They do different jobs, so the better one depends on which job you are doing. Kayak is metasearch: it scans airlines and agencies and shows you where a fare lives, then sends you there to book — Kayak never holds your reservation. Expedia is a travel agency: it sells you the ticket itself, so it is the party you deal with for changes, cancellations and refunds. Use Kayak to see the market, then book somewhere that will still answer the phone when a flight moves.
Ownership of the booking. Kayak compares prices and hands you off to whoever is selling the fare, so your reservation ends up with an airline or another agency and support goes through them. Expedia completes the purchase itself and holds the reservation, so there is a single point of contact afterwards. That difference does not show up in the price you compare, but it decides who helps you when a schedule changes.
Google Flights is generally faster and its calendar and price-graph views make date flexibility easier to read. Like Kayak it is metasearch — it does not sell the ticket, it points you at whoever does. Neither settles the booking question, only the survey question. Whichever you use to look, decide where to buy on the terms of the whole trip: baggage, schedule, cancellation rules and whether the hotel and transfers still fit.
Book where the complete itinerary can be validated before you pay, not just the flight. International trips carry the parts most likely to break a plan — long connections, baggage rules that differ by leg, visa and transit requirements, and an arrival that needs ground transport at an awkward hour. Fly2Any is built around that: flights are checked together with hotels, transfers, tours and activities before payment, so the price you compare is the price of a trip that works end to end.
Compare final fare, baggage, schedule, airport access, hotel location, transfer time, cancellation rules, and any must-do activities before payment.
Book when the total trip fits your budget and risk tolerance. If dates are flexible, compare nearby travel days before locking a nonrefundable fare.
Fly2Any lets travelers move from flight search into hotels, transfers, tours, activities, and cars so the booking decision reflects the full trip, not one isolated fare.
This article is planning guidance unless it names a specific observed dataset. Live search should be used for current prices, availability, and checkout terms.