Flight Attendant Current
Physiological - Other
Flight Deck / Cabin / Aircraft Event Illness / Injury; Flight Deck / Cabin / Aircraft Event Smoke / Fire / Fumes / Odor
Flight Crew Overcame Equipment Problem; General Maintenance Action
Aircraft
I was working the D position on this turn (ZZZ>ZZZ1>ZZZ). I came onboard with a slight headache; throughout the trip it got worse; due to the bad smell onboard. During boarding; a passenger came onboard and asked right away 'Do you guys smell that sulfur smell?'  I smelt it; but not strong enough to worry about it.  Once we closed the boarding door; the smell became stronger and the air seemed a bit hazy; but still I didn't think much of it.  The A FA had a clogged nose; so she didn't smell anything throughout the trip.  During the flight I walked around the aircraft and every time I would walk up to the front; the smell would catch me off guard and the headache would worsen.  Once we landed in ZZZ1; the FAs in the aft said that upon landing and taxiing; the smell became really bad; almost unbearable.  We informed the Captain and Maintenance came onboard.  They blasted air in the aircraft; which made the smell dissipate. Then they tried recreating the scenario by closing the aircraft doors and testing one engine at a time.  The smell did not come back; so we decided it was again safe for boarding. Upon arrival back to ZZZ; the FAs in the back said that there was slight smell; but not as bad as before.
Flight Attendant reported a 'sulfur' type odor during multiple flight legs. Maintenance action at stop over greatly improved the conditions.