Flight UA 521: Houston Bush → Boston
United Airlines4 October 2026Delayed 75 minUpdated 46 min ago, official airport data
Flight UA 521, 4 October 2026
All flights Houston Bush → BostonNot departed yet
Flight time: 4 h 04 min
Data from the official airport boards. Times are local to each airport.
Follow flight UA 521, 4 October 2026
We will message you when the status, time, terminal, check-in desk or gate changes on the airport board, exactly as the board shows it. Every message has a Stop button or link.
- Flight time
- 4 h 04 min
- Distance
- ≈ 2,567 km
- Days of the week
Punctuality of flight UA 521
The last 60 days of boards hold fewer than 5 finished flights with a known departure time: too few to count punctuality.
Flight UA 521: schedule and upcoming dates
- Days it flew in the last 60 days
- Usual departure time
- 18:35
- Usual arrival time
- 23:39
Dates already on the boards
- Sun 4 OctDeparture 18:35, Arrival 23:39Delayed 75 min
Route of flight UA 521
Departure airport: Houston Bush (IAH). Arrival airport: Boston (BOS). Scheduled flight time: about 4 h 04 min. Distance between the airports: about 2,567 km in a straight line.
See also
Questions about flight UA 521
Is flight UA 521 on time today?
For 4 October 2026 the airport board shows flight UA 521 as “Delayed 75 min”. Departure: Houston Bush, 19:50. Arrival: Boston, 00:54.
Which terminal and gate does flight UA 521 use?
Houston Bush (IAH): Terminal C, Gate C44. Boston (BOS): Terminal B. Gates are announced shortly before boarding and can change: check the screens at the airport.
How often is flight UA 521 delayed?
The last 60 days of boards hold fewer than 5 finished flights with a known departure time: too few to count punctuality.
How long does flight UA 521 take?
About 4 h 04 min by the schedule. The airports are 2567 km apart.
On which days does flight UA 521 operate?
In the last 60 days it was on the boards on: Sunday.
How can I get notified when flight UA 521 changes?
Use the notifications block at the top of this page: Telegram or e-mail. We will message you when the status, time, terminal, check-in desk or gate changes on the airport board, exactly as the board shows it. Every message has a Stop button or link.