Cheap Flights from Boston to San Juan from US$137

Frequently Asked Questions

• What are the cheapest flights from Boston to San Juan (BOS-SJU)?

  Based on Trip.com data, American Airlines offers one-way fares as low as US$137 on Cheapest nonstop routes (e.g. BOS to SJU on Wed, Nov 11), while Frontier Airlines offers Cheapest nonstop round-trips from US$301 departing on Fri, Dec 11 and returning on Fri, Dec 18.

• Which airlines offer direct flights from Boston to San Juan?

  At the moment, you can catch a nonstop flight from Boston to San Juan with the following airlines, including: Delta Air Lines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from Boston to San Juan?

  It takes about 4 hours 4 minutes to fly from Boston to San Juan.

• When is the best time to book flights from Boston to San Juan?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Boston to San Juan is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Boston to San Juan?

  Based on Trip.com data in the past 4 weeks, there is 20 flight per week flying from Boston to San Juan. You can check the weekly schedule for popular airlines on this route below: Delta Air Lines: S/M/T/W/T/F/S -- DL1780 (09:12)

• How can I find the best deals on flights from Boston to San Juan?

  To find best deals on flights from Boston to San Juan, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Nov 11, with one-way flights priced at just US$137.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Delta Air Lines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Juan travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Boston (BOS) to San Juan (SJU) the cheapest?

  The cheapest months to fly from Boston to San Juan is August, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Boston to San Juan on?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from Boston to San Juan on October 30, 2026 with Frontier Airlines, with prices starting at US$153.

• Which airports fly into San Juan from Boston?

  You can land at any one of the following hubs in San Juan: Fernando Luis Ribas Dominicci Airport (SIG), and Luis Munoz Marin International Airport (SJU). Flying from Boston Logan International Airport to Luis Munoz Marin International Airport (BOS-SJU) is by far the most common option on this route.

• Is there any time difference between Boston and San Juan?

  The time difference between San Juan and Boston is 1h.

• How do I change or cancel my ticket from Boston to San Juan?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from Boston to San Juan?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Boston to San Juan is US$292. Fares vary by travel date, airline and availability.

• What is the average cost of a round-trip flight from Boston to San Juan?

  Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Boston to San Juan is US$545. The final price depends on the outbound and return dates, airline and fare conditions.

• How do I book flights from Boston to San Juan on Trip.com?

  Enter Boston and San Juan, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the Boston to San Juan route?

  Jetblue Airwaysare the most popular budget airlines flying from Boston to San Juan. Check baggage, seat and payment fees before comparing the final price.