Domestic route
Cheap flights from Boston to San Juan
Boston Logan International Airport (BOS) to Luis Muñoz Marín International Airport (SJU). 1,679 miles, 3h 50m nonstop.
BOS to SJU at a glance
Computed from airline schedules and the fares we track for this route. Refreshed several times a day.
- Distance
- 1,679 milesgreat-circle
- Typical flight time
- 3h 50mnonstop, gate to gate
- Nonstop airlines
- AADLB6NK5 airlinesAmerican, Delta, JetBlue
- Nonstop flights per day
- 23all airlines combined
- Cheapest month
- October 2026over the next six months
- Best day to fly
- Tuesday18% less than Friday
- Time difference
- Same time zone
Boston to San Juan
Round trips from $134
Per traveler, taxes and fees included. Lowest fare we found departs Tue, Oct 6.
Cheapest month: October 2026
See fares on these datesLock any fare free — pay only when you accept your last-minute deal
Or ask an agent on WhatsAppBoston to San Juan fares by month
Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.
Airlines flying Boston to San Juan
5 airlines fly nonstop with 23 departures a day combined, plus 4 more with one stop.
- B6JetBlueNonstop · 10 flights a day · first checked bag from $40
- DLDelta Air LinesSkyTeamNonstop · 7 flights a day · first checked bag from $35
- AAAmerican AirlinesoneworldNonstop · 2 flights a day · first checked bag from $40
- F9Frontier AirlinesLow-costNonstop · 2 flights a day · first checked bag from $55
- NKSpirit AirlinesLow-costNonstop · 2 flights a day · first checked bag from $55
- G4Allegiant AirLow-costConnecting via SFB, PIE · first checked bag from $50
- MXBreeze AirwaysLow-costConnecting via CHS, TPA, RDU, ORF · first checked bag from $45
- WNSouthwest AirlinesLow-costConnecting via BWI, MCO, ATL · first checked bag from $35
- UAUnited AirlinesStar AllianceConnecting via EWR, IAD · first checked bag from $40
Connecting options
Hubs where one airline can carry you on both legs, most choices first.
- Newark (EWR)UA1 airline
- Washington (IAD)UA1 airline
- Baltimore (BWI)WN1 airline
- Orlando (MCO)WN1 airline
- Atlanta (ATL)WN1 airline
Tips for this route
- American, Delta, JetBlue and Spirit all fly BOS to SJU nonstop, so compare the total with bags before picking the lowest base fare: the difference between a basic and a standard economy ticket is often less than one checked bag each way.
- Departing on a Tuesday averages 18% less than a Friday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
- Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks.
Destination guide
San Juan: Caribbean beaches, no passport required
San Juan is the easiest tropical trip for US travelers: no passport, US dollars, cell plans that just work, and nonstops from more than 30 mainland cities. Old San Juan's blue cobblestones, Condado's beaches and El Yunque rainforest are the essentials.
Best time to visit: December–April is dry and busy; late April–June and November offer good weather with lower fares. August–October is hurricane season and the cheapest.
Flying the other way? San Juan to BostonFares, airlines and tips for SJU to BOS.Ready to compare live fares?
See every airline on BOS–SJU side by side with bags and seat rules spelled out.
Search Boston to San JuanBoston to San Juan: common questions
How long is the flight from Boston to San Juan?
A nonstop flight from Boston (BOS) to San Juan (SJU) takes about 3h 50m gate to gate, covering 1,679 miles. Connecting itineraries add the layover, typically 1 to 3 hours more in total.
Which airlines fly nonstop from BOS to SJU?
American Airlines, Delta Air Lines, JetBlue, Spirit Airlines and Frontier Airlines operate nonstop flights from Boston (BOS) to San Juan (SJU), with 23 nonstop departures a day between them. One-stop options connect through EWR, IAD and BWI.
What is the cheapest month to fly from Boston to San Juan?
Over the next six months, October 2026 has the lowest round-trip fares from Boston (BOS) to San Juan (SJU), starting at $134 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.
How far in advance should I book Boston to San Juan flights?
Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.
What is the time difference between Boston and San Juan?
San Juan is in the same time zone as Boston, so there is no clock change. BOS is on America/New York time and SJU on America/Puerto Rico time. Departure and arrival times in search results are always shown in local time at each airport.
Related routes
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