Enjoy free snacks and non-alcoholic drinks, plus a free drink on special occasions.
Southwest offers two free checked bags, including oversized items like skis or golf clubs.
Cheap flights from Philadelphia to St. Augustine (PHL - UST)
PHL — UST
ago. 18 — ago. 251
1 adult, Economy
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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 Philadelphia to St. Augustine
Discover tips and strategies to find the most affordable flight options for your journey from Philadelphia (PHL) to St. Augustine (UST). 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 agosto 13, 2025.
Popular in | June |
|---|---|
Cheapest in | January |
Average price | $158 |
The best insider tips for Philadelphia to St. Augustine flights
Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Philadelphia to St. Augustine trip
Airlines
![Southwest]()
Southwest
![Spirit Airlines]()
Spirit Airlines
Spirit's Big Front Seats offer 11 inches more legroom and larger tray tables for laptops.
Spirit's Saver$ Club offers rotating deals and discounts on luggage and seats.
Our travel experts
Best time to book a flight from Philadelphia to St. Augustine
Have a flexible travel schedule? Discover the best time to fly to St. Augustine from Philadelphia 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 Philadelphia to St. Augustine
What is the cheapest time of day to fly from PHL to UST?
Find hourly flight availability from Philadelphia to St. Augustine. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated agosto 13, 2025.
Unlike at noon, when flights are generally more expensive, you can save up to 41% on flights from Philadelphia to St. Augustine by exploring options for tickets in the afternoon.
What is the cheapest day to fly from Philadelphia to St. Augustine?
Use this chart to determine the cheapest time to fly round-trip from Philadelphia to St. Augustine. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their Philadelphia to St. Augustine flight should consider departing on Sunday at noon when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing St. Augustine
Get insights into the airlines that provide service to St. Augustine. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Augustine. Reviews last updated agosto 13, 2025.
Read reviews from past customers who have flown Frontier from Philadelphia to St. Augustine. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
4.5
Crew
6.7
Food
4.7
Comfort
5.6
Boarding
6.1
Overall
5.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2025
TTN - TPA
Entertainment
4.5
Crew
6.7
Food
4.7
Comfort
5.6
Boarding
6.1
Overall
5.8
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2025
TTN - TPA
Related info for your journey
Find useful and relevant information for your journey from Philadelphia to St. Augustine. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Augustine?
Book flights to St. Augustine if you plan to visit one of these locationsVilano Beach
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Alternative routes for Philadelphia to St. Augustine
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Top airline flying from Philadelphia to St. Augustine
Discover the top airline that operate flights from Philadelphia to St. Augustine. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated agosto 13, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$68 | Average$168 | FlexibilityNo cancel fee | On-time62% |