Lost luggage. 54% of people said it would equal a "vacation disaster."
No internet, 49%.
Food poisoning, 47%.
Bad weather your entire trip, 47%.
A lost or stolen credit card, 44%.
Ending up in a bad or unsafe location, 43%.
A lost passport or I.D., 40%.
Coming down with a cold or the flu, 40%.
No air conditioning, 38%.
The plumbing breaks, also 38%. Lost reservations, missing a flight, and bad traffic all tied for 11th place.