Travel experts have warned that summer flight prices are likely to continue increasing, and booking sooner may help travelers avoid further increases. This comes as conflict in the Middle East increases global oil supply and gas and diesel fuel prices, leading to increased airfare. College students who often travel for internships, study abroad, or home trips are finding it harder or impossible to afford. United Airlines CEO Scott Kirby warned that fuel prices are increasing and fares may need to rise by around 20%. Thrifty Traveler Editor Kyle Potter suggested that booking sooner rather than later could help lower costs.