For some minor or common illnesses, passengers can typically board a flight without any issues. However, certain medical conditions may worsen or become life-threatening due to changes in altitude and cabin pressure. In these cases, airlines require passengers to obtain health clearance before flying.

Which medical conditions are required to have health clearance before flying?
Asthma and Other Chest Conditions
For this condition, passengers may fly if their symptoms are well-controlled. It is advisable to carry a standard inhaler and seek medical advice if wheezing occurs before the flight. It is particularly important to consult a doctor if the passenger experiences shortness of breath even at rest, is unable to walk 50 meters, or struggles to climb a single flight of stairs without difficulty breathing.
Heart Conditions
Passengers are able to fly if they can comfortably climb two flights of stairs and their blood pressure is well-controlled.
However, passengers should avoid flying if they have recently experienced a heart attack (myocardial infarction). For those who frequently suffer from chest pain (characterized by pain in the chest), the risk of experiencing such pain on an airplane is twice as high as on the ground. It is advisable to consult a doctor before flying and ensure that sufficient medication is available to relieve chest pain.
Diabetes

Health Clearance for Air Travel
If you have diabetes, you may still fly as long as the condition is stable and well-controlled. You can pre-order special meals when purchasing your ticket, inject insulin, and eat on schedule. Diabetics often face challenges adjusting to meal times and medication across multiple time zones. Therefore, passengers should try to maintain their usual sleep schedule throughout the journey and only adjust to the local time once they arrive at their destination.
Deep Vein Thrombosis
Passengers with this medical condition may be allowed to fly if they meet the following conditions:
- Agree to sign a waiver provided by the airline or submit a medical certificate from a doctor confirming their fitness for travel.
- Notify the airline of the passenger's medical condition when booking the flight.
Hãng hàng không khuyến cáo hành khách mắc bệnh lý này nên tiếp tục tập luyện cơ bắp chân trong khi bay. Thường xuyên đi bộ xung quanh khoang hành khách, trừ khi ký hiệu "thắt đai an toàn" bật. Trong khi ngồi, thực hiện một vài bài tập đơn giản như minh họa trong cuốn tạp chí hoặc video trên máy bay, tránh uống rượu, bia và phải uống nhiều nước để giữ đủ nước cho cơ thể trong suốt hành trình.
Đột quỵ
Khách có tiền sử bị đột quỵ nhưng đã trải qua ít nhất 03 tuần trước ngày bay thì vẫn có thể được bay. Bạn cần hoàn tất quy trình xác minh sức khỏe của chúng tôi để chứng nhận đủ sức khỏe thực hiện chuyến đi. Lưu ý mang theo đủ lượng thuốc trong suốt hành trình.
Epilepsy

Health Check for Air Travel
You may be allowed to fly if your most recent seizure occurred at least 24 hours ago. Passengers should ensure they carry enough medication for the entire journey.
Anemia with blood cell count or hemoglobin below 8.5mg/dl
If you have this condition, it is absolutely advised not to fly under any circumstances, as the risks involved can be extremely serious.
We hope the information provided helps Mytour customers make the best preparations for their upcoming flights. Don’t hesitate to contact our hotline 1900 2083 for quick and efficient flight booking assistance from Mytour.
T. Year, 19/10/2023 10:23
