Delta Airlines' baggage policy allows passengers to bring one carry-on bag and one personal item for free. The carry-on bag must not exceed 22 x 14 x 9 inches in size, while the personal item should fit under the seat in front of you. For checked baggage, the policy varies depending on the fare type and destination. Passengers can check the specific baggage allowance for their flight on Delta's website or by contacting the airline directly. Additional fees may apply for excess or oversized baggage. **

Urban design is more closely related to city planning than urban development. City planning focuses on the organization and development of urban areas, including land use, infrastructure, and public spaces, which are all key components of urban design. Urban development, on the other hand, typically refers to the physical construction and economic growth within urban areas, which is influenced by urban design and city planning decisions. Therefore, while urban design is related to both city planning and urban development, it is more aligned with the principles and goals of city planning. **

Many airlines have different policies regarding hand luggage flexibility. Some airlines may have strict rules on the size and weight of hand luggage, while others may be more lenient. It is important for passengers to check the specific hand luggage policy of the airline they are flying with to avoid any issues at the airport. Some airlines may also offer the option to purchase additional hand luggage allowance if needed. **

United Airlines' policy for excess baggage varies depending on the route and class of service. For domestic flights within the United States, the fee for the first and second checked bag is $35 each, and the fee for any additional bags is $150 each. For international flights, the fees for excess baggage also vary based on the destination and class of service. It is recommended to check United Airlines' website or contact their customer service for specific details on excess baggage fees for a particular flight. **

Not all airlines become budget airlines like Ryanair because there are different market segments within the airline industry. Some airlines choose to focus on providing premium services and amenities to attract high-paying customers, while others target budget-conscious travelers. Additionally, the business model of budget airlines, which relies on high aircraft utilization, point-to-point routes, and ancillary revenue, may not be suitable for all airlines. Furthermore, some airlines may have established brand identities and customer bases that are not aligned with the budget airline model. **

Corendon Airlines Europe's free baggage allowance policy varies depending on the ticket type. For Economy Class tickets, passengers are allowed one piece of checked baggage weighing up to 20kg. For Comfort Class tickets, passengers are allowed two pieces of checked baggage, each weighing up to 20kg. Additionally, passengers are allowed one piece of carry-on baggage weighing up to 8kg. It's important to check the specific baggage allowance for your ticket type before traveling. **

Small airlines are typically regional or low-cost carriers that operate with a smaller fleet of aircraft and offer limited routes compared to major airlines. They often focus on serving specific regions or niche markets, providing more personalized service and often lower prices. Small airlines may not have as extensive a network or as many amenities as larger airlines, but they can offer a more intimate and efficient travel experience for passengers. **

All major airlines prioritize safety as their top priority, so it is generally safe to fly with reputable carriers such as Delta, American Airlines, United, Lufthansa, Emirates, and Singapore Airlines. These airlines have strong safety records, well-maintained aircraft, and experienced pilots. It is always recommended to check the safety ratings and reviews of any airline before booking a flight. **