Cheap flights from St. Augustine (UST) to Key Largo, FL
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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.Cheap flight deals from St. Augustine to Key Largo
Keep the following information in mind while searching for St. Augustine to Key Largo flight deals. Data was last updated October 30, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Cheapflights Insights
Everything you need to know about your flight from St. Augustine to Key Largo
What is the cheapest month to book a flight from St. Augustine to Key Largo?
Currently, March is the cheapest month in which you can book a flight from St. Augustine to Key Largo (average of $38). Flying from St. Augustine to Key Largo in July is currently the most expensive (average of $70). 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 KE9?
Unlike in the morning, when flights are generally more expensive, you can save up to 67% on flights from St. Augustine to Key Largo by exploring options for tickets in the evening.
What is the cheapest day to fly from St. Augustine to Key Largo?
Travelers seeking maximum savings on their St. Augustine to Key Largo flight should consider departing on Friday evenings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.