KAYAK
#3 in Flight Booking · Rated 4.5
Global flight search with price alerts and flexible fare options
KAYAK is a leading metasearch for travel that aggregates flight data from hundreds of sources, offering price alerts, ‘Hacker Fares’ (combining one-way legs for savings), and a broad set of filters. It’s known for powerful search capabilities and a strong ecosystem within Booking Holdings. In 2025, KAYAK maintains robust price tracking, flexible search, and a broad language and country footprint. It is ideal for travelers who want to compare many sources in one place and exploit creative fare strategies. Headquarters are in Stamford, CT, with Booking Holdings as parent. Founded 2004; public listing in 2010; part of Booking Holdings since 2013. ([kayak.com](https://www.kayak.com/c/help/pricing/?utm_source=openai))
Features
- Price Alerts and Price Forecast
- Hacker Fares and Mix & Match options
- Explore and flexible date views
- Wide source coverage from airlines and OTAs
Pros
- Extensive aggregation with diverse fare options
- Strong price-tracking tools and explore features
- Part of Booking Holdings with broad reach
Cons
- Results can be redirected to multiple booking sites
- Interface can feel dense for casual users