473 articles
Red-eye flight
A red-eye flight is an overnight airline flight departing late at night and arriving early the next morning, named for the tired eyes of sleepless passengers.
Republic Airways
Republic Airways, also known as Republic Airline, is a large American regional airline based in Carmel, Indiana, flying Embraer jets as American Eagle, Delta Connection, and United Express.
Revenue management
Revenue management is the use of forecasting and optimization to sell a fixed, perishable inventory, like airline seats, at differentiated prices, aiming to sell the right seat to the right customer at the right price.
Revenue per available seat mile
Revenue per available seat mile (RASM, or unit revenue) is an airline performance measure equal to operating revenue divided by available seat miles, capacity offered whether or not it is sold.
Riyadh Air (طيران الرياض)
Riyadh Air (طيران الرياض) is Saudi Arabia's new national airline, wholly owned by the Public Investment Fund, which began flying from Riyadh to London in 2026.
Rome Ciampino Airport
Rome Ciampino Airport (Giovan Battista Pastine, IATA CIA), Rome's second airport after Fiumicino, opened 1916 as an airship base; now serves low-cost flights, cargo, general aviation, and the Italian Air Force's 31° Stormo, with a 23:00-06:00 night curfew.
Rossiya Airlines
Rossiya Airlines (Авиакомпания «Россия») is a Russian full-service airline based in Saint Petersburg and owned by the Aeroflot Group, carrying 12 million passengers in 2025.
Royal Air Maroc (الخطوط الملكية المغربية)
Royal Air Maroc (الخطوط الملكية المغربية) is the state-owned flag carrier of Morocco, founded in 1957 and headquartered in Casablanca, serving over 100 destinations and a oneworld member since 2020.
Royal Brunei Airlines
Royal Brunei Airlines (Penerbangan DiRaja Brunei) is the flag carrier of Brunei, founded in 1974 and wholly owned by the government, flying from Bandar Seri Begawan across Asia, the Middle East, Australia, and the United Kingdom.
Royal Jordanian (الملكية الأردنية)
Royal Jordanian Airlines (الملكية الأردنية) is Jordan's national flag carrier, established by King Hussein in 1963, flying from its hub at Queen Alia International Airport in Amman.
RwandAir
RwandAir, formerly RwandAir Express, is the government-owned flag carrier of Rwanda, based at Kigali International Airport and flying across Africa, the Middle East, Europe, and Asia.
Ryanair
Ryanair is an Irish low-cost airline headquartered in Dublin, founded in 1984, that pioneered low-cost flying in Europe and has been Europe's largest passenger airline since 2008.
Sabena
Sabena was the national airline of Belgium, founded in 1923 and operating a pioneering network to Africa before going bankrupt in 2001, one of the world's oldest airlines.
Sabre Corporation
Sabre Corporation is an American travel technology company headquartered in Southlake, Texas, that operates one of the three dominant global distribution systems for airline bookings and sells software to airlines.
Samoa Airways
Samoa Airways, formerly Polynesian Airlines, is the state-owned flag carrier of Samoa, headquartered in Apia. Created in 2017, it ended international jet services in 2022 and now flies regional routes.
Saudia (الخطوط الجوية السعودية)
Saudia, legally the Saudi Arabian Airlines Corporation, is the state-owned flag carrier of Saudi Arabia. Founded in 1945, it flies to about 100 destinations and joined SkyTeam in 2012.
Scandinavian Airlines
Scandinavian Airlines (SAS) is the flag-carrier airline group of Denmark, Norway, and Sweden, formed in 1946, flying from hubs in Copenhagen, Oslo, and Stockholm to destinations in Europe and overseas.
Scoot
Scoot, also known as Scoot Pte Ltd, is a Singapore low-cost airline wholly owned by Singapore Airlines, founded in 2011 and flying from Changi Airport across Asia-Pacific and beyond.
Scope clause
A scope clause is a provision in a major US airline's pilot union contract limiting regional carriers' flying, typically capping regional jet seats at 50 to 76.
Secondary surveillance radar
Secondary surveillance radar (SSR) is an air traffic control system that interrogates aircraft transponders on 1030 MHz and receives replies on 1090 MHz, providing identity and altitude.
Shankh Air
Shankh Air is a proposed Indian regional airline based in Uttar Pradesh that received a civil aviation ministry No Objection Certificate in 2024 but had not begun flying as of mid-2026.
Shanwick Oceanic Control
Shanwick Oceanic Control, known as Shanwick, is the air traffic control service for the northeastern North Atlantic, combining Shannon radio communications with control from Prestwick, Scotland.
SIA Engineering Company
SIA Engineering Company is a Singapore-based provider of aircraft maintenance, repair, and overhaul services, majority owned by Singapore Airlines and serving more than 80 international airlines.
SilkAir
SilkAir was a Singapore-based full-service regional airline serving secondary destinations across Asia Pacific from Changi Airport as the regional wing of Singapore Airlines until its full integration in 2021.
Silver Airways
Silver Airways was a regional airline based in Hollywood, Florida, that flew within Florida and to the Bahamas and the Caribbean from 2011 until ceasing operations in June 2025.
Simplifly Deccan
Simplifly Deccan was the name of India's first low-cost airline, Air Deccan, after its 2007 acquisition by Vijay Mallya's UB Group, lasting until it was renamed Kingfisher Red on 29 August 2008.
Singapore Airlines
Singapore Airlines (SIA) is the flag carrier of Singapore, incorporated in 1972 when Malaysia-Singapore Airlines split, and named world's best airline at the 2026 Skytrax awards.
Singapore Airlines fleet
The Singapore Airlines fleet is the set of passenger and freighter aircraft flown by Singapore's flag carrier, with 145 passenger aircraft and one of the youngest fleets among major full-service carriers.
Single European Sky
The Single European Sky (SES) is a European Union initiative, launched in 2004, to replace fragmented national airspaces with a harmonized, performance-driven air traffic management system.
Skyguide
Skyguide is the Swiss air navigation service provider, almost entirely owned by the Swiss Confederation, managing civil and military air traffic over Switzerland from control centers in Geneva and Zurich.