Hypokalemia, or decreased potassium, can arise due to kidney diseases; excessive losses due to heavy sweating, vomiting, diarrhea, eating disorders, certain medications, or other causes. Increased sodium (hypernatremia) in the blood occurs whenever there is excess sodium in relation to water.
General Arrival Time. In general, the airlines and the Transportation Security Administration recommend that passengers arrive at the airport at least 90 minutes before domestic flights, including those to Hawaii and Puerto Rico. This allows ample time for you to check in for your flight, check baggage and go through security screening. This recommendation refers to the time you actually arrive in the airport terminal, though. If you need to park, return a rental car or ride a shuttle from the airport parking area, include time for that.
How early should I arrive to the airport prior to my flights departure? You are encouraged to arrive at the airport two hours prior to flight departure for domestic travel and three hours for international travel. This allows time for parking and shuttle transportation, airline check-in, obtaining a boarding pass, and going through the security screening process, which includes screening of your carry-on baggage. You are encouraged to contact your airline as times may vary depending on the airport and date of travel.