tailodds FORECAST
Connection · one ticket · schedule Jun 6 – Jul 31, 2026 · records Aug 2025 – Jul 2026

San Francisco → Washington via Boston: arrives on time 32%

  1. 12:20 SFO → 21:02 BOS
    DL 977 · Delta · 5h 42m · 60% on time, 2.0% cancelled
  2. 48m layover in Boston (BOS) · 45 min minimum on one ticket
  3. 21:50 BOS → 23:43 DCA
    DL 5704 · Delta, flown by Republic · 1h 53m · 77% on time, 7.7% cancelled

Total trip 8h 23m, scheduled departure to arrival (Washington is 3 h ahead of San Francisco). Times are local. Both flew on 48 of the last 56 days.

Makes the connection47%The first flight arrived more than 3 minutes late on 53% of the days it flew: too late for the 45-minute minimum connection on a 48m layover.
Arrives on time32%First flight not cancelled (2.0% are) × connection made (47%) × second flight not cancelled (7.7% are) and within 15 minutes (77%).
Total trip8h 23mSFO 12:20 to DCA 23:43, layover included

Tight connection: often missed. The first flight is late enough to miss it on more than 1 day in 4.

Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.