In 2026, the question of whether Air Traffic Control (ATC) issues constitute an "extraordinary circumstance" for flight compensation (under UK261 or EC261/2004) remains a critical point for travelers. Generally, ATC restrictions, such as "flow control" due to congestion or unexpected strikes by national ATC providers (like NATS in the UK or DSNA in France), are considered extraordinary circumstances. Because these events are beyond the airline's control and couldn't have been avoided even if all reasonable measures had been taken, the airline is usually exempt from paying "fixed compensation" (the £220–£520 payouts). However, if the ATC delay was caused by the airline's own scheduling failures or if they cannot prove the specific ATC instruction led directly to your delay, you may still have a claim. Regardless of the cause, the airline always owes you a "Duty of Care," which includes providing vouchers for meals, communication, and hotel accommodation if you are delayed overnight. Never let an airline use the "ATC" excuse to deny you basic necessities while you are stuck at the airport.