Which is the best, American Airlines, Delta, or United?

Airlines Routes/ Destination:

Airlines Extra service fees:

• Checked luggage fee: Passengers flying with American Airlines may be required to pay a $35 checked luggage fee if they pay online, but at the Airport, they need to pay $40 for the first checked luggage on domestic routes unless they hold an elite status or are eligible for a credit card.
• Seat Selection Charges: All American Airlines fares generally offer complimentary seat selection except the Standard Economy Class. Passengers flying in basic Economy can purchase a seat by paying an average fee of $23 after booking. Otherwise, the charges may vary based on the travel distance, time of booking, and so on.
• Change Fees: American Airlines has removed the change fee for all fare types, so travelers can update their booked flight tickets for free. However, like several other Airlines, American Airlines Basic Economy fares are non-changeable except for flights operating within Europe, which you can change for free.

• Checked Luggage Fee: Travelers flying on domestic flights with Delta Airlines may be required to pay the first checked luggage fee of $35, which may vary based on the travel destination, fare types, and more. However, passengers with elite status, eligible credit cards, or active military status can avoid these additional charges.

• Seat Selection Charges: To avoid random seat assignment, passengers must pay seat selection charges of an average of $28 for the desired seat, especially on Standard Economy Fare; however, all other fare types allow complimentary seat selection. 

• Change Fees: Delta Airlines eliminates change fees for flights serving destinations like the United States, Canada, Europe, Africa, and the Caribbean. While, like other Airlines, Basic Economy Fares are non-changeable, if you need to update any changes in Basic Economy, you might be required to cancel the booking and rebook it.

• Checked Luggage Fee: Passengers flying in Economy class may be required to pay the checked luggage charges, which start from $35 to $40 if they pay before 24 hours of departure. Otherwise, travelers who have purchased the other fare types might not be required to pay an additional baggage fee. 

• Seat Selection charges: United Airlines essential Economy fare holders are required to purchase a seat, and if they need to change their seat, they should pay the charges, subject to various factors. Therefore, the Airline charges an average fee of $30 to select the desired seat, although other fare types offer free seat selection. 

Airlines Economy Class services:

Which is the best Airline among all three?