| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jan 04 | SJU | BOS | 14:32 | 17:17 |
Landed
|
Track > |
| Jan 03 | SJU | BOS | 14:08 | 17:36 |
Cancelled
|
Track > |
| Claim > | ||||||
| Jan 02 | SJU | BOS | 15:44 | 18:37 |
Delayed
|
Track > |
| Jan 01 | SJU | BOS | 15:26 | 18:05 |
Landed Late
|
Track > |
| Dec 31 | SJU | BOS | 14:22 | 16:52 |
Landed
|
Track > |
| Dec 30 | SJU | BOS | 14:25 | 17:19 |
Landed
|
Track > |
| Dec 29 | SJU | BOS | 14:29 | 17:15 |
Landed
|
Track > |
| Dec 28 | SJU | BOS | 14:38 | 17:32 |
Landed
|
Track > |
| Dec 27 | SJU | BOS | 14:18 | 17:07 |
Landed
|
Track > |
| Dec 26 | SJU | BOS | 15:07 | 17:52 |
Landed Late
|
Track > |
Delta Air Lines Flight DL1721 connects San Juan, Puerto Rico to Boston, United States, taking off from San Juan Luis Munoz Marin International Airport SJU and landing at Boston Logan International Airport BOS.
How long is the DL1721 flight from San Juan to Boston?
The average flight time from San Juan to Boston is 3 hours and 46 minutes. The flight distance is 2702 km / 1679 miles and the average flight speed is 706 km/h / 439 mph.
What is the On-Time Performance (OTP) of Delta Air Lines Flight DL1721 San Juan to Boston?
The Airportia On-Time Performance Rating for Delta Air Lines Flight DL1721 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight DL1721 arriving at?
Flight DL1721 arrives at Boston Logan International Airport (BOS) Terminal A.
When was the latest DL1721 flight?
The latest flight took off on Sunday, January 4th, 2026 with the flight status being Landed on 17:17.
How else can the flight DL1721 be referenced as?
This Delta Air Lines flight can also be referenced as DAL1721, DL 1721, DAL 1721.
How often is flight DL1721 delayed?
On average, 30% of all DL1721 flights are delayed. The average delay is 35 minutes.
Can I get compensation for my delayed or cancelled DL1721 flight or baggage issues?
If your DL1721 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our DL1721 Flight Tracker above for more details.
Flight DL1721 is code-shared by 2 airlines using the flight numbers KL6985, LY4054
Other flights departing from San Juan SJU: B61890, WN1450, AA3304, F94139
Other flights arriving at Boston BOS: DL2537, DL2434, DL5791, DL5607
All flights connecting San Juan SJU to Boston BOS.