Flying with a sinus infection is generally a bad idea. Swollen, inflamed sinuses can’t equalize pressure properly during altitude changes, which can cause intense facial pain, ear problems, and in some cases, tissue damage called sinus barotrauma. The FAA advises pilots not to fly at all with a sinus infection or upper respiratory infection, and while passengers aren’t bound by those rules, the underlying physics applies to everyone on the plane.
That said, sometimes you can’t reschedule a flight. If you’re stuck traveling with congested sinuses, understanding the risks and knowing how to reduce them can make the difference between a miserable experience and a dangerous one.
Why Sinus Infections and Air Travel Don’t Mix
Your sinuses are air-filled cavities connected to your nasal passages through small openings called ostia. Under normal conditions, air flows freely through these openings, allowing pressure inside your sinuses to match the cabin pressure as the plane climbs and descends. When you have a sinus infection, the tissue lining those passageways swells and produces excess mucus, partially or completely blocking the openings.
The problem comes down to basic gas physics. As the plane descends and cabin pressure increases, the air trapped inside a blocked sinus can’t equalize. This creates a relative vacuum inside the sinus cavity. Your body tries to compensate by pulling fluid into the space, causing mucosal swelling, fluid buildup, and sometimes bleeding within the sinus lining. This is sinus barotrauma, and it can happen in any sinus cavity, though the frontal sinuses (behind your forehead) are the most commonly affected.
Descent is typically worse than ascent. During climb, expanding air can sometimes force its way out through a partially blocked opening. On the way down, air needs to get back in, and a swollen, mucus-filled passage is much harder to push through.
What It Feels Like
The most common symptoms are intense pressure or pain in the forehead, cheeks, or behind the eyes, especially during descent and landing. Among aircrew members who experience sinus barotrauma, nasal blockage is the most reported symptom (affecting about 45%), followed by ear fullness (35%) and ear pain (29%). Severe headaches during descent are strongly associated with sinus barotrauma in multiple studies.
Because the sinuses and ears share drainage pathways, a sinus infection can also cause significant ear problems during flight. The eustachian tubes, which connect your middle ear to the back of your throat, can become blocked by the same inflammation. This leads to the feeling of plugged ears, muffled hearing, and sharp pain that many travelers with colds or sinus infections describe.
Serious Complications to Watch For
Most people who fly with mild congestion end up uncomfortable but fine. However, a full-blown sinus infection raises the stakes. Possible complications include hemorrhage within the sinus lining, fluid accumulation that worsens the infection, and eardrum damage from the pressure differential.
After a flight, symptoms that should prompt a visit to a doctor include ear pain or muffled hearing lasting more than a few days, ringing in the ears, a spinning sensation (vertigo), or any bleeding from the ear. These can indicate barotrauma that needs treatment rather than something that will resolve on its own.
How to Reduce the Risk if You Must Fly
If rescheduling isn’t an option, the goal is to keep your sinus and nasal passages as open as possible, particularly during descent.
A nasal decongestant spray (like oxymetazoline) used about 30 minutes before the flight can shrink swollen tissue and temporarily open blocked passages. An oral decongestant (like pseudoephedrine) taken about an hour before the expected descent adds a second layer of protection. Using both together gives you the best chance of keeping those passageways open when it matters most. The spray works faster and targets the tissue directly, while the oral version provides longer, more systemic relief.
The Valsalva maneuver, where you close your mouth, pinch your nose, and gently blow, can help force air into blocked sinuses and ears during descent. The FAA recommends this as the primary technique for relieving trapped-gas pain in the sinuses. Don’t blow too hard, as aggressive pressure can cause its own problems. Swallowing, yawning, and chewing gum also help by activating the muscles around the eustachian tubes.
Pressure-regulating earplugs (sold under names like EarPlanes) are available at most pharmacies and can help slow the rate of pressure change reaching the eardrum. They won’t directly help your sinuses, but they can reduce ear-related pain, which often accompanies sinus congestion during flights. Staying well hydrated and using a saline nasal spray throughout the flight can also help keep mucus thinner and easier to drain.
Children Face Higher Risk
Kids with sinus infections or colds are more vulnerable to pressure-related pain during flights. Infants and young children can’t deliberately perform the Valsalva maneuver or other equalization techniques that older children and adults rely on. Children with a history of recurrent ear infections or enlarged adenoids have an especially hard time equalizing middle ear pressure, making the combination of a sinus infection and air travel particularly problematic.
For young children, nursing or bottle-feeding during descent encourages swallowing, which helps open the eustachian tubes. Pressure-regulating earplugs come in children’s sizes and can offer some protection. If your child has an active sinus or ear infection, delaying the flight is worth serious consideration.
When It’s Safe to Fly Again
The FAA’s guidance for pilots is straightforward: don’t fly until the infection has fully resolved and you’ve completed any course of antibiotics. For passengers, the same principle applies even though it isn’t enforced. Once your congestion has cleared and you can breathe freely through both nostrils without medication, your sinuses should be able to equalize normally. If you’re still relying on decongestants to breathe, you’re still at risk for barotrauma. Most acute sinus infections resolve within 7 to 10 days, so if you have the flexibility to push a flight back by a week or so, your sinuses will thank you at 35,000 feet.