BOS - UST

Find cheap flights from Boston to St. Augustine

1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to St. Augustine

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to St. Augustine, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Boston to St. Augustine, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 20% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Flights Deals
Expert advice
Useful Info
Flights Deals

Cheap Flights from Boston to St. Augustine (BOS-UST)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Boston to St. Augustine that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Boston to St. Augustine

Multiple Airlines Logo
BOS-UST
1031 mimulti-stop
Multiple Airlines Logo
UST-BOS
1031 mimulti-stop
Multiple Airlines
Find Deal
Expert advice

Expert advice for your flight from Boston to St. Augustine

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-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.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airlines
Southwest

Southwest allows two free checked bags up to 50 pounds each, including bulky items.


Southwest offers free cancellation up to 10 minutes before departure, with travel credit or refund.

Read more about Southwestby Blane Bachelor
Delta

Delta's Comfort Plus seats offer up to 3 inches of extra legroom in the economy cabin.


Delta offers free Wi-Fi for SkyMiles members on domestic flights, including messaging services.

Read more about Deltaby Stefanie Waldek
Spirit Airlines

Spirit's Big Front Seat offers 20-inch width and 11” extra legroom for a nominal fee.


Spirit's Go Big fare includes free Wi-Fi and priority check-in at select airports.

Read more about Spirit Airlinesby Joe Cortez
JetBlue

JetBlue offers free gate-to-gate Wi-Fi and seatback screens with live TV channels.


JetBlue’s Even More Space upgrade offers up to 7” extra legroom and priority security access.

Read more about JetBlueby Harriet Baskas
Our travel experts
Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Stefanie Waldek

Stefanie Waldek

Expert on Delta

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Joe Cortez

Joe Cortez

Expert on Spirit Airlines

Joe Cortez

Joe Cortez

Joe Cortez is a seasoned managing editor in aviation with over a decade of industry experience. His work has been featured on prominent platforms such as FlyerTalk and TripSavvy, establishing him as a respected voice in aviation journalism.

Read more
Harriet Baskas

Harriet Baskas

Expert on JetBlue

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Useful Info

KAYAK's insights & trends for Boston to St. Augustine flights

Get data-powered insights and trends into flights from Boston to St. Augustine to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Boston to St. Augustine?

The average price of all round-trip flights from Boston to St. Augustine clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from Boston to St. Augustine, look for departures on Tuesdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from St. Augustine, Thursday is the cheapest day to fly and Sunday is the most expensive.

Find deals

Good to know

Low seasonNovember
High seasonFebruary
Best time to beat the crowds with an average 36% drop in price.
Most popular time to fly and prices are also 22% lower on average.

When to book flights from Boston to St. Augustine

Are your dates flexible? Find out the best times to travel from Boston to St. Augustine based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Boston to St. Augustine

  • Do I need a passport to fly between Boston and St. Augustine?

    No, a passport isn't needed to fly from Boston to St. Augustine. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Boston to St. Augustine?

    We unfortunately don’t have that data for this specific route.

  • How does KAYAK find such low prices on flights from Boston to St. Augustine?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Boston to St. Augustine.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Boston to St. Augustine?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Augustine from Boston is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Boston to St. Augustine?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Augustine with an airline and back to Boston with another airline. Booking your flights between Boston and UST can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Boston to St. Augustine?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Augustine from Boston up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Boston to St. Augustine

 
See real verified KAYAK customer reviews for airlines flying from Boston to St. Augustine. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Boston to St. Augustine? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
JetBlueOverall score based on 2919 reviews
7.5Boarding
6.7Food
7.6Comfort
7.3Entertainment
8.0Crew
Airline reviews

You get what you pay for with JetBlue. Every little thing costs more, you are nickel and dimed until the end. Entertainment doesn’t function. Flight attendants do the bare minimum.

2.0 MediocreAllison, Jun 2025BOS - LAS
Read more JetBlue reviews

You get what you pay for with JetBlue. Every little thing costs more, you are nickel and dimed until the end. Entertainment doesn’t function. Flight attendants do the bare minimum.

Communication since no reason or explanation was given for 3 hrs delay

Excellent from start to finish. All staff members were amazing!

Excellent. Although they used to greet me as a mosaic member and provide a free drink, early boarding helps me to keep coming back to JetBlue.

It took 1-1/2 hours to get our luggage after we landed. That to me is unacceptable

Overall was excellent. Will definitely us JetBlue in the future.

The best flight I’ve had in a while. The plane was like 25% capacity, if that. Smoothest boarding and deplaning process I’ve ever experienced. Wish all flights were this smooth.

Like the space, did not like the snack options, there was no power outlet in seats, no entertainment, no flyfi.

Traveling with JetBlue from NYC was convenient as accessing JFK airport was straightforward via the LIRR to the AirTrain. Maneuvering through the terminal was hassle-free, which was a pleasant start to the journey. However, the flight experience itself left much to be desired. The seating arrangement was notably uncomfortable; despite securing a window seat, space felt cramped. This was exacerbated by the middle seat passenger encroaching on my area, which made the flight less enjoyable. Additionally, while the in-flight entertainment system initially seemed like a reprieve, the sound outlet on my seat was inoperable. This issue turned what could have been a manageable three-hour flight into a rather tedious ordeal, as I was unable to use the entertainment system effectively. While JetBlue provided a smooth process in terms of airport logistics, the on-board experience highlighted areas in need of improvement, particularly in terms of comfort and entertainment system maintenance.

The flight crew that we had in our section may have been tired or something. I asked the flight attendant about my son’s screen not working and she spoke down to me like I was stupid. He still had no working screen throughout his flight. The other members had no personality and seemed like they were annoyed when you asked them for something. Definitely took a hit for simple things on my JB experience.

Everything you need to know for your flight from Boston to St. Augustine

Information on your arrival and departure airports

Boston (BOS)
St. Augustine (UST)

Not what you’re looking for? Find thousands of other hotels, flights, car rentals and package deals with KAYAK.