To save up to 26% on this flight, we recommend booking at least 21 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St Augustine to Lehigh Valley from $229 1-2 weeks out and tickets from $301 for flights departing within the next 72 hours.
Due to multiple factors, expect to potentially pay more when booking in December. For low rates, August can be a great choice for travel to Lehigh Valley. Flights to Lehigh Valley from St Augustine in August are about $235 on average during August, but can be found for as low as $62.