About 1 in 12 DL 3770 flights from Medford arrived 15+ minutes late, diverted or cancelled over the past year (8%); 0.6% were cancelled. The typical flight landed 15 minutes early.
DL 3770: MFR → SEA
Scheduled to leave Medford at 5:25 p.m. local time, operated by SkyWest as OO 3770. Over the past year it arrived on time 92% of the time (348 flights), in line with other DL flights on the route at that hour (92%). Last seen in the data Aug 31, 2026.
Usually Delta Air Lines's last flight of the day from Medford to Seattle (100% of days). Delta Air Lines's last MFR–SEA flight was cancelled 0.5% of the time, against 1.3% for its earlier ones. If it's cancelled, the next Delta Air Lines flight is usually around 6:15 a.m. the next morning.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 53 | 91% |
| Tuesday | 52 | 92% |
| Wednesday | 52 | 92% |
| Thursday | 51 | 88% |
| Friday | 50 | 86% |
| Saturday | 41 | 100% |
| Sunday | 49 | 94% |
Why it was late
All flights MFR → SEA · Connecting off DL 3770? Check the risk
DL 3770: SEA → MFR
Scheduled to leave Seattle at 3:15 p.m. local time, operated by SkyWest as OO 3770. Over the past year it arrived on time 91% of the time (332 flights), in line with other DL flights on the route at that hour (90%). Last seen in the data Aug 31, 2026.
Month by month
By day of week
| Day | Flights | On time |
|---|---|---|
| Monday | 51 | 88% |
| Tuesday | 50 | 96% |
| Wednesday | 50 | 92% |
| Thursday | 49 | 84% |
| Friday | 48 | 85% |
| Saturday | 38 | 100% |
| Sunday | 46 | 91% |
Why it was late
All flights SEA → MFR · Connecting off DL 3770? Check the risk
Questions
How often is DL 3770 from MFR to SEA late?
Delta Air Lines 3770 from Medford, OR to Seattle, WA arrived 15 or more minutes late, was diverted or was cancelled on 8% of 348 scheduled flights between September 2025 and August 2026. 0.6% were cancelled.
How often is DL 3770 from SEA to MFR late?
Delta Air Lines 3770 from Seattle, WA to Medford, OR arrived 15 or more minutes late, was diverted or was cancelled on 9% of 332 scheduled flights between September 2025 and August 2026. 0.3% were cancelled.
Flight numbers change. Figures cover flights with this airline, number and route only. "Likely range" is the 95% interval for the true on-time rate given the number of flights. This is history, not live status: check Delta Air Lines for today's flight. Method.