Delta Airlines provide economy class cabins to the customers at very low fare. Economy class includes both delta basic economy and delta main cabin seats in the same class. The basic difference of basic economy and main cabin is the comfort, seat selection, seat upgrade, etc. Let's compare the differences in between basic economy vs main cabin below:

1. You can not select your seat in basic economy class until check-in, but in the main cabin, you can select your seat before check-in.

2. Seats in basic economy class are less flexible as compare to main cabin seats. To book main cabin seats you have to pay extra as compare to basic economy class.

3. Seat upgrades or flight changes are not allowed in basic economy class flights after a 24-hour flight booking period. However, you can do flight changes or seat upgrades in the main cabin.

4. Although the checked baggage cost is the same for both in some flights one checked baggage cost includes in-flight fare for the main cabin.

5. If you are flying with your companion then you may not be able to sit with them in basic economy class. However, as you can select your seat in the main cabin then you can get your companion's seat assigned with you.