Travellers waited in long lines at Beirut airport yesterday, some after cutting summer holidays short, as airlines have cancelled flights and fears have grown of all-out war between Israel and Hezbollah.“I’m not happy to leave. I wanted to spend the whole summer in Lebanon then go back to work” in France, said Joelle Sfeir from the crowded departures hall at Beirut airport.But “my flight was cancelled and I was forced to book another ticket today,” she told AFP.“I cut my trip short so I could find a flight,” she added.Lebanon’s Iran-backed Hezbollah movement has traded near-daily fire with Israeli forces in support of ally Palestinian resistance movement Hamas since October 7.But the killing Wednesday of Hamas political leader Ismail Haniyeh in Tehran, hours after the Israeli assassination in Beirut of Hezbollah’s military chief Fuad Shukr, has sparked vows of vengeance from Iran and other Tehran-backed armed groups, including Hezbollah, and sent regional tensions skyrocketing.Several airlines including Lufthansa and Air France have delayed or suspended flights to Lebanon, and countries have issued urgent calls for foreign nationals to leave in recent days.France did so yesterday, warning of “a highly volatile” situation, while the US embassy in Lebanon a day earlier urged its citizens to leave on “any ticket available”.Fears have spiked that months of cross-border violence could degenerate into all-out conflict between Hezbollah and Israel, who last fought a devastating war in the summer of 2006.Israel bombed Lebanon’s only passenger airport in Beirut during that war.Embassies have repeatedly urged their citizens to leave Lebanon while commercial flights are still available.In the departures hall, families sat on metal seats, children lying in their parents’ laps, while passengers watched over piles of bags and checked television screens for flight departures for locations including Istanbul, Amman and Cairo.The tensions and cancellations have thrown travel plans into chaos for many Lebanese who work or study abroad and who usually use their annual summer holiday to visit relatives and friends back home.