Effect snapshot
Intervention Book domestic flights 6–8 weeks before departure vs 1 week before
Outcome Average fare paid per route
Effect 10–25 percent relative decrease
Confidence study
Context US domestic routes, economy class, 2019–2025 fare studies

Sources

What changes

Booking several weeks ahead is commonly associated with 10–25% lower average fares than one-week-out purchases on domestic routes.

When this tends to work

  • Conditions similar to: US domestic routes, economy class, 2019–2025 fare studies
  • You can measure Average fare paid per route reliably
  • The intervention is implemented consistently, not half-measured

When to be careful

  • Your audience or product differs materially from the cited context
  • Compliance costs or second-order effects outweigh the lift
  • Evidence label is study—treat wide ranges as planning bands, not promises

Practical takeaway

Use the cited range for prioritization and test design. Verify against your own data before scaling.