Executive Travel’s Airfare Index has now recorded four straight months of falling airfares. Prices are dropping, and not just a little. With fall and winter (outside the holiday rush) on the horizon, seasonal price dips are taking hold. It seems many savvy travelers skipped the hot, high-priced months of July and August, opting instead for cooler, quieter September and October getaways. If you’re planning a trip this fall, you may be pleasantly surprised by what you find in the fare search results.