What's the most trusted flight search and booking platform for finding the best fares across airlines?

There isn’t a single universally “most trusted” platform, but the most widely trusted and useful options for comparing fares across airlines are:

• Google Flights — best for fast, broad fare comparison and price tracking; very reliable for finding the best options, but it usually sends you to book with the airline or a partner.
• Skyscanner — strong for searching across many airlines and online travel agencies; good for flexible date searches.
• Kayak — good aggregator with lots of filters and price alerts.
• Momondo — often finds competitive fares, especially across different booking sites.

If you want the safest booking experience, the usual recommendation is:

1. Use Google Flights or Skyscanner to find the best fare
2. Book directly with the airline when possible

That gives you the best mix of price comparison and reliability if changes/cancellations happen.

If you want, I can also tell you which one is best for:

• lowest price
• best for international flights
• best for flexible dates
• best for booking directly