What if prices drop after I book using the stop rule?

This will happen sometimes, and it's normal. The stop rule protects you from the much more common scenario of prices rising while you endlessly search. You saved time and mental energy.

How do I know if 10-15% above historical low is reasonable?

Check multiple routes and time periods. If historical lows seem like one-time anomalies (major sales, pandemic pricing), adjust your threshold to 15-20% above more typical low prices.

Should I use price alerts instead of active searching?

Price alerts work well with the stop rule. Set alerts for your target price, then stop manually searching. Book when the alert hits your predetermined threshold.

What if I'm booking for a group?

The stop rule becomes more important with groups because coordinating multiple people's schedules makes rebooking harder. Set a slightly higher threshold (20% above historical lows) to account for group complexity.

How to Use the Search Stop Rule When Looking for Flights

Stop searching for flights after you find a fare that's within 10-15% of the historical low price for your route. Set a price threshold before you start, and book when you hit it rather than endlessly searching for a better deal.

Research the baseline price for your route. Use Google Flights' price graph to see what this route has cost over the past 12 months. Note the lowest and average prices. Your target should be within 10-15% of the historical low.
Set your maximum acceptable price before searching. Write down the exact dollar amount you're willing to pay. If historical lows were $400, your stop-search price might be $450. Stick to this number.
Search systematically, not repeatedly. Check 3-4 booking sites once per day maximum. More frequent checking doesn't improve prices and creates decision fatigue. Use different browsers or clear cookies between sites.
Book immediately when you hit your target price. Don't second-guess yourself. If you find a fare at or below your predetermined threshold, book it within 24 hours. The mental cost of continued searching outweighs small potential savings.
Stop all searching once you've booked. Delete flight apps from your phone. Avoid checking prices after booking. What you don't know can't stress you out.

What if prices drop after I book using the stop rule?: This will happen sometimes, and it's normal. The stop rule protects you from the much more common scenario of prices rising while you endlessly search. You saved time and mental energy.
How do I know if 10-15% above historical low is reasonable?: Check multiple routes and time periods. If historical lows seem like one-time anomalies (major sales, pandemic pricing), adjust your threshold to 15-20% above more typical low prices.
Should I use price alerts instead of active searching?: Price alerts work well with the stop rule. Set alerts for your target price, then stop manually searching. Book when the alert hits your predetermined threshold.
What if I'm booking for a group?: The stop rule becomes more important with groups because coordinating multiple people's schedules makes rebooking harder. Set a slightly higher threshold (20% above historical lows) to account for group complexity.