BOS - UST

Find cheap flights from Boston to St. Augustine

1 adult
1 adult, Economy, 0 bags

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

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Everything you should know

Avoid delays
United Airlines
Most punctual • 89% on-time
Morning flights
Best time • Fewest delays
Insights
Insights
Insights
Insights
When to travel
June
Cheapest • 100% price drop
March
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Augustine!
Flight Deals
Booking Insights
Flight 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
Booking Insights

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 is the cheapest month to fly from Boston to St. Augustine?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Boston to St. Augustine, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Boston to St. Augustine is June, where tickets cost $0 (return) on average. On the other hand, the most expensive months are July and February, where the average cost of round-trip tickets is $517 and $367 respectively.

Find deals

Good to know

Low seasonAugust
Best time to beat the crowds with an average 46% drop in price.

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.
7.1
JetBlueOverall score based on 2971 reviews
7.9Crew
7.2Entertainment
7.3Boarding
6.6Food
7.5Comfort
Airline reviews

Excellent price. Everything on time. two bad parts. Kayak said I couldn't sign in for the flight online, but I got an email at the same time from Jet Blue and they let me sign in online. Second bad part was that, although I had provided my known traveler number, neither of my boarding passes, for this flight and the previous one, had TSA pre-check showing.

10.0 ExcellentTony, May 2026
BUF - RSW
Read more JetBlue reviews

Excellent price. Everything on time. two bad parts. Kayak said I couldn't sign in for the flight online, but I got an email at the same time from Jet Blue and they let me sign in online. Second bad part was that, although I had provided my known traveler number, neither of my boarding passes, for this flight and the previous one, had TSA pre-check showing.

Purchased through 3rd party vendor which made everything difficult. Unable to check in online. Unable to get flight updates easily, tsa precheck information didn’t carry through, longer time to check in in person. Entertainment looked good but had to purchase conventional headphones to view.

Flight emergency landed in Chicago due to “Odor” in back of plane . Had to buy ANOTHER TICKET to get to Boston cash out of my own pocket . Then they would notchange my return flight time without a 400. Charge!!!! Insulting.

Flight was as expected. But it was delayed an hour. Also, my luggage got damaged. So that sucked especially since the damage made navigating the airport difficult. Walking to get ground transportation is sooo far away now and my checked bag was difficult to carry.

we were an hour delayed after boarding and given no reason. Headsets cost money. Also there were openrows with no one setting in them but we were told we were not allowed to swtich.

Crew was very friendly. Did not like being jammed in the back middle seat. Don’t understand why I can not select an aisle for free based on first come first serve. Also first time I’ve been on a flight which attempted land then circled Detroit airport multiple times.

My experience with Jet Blue was wonderful. My experience with Kayak sucked and will never use again.

We were delayed and had to circle due to weather and had to divert for fuel. While I understand that you can’t control the weather I would have appreciated knowing that the crew wasn’t going to run out of hours and then having to spend the night in the Raleigh airport.

Messy plane that was falling apart Small screens that didn't work

I specifically choose not to check bags to ensure I can proceed directly to ground transportation upon arrival. However, due to a recurring lack of cabin space, I was again forced to gate-check my rolling luggage after going through my luggage to take out electronics and batteries. This practice unilaterally changes the service agreement made at the time of purchase. JetBlue needs to find a better way to manage overhead space that honors the carry-on baggage allowance.

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)