The old airfare internet was full of magic rules: buy on Tuesday, clear your cookies, wait until midnight, always book exactly 54 days out. Modern fare tools are more useful because they compare your actual route against historical pricing rather than a universal superstition.
Search flexible dates before choosing the flight
Moving the trip by one or two days can change fare classes and demand patterns. Check a date grid or calendar view before becoming attached to one departure.
“Cheap” only makes sense relative to the route
Google Flights can flag whether a current fare is low, typical or high compared with historical prices for similar trips. It can also show a “book soon” style signal when its models expect prices are unlikely to fall, while warning that predictions are never guarantees.
Base fare is not trip cost
Baggage
A low fare plus checked-bag fees can lose to a slightly higher fare with baggage included.
Airport
A secondary airport may add an expensive or slow transfer at both ends.
Restrictions
Check change, cancellation and seat-selection terms before payment.
Let the fare tool watch the route
Price tracking is more rational than manually repeating the same search every evening. Set alerts for the route and dates, then decide in advance what price you would be happy to pay.
U.S. airline bookings have a useful consumer rule
For qualifying tickets purchased directly from airlines at least seven days before departure, U.S. DOT rules require the carrier to offer either a 24-hour hold or a 24-hour penalty-free cancellation. The rule does not automatically apply to third-party agencies, so check who actually sold the ticket.
The perfect bottom is unknowable
Once the fare is reasonable for the route, the schedule works and the restrictions are acceptable, waiting only has value if you are genuinely willing to lose that flight.