The flight time from Boston to San Juan is 3 hours, 54 minutes. See Data as Tables

Average Timeline

Leaves BOS Boston, MA 3 minutes late.
17 minutes taxiing out
3 hours, 29 minutes in the air
5 minutes taxiing in
Arrives SJU San Juan, PR 2 minutes early.

Flight Reliability By Airline ?

Delta
88%
JetBlue
68%
Spirit
60%
Cancelled
Delayed*
Normal

Flight Summary

The flight time from Boston to San Juan is 3 hours, 54 minutes. The time spent in the air is 3 hours, 29 minutes.

The flight distance from Boston to San Juan is 1674 Miles.

Reverse Journey

San Juan to Boston
4 hours, 7 minutes

Flight Time By Airline ?

Spirit
3h 53m
JetBlue
3h 54m
Delta
3h 55m
Taxiing Out
Air Time
Taxiing In

Flight Time by Time of Day ?

12AM06AM12PM06PM1h2h3h
Taxiing Out
Air Time
Taxiing In

Flights By Time of Day ?
(Average)

12AM06AM12PM06PM0.00.20.40.60.81.0

Flights Per Week

35

Distance

1674 Miles

Flights By Month ?

JFMAMJJASOND050100150

Flights By Day of Week ?
(Average)

MonTueWedThuFriSatSun0246

Flights By Airline ?
(Per Week)

JetBlue
21
Spirit
7
Delta
6

Frequently Asked Questions

How far is Boston from San Juan by plane?

The distance from Boston to San Juan by plane is 1674 Miles. This is the air distance on the most direct route taken by the vast majority of flights.

How long is the flight from Boston to San Juan?

The flight time from Boston to San Juan is 3 hours, 54 minutes. The time spent in the air is 3 hours, 29 minutes. These numbers are averages. In reality, it varies by airline with Spirit being the fastest taking 3 hours, 53 minutes, and Delta the slowest taking 3 hours, 55 minutes.

What airlines fly from Boston to San Juan?

Delta, Spirit, and JetBlue are the airlines with direct flights from Boston to San Juan.

Does Southwest fly from Boston to San Juan?

Southwest does not fly from Boston (BOS) to San Juan (SJU). Keep in mind that Southwest may fly to other nearby airports, as they will often fly into smaller airpors instead of larger ones. This is because the costs are often lower to fly into smaller airports, and they pass the savings on to you.

Tables and Explanations

Data Source

Our information is computed from the latest available data from the US Department of Transportation.

Average Timeline Timeline Chart

The average timeline contains the median time a flight spends in 3 stages. The first of these three stages is taxiing out which includes the time from the flight leaving the gate to taking off. The second stage is in the air, which includes the time spent from the flight leaving the ground to touching back down at the end of it's journey. The last stage is taxiing in, which is from when the flight touches down to the flight arriving at it's gate.

The average timeline also estimates on average of when the flight will leave and arrive relative to it's stated departure time.

Leaves Boston 3 minutes late
Taxi Out Time 17 minutes
In the Air 209 minutes
Taxiing In 5 minutes
Arrives San Juan 2 minutes early

Flight Reliability Reliability Chart

The reliability of an airline measures how often the airline's flights on this route are cancelled or delayed more than 20 minutes. For example, from Boston to San Juan, Spirit is 60% reliable, which means that Spirit flights are on time 60% of the time, and cancelled or delayed the remaining time.

Airline Normal Flights Arrival Delayed* Flight Cancelled
Delta 88% 12% 0%
JetBlue 68% 30% 2%
Spirit 60% 37% 3%

Flight Time By Airline Flight Time By Airline Chart

Each airline takes a different amount of time to fly between Boston and San Juan, this is due to different operational factors on the ground, as well as scheduling of planes. Each airline's flight time is split into three stages which are described above in the "Average Timeline" section. There are also miscellaneous operational issues which are included in the below total but are not accounted for in one of the three stages.

Airline Taxiing Out
(minutes)
In the Air
(minutes)
Taxiing In
(minutes)
Total
(minutes)
Spirit 14 211 5 233
JetBlue 17 209 6 234
Delta 22 207 5 235

Flights By Time of Day Flight Time By Day Chart

This one is pretty self explanatory, it represents the number of flights that leave the gate in a given hour of the day. The tricky thing here is that this is normally not a whole number since it is an average over 52 weeks. Partial numbers may indicate that a flight may be seasonal or may take off at different times due to different operational factors.

Time Count
6pm 0.02
5am 0.07
11pm 0.33
9am 0.3
12pm 0.41
7pm 0.21
2pm 0.16
3pm 0.1
10am 0.1
6am 0.57
11am 0.33
9pm 0
5pm 0.19
7am 0.99
4pm 0.04
8pm 0.23
10pm 0.34
8am 0.39
1pm 0.21

Flights By Month Flights By Month Chart

The quantity of flights from Boston to San Juan that take off in a given month of the year. This number changes because some flights are seasonal, and almost all flights have uneven demand througout the year.

Month Count
January 129
February 143
March 163
April 181
May 159
June 162
July 176
August 176
September 118
October 142
November 157
December 155

Flights By Day Of Week Flights By Day of Week Chart

The quantity of flights from Boston to San Juan that take off on a given day of the week. Some routes only have enough demand to sustain a few trips a week, while others have many flights a day. This number is also an average across the year, and hence may not be a whole number.

Day Count
Monday 5.29
Tuesday 5.06
Wednesday 4.83
Thursday 5.19
Friday 5.23
Saturday 4.85
Sunday 5.35

Flight per Airline (per Week) Flights By Airline Chart

How many times an airline flies this route in a week. Different factors play into how often a carrier chooses to fly a given route including it's need to connect disparate routes, and demand.

Airline Flights per Week
JetBlue 0
Spirit 0
Delta 0

Flight Time By Time of Day Flight Time by Time of Day Chart

The total flight time varies by each hour of the day due to factors such as airport traffic. More flights leaving an airport may cause higher taxi in or taxi out times. See the description of the average timeline above for a deeper discussion of each of these times.

Time Taxi Out
(minutes)
In the Air
(minutes)
Taxi In
(minutes)
Total
(minutes)
6pm 16 209 4 234
5am 13 206 6 226
11pm 15 206 7 231
9am 17 213 7 239
12pm 15 212 5 233
7pm 17 207 5 231
2pm 17 211 6 238
3pm 14 213 5 233
10am 16 212 6 237
6am 17 208 6 234
11am 14 214 6 236
9pm 19 200 6 225
5pm 17 203 5 227
7am 21 207 5 234
4pm 17 208 5 230
8pm 16 207 5 233
10pm 15 208 5 229
8am 22 210 5 239
1pm 18 208 7 235
* Delayed more than 20 minutes.
All data above is a median or mean as appropriate.