| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Jun 02 | BOS | VIE | 17:43 | 06:58 |
Landed
|
Track > |
| May 30 | BOS | VIE | 17:30 | 06:54 |
Landed
|
Track > |
| May 28 | BOS | VIE | 19:21 | 08:49 |
Delayed
|
Track > |
| May 26 | BOS | VIE | 17:41 | 07:17 |
Landed
|
Track > |
| May 23 | BOS | VIE | 17:10 | 07:10 |
Cancelled
|
Track > |
| Claim > | ||||||
| May 21 | BOS | VIE | 17:35 | 06:45 |
Landed
|
Track > |
| May 19 | BOS | VIE | 17:50 | 07:12 |
Landed
|
Track > |
| May 16 | BOS | VIE | 17:26 | 06:49 |
Landed
|
Track > |
| May 14 | BOS | VIE | 17:44 | 06:52 |
Landed
|
Track > |
| May 12 | BOS | VIE | 17:41 | 07:12 |
Landed
|
Track > |
United Airlines Flight UA9855 connects Boston, United States to Vienna, Austria, taking off from Boston Logan International Airport BOS and landing at Vienna International Airport VIE.
How long is the UA9855 flight from Boston to Vienna?
The average flight time from Boston to Vienna is 7 hours and 21 minutes. The flight distance is 6505 km / 4042 miles and the average flight speed is 877 km/h / 545 mph.
How many UA9855 flights are operated per week?
2 flights per week. The flight UA9855 is operated on Tuesday and Saturday.
What is the On-Time Performance (OTP) of United Airlines Flight UA9855 Boston to Vienna?
The Airportia On-Time Performance Rating for United Airlines Flight UA9855 is 4.8/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight UA9855 arriving at?
Flight UA9855 arrives at Vienna International Airport (VIE) Terminal 3.
When was the latest UA9855 flight?
The latest flight took off on Wednesday, June 3rd, 2026 with the flight status being Landed on 06:58.
How else can the flight UA9855 be referenced as?
This United Airlines flight can also be referenced as UAL9855, UA 9855, UAL 9855.
How often is flight UA9855 delayed?
On average, 40% of all UA9855 flights are delayed. The average delay is 27 minutes.
Can I get compensation for my delayed or cancelled UA9855 flight or baggage issues?
If your UA9855 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 UA9855 Flight Tracker above for more details.
Other flights departing from Boston BOS: AF333, B62459, DL5620, OS32
Other flights arriving at Vienna VIE: KE541, OS32, BT700, BT720
All flights connecting Boston BOS to Vienna VIE.
