Booking Guidance

Finding the deal is half the battle. Telling the user how to actually book it is the other half. Every recommendation should include a booking path.

Reference data: data/alliances.json has booking details for major programs in key_booking_relationships.

Program Fee Profiles

Check this before recommending a transfer or locking in a departure city. Fees vary dramatically by program and origin airport and can add $100-700+ per person on top of the miles cost. Two things to keep in mind reading the table: (1) several programs are surcharge-free on their own metal and most partners but pass heavy surcharges on specific partners (notably British Airways metal) — the YQ column calls those out; (2) dollar figures are per direction and scale with cabin — economy surcharges are materially lower than the business-class figures shown for surcharge-heavy metal. Rows marked ⚠️ are high-surcharge programs that often lose to cash.