Hopper is a popular mobile app that uses AI to predict future flight prices and recommends when to buy. FlightKitten is a fare monitoring service that scans actual prices and alerts you when they hit your target. Different philosophies — here's how they compare.
Feature Comparison
| Feature | FlightKitten | Hopper | |
|---|---|---|---|
| Core approach | Real-time fare monitoring with target price alerts | AI price prediction with buy/wait recommendations | Tie |
| Booking | Links to Google Flights — you book at airline price | In-app booking with Hopper markup/fees | FK |
| Price freeze | Not available | Lock a price for 7-14 days for a fee | |
| Alerts | Email alerts when fare drops below YOUR target price | Push notifications with buy/wait advice | Tie |
| Platform | Web-based — works on any device | Mobile app only | FK |
| Airline coverage | 220+ airlines including budget carriers | Major airlines — missing many low-cost carriers | FK |
| Transparency | See exact fares, airlines, and AI analysis | Prediction algorithm is black-box | FK |
FlightKitten
Hopper
Our Verdict
FlightKitten is better for travelers who know their routes and want transparent, no-markup fare alerts. Hopper is better if you want price prediction and don't mind booking through their app. For pure deal-catching, FlightKitten's target price approach is more predictable.
Try FlightKitten Free — 14-Day TrialFrequently Asked Questions
Is FlightKitten more accurate than Hopper?
They do different things. FlightKitten monitors actual live fares — what you see is what you pay. Hopper predicts future prices, which can be hit-or-miss. FlightKitten doesn't predict; it catches real drops as they happen.
Does Hopper add markup to flight prices?
Hopper earns revenue through booking commissions and ancillary products (price freeze, cancel protection). Prices may differ from what airlines charge directly. FlightKitten links you to Google Flights where you book at the airline's own price with zero markup.
Can I use FlightKitten on my phone?
Yes — FlightKitten is web-based and works perfectly on mobile browsers. Alerts arrive by email, which works on any device. No app download required.