

Alaska and Southwest were ranked in the top three.

Factors determining the best airline in this survey included customer satisfaction, comfort, and pricing.

United and Hawaiian Airlines round out the top five best carriers.

Source: https://www.forbes.com/sites/alexandratalty/2019/03/19/delta-named-best-airline-in-2019/