Momondo vs Kayak

Momondo and Kayak both land on Worth it.

Momondo

Worth it

Confidence: Medium

Free metasearch that consistently finds cheap fares . use it to compare, then book direct with the airline when the price is close.

Worth it

Confidence: Medium

Use KAYAK free to compare flights, hotels, and cars . the search side is solid and the app is well reviewed.

Momondo versus Kayak
Compare	Momondo	Kayak
Verdict	Worth it	Worth it
Best for	Price-sensitive leisure travelers	Deal-hunting leisure travelers
Who it's not for	Travelers who want one company accountable end-to-end	Travelers wanting one accountable party for the whole booking
Privacy	No breach reported in reviewed sources; runs a HackerOne program, but 2,744 domain credentials appear in infostealer logs.^⁸	Security page, dedicated team, and HackerOne bounty exist; two public incidents: a 2012 data-exposure glitch and a 2022 account-takeover disclosure.¹⁴
Support quality	Third-party sellers handle issues; dispute complaints common	Complaint sites document hard-to-resolve booking disputes
Public sentiment	Loved for finding cheap fares, but booking problems with third-party sellers drive the loudest complaints.^²	Users like the search experience, but a vocal minority report misleading prices, booking disputes, and hard-to-reach support.¹⁰
Biggest gotcha	Support depends on the third-party seller you book, not Momondo	ConsumerAffairs lists misleading-pricing complaints; confirm the final price before paying¹²