Delta Air Lines is one of the three biggest carriers in the US and a top choice if you're looking for a domestic flight within the country. The airline has a regional subsidiary brand, Delta Connection, that it uses for most of its domestic flights. Delta Connection flies to more than 200 destinations across the US, covering every state (excluding Hawaii and Alaska). Most destinations that aren't covered by Delta Connection are covered by the mainline Delta, including destinations within Alaska and Hawaii. Altogether, Delta is a great choice for domestic flights due to the sheer number of domestic destinations that it covers and the different domestic flight options available.

Delta has 10 domestic hubs in 9 states and offers many point-to-point flights between destinations outside of these hubs.

Delta Connection is actually made up of three different airlines that you may or may not have heard of — Endeavor Air, Republic Airways and SkyWest Airlines. But, as a passenger, that's not important. All Delta Connection flights are operated under the Delta brand and name and all flights adhere to Delta's standards. This means that you won't be able to tell which airline is operating your flight anyway and you'll always have the same great Delta experience.

Basic Economy

Basic Economy is Delta's most simple and cheapest cabin class. It's perfect if you're just looking to get from one destination to another, without any extras.

In Basic Economy, you're given a pre-assigned seat, with standard legroom, as well a complimentary drinks throughout the flight. If you want to order food, you can from the airline's in-flight menu at an extra cost.

On select flights, there's a 9" screen installed on the back of each seat for you to enjoy the airline's in-flight entertainment on. On flights where there's no built-in in-flight entertainment system, you're able to connect your own personal device to the Delta Studio and watch/listen to entertainment through your device.

Main Cabin

The Main Cabin is the next step up from Basic Economy. It offers all the same things as Basic Economy (seat size, in-flight entertainment etc), however, the main difference in the Main Cabin is that you're able to assign yourself prior to check-in.

Delta Comfort+

Delta Comfort+ is the name for Delta's Business Class. It's available on select domestic flights and offers the next level of luxury up from Basic Economy and Main Cabin.

Seats in Delta Comfort+ are larger than Basic Economy/Main Cabin and give up to 50% more recline and up to 4" more legroom. You can pre-assign your seat and are given a dedicated overhead bin space so that your carry-on baggage is nearby for the entire flight.

On select domestic flights, you're given complimentary premium snacks or a meal (depending on the flight) as well as complimentary alcoholic and non-alcoholic drinks.

On Delta Comfort+ domestic flights, you're given access to Delta's in-flight entertainment system, which is available through the 9" screen installed on the seat-back in front of you.

On Delta Comfort+ you're also given SkyPriority boarding, meaning that you'll board before those in Basic Economy/Main Cabin.

First Class

First Class is the most luxurious cabin on Delta domestic flights. It gives you the highest standard of service that the airline has to offer, with all the add-ons.

First Class seats give up to 50% more recline and up to 8" more legroom than those in Basic Economy/Main Cabin. You're given your own overhead bin space, can pre-select your seat prior to check-in and are given a pillow.

Flying in First Class means that you're treated to a fine dining experience once in-flight, with a menu that differs depending on the flight time. On top of the exclusive meal service, you can also order complimentary snacks and drinks throughout the price, with both alcoholic and non-alcoholic options.

The First Class experience is totally personalised, with flight attendants dedicated to First Class only.

There's in-flight entertainment on all domestic First Class flights, with Delta Studio installed on a seat-back screen that is up to 11" wide. The in-flight entertainment comes accompanied with a complimentary headset.

First Class also gives you priority boarding ahead of all other cabin classes, meaning that you're the first to board and the first to disembark. As a First Class passenger, you'll also have access to expedited baggage handling and security lanes.

Carry-On

For all Delta domestic flights, you're given one free carry-on bag and one free personal item. Your carry-on bag has no weight restriction but must fit within the dimensions of 22" x 14" x 9" (56 cm x 35 cm x 23 cm). Your personal item must be a small backpack, purse, laptop and bag or something of a similar size.

Checked

There's no free checked baggage allowance on Delta domestic flights if you're flying in Basic Economy, Main Cabin or Delta Comfort+. If you want baggage and you're flying in these cabins, you must purchase it either prior to your flight or at check-in. Although, baggage at check-in is much more expensive than pre-booking.

If you're flying in First Class, you're given a free baggage allowance that allows you to bring two checked bags, each weighing no more than 32 kg each. This baggage must fit the linear dimensions of 62" (158 cm).