Cheap flights from St. Augustine (UST) to Chicago (CHI)
UST — CHI
Dec 26 — Jan 21
1 adult, Economy
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1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Augustine to Chicago
Discover tips and strategies to find the most affordable flight options for your journey from St. Augustine (UST) to Chicago (CHI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated November 26, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
- Most accurate provider: When it comes to deals on St. Augustine-Chicago flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Augustine-Chicago flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Augustine-Chicago flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Augustine-Chicago flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Augustine-Chicago flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Augustine to Chicago
Have a flexible travel schedule? Discover the best time to fly to Chicago from St. Augustine with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Augustine to Chicago
What is the cheapest month to book a flight from St. Augustine to Chicago?
Currently, February is the cheapest month in which you can book a flight from St. Augustine to Chicago (average of $55). Flying from St. Augustine to Chicago in June is currently the most expensive (average of $113). 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 CHI?
Find hourly flight availability from St. Augustine to Chicago. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 26, 2025.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 52% on flights from St. Augustine to Chicago by exploring options for tickets in the evening.
What is the cheapest day to fly from St. Augustine to Chicago?
Use this chart to determine the cheapest time to fly round-trip from St. Augustine to Chicago. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their St. Augustine to Chicago flight should consider departing on Tuesday mornings when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Related info for your journey
Find useful and relevant information for your journey from St. Augustine to Chicago. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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