Is UA1665 delayed?
Each route and date is shown separately. Confirm that both airports match your booking.
Service date: · Scheduled departure date (America/Los_Angeles)
42 min early
Official source · Updated
Departure
San Francisco
SFO
Actual
Sep 19
Arrival
Boston
BOS
Actual
Sep 20
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Not available
- Actual
Market prices express trading expectations about a contract’s stated threshold. They do not confirm airline status. The linked market shows its terms and activity.
Service date: · Scheduled departure date (UTC)
16 min late
Official source · Updated
Departure
Ontario
ONT
Actual
Sep 19
Arrival
San Francisco
SFO
Actual
Sep 18
Times shown in airport local time
Flight details
Departure · UTC
- Scheduled
- Estimated
- Not available
- Actual
Arrival · UTC
- Scheduled
- Estimated
- Actual
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 42 min early
SFO → BOS
- 17 min early
SFO → BOS
- 16 min late
ONT → SFO
- 12 min early
SFO → BOS
- 88 min late
ONT → SFO
Flight history and details
Aug 21, 2026 — Sep 20, 2026
- Observed arrivals
- 24
- Arrivals over 15 minutes late
- 3
- Observed cancellations
- 0
- Observed occurrences
- 36
Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 19, 2026Arrived | San Francisco | Boston | -42 | |
| Sep 18, 2026Arrived | San Francisco | Boston | -17 | |
| Sep 19, 2026Arrived | Ontario | San Francisco | 16 | |
| Sep 17, 2026Arrived | San Francisco | Boston | -12 | |
| Sep 18, 2026Arrived | Ontario | San Francisco | 88 | |
| Sep 16, 2026Arrived | San Francisco | Boston | -42 | |
| Sep 15, 2026Arrived | San Francisco | Boston | -53 | |
| Sep 14, 2026Arrived | San Francisco | Boston | -23 | |
| Sep 13, 2026Arrived | San Francisco | Boston | -43 | |
| Sep 14, 2026Arrived | Ontario | San Francisco | 14 | |
| Sep 12, 2026Arrived | San Francisco | Boston | -42 | |
| Sep 11, 2026Arrived | San Francisco | Boston | -20 | |
| Sep 10, 2026Arrived | San Francisco | Boston | -30 | |
| Sep 9, 2026Arrived | San Francisco | Boston | -46 | |
| Sep 8, 2026Arrived | San Francisco | Boston | -45 | |
| Sep 7, 2026Arrived | San Francisco | Boston | -14 | |
| Sep 8, 2026Arrived | Ontario | San Francisco | -3 | |
| Sep 6, 2026Arrived | San Francisco | Boston | -25 | |
| Sep 5, 2026Arrived | San Francisco | Boston | -43 | |
| Sep 4, 2026Arrived | San Francisco | Boston | -39 | |
| Sep 5, 2026Arrived | Ontario | San Francisco | -19 | |
| Sep 3, 2026Arrived | San Francisco | Boston | -4 | |
| Sep 3, 2026Arrived | Ontario | San Francisco | 31 | |
| Sep 2, 2026Arrived | San Francisco | Boston | -63 |