19 Airlines Most Likely to Cancel Your Flight (And How to Avoid Them)

16. TAP Air Portugal – Tight Schedules and Transit Chaos

TAP’s aggressive scheduling through Lisbon—a hub notorious for congestion—makes it especially vulnerable to delays and cancellations. A short layover window paired with high traffic volume often snowballs into missed connections or last-minute scrapped flights. Add frequent strikes across the EU, and reliability starts to dip. If you’re flying TAP, avoid connecting itineraries under two hours and check the strike calendar before booking. Opting for nonstop options (where available) and using the TAP app for real-time updates can save you from a mid-trip scramble.