| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Aug 23 | ACK | BOS | 15:10 | 14:05 |
Unknown
|
Track > |
| Aug 16 | ACK | BOS | 13:22 | 14:06 |
Landed
|
Track > |
| Aug 09 | ACK | BOS | 13:46 | 14:22 |
Landed Late
|
Track > |
| Aug 02 | ACK | BOS | 13:10 | 14:05 |
Cancelled
|
Track > |
| Claim > | ||||||
| Jul 26 | ACK | BOS | 13:38 | 14:15 |
Landed
|
Track > |
| Jul 19 | ACK | BOS | 13:22 | 14:01 |
Landed
|
Track > |
| Jul 12 | ACK | BOS | 13:32 | 14:08 |
Landed
|
Track > |
| Jul 05 | ACK | BOS | 14:16 | 14:52 |
Delayed
|
Track > |
| Jul 02 | ACK | BOS | 12:40 | 13:19 |
Landed
|
Track > |
| Jun 28 | ACK | BOS | 13:29 | 14:07 |
Landed
|
Track > |
Cape Air Flight 9K5121 connects Nantucket, United States to Boston, United States, taking off from Nantucket Memorial Airport ACK and landing at Boston Logan International Airport BOS.
How long is the 9K5121 flight from Nantucket to Boston?
The average flight time from Nantucket to Boston is 38 minutes. The flight distance is 146 km / 91 miles and the average flight speed is 217 km/h / 135 mph.
How many 9K5121 flights are operated per week?
1 flight per week. The flight 9K5121 is operated on Sunday.
What is the On-Time Performance (OTP) of Cape Air Flight 9K5121 Nantucket to Boston?
The Airportia On-Time Performance Rating for Cape Air Flight 9K5121 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight 9K5121 arriving at?
Flight 9K5121 arrives at Boston Logan International Airport (BOS) Terminal C.
When was the latest 9K5121 flight?
The latest flight took off on Sunday, August 23rd, 2026 with the flight status being Unknown on 14:05.
How else can the flight 9K5121 be referenced as?
This Cape Air flight can also be referenced as KAP5121, 9K 5121, KAP 5121.
How often is flight 9K5121 delayed?
On average, 60% of all 9K5121 flights are delayed. The average delay is 13 minutes.
Can I get compensation for my delayed or cancelled 9K5121 flight or baggage issues?
If your 9K5121 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 9K5121 Flight Tracker above for more details.
Other flights departing from Nantucket ACK: TJ853, TJ2001, TJ5001, TJ28
Other flights arriving at Boston BOS: DL2373, UA1606, QK8544, 9K955
All flights connecting Nantucket ACK to Boston BOS.
