Refund.me offers the same service as AirHelp if you think you might be owed money in a delayed or canceled European flight and charges 15% plus tax if you sign over power of attorney within 28 days; 25% anytime after that.
AirHelpfights for your money. They’ll file a claim for you if you have been involuntarily bumped on a domestic flight and take 25% (including taxes) of every successful claim, nothing if you don’t get a cent.
Cranky Concierge can help with rebooking for canceled or missed connections (for a fee) if you’re battling a gazillion people trying to find seats on planes.
A good resource for getting through and between commercial airports. Track a flight arrival or see a terminal map for your airline’s gate. Check ground stop and departure delays. Find that perfect place to eat at your connecting terminal.