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Dulles Intl

Cheap flights from St. Augustine (UST) to Dulles Intl (IAD)

UST — IAD
Aug 25 — Sep 11
Mon 8/25
Mon 9/1
1 adult, Economy
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Best time to book a flight from St. Augustine to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl 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 Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from St. Augustine to Washington, D.C. Dulles Intl Airport?

Currently, July is the cheapest month in which you can book a flight from St. Augustine to Washington, D.C. Dulles Intl Airport (average of $303). Flying from St. Augustine to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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 IAD?

Find hourly flight availability from St. Augustine to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 20, 2025.

Unlike in the evening, when flights are generally more expensive, you can save up to 78% on flights from St. Augustine to Washington, D.C. Dulles Intl Airport by exploring options for tickets at noon.

What is the cheapest day to fly from St. Augustine to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from St. Augustine to Dulles Intl. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their St. Augustine to Washington, D.C. Dulles Intl Airport flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday at noon 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 Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Augustine to Washington, D.C. Dulles Intl?

    For a flight from St. Augustine to Washington, D.C. Dulles Intl, you will be flying from Northeast Florida Regional. St. Augustine Northeast Florida Regional (UST) is just 4.7 mi from the center of the city. Northeast Florida Regional is the only St. Augustine airport and it handles 0 outbound flights to Washington, D.C. Dulles Intl per day. 0 airlines have flights to Washington, D.C. Dulles Intl from St. Augustine Northeast Florida Regional on a regular basis.

  • Can I find deals for flights from St. Augustine to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on St. Augustine to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Augustine to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Augustine to Dulles Intl.

  • Can I find deals for business class flights from St. Augustine to Dulles Intl?

    Yes. Cheapflights offers flight deals from St. Augustine to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from St. Augustine to Washington, D.C. Dulles Intl Airport?

    Currently, July is the cheapest month in which you can book a flight from St. Augustine to Washington, D.C. Dulles Intl Airport (average of $303). Flying from St. Augustine to Washington, D.C. Dulles Intl Airport in April is currently the most expensive (average of $337). 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.

See more FAQs

Traveling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Woodbridge
Arlington
Alexandria
Tysons
Silver Spring
Springfield
Fredericksburg
Gaithersburg
Towson
Linthicum Heights
Fairfax
Manassas
Falls Church
Laurel
Rockville
Oxon Hill
National Harbor
Dundalk
Waldorf
Bowie

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