Flying with Medical Equipment

Airlines and TSA have specific rules for medical devices and medications. Most medical equipment travels free and does not count against carry-on limits — but advance planning is essential.

CPAP / BiPAP Machines

CPAP machines are exempt from the TSA 3-1-1 liquids rule and do not count against your carry-on allowance on US airlines. They are screened separately at security — remove from bag for X-ray.

Free carry-on: All major US airlines allow CPAP as a free medical carry-on (in addition to your standard carry-on and personal item)
In-flight use: Most wide-body aircraft have in-seat power — bring an extension cord and distilled water in a sealed container
Documentation: Carry a letter from your physician and the CPAP prescription label; not required at TSA but useful for airline staff
International: Check voltage compatibility (most modern CPAPs are 100–240V) and bring a plug adapter

Portable Oxygen Concentrators (POC)

FAA-approved POCs can be used in-flight. You must notify the airline at least 48 hours before departure and bring sufficient battery power for 150% of expected flight time including ground delays.

FAA-approved list: Check the FAA website for the current list of approved POC models — not all concentrators are approved
Notify airline in advance: Required — at least 48 hours before your flight
Battery requirement: Must carry enough battery for 150% of flight time including expected delays
Oxygen tanks: Compressed oxygen tanks are NOT allowed on commercial flights; only FAA-approved POCs are permitted

Wheelchairs & Mobility Aids

All US airlines must provide wheelchair assistance at no charge. Your personal wheelchair or mobility aid is free to check and takes priority handling.

Free to check: Personal wheelchairs (manual and electric) are always free to check on all US airlines
Does not count as a checked bag: Your wheelchair does not use up your checked bag allowance
Battery-powered chairs: Lithium battery wheelchairs have specific rules — notify the airline in advance; battery may need to be removed and placed in cabin
Priority handling: Wheelchairs are tagged "Priority" and returned at the aircraft door in most cases

Medications & Syringes

Medications (liquid and solid) are exempt from TSA's 3-1-1 rule. Syringes are allowed in carry-on with the accompanying vial of medication. Carry a physician letter for controlled substances.

Liquid medications: Any quantity allowed in carry-on; must be declared at the TSA checkpoint
Insulin and syringes: Allowed in carry-on; keep insulin cool with a medical cooling pack (gel packs under 5 oz are permitted)
Controlled substances: Carry in original prescription bottle with your name on the label; DEA-schedule II–V medications require a prescription
International travel: Some medications legal in the US are controlled in other countries — research your destination before traveling