After woring on construction of a major airport the places like one guy said would be the plane ramps. There will be some fire blankets in main terminal uou can use to get the drop to a manageable 3 feet. Sometimes they have fire hose on reels.
Second there are service ways behind restaraunts /stores for moving inventory. Most are simple squ are key lock if you are in store look under till counter it will most likely be there on a stupid over sized key chain so staff don’t loose it.
Third go up… the roof access are at end points by fire regulations. .. you can use these to get to a downn ladder. The last 10 feet will have saftey cover so be prepared to drop. Take off pants and use as knot.
Also use distraction… want a mess fast start a trash fire suppression will go off and certain security door have a auto unlock incase of fire.
Hiding spots go up on top of kiosks. If you are near an check in or baggage pick up… use the baggage chute just hit the red stop button before you go down some of the machinery can in jure you or small kids.
As for weapon…Airport you are mainly f*&$ed as non available. Only in small airports can you get a carbon fiber stab tool in but that is risking jail. A fire extinguisher is a good one shot weapon dust to the face then metal cylinder as a club.
Some of the long glass walk ways will have movable incase of emergancy glass look for a red or yellow linen or tag near baseboard windows in long gallery.