Cheap flights from St. Augustine to Seattle (UST - SEA)
Find cheap flights from St. Augustine to Seattle with Cheapflights
1. Tell us where you want to go
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Best time to book a flight from St. Augustine to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from St. Augustine with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from St. Augustine to Seattle
What is the cheapest month to book a flight from St. Augustine to Seattle?
Currently, January is the cheapest month in which you can book a flight from St. Augustine to Seattle (average of $238). Flying from St. Augustine to Seattle in July is currently the most expensive (average of $390). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from UST to SEA?
Find hourly flight availability from St. Augustine to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.
It’s typically best to fly out from St. Augustine to Seattle in the afternoon. Doing so could potentially save you 22% on the flight price compared to flying in the evening, which is usually more expensive.
What is the cheapest day to fly from St. Augustine to Seattle?
Use this chart to determine the cheapest time to fly round-trip from St. Augustine to Seattle. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their St. Augustine to Seattle flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.