The Points Guy website is out with its annual ranking of US airlines, and Delta comes out on top by a rather comfortable margin. The top-10 ranking takes into account all the factors you'd expect—on-time flights, cancellations, general reliability, cost, scheduling, frequent-flier perks, and more. Here are the rankings, plus a few odds and ends from the stats: 
 -  Delta Air Lines, total score of 70.4 out of 100
-  Southwest Airlines, 61
-  United Airlines, 60.5
-  American Airlines, 58.5
-  Alaska Airlines, 58.0
-  Hawaiian Airlines, 57.4
-  JetBlue Airways, 49.5
-  Frontier Airlines, 35.9
-  Allegiant Air, 33.2
-  Spirit Airlines, 30.9
 
                            
                            
                            
                            
                            
                                
                                
                                    
                                        Other notable stats: 
 -  Hawaiian Airlines is the best for reliability (think delays and cancellations), while Allegiant is the worst.
-  American Airlines is the worst for checked baggage.
-  JetBlue is best for travel experience, meaning things such as seat comfort, amenities, and WiFi.
-  Delta had the best score on traveler complaints, with just 1.25 per 100,000 passengers; Spirit came in last with 12 per 100,000.
 See the 
complete rankings and breakdowns. (Or check out 
other lists.)