UA638: United flight 638
Chicago (ORD) → San Francisco (SFO) · departs 12:42p, lands 3:35p local · Daily
The timetable below has every scheduled departure; for today's flight, check United.
An estimate from the published timetable, not live tracking: it cannot know about delays, diversions or cancellations.
Live status at United →The route
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UA638 timetable
Published departure and arrival times, each in its airport's local time, from the flights we sampled.
| Route | Departs | Arrives | Scheduled | Days |
|---|---|---|---|---|
| ORD → SFOChicago to San Francisco | 12:42p | 3:35p | 4h53m | Daily |
| SFO → HNLSan Francisco to Honolulu | 7:10p | 9:56p | 5h46m | Daily |
Other nonstops from Chicago to San Francisco
The departures either side of UA638. Times are Chicago time.
| Flight | Departs | Days |
|---|---|---|
| United UA543 | 10:25a | Daily |
| American AA1948 | 10:30a | Daily |
| United UA762 | 11:52a | Daily |
| This flight UA638 | 12:42p | Daily |
| American AA2253 | 1:26p | Daily |
| United UA1811 | 1:30p | Daily |
| United UA1577 | 2:30p | Daily |
All 22 flights from ORD to SFO, by time →
Flying back from San Francisco
United flies San Francisco to Chicago nonstop 84 times a week, from 12:35a to 11:30p: 12:35a UA2847 · 8:15a UA1568 · 1:50p UA1922 · 4:41p UA1887 · 11:30p UA368 · every nonstop SFO → ORD →
How UA638 ran in our sample
ORD → SFO
7 of 7 departures left within 15 minutes of schedule (Oct 25–31). Only flights that departed are counted: cancellations are not in our data.
Aircraft: Airbus A321neo on 6 of 7; also Boeing 737-900 (1).
SFO → HNL
7 of 7 departures left within 15 minutes of schedule (Oct 5–11). Only flights that departed are counted: cancellations are not in our data.
Other flights on this route: AS811 · UA1175 · UA2380 · UA300 · UA1509 · AS833 · all of them →
What time does UA638 leave Chicago?
UA638 is scheduled to depart Chicago (ORD) at 12:42p (daily), Chicago time, and to land in San Francisco (SFO) at about 3:35p local time, a scheduled 4h53m. Times are the published ones from the flights we sampled Oct 25–31; check United for today's.
What time does UA638 leave San Francisco?
UA638 is scheduled to depart San Francisco (SFO) at 7:10p (daily), San Francisco time, and to land in Honolulu (HNL) at about 9:56p local time, a scheduled 5h46m. Times are the published ones from the flights we sampled Oct 5–11; check United for today's.
What plane is UA638?
Airbus A321neo on 6 of the 7 UA638 flights from ORD we sampled Oct 25–31; the rest were a Boeing 737-900. Airlines swap aircraft, so the plane on a given day can differ.
Does UA638 fly every day?
Yes — UA638 flew Chicago to San Francisco every day of the week we sampled (Oct 25–31).
Is UA638 usually on time?
Of 7 UA638 departures from ORD we sampled Oct 25–31, 7 left within 15 minutes of the scheduled time. That counts only flights that departed — cancellations are not in our data — and one week is a small sample, so treat it as a hint, not a rating.
More United flights from Chicago
Timetable from United departures we observed; UA638 is a United Airlines flight number, and Hop Nonstop is not affiliated with United. Schedules change — confirm with the airline before you travel.