Should not be a problem except for the most sensitive celiacs. The amount of gluten that would get in the air from cooking alone has got to be miniscule. I would be more concerned about cross contamination happening in other ways in a living environment where others are preparing and consuming gluten-containing foods. Thinks like shared cooking surfaces and countertops. And what about that toaster you mentioned?

Hello, @NCalvo822, Blood tests for Celiac Disease test for antibodies our bodies make in response to gluten exposure.  These Tg IgA 2 antibodies mistakenly attack our own bodies, causing problems in organs and tissues other than just the digestive tract.  Joints can ache, thyroid problems or the pancreas can develop.  Ataxia is just one of over two hundred symptoms of Celiac Disease. Some people with Celiac Disease also make tTg IgA 6 antibodies in response to gluten exposure.  The tTg IgA 6 antibodies attack the brain, causing ataxia.  These tTg IgA 6 antibodies are also found in people with Parkinson's disease, though they may not have Celiac Disease.  First degree relatives (parents, siblings, children) of those diagnosed with Celiac should be tested as well.  Celiac is genetic.  Your mom and sister should be tested for Celiac, too!   Definitely a good idea to keep to a gluten free diet.  

@Rebeccaj,  When you smell toast or pasta cooking, that means that particles of that food are floating around in the air.  Airborne gluten can then be inhaled and swallowed, meaning the food particles get into your digestive tract.   If you're careful to avoid gluten and are still having symptoms, those symptoms could be caused by vitamin deficiencies.  

ok thanks for your advice. But my question was what happens when someone you know in a house is cooking pasta or toast that's flour  Airbourne without eating.?

Do discuss this recent article with your doctors.  Thiamine Vitamin B 1 is important to intestinal health.  Thiamine deficiency can occur in Celiac Disease due to malabsorption.  Supplementing with a B Complex, Benfotiamine, and Vitamin D can help symptoms.   Thiamine deficiency aggravates experimental colitis in mice by promoting glycolytic reprogramming in macrophages https://pubmed.ncbi.nlm.nih.gov/39890689/#:~:text=Our mechanistic study revealed that,necessary to protect against colitis. "Conclusion and implications: Our study provides evidence linking thiamine deficiency with proinflammatory macrophage activation and colitis aggravation, suggesting that monitoring thiamine status and adjusting thiamine intake is necessary to protect against colitis."