United Airlines
UA1665San Francisco to Boston
United Airlines flight UA1665 flies from San Francisco (SFO) to Boston (BOS), 4,341 km. Over August 2025 to July 2026 it usually arrives right on schedule: 79% of 557 flights arrived within 15 minutes of schedule and 1.3% were cancelled (US Department of Transportation data).
On-time record, last 12 months
79%
on time (within 15 min)
14%
more than 30 min late
1.3%
cancelled
+1 min
average arrival vs schedule
Every operation of UA1665, August 2025 to July 2026: 557 flights. Source: US Bureau of Transportation Statistics, public domain.
Routes flown as UA1665
- San Francisco (SFO) to Boston (BOS)343 flights
- New Orleans (MSY) to San Francisco (SFO)86 flights
- Ontario (ONT) to San Francisco (SFO)71 flights
- Seattle Tacoma (SEA) to San Francisco (SFO)24 flights
- Atlanta (ATL) to San Francisco (SFO)18 flights
- Santa Barbara (SBA) to San Francisco (SFO)15 flights
Other flights from San Francisco to Boston
More about San Francisco (SFO) and Boston (BOS).
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