Traveller reference · DL
Delta Air Lines
SkyTeam · IATA DL · Atlanta anchors the largest hub in the world
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This page is a general reference written by our team. Baggage allowances, fees and policies are set by the airline and change without notice, so confirm anything that affects your trip with Delta Air Lines directly before you travel.
Official site: delta.comDelta runs the busiest single hub anywhere at Atlanta, and connects through Detroit, Minneapolis, Salt Lake City and several coastal gateways besides. For most travellers that means a high chance of a connection, and an unusually high chance it works, because the airline has built its reputation on operational reliability more than on price.
Delta's cabin structure is more granular than most US carriers, running from Basic Economy through Main Cabin, Comfort+, Premium Select and Delta One. The names sit close together on a results page but describe genuinely different products, and knowing which is a seat upgrade and which is a separate cabin avoids paying for the wrong thing.
Delta Air Lines at a glance
- IATA code
- DL
- ICAO code
- DAL
- Based in
- United States
- Alliance
- SkyTeam
- Type
- Full-service
- Frequent flyer
- SkyMiles
How Delta Air Lines baggage works
Delta's allowance follows cabin and fare tier, with SkyMiles status and co-branded cards layering additional entitlements on top. Basic Economy is the tier to watch, because its restrictions extend beyond baggage into seat assignment and changes.
Long-haul international itineraries are generally counted in pieces with a weight ceiling per bag, while domestic tickets typically include a carry-on and personal item with checked bags priced separately. Partner-operated segments on a Delta ticket can follow the operating carrier's rules instead, which catches people out on connecting itineraries.
Check the allowance against your own booking on delta.com, particularly if any leg is flown by a partner rather than by Delta itself.
Check-in
Online check-in usually opens 24 hours before departure. The Fly Delta app handles it, holds the boarding pass and tends to surface gate changes faster than the airport screens do.
Airport cutoffs vary by airport and are earlier for international departures. Bag drop closes before the desk, so treat that as the deadline if you are checking anything.
Boarding
Delta boards by named zones rather than numbers, running from pre-boarding and the premium cabins through the status tiers to Basic Economy at the end.
As with any zone system, the real cost of a late zone is overhead space. If you are boarding last with a full carry-on on a busy flight, plan for the possibility that it goes into the hold at the gate.
Before you fly Delta Air Lines
Comfort+ and Premium Select are different things
Comfort+ is extra legroom within the main cabin. Premium Select is a separate long-haul cabin with a different seat and service. The names suggest a smaller gap than there is.
Atlanta is large but linear
Concourses run in a line connected by an underground train, so connections are usually predictable even when the walk is long. Allow more time if you are changing between the international concourse and a domestic one.
Check who actually operates each leg
A Delta ticket can include segments flown by SkyTeam partners or regional operators, and baggage rules, seat products and check-in can follow the operating carrier rather than Delta.
Planning a trip rather than researching a carrier?
Our route and airport guides cover the journey itself — when demand peaks, which airports work, and how long the connection really takes.
FAQ
Delta Air Lines — common questions
General guidance only. Delta Air Lines sets these policies and can change them, so confirm anything that affects your trip at delta.com.
What is Delta Comfort+?
It is an extra-legroom section within the main cabin, with earlier boarding and usually a dedicated overhead area, rather than a separate class of service. On long-haul aircraft the distinct premium cabin is Premium Select, which has a different seat entirely. If you are choosing between them, you are choosing between more room in economy and a different cabin altogether.
When does Delta check-in open?
Generally 24 hours before departure, through delta.com or the Fly Delta app. Airport and bag-drop cutoffs differ by airport and are earlier for international flights, so confirm those for your specific departure rather than assuming they carry over from a previous trip.
Does Delta Basic Economy include a carry-on?
Delta's Basic Economy has historically been less restrictive on carry-on than some competitors, but the tier's rules on seat selection, changes and boarding order are meaningfully tighter than standard Main Cabin. Because these terms have been revised more than once, confirm the current conditions on delta.com for your route before booking rather than relying on what applied previously.