Flight attendants spend their workweek sealed inside flying petri dishes - recycled air, surfaces nobody cleans, hundreds of strangers coughing into a shared cabin. And somehow, most of them almost never call in sick.

The rest of us? We take one round-trip and come home hacking for a week.

Getting sick on a trip isn’t just miserable. It’s expensive. Urgent care visits run $150 to $200 out of pocket. Hotel extensions, rebooking fees, and lost prepaid tours pile on fast. A single bad cold can torch a four-figure vacation.

So before your next flight, steal these nine habits from the people who fly for a living.

1. Drink water like it’s your job

The air at 35,000 feet is desert-dry. Cabin humidity typically runs between 10% and 20%, compared to 40% to 50% in most buildings. Dehydration weakens your immune response. The Aerospace Medical Association recommends you drink 8 ounces of water per hour while flying.

2. Skip the airplane coffee and tea

The water in onboard tanks isn’t pristine. A 2025 study by the Center for Food as Medicine and Longevity found many U.S. carriers provided water violating federal safety standards. Coffee and tea are made from that same tank water - drink bottled water.

3. Wipe down your seat the second you sit down

A Travelmath study found tray tables average about 2,155 colony-forming units of bacteria per square inch - more than eight times the bacteria found on lavatory flush buttons. Pack disinfecting wipes and hit the tray table, armrests, seatbelt buckle, and air vent dial.

4. Don’t eat directly off the tray table

Even after you wipe it, a wipe doesn’t sterilize. Put your food on a napkin or wrapper.

5. Keep your hands off your face

Most viruses enter through your eyes, nose, or mouth via your fingers. The CDC calls hand hygiene one of the most important things you can do to avoid getting sick.

6. Sleep hard the night before you fly

Research from UC San Francisco found people getting six hours of sleep or less were four times more likely to catch a cold than those getting more than seven hours. Sleep is the single biggest variable in immune defense.

7. Wear a mask during boarding and deplaning

Cabin air is refreshed 20 to 30 times per hour with HEPA filters capturing 99.97% of particles. The risky moments are boarding and deplaning, when ventilation isn't at full capacity. The CDC specifically recommends a high-quality mask during those times.

8. Eat real food, not airport junk

Long-haul flight attendants eat clean before a flight - fruit, vegetables, lean protein, whole grains. Skip the airport bar and save the celebration drink for after you land.

9. Don’t pound the gym right after you land

Hammering your system when you’re already dehydrated and short on sleep is a fast track to a sore throat. Walk, drink water, stretch. Save the real workout for tomorrow.

The bottom line

You just need to do what the people who fly for a living already do - stay hydrated, stop drinking the tank water, wipe your seat, keep your hands off your face, and sleep before you go. A cold ruins a trip. For the price of a pack of wipes and a bottle of water, you’re buying yourself real insurance against both.