Delta Airlines, often known simply as Delta, is a prominent American airline company headquartered in Atlanta, Georgia. Established in 1924, it has a rich history and is one of the world's largest and oldest operating airlines.

Key Points about Delta Airlines:

1. History: Delta Airlines was founded in 1924 as a crop-dusting company. Over the years, it evolved into a major passenger airline, changing its name to Delta Air Lines in 1929.

2. Hubs: Delta has several hub airports, with Hartsfield-Jackson Atlanta International Airport being the largest and busiest. Other significant hubs include Minneapolis-Saint Paul International Airport, Detroit Metropolitan Wayne County Airport, and Salt Lake City International Airport.

3. Fleet: Delta operates a diverse fleet of aircraft, including Boeing and Airbus models. This allows them to serve a wide range of domestic and international routes.

4. Destinations: Delta Airlines serves numerous destinations across North America, South America, Europe, Asia, Africa, and the Caribbean. Its extensive route network makes it a global carrier.

5. Alliances and Partnerships: Delta is a founding member of the SkyTeam alliance, collaborating with other major international airlines. It also has strategic partnerships with carriers like Virgin Atlantic, Korean Air, and WestJet.

6. Frequent Flyer Program: Delta operates the SkyMiles loyalty program. Passengers can earn miles when flying with Delta or its partners, which can be redeemed for free flights, upgrades, and other rewards.

7. Services: Delta offers a range of services to enhance the travel experience, including online booking, check-in options, baggage services, in-flight entertainment, Wi-Fi, dining and refreshments, comfortable seating options, and airport lounges.

8. Environmental Initiatives: Delta has made efforts to reduce its environmental impact by investing in more fuel-efficient aircraft and implementing sustainability programs.

9. Customer Satisfaction: The company places a strong emphasis on customer service and has received awards for its efforts in this regard.

10. Corporate Social Responsibility: Delta is involved in various philanthropic activities and community initiatives, including disaster relief efforts and supporting education and healthcare programs.

Please note that the information provided is based on my last knowledge update in September 2021, and there may have been developments or changes since then.

1. Flight Booking: Delta provides an easy-to-use website and mobile app for booking flights. Customers can also book tickets through travel agencies and Delta's customer service centers.

2. Check-In Options: Passengers can check in for their flights online, through the mobile app, or at the airport check-in counters. Delta also offers self-service kiosks at many airports for a convenient check-in process.

3. Baggage Services: Delta offers baggage check services, and passengers can choose from different baggage options depending on their needs. They also provide baggage tracking to help passengers locate their luggage if it is delayed or lost.

4. In-Flight Entertainment: Delta offers a wide range of entertainment options on its flights, including movies, TV shows, music, and games. Passengers can enjoy this content on seatback screens or through the Delta Studio entertainment system on their personal devices.

5. Wi-Fi: Delta provides Wi-Fi on most of its flights, allowing passengers to stay connected during their journey. They offer different Wi-Fi packages for various needs, including browsing, streaming, and messaging.

6. Dining and Refreshments: Delta offers complimentary snacks and non-alcoholic beverages on most flights. On longer flights, passengers can enjoy a meal service, and Delta also provides special meal options for passengers with dietary restrictions. Alcoholic beverages are available for purchase.

7. Comfort and Seating: Delta offers various seating options, including standard economy, Delta Comfort+, and First Class. Passengers can choose seats that suit their comfort preferences and budget. Delta also offers blankets and pillows on longer flights.