Airline Route Maps & Flights

Star Alliance is the largest: 26 member airlines serving more than 1,150 airports in 190 countries. SkyTeam has 18 members flying to 945 destinations in 145 countries, and oneworld has 15 members flying to more than 900 destinations. The biggest network is not always the best fit, though: pick the alliance whose members fly from your home airport, because that is where you will earn and use status.

For short flights with hand luggage only, usually yes: Ryanair, AirAsia, IndiGo, Wizz Air and Jet2 often undercut full-service fares even after paying for a seat and a small bag. For long-haul or family travel with checked bags, the gap closes fast. Spirit, Frontier, Allegiant, Norse Atlantic and Scoot can look cheapest on the headline fare, but checked bags and seat selection cost extra on each flight. Add up the fees for your own bags before you compare.

Icelandair lets you stop over in Iceland on the way across the Atlantic without paying more for the flights, and Turkish Airlines (Stopover in Istanbul) and Qatar Airways (stopover packages in Doha) offer hotel deals when you break your journey at their hubs. Some airports run their own free tours for transit passengers: Singapore Changi Airport has a free Singapore tour and Seoul Incheon Airport has transit tours. Terms, eligibility and minimum layover times change often, so check the airline or airport page before you book.

A codeshare is one airline selling seats on another airline's flight under its own flight number — your ticket says BA1700, but the metal is operated by Iberia. An interline is a baggage / through-checking agreement without selling each other's seats — useful when you're booking two separate tickets and need bags through-checked. Codeshare matters when you're using miles or chasing alliance status; interline matters when you're flying separate tickets and want luggage handled.

Smaller and low-cost carriers (Breeze Airways, Avelo and Allegiant in the US; PAL Express and AirAsia in Asia; Volotea in Europe) make sense for city pairs the majors do not fly nonstop, where the alternative is a connection through a hub. Check the baggage rules first (cabin bags are often weighed) and remember that disruption recovery is weaker: a smaller fleet means fewer alternative flights. For multi-leg journeys, a major airline on one ticket is the safer choice.